Compact government model handgun

Information

  • Patent Grant
  • 6557288
  • Patent Number
    6,557,288
  • Date Filed
    Friday, November 30, 2001
    23 years ago
  • Date Issued
    Tuesday, May 6, 2003
    21 years ago
  • Inventors
  • Examiners
    • Jordan; Charles T.
    • Zerr; John W.
    Agents
    • Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Abstract
A government model semi-automatic handgun is disclosed. The handgun includes a frame having a rear end, a barrel having a tip, and a slide having a front side and a back side, and a grip safety having an outer surface. An outer surface of the hammer substantially aligns with the back side of the slide when the slide is in a forward position and the hammer is in a rest position. In addition, the length of the handgun as defined by between the barrel tip and the rear end of the frame may be greater than the length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
Description




BACKGROUND OF THE INVENTION




The present invention relates to a government model semi-automatic handgun. More particularly the invention relates to a compact government model semi-automatic handgun.




There are a large variety of handguns available on the market. Each type of handgun has different design features, which may make a particular handgun more suitable for a particular user or purpose. The government model handgun, for example has certain characteristics that make it the preferred sidearm for many law enforcement and military personnel. In particular, the safety features, reliable operation, and ammunition-carrying characteristics inherent in the design of the government model make the weapon well suited for the needs of law enforcement and military users.




Conventional government model handguns (also referred to as 1911A1 model handguns) have typically been single action handguns. In a single action handgun, the hammer of the handgun must be cocked prior to pulling the trigger to fire a round. The hammer may be cocked manually, by retracting the hammer or by “racking” the slide, or automatically, by the recoil action of the slide acting on the hammer.




One of the noted safety features of a government model handgun is a grip safety. The grip safety is operatively engaged with the hammer of the handgun to prevent the hammer from moving until the grip safety is released. As its name implies, the grip safety is located in the grip of the handgun and is disengaged when a user picks up the gun and holds it in a firing position. This helps prevent the weapon from discharging when the handgun is not held in a firing position.




However, the design of the government model does have certain drawbacks. For example, to facilitate manual retraction of the hammer, the hammer includes a spur that projects from the rear of the slide. The spur includes a series of ridges to allow the user to retract the hammer with his thumb. After a fired shot, however, the recoil action of the slide moves the spur of the hammer into close proximity to the top of the grip safety. For certain users, who have large hands, a potential exists for the web of skin between the thumb and forefinger to be pinched between the hammer spur and the grip safety.




To prevent this painful occurrence, the grip safety of the government model has been made with a safety ridge to prevent the user's hand from entering the gap between the hammer and grip to thereby prevent the possibility of pinching the web. In some models equipped with a “beaver tail,” the safety ridge extends a greater distance from the frame of the handgun. However, the extended safety ridge also increases the overall profile of the weapon, which makes it difficult to remove the gun quickly and smoothly from a holster.




In light of the foregoing there is a need for a compact version of a government model semi-automatic handgun.




SUMMARY OF THE INVENTION




Accordingly, the present invention is directed to a government model handgun that obviates one or more of the limitations and disadvantages of the prior art government model handguns. The advantages and purposes of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.




One aspect of the invention is directed to a semi-automatic handgun that includes a frame and a slide having a front side and a back side. The slide is mounted on the frame for sliding movement between a forward position and a backward position. A hammer is mounted on the frame for pivoting movement between a rest position and a rearward position. The hammer has an outer surface that is configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position. A grip safety is disposed in the frame and has a safe position where the grip safety prevents the hammer from moving.




Another aspect of the invention is directed to a semi-automatic handgun that has a frame having a rear end, a barrel having a tip, and a slide having a front side and a back side. The slide is mounted on the frame for sliding movement between a forward position and a backward position. A hammer is mounted on the frame for pivoting movement between a rest position and a rearward position. The hammer has an outer surface that is configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position. A grip safety having an outer surface is disposed in the frame. The grip safety has a safe position where the grip safety prevents the hammer from moving. The length of the handgun as defined by the barrel tip and the rear end of the frame is greater than the length of the handgun as defined by the barrel tip and the outer surface of the grip safety.




Yet another aspect of the invention is directed to a semi-automatic handgun that includes a frame having a rear end, a barrel having a tip, and a slide having a front side and a back side. The slide is mounted on the frame for sliding movement between a forward position and a backward position. A hammer is mounted on the frame for pivoting movement between a rest position and a rearward position. A grip safety is disposed in the frame and has an outer surface. The grip safety has a safe position where the grip safety prevents the hammer from moving. The length of the handgun as defined by the barrel tip and the rear end of the frame is greater than the length of the handgun as defined by the barrel tip and the outer surface of the grip safety.




Still another aspect of the invention is directed to a method of manufacturing a semi-automatic handgun. A frame having a rear end is provided. A slide having a front side and a back side is mounted on the frame for sliding movement between a forward position and a backward position. A hammer is mounted on the frame for pivoting movement between a rest position and a rearward position. The hammer has an outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position. A grip safety having an outer surface is disposed in the frame. The grip safety is operatively connected to the hammer to prevent the hammer from moving.




A further aspect of the invention is directed to a method of manufacturing a semi-automatic handgun. A frame having a rear end is provided. A barrel having a tip is disposed on the frame. A slide having a front side and a back side is mounted on the frame for sliding movement between a forward position and a backward position. A grip safety having an outer surface is disposed in the frame. The grip safety is operable to selectively prevent the semi-automatic handgun from firing. The length of the handgun as defined by the barrel tip and the rear end of the frame is greater than the length of the handgun as defined by the barrel tip and the outer surface of the grip safety.




It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.











BRIEF DESCRIPTION OF THE DRAWINGS




The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings,





FIG. 1



a


is a perspective view of a conventional government model semiautomatic handgun;





FIG. 1



b


is a side view of the handgun of

FIG. 1



a;







FIG. 2



a


is a perspective view of a government model semi-automatic handgun according to an embodiment of the present invention;





FIG. 2



b


is a side view of the handgun of

FIG. 2



a;







FIG. 3

is an exploded view of a government model handgun according to an embodiment of the present invention;





FIG. 4



a


is a perspective view of a hammer for a government model handgun having a conventional spur;





FIG. 4



b


is a side view of the hammer of

FIG. 4



a;







FIG. 5



a


is a perspective view of a hammer for a government model handgun according to an embodiment of the present invention;





FIG. 5



b


is a side view of the hammer of

FIG. 5



a;







FIG. 5



c


is a front view of the hammer of

FIG. 5



a;







FIG. 6



a


is a side view of a conventional grip portion of a grip safety for a government model handgun;





FIG. 6



b


is a side view of a second conventional grip portion of a grip safety for a government model handgun;





FIG. 7



a


is a perspective view of a grip portion of a grip safety for a government model handgun in accordance with an embodiment of the present invention;





FIG. 7



b


is a side view of the grip portion of

FIG. 7



a;







FIG. 7



c


is a front view of the grip portion of

FIG. 7



a;







FIG. 8



a


is a side view of a conventional government model handgun, illustrating a hammer in a rest position;





FIG. 8



b


is a side view of another conventional government model handgun, illustrating the hammer in the rest position;





FIG. 8



c


is a perspective view of the handgun of

FIG. 8



b


illustrating the hammer in a fully cocked position;





FIG. 8



d


is a side view of the handgun of

FIG. 8



b


illustrating the hammer in a fully cocked position;





FIG. 9



a


is a side view of a government model handgun according to an embodiment of the present invention, illustrating the hammer in a rest position;





FIG. 9



b


is a side view of the handgun of

FIG. 9



a,


illustrating the hammer in a half-cocked position;





FIG. 9



c


is a perspective view of the handgun of

FIG. 9



a,


illustrating the hammer in the half-cocked position and





FIG. 9



d


is a side view of the handgun of

FIG. 9



a,


illustrating the hammer in a fully cocked position.











DETAILED DESCRIPTION




Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.




As illustrated in the accompanying Figures, a compact government model semi-automatic handgun is provided. For the purposes of this disclosure, the term “government model” refers to the 1911A1 semi-automatic handgun. The 1911A1 model handgun is disclosed in U.S. Pat. No. 984,519, which is hereby incorporated by reference. U.S. Pat. No. 984,519 discloses the overall structure and operation of the 1911A1 model handgun and its disclosure of the basic structural components and operation will not be repeated. A 1911A1 model handgun is shown in

FIGS. 1



a


-


1




b


and is designated generally by reference number


20


.




For the purposes of this disclosure, the “front” of the handgun refers to the barrel exit side (reference number


32


), the “top” of the handgun refers to the slide side (reference number


28


), the “rear” of the handgun refers to the grip safety side (reference number


24


), and the “bottom” of the handgun refers to the magazine entrance side (reference number


34


).




As illustrated in

FIG. 1



a,


a conventional government model handgun includes a frame


30


. Frame


30


includes a slide support


42


, a magazine entrance


34


disposed at the lower end of a grip


36


, and a trigger guard


38


. Frame


30


mounts a hammer


22


that is disposed at the rear of the handgun, a slide


28


that is disposed on frame support


42


at the top of the handgun, and a grip safety


26


that is disposed at the rear of the handgun.





FIG. 1



b


illustrates the typical dimensions used to represent the size of a handgun. The height of the handgun can be measured in three distances: (1) the distance between the top of slide


28


and the bottom of grip


36


(as indicated by H


1


); (2) the distance between the top of slide


28


and the lower portion of trigger guard


38


(as indicated by H


2


); and (3) the distance between the top of slide


28


and the lower portion of slide support


42


(as indicated by H


3


).




In a conventional government model handgun, H


1


is approximately 4.65 inches, H


2


is approximately 2.65 inches, and H


3


is approximately 1.53 inches.




The length of the handgun can be measured in four distances: (1) the distance between barrel tip


32


and the rear of grip safety


26


(as indicated by L


1


); (2) the distance between barrel tip


32


and the rear of frame


44


(as indicated by L


2


); (3) the distance between barrel tip


32


and the rear end of slide


28


(as indicated by L


3


); and (4) the distance between barrel tip


32


and the rear of hammer


22


(as indicated by L


4


).




In a conventional government model handgun, with a “beaver tail” type grip safety (as illustrated in

FIGS. 1



a


and


1




b


), L


1


is approximately 6.72 inches, L


2


is approximately 6.36 inches, L


3


is approximately 5.67 inches, and L


4


is approximately 6.02 inches.




An embodiment of a government model handgun according to the present invention is illustrated in

FIGS. 2



a


and


2




b


and is generally designated by the reference number


50


. It is contemplated that the handgun may operate as either a single action or a double action. As is known in the art, the conventional government model handgun is a singe action, meaning that the hammer must be cocked prior to pulling the trigger. The hammer may be cocked manually, by retracting the hammer to engage it with the sear or by manually retracting, or “racking,” the slide. The recoil action of the slide may also cock the hammer.




As described in co-pending U.S. patent application Ser. No. 09/139,027, the disclosure of which is hereby incorporated by reference in its entirety, a government model handgun may also operate in a double action mode. U.S. patent application Ser. No. 09/139,027 discloses the structure an action government model handgun in detail and its disclosure of the structural components and operation will not be repeated.




Handgun


20


, may include a double action trigger mechanism, which may be, for example, similar to that described in U.S. patent application Ser. No. 09/139,027. As illustrated in

FIG. 3

, a trigger


60


is pivotally disposed on frame


30


with a trigger pin


62


. A trigger spring


64


is positioned adjacent trigger


60


and biases trigger


60


to a forward position. Trigger


60


is connected to a drawbar


66


with a pin


68


.




Drawbar


66


is slidably disposed in frame


30


and has a rear leg


70


. A tab


72


extends from rear leg


70


. A drawbar spring


74


acts on rear leg


70


to bias drawbar


66


upwardly.




The handgun also includes a sear


76


that is preferably rotatably mounted on a sear pin


78


. Sear


76


has a lower tab


80


, a drawbar contact


82


, and a main contact


84


. Sear


76


is positioned adjacent a hammer cam


86


and proximate a leaf spring


88


. Leaf spring


88


has a sear prong


90


that contacts lower tab


80


of sear


76


to bias main contact


84


of sear


76


towards hammer cam


86


.




The hammer cam


86


is rotatably mounted on a hammer pin


92


. Hammer cam


86


has a first engagement step


94


and a second engagement step


96


. Hammer cam


86


is connected to a strut


102


by a pin


100


that engages an opening


104


in the hammer cam


86


and an opening


98


in strut


102


. Strut


102


connects hammer cam


86


to a hammer spring


106


. Preferably, strut


102


has a boss


108


and a lower end


110


. Lower end


110


of strut


102


engages a plug


112


that fits within hammer spring


106


. Hammer spring


106


is supported within main spring housing


114


.




The pin


100


and opening


104


in hammer cam


86


are positioned such that the rotation of the hammer cam results in a generally downward motion of strut


102


. The generally downward motion of strut


102


compresses hammer spring


106


. The compressed hammer spring


106


acts on hammer cam


86


through strut


102


to bias hammer cam


86


to rotate about hammer pin


92


.




Hammer cam


86


is rotatable into a cocked position, where sear


76


engages first engagement step


94


of hammer cam


86


. The rotation of hammer cam


86


to reach this position moves strut


102


generally downward, which compresses hammer spring


106


. Thus, the engagement of sear


76


with hammer cam


86


holds hammer spring


106


in a compressed position, thereby storing the energy of the compressed hammer spring


106


.




When sear


76


is disengaged from hammer cam


86


, hammer spring


106


acts on hammer cam


86


to rotate hammer cam


86


. The released hammer spring


106


acts on hammer cam


86


through strut


102


. The force of hammer spring


106


rotates hammer cam


86


back to the uncocked position.




As also shown in the Figures, handgun


20


includes a hammer. The hammer has a cocked and an uncocked position and includes an outer surface and a contact surface. The outer surface of the hammer substantially aligns with a rear surface of the slide when the hammer is in the uncocked position.




As illustrated in

FIG. 3

, handgun


50


includes hammer


52


, hammer pin


92


, and a hammer return spring


118


. Hammer


52


includes an outer surface


116


and a contact surface


117


and is rotatably mounted on hammer pin


92


. Hammer return spring


118


acts on the hammer


52


to rotate it about the hammer pin


92


from the cocked position to the uncocked position.





FIGS. 4



a


and


4




b


illustrate a hammer


22


for a conventional government model handgun. Hammer


22


includes a spur


23


and an opening


25


. Opening


25


is configured to receive hammer pin


92


. Spur


23


extends from the rear of the handgun (as illustrated in

FIGS. 1



a


and


1




b


) and includes a series of ridges


127


. Spur


23


of hammer


22


has a width W


h


. In a conventional hammer, W


h


is approximately 0.62 inches.




When operating the conventional handgun, a user may manually retract hammer


22


by gripping ridges


127


of hammer


22


with a thumb and pivoting hammer


22


about the hammer pin


92


. In this manner, the conventional handgun may be manually cocked. In addition, the recoil action of slide may pivot hammer


22


about hammer pin


92


to automatically cock the conventional handgun after each round is fired.





FIGS. 5



a


-


5




c


illustrate a hammer


52


according to the present invention. Hammer


52


includes a firing section


134


that is joined to a first side support


130


and a second side support


132


. Firing section


134


includes a contact surface


117


and an outer surface


116


. Outer surface extends in a substantially direct line from side supports


130


and


132


to the top of hammer


52


. Notably, the hammer spur present in the conventional government model handgun hammer is excluded from the hammer of the present invention. The greatest width of firing section


134


is indicated as W


h


in

FIG. 5



b.


Preferably, W


h


is approximately 0.30 inches, which is less than half of the greatest width of the conventional hammer. More preferably, W


h


is approximately 0.295 inches.




First and second side supports


130


and


132


define a slot


135


having an interior surface


136


. As illustrated in

FIG. 5



c


, a groove


138


is positioned at the rear of interior surface


136


to form a cam contact


140


and a return spring contact


142


.




As shown in

FIG. 5



a,


the outer edge of first side support


130


defines a drawbar notch


144


. As shown in

FIG. 5



b,


the outer edge of second side support


132


defines a grip safety notch


146


and a manual safety groove


148


. The outer edges of each of the first and second side supports


130


and


132


also include a half-cock notch


150


. Each half-cock notch


150


has an outer tab


152


.




Hammer cam


86


is detachably coupled with hammer


52


. Hammer cam


86


is preferably positioned between the side supports


130


and


132


of hammer


52


. Both hammer


52


and hammer cam


86


are rotatably disposed on hammer pin


92


. When hammer cam


86


is in the uncocked position (as described previously), second engagement step


96


of hammer cam


86


engages cam contact


140


of hammer


52


. Because of this engagement, a rearward rotation of hammer


52


from the uncocked position will translate to a corresponding rearward rotation of hammer cam


86


.




After hammer


52


and hammer cam


86


have been rotated through a certain angle, main contact


84


of sear


76


engages first engagement step


94


of hammer cam


86


. Preferably, sear


76


will engage first engagement step


94


of hammer cam


86


after the hammer and hammer cam have been rotated about 60° from the fully uncocked position (or approximately 55° past vertical).




As discussed previously, hammer


52


of the present invention does not include a spur. Accordingly, the retraction of hammer


52


to cock hammer cam


86


may be accomplished by a rearward motion of slide


28


. Slide


28


may be moved manually or automatically in response to a fired round. In either case, slide


28


will retract hammer


52


sufficiently to allow sear


76


to engage and hold hammer cam


86


in the cocked position.




After sear


76


engages hammer cam


86


, hammer return spring


118


biases hammer


52


away from hammer cam


86


. Hammer


52


rotates forwardly until half-cock notches


150


engage main contact


84


of sear


76


. Thus, the hammer cam remains engaged with sear


76


in the cocked position to hold hammer spring


106


compressed while hammer


52


is biased out of engagement with hammer cam


86


and into the half-cocked position.




Drawbar


66


is positioned such that rear tab


72


is adjacent hammer


52


. Trigger spring


64


acts indirectly through the trigger on drawbar


66


to bias it into a rearward position and drawbar spring


74


acts on rear leg


70


to bias drawbar upwardly. The upward bias of drawbar spring


74


ensures that rear tab


72


will engage drawbar notch


144


of hammer


52


. Rear tab


72


is also aligned with drawbar contact


82


of sear


76


.




Preferably, strut


102


includes a boss


108


. Boss


108


is positioned on strut


102


such that when hammer cam


86


is in the uncocked position, boss


108


aligns with rear tab


72


of drawbar


66


and prevents drawbar


66


from moving. Thus, when hammer cam


86


is in the uncocked position boss


108


may prevent drawbar


66


from moving into engagement with drawbar notch


144


on hammer


52


.




Movement of hammer cam


86


to the cocked position similarly moves strut


102


downwardly so that boss


108


moves out of alignment with rear tab


72


of drawbar


66


. Thus, when hammer cam


86


is in the cocked position, boss


108


does not prevent trigger


60


from being pulled.




When hammer cam


86


is cocked and drawbar


66


moves forward in response to a trigger pull, rear tab


72


engages drawbar notch


144


on hammer


52


and causes hammer


52


to rotate rearwardly. As the trigger pull continues, rear tab


72


of drawbar will eventually make contact with drawbar engagement


82


of sear


76


. Rear tab


72


disengages sear


76


from hammer cam


86


thereby releasing the compressed hammer spring


106


.




When hammer spring


106


is released, it acts through strut


102


to cause hammer cam


86


to rotate. As hammer cam


86


rotates, second engagement step


96


of hammer cam


86


approaches cam contact


140


of hammer


52


. Just prior to second engagement step


96


engaging cam contact


140


, hammer cam


86


rotates into engagement with rear tab


72


of the drawbar. The contact moves rear tab


72


away from drawbar notch


144


to release hammer


52


. The second engagement step


96


then contacts cam contact


140


of hammer


52


to rotate it forwardly to fire the handgun.




As further shown in the Figures, handgun


20


includes a grip safety. As illustrated in

FIG. 3

, the grip safety includes a grip portion


54


and a lever


145


. Grip portion


54


includes an opening


151


that aligns with an opening


99


in frame


30


. A pin (not shown) connects grip portion


54


to the frame


30


to allow grip portion


54


to rotate relative to frame


30


. Grip portion


54


also includes a groove having an inner surface


148


.




Lever


145


has an opening


147


and a hammer engagement


149


. Opening


147


engages sear pin


78


upon which lever


145


rotates. Hammer engagement


149


is positioned to engage grip safety notch


146


in hammer


52


. The lower end of lever


145


and lower end


144


slides along surface


148


of grip portion


54


.




Leaf spring


88


has a grip prong


137


and a lever prong


139


. Grip prong


137


acts on grip portion


54


to rotate the grip portion


54


to a rearward position. Lever prong


139


acts on the upper end of lever


149


to rotate hammer engagement


149


into engagement with grip safety notch


146


of hammer


52


.




When the handgun is not held in a typical firing position, i.e. the grip portion


54


of grip safety is not held by a user's hand, leaf spring


88


biases the grip safety into a safe position, where the hammer engagement


149


of lever


145


engages grip safety notch


146


of hammer


52


. This engagement prevents the hammer from rotating when the grip is not being held and will prevent the handgun from firing unless the handgun is properly held. Alternatively, the grip safety may be designed to block another component of the handgun, such as the sear or drawbar, to prevent accidental discharges of the weapon.




When a user grips the handgun


50


in a typical firing position, the user moves the grip portion


54


relative to the frame


30


. The force exerted on grip portion


54


overcomes the bias of leaf spring


88


and moves the grip portion


54


moves to a forward, firing position. As grip portion


54


moves relative to frame


30


, the lower end of lever


145


slides along inner surface


148


of grip portion


54


, thereby causing lever


145


to rotate about sear pin


78


. This rotation causes hammer engagement


149


to rotate out of engagement with grip safety notch


146


of hammer


52


. In this firing position, hammer


52


may freely rotate with respect to frame


30


so that the handgun may be fired.





FIGS. 6



a


and


6




b


illustrate two conventional grip portions of a grip safety for a government model handgun. As shown in

FIG. 6



a,


grip portion


24


includes a safety ridge


26


that extends away from opening


151


. In the grip portion


24


illustrated in

FIG. 6



b


, grip portion


24


includes a larger safety ridge


27


known as a beaver tail. The beaver tail safety ridge


27


also includes an opening


29


configured to receive spur


23


of hammer


22


when the hammer is retracted by the recoil action of the slide. Thus, the safety ridges


26


and


27


protect a user's hand from being pinched between spur


23


of hammer


22


(referring to

FIGS. 4



a


and


4




b


) and grip portion


24


of the grip safety.





FIGS. 7



a


-


7




c


illustrate a grip portion


54


of a grip safety according to exemplary embodiments of the present invention. Grip portion


54


includes an outer surface


56


. Outer surface


56


generally follows the contours of opening


151


. Notably absent is a safety ridge extending away from opening


151


.




Preferably, as illustrated in

FIGS. 9



c


and


9




d,


frame


30


includes angled surfaces


57


adjacent to the pivot point of grip safety


54


. Angled surfaces


57


are disposed on both sides of frame


30


and are configured to conform to outer surface


56


of grip safety


54


. Angled surfaces


57


reduce the likelihood that frame


30


will catch on an article of clothing or a holster when the handgun is withdrawn from its carrying position.





FIGS. 8



a


and


8




b


illustrate conventional government model handgun


20


where hammer


22


is in the uncocked position. As shown in

FIG. 8



a,


standard safety ridge


26


extends away from frame


30


and is configured to prevent any portion of the user's hand from approaching spur


23


of the hammer. As shown in

FIG. 8



b,


“beaver tail” safety ridge


27


similarly extends away from frame


30


. The “beaver tail” safety ridge of

FIG. 8



b


extends further than the safety ridge of

FIG. 8



a.







FIGS. 8



c


and


8




d


illustrate conventional government model handgun


20


where hammer


22


is in the cocked position. As described previously, hammer


22


may be cocked by manually retracting the hammer. To achieve the cocked position, hammer


22


is rotated through an angle α (measured from the vertical) of at least 60°. After hammer is rotated past this angle and released, the hammer spring of the handgun acts on the hammer cam through the strut to rotate the hammer cam into engagement with the sear. From this position, the trigger may be pulled to release the hammer and fire a round of ammunition.




In response to the fired round, the recoil action moves slide


28


rearwardly along slide support


42


. Slide


28


engages hammer


22


and retracts hammer


22


. Slide


28


moves hammer


22


through angle α of at least 60°. When hammer


22


is in its most rearward position, spur


23


approaches, and may contact, upper surface of grip safety


24


. In the “beaver tail” version of grip safety


24


(as illustrated in

FIGS. 8



c


and


8




d


), spur


23


enters into opening


29


, but does not contact grip safety


24


. However, if the user has large hands and any portion of the user's hand is positioned on the top surface of the grip safety when a round is fired, the motion of the hammer will cause spur


23


of hammer


22


to pinch the user's hand. Given the great magnitude of the recoil force, any such pinching of the user's hand can be a very painful experience.





FIGS. 9



a


-


9




c


illustrate an embodiment of a compact government model handgun. Preferably, as shown in

FIG. 9



a,


when hammer


52


is in the fully uncocked position, the substantial entirety of hammer


52


is disposed within slide


28


such that outer edge


116


of the hammer substantially aligns with a rear end


160


of slide


28


. For the purposes of the present disclosure, the term “substantially aligns” is intended to include those hammer and slide configurations wherein the outer shape of the hammer conforms to the outer shape of the slide so that the hammer is not likely to catch on an article passing over the rear of the slide. For example, outer edge


116


may be flush with rear end


160


of slide


28


or outer edge


116


may be slightly inside or outside of rear end


160


of slide


28


. In this configuration, it would be difficult for a user to grasp the hammer to cock the hammer. Thus, the hammer may be cocked by either manually retracting the slide or by the automatic retraction of the slide in response to the recoil action of a fired round.




As described previously, the width of hammer


52


may be as much as approximately 0.375 inches less than the width of hammer


22


of a conventional government model. The difference in width translates to a larger gap between outer edge


116


of hammer


52


and the upper surface of grip safety


54


when hammer is in its most rearward position. Accordingly, the likelihood of a user's hand being pinched during the recoil action of the handgun is significantly reduced. Thus, with the present invention, the need for a safety ridge on the grip safety to protect the user's hand is obviated.




As will also be apparent from the foregoing disclosure, the removal of the spur from hammer


22


reduces the mass of hammer


22


. During operation of the handgun, the reduction in mass of hammer


22


allows hammer


22


to complete a firing cycle more rapidly than a conventional hammer with a spur and, thus, a larger mass. Accordingly, a handgun having a spurless hammer may fire consecutive shots in a shorter amount of time than a handgun having a conventional hammer.




As illustrated in

FIGS. 9



b


,


9




c,


and


9




d,


after hammer


52


is cocked and the slide returns to its forward position, the hammer return spring acts on hammer


52


to move the hammer to its half cocked position. In the half cocked position, hammer


52


rests at an angle α of approximately 0° from vertical.




Because the sizes of the hammer and the grip safety are reduced, a compact version of the government model handgun is provided. Referring to the dimensions identified in

FIG. 2



b


, L


1


may be approximately 6.13 inches, L


2


is approximately 6.36 inches, L


3


and L


4


may be approximately 5.67 inches, H


1


may be approximately 4.65 inches, H


2


may be approximately 2.65 inches, and H


3


may be approximately 1.53 inches. More preferably, L


1


may be approximately 6.123 inches, L


2


may be approximately 6.359 inches, L


3


and L


4


may be approximately 5.667 inches, H


1


may be approximately 4.650 inches, H


2


may be approximately 2.647 inches, and H


3


may be is approximately 1.525 inches.




Thus, by reducing the size of the grip safety the overall length of the handgun is reduced. In the embodiment of the present invention illustrated in

FIG. 2



b,


the greatest length of the handgun is indicated by length L


2


(distance from barrel tip to rear of grip), whereas the greatest length of the conventional government model handgun as illustrated in

FIG. 1



b


is indicated by length L


1


(distance from barrel tip to rear of grip safety). This results in an overall reduction in length of approximately 0.35 inches between the conventional government model handgun with a beaver tail type grip safety and a government model handgun according to an embodiment of the present invention. It is also noted that the length of the handgun at the area of the grip safety (indicated by length L


2


) is reduced by approximately 0.59 inches between the conventional government model handgun with a beaver tail type grip safety and a handgun according to an embodiment of the present invention.




In addition, the number and size of projections in the area of the hammer is reduced, i.e. the hammer spur and the grip safety. This reduces the likelihood that the either the hammer or the grip safety will catch on a holster or another article of clothing when a user draws the handgun from its storage location.




It is contemplated that the reduced size of the grip safety provides for a smaller overall grip length. Because the danger of the hammer pinching a user's hand is removed, the grip of the handgun need not be as long as the grip of a conventional government model handgun. Thus, the length of the grip of the handgun may also be reduced, which translates to a reduction in the overall height, H


1


, of the handgun. Accordingly, a smaller magazine, such as a six-round magazine, instead of the more typical seven-round magazine, may be used. This will further reduce the overall size of the handgun.




It will be apparent to those skilled in the art that various modifications and variations can be made in the construction of this compact government model semi-automatic handgun without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein.



Claims
  • 1. A semi-automatic handgun, comprising:a frame; a slide having a front side and a back side, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and a grip safety disposed in the frame, the grip safety having a safe position where the grip safety prevents the hammer from moving.
  • 2. The semi-automatic handgun of claim 1, wherein the grip safety has a firing position where the grip safety does not interfere with the movement of the hammer.
  • 3. The semi-automatic handgun of claim 1, further comprising a barrel having a tip and wherein the frame includes a rear end, the grip safety includes an outer surface, and a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 4. The semi-automatic handgun of claim 3, wherein the first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches and the second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches.
  • 5. The semi-automatic handgun of claim 4, wherein the frame has a bottom, the slide has a top and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 6. The semi-automatic handgun of claim 1, wherein the hammer includes a grip safety notch and the grip safety includes a hammer engagement configured to engage the grip safety notch to prevent the hammer from moving.
  • 7. The semi-automatic handgun of claim 1, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is located where the firing section is connected to the first and second side supports.
  • 8. The semi-automatic handgun of claim 7, wherein the greatest width of the firing section is approximately 0.30 inches.
  • 9. A semi-automatic handgun, comprising:a frame having a rear end; a barrel having a tip; a slide having a front side and a back side, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially/ align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and a grip safety having an outer surface disposed in the frame, the grip safety having a safe position where the grip safety prevents the hammer from moving, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 10. The semi-automatic handgun of claim 9, wherein the grip safety has a firing position where the grip safety does not interfere with the movement of the hammer.
  • 11. The semi-automatic handgun of claim 9, wherein the first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches and the second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches.
  • 12. The semi-automatic handgun of claim 9, wherein the frame has a bottom, the slide has a top, and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 13. The semi-automatic handgun of claim 9, wherein the hammer includes a grip safety notch and the grip safety includes a hammer engagement configured to engage the grip safety notch to prevent the hammer from moving.
  • 14. The semi-automatic handgun of claim 9, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is located where the firing section is connected to the first and second side supports.
  • 15. The semi-automatic handgun of claim 14, wherein the greatest width of the firing section is approximately 0.30 inches.
  • 16. A semi-automatic handgun, comprising:a frame having a rear end; a barrel having a tip; a slide having a front side and a back side, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position; and a grip safety disposed in the frame and having an outer surface, the grip safety having a safe position where the grip safety engages the hammer to prevent the hammer from pivoting from the rest position to the rearward position, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 17. The semi-automatic handgun of claim 16, wherein the first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches and the second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches.
  • 18. The semi-automatic handgun of claim 17, wherein the frame has a bottom, the slide has a top, and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 19. The semi-automatic handgun of claim 16, wherein the grip safety has a firing position where the grip safety does not interfere with the movement of the hammer.
  • 20. The semi-automatic handgun of claim 16, wherein the hammer has an outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position.
  • 21. The semi-automatic handgun of claim 16, wherein the hammer includes a grip safety notch and the grip safety includes a hammer engagement configured to engage the grip safety notch to prevent the hammer from moving.
  • 22. The semi-automatic handgun of claim 16, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is located where the firing section is connected to the first and second side supports.
  • 23. The semi-automatic handgun of claim 22, wherein the greatest width of the firing section is approximately 0.30 inches.
  • 24. A method of manufacturing a semi-automatic handgun, comprising:providing a frame having a rear end; mounting a slide having a front side and a back side on the frame for sliding movement between a forward position and a backward position; mounting a hammer on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and disposing a grip safety having an outer surface in the frame, the grip safety operable to selectively engage the hammer to prevent the hammer from moving.
  • 25. The method of claim 24, further comprising the step of disposing a barrel having a tip on the frame, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 26. A method of manufacturing a semi-automatic handgun, comprising:providing a frame having a rear end; disposing a barrel having a tip on the frame; mounting a hammer on the frame for pivoting movement between a rest position and a rearward position; mounting a slide having a front side and a back side on the frame for sliding movement between a forward position and a backward position; and disposing a grip safety having an outer surface in the frame, the grip safety operable to selectively prevent the hammer from pivoting from the rest position to the rearward position, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 27. The method of claim 26, wherein the hammer has an outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position.
  • 28. A method of manufacturing a semi-automatic handgun, comprising:providing a frame having a rear end; disposing a barrel having a tip on the frame; forming a slide having a front side and a back side; mounting a hammer on the frame for pivoting movement between a rest position and a rearward position; mounting the slide on the frame for sliding movement between a forward position and a backward position; and disposing a grip safety having an outer surface in the frame, the grip safety operable to selectively prevent the hammer from pivoting from the rest position to the rearward position, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 29. The method of claim 28, wherein the hammer has an outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position.
  • 30. A method of manufacturing a semi-automatic handgun, comprising:providing a frame having a rear end; mounting a slide having a front side and a back side on the frame for sliding movement between a forward position and a backward position; forming a hammer having a rear outer surface; mounting the hammer on the frame for pivoting movement between a rest position and a rearward position such that the rear outer surface of the hammer substantially aligns with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and disposing a grip safety having an outer surface in the frame, the grip safety operable to selectively engage the hammer to prevent the hammer from moving.
  • 31. The method of claim 30, further comprising the step of disposing a barrel having a tip on the frame, wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 32. A semi-automatic handgun, comprising:a frame having an outer surface and a rear end; a slide having a front side and a back side, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and a grip safety disposed in the frame and having an outer surface that substantially conforms to the outer surface of the frame, the grip safety selectively operable to engage the hammer and prevent the hammer from moving.
  • 33. The semi-automatic handgun of claim 32, further comprising a barrel having a tip and wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 34. The semi-automatic handgun of claim 33, wherein the first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches and the second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches.
  • 35. The semi-automatic handgun of claim 34, wherein the frame has a bottom, the slide has a top, and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 36. The semi-automatic handgun of claim 32, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is approximately 0.30 inches.
  • 37. A semi-automatic handgun, comprising:a frame having an outer surface, a rear end, and a bottom; a barrel having a tip; a slide having a front side, a back side and a top, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; and a grip safety disposed in the frame and having an outer surface that substantially conforms to the outer surface of the frame, the grip safety selectively operable to engage the hammer and prevent the hammer from moving; wherein a first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches, a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches, and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 38. The semi-automatic handgun of claim 37, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is approximately 0.30 inches.
  • 39. A semi-automatic handgun, comprising:a frame having an outer surface; a slide having a front side and a back side, the slide mounted on the frame for sliding movement between a forward position and a backward position; a hammer mounted on the frame for pivoting movement between a rest position and a rearward position, the hammer having a rear outer surface configured to substantially align with the back side of the slide when the slide is in the forward position and the hammer is in the rest position; a hammer cam rotatably disposed in the frame and selectively engageable with the hammer; and a grip safety disposed in the frame and having an outer surface that substantially conforms to the outer surface of the frame, the grip safety selectively operable to engage the hammer and prevent the hammer from moving.
  • 40. The semi-automatic handgun of claim 39, further comprising a barrel having a tip and wherein the frame includes a rear end, the grip safety includes an outer surface, and a first length of the handgun as defined by the barrel tip and the rear end of the frame is greater than a second length of the handgun as defined by the barrel tip and the outer surface of the grip safety.
  • 41. The semi-automatic handgun of claim 40, wherein the first length of the handgun as defined by the barrel tip and the rear end of the frame is approximately 6.36 inches and the second length of the handgun as defined by the barrel tip and the outer surface of the grip safety is approximately 6.12 inches.
  • 42. The semi-automatic handgun of claim 41, wherein the frame has a bottom, the slide has a top and a height of the handgun as defined by the bottom of the frame and the top of the slide is approximately 4.65 inches.
  • 43. The semi-automatic handgun of claim 39, wherein the hammer has a firing section connected to a first side support and a second side support and a greatest width of the firing section is located where the firing section is connected to the first and second side supports.
  • 44. The semi-automatic handgun of claim 43, wherein the greatest width of the firing section is approximately 0.30 inches.
RELATED APPLICATIONS

This application claims the benefit of U.S. provisional application No. 60/250,463, filed on Dec. 4, 2000, which is expressly incorporated herein by reference.

US Referenced Citations (15)
Number Name Date Kind
984519 Browning Feb 1911 A
1070582 Browning Aug 1913 A
1376165 Rosebush Apr 1921 A
2324125 Van Horn et al. Jul 1943 A
3492748 Swenson Feb 1970 A
3722358 Seecamp Mar 1973 A
3964368 Zimeri Safie Jun 1976 A
4742634 Swenson May 1988 A
4800665 Schumaker Jan 1989 A
4862618 Szabo Sep 1989 A
5036612 Jennings Aug 1991 A
5086579 Flatley et al. Feb 1992 A
6256918 Szabo Jul 2001 B1
6283006 Szabo et al. Sep 2001 B1
6341442 Szabo et al. Jan 2002 B1
Provisional Applications (1)
Number Date Country
60/250463 Dec 2000 US