Latching device and method

Information

  • Patent Grant
  • 6543820
  • Patent Number
    6,543,820
  • Date Filed
    Friday, March 2, 2001
    23 years ago
  • Date Issued
    Tuesday, April 8, 2003
    21 years ago
Abstract
The present invention provides a latch device and method for securing a panel such as a door panel to a frame. The latch device has a housing mounted to the door panel with a catch having a contact portion pivotally mounted in the housing for rotation about a first axis while a handle assembly is mounted in the housing for rotation about a second axis. A strike is mounted on the frame such that the strike can receive the catch. The handle assembly is moveable between a first position where the contact portion of the catch is urged into contact against the strike and second position where the catch is retracted from the strike. A link is pivotally mounted to the catch at one point and to the handle assembly at a second point. An adjustment device is provided. The latch device also has a compliance element that absorbs forces resulting from the engagement of the latch assembly.
Description




FIELD OF THE INVENTION




The present invention relates generally to latching devices and more particularly to latch assemblies for fastening hinged doors, panels and the like.




BACKGROUND OF THE INVENTION




Various latches are known, including a number of latch assemblies which are operable for securing two panels or a panel against a corresponding frame. In certain applications such as in the case of doors or panels which need to be sealed when closed, such as for example, refrigerator doors, these latching assemblies are advantageously employed. Generally, latches of this type are mounted proximate to the edges of the first panel and on engagement are adapted to compress the first panel against the corresponding second panel or frame and into a secured position. These assemblies are generally actuated by the operator exerting a force on a handle. In such instances, the latch is mounted on the door or panel to be secured, proximate to the periphery. Often a compressible gasket will be provided between the door or panel of the corresponding frame or cabinet, particularly in the context of a refrigerator door.




A disadvantage of some known latching devices is that the latch itself does not provide a positive indication of when the door is fully latched. Another problem with many known latch designs is that the gasket may be made of silicon or PVC which tends to absorb moisture and freeze making the gasket more difficult to compress (“stiffen”). Ice accumulates on the gasket, obstructing the seal and contributing to gasket compression difficulties. As a result of the change in gasket compression, a greater force may be required to operate the latch and compress the first panel against the corresponding second panel or frame and into the secured position which can exceed conventional latch's load limits.




Another problem with many prior art designs is that if the first panel becomes misaligned with the corresponding second panel or frame due to manufacturing defects or normal wear, the latch may be unable to accommodate the misalignment and become inoperable. Due to the misalignment, the panels or frame must be physically aligned, requiring costly maintenance visits.




Thus, there is a need for latching assembly which makes it easy to secure the latch and seal a door to a frame. Similarly, there is a need for latching assembly which seals the door to the frame even when the gasket is obstructed by foreign bodies or the gasket is hardened and difficult to compress. Also, there is a need for an latch assembly that is tolerant of misalignment and may be adjusted horizontally and/or vertically allowing operation even though the panel or door upon which the assembly is mounted is misaligned.




These needs are met by the present invention, as hereinafter described.




SUMMARY OF INVENTION




The present invention provides a latching assembly mountable on a panel for securing the panel to a frame. The latching assembly of the present invention can provide greater mechanical advantage when the latching assembly is closed or open, in comparison with prior art assemblies, permitting refrigerator and freezer doors to be easily and reliably latched and sealed when misalignment occurs or the gasket compression is compromised. The latching assembly of the present invention also can provide enhanced security in comparison with prior art devices, because the assembly in some embodiments provides a key lock and slots where a padlock may be inserted. The key lock and padlock may be used in conjunction with one another or separately to prevent the latch assembly from opening.




In one aspect, the present invention provides a latch device and method for securing a panel to a corresponding second panel or frame. The latch device has a housing mounted to a panel and a catch having a contact portion pivotally mounted in the housing for rotation about a first axis while a handle assembly is mounted in the housing for rotation about a second axis. A strike is mounted on the panel or frame such that the strike can receive the catch. The handle assembly is moveable between a first position where the contact portion of the catch is urged into contact against the strike and second position where the catch is retracted from the strike. The latch device also has a link pivotally mounted to the catch at one point and to the handle assembly at a second point.




In another aspect of the invention, the latch device comprises an adjustment device for modifying a compressive force applied by the latch between a first panel and corresponding second panel.




In another aspect of the invention, the latch device comprises a compliance element that absorbs forces resulting from the engagement of the latch assembly.




There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described below and which will form the subject matter of the claims appended hereto.




In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein, as well as the abstract included below, are for the purpose of description and should not be regarded as limiting.




As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is an exploded perspective view of the latch assembly.





FIG. 2

is a side view of the engaged door latch showing the catch in an engaged, fully raised position.





FIG. 3

is a side view of the door latch showing the latch assembly moving from the engaged position to a disengaged position.





FIG. 4

is a side view of the door latch showing the catch in a disengaged, fully lowered position.





FIG. 5

is partial side view of an alternative embodiment of the latch assembly.





FIG. 6

is a partial side view showing an alternative embodiment of the catch and an adjustment screw.





FIG. 7

is a partial side view of an alternative embodiment of the catch.





FIG. 8

is a top view showing a latch installed on a refrigerator door.











DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION





FIG. 1

illustrates a door latch assembly


10


having a cover plate


12


, a catch


36


and a base


50


. The cover plate


12


is attached to an outward support


14


via machine screws


60


. The pivot pin


20


has a first and second end and the first end is inserted vertically through the structural washer


16


into a circular slot


15


of the outward support


14


. The structural washer


16


is spot welded to the outward support


14


to resist contact stress of pivot pin


20


. The second end of the pivot pin


20


is inserted through the bushing


22


into the center slot


23


of the driving link


24


. The bushing


22


is coupled with the driving link


24


adapting the driving link


24


for receiving and retaining the pivot pin


20


and enabling the driving link


24


to rotate about the pivot pin


20


in a circular motion.




A handle


38


is integral to the driving link


24


. The handle


38


and driving link


24


rotate about the pivot pin


20


with a swing angle of 60 degrees. A force may be exerted onto the handle


38


by a user causing the driving link


24


to rotate about the pivot pin


20


. The second end of the pivot pin


20


penetrates the center slot


23


of the driving link


24


and inserts through a second structural washer


40


into the base


50


.




A key lock


11


is provided adjacent to the driving link


24


for prohibiting the driving link


24


from rotating about pivot pin


20


when the key lock


11


is activated (locked). The key lock


11


may be activated when the latch assembly is engaged, locking the catch


36


in the receptacle


45


of the strike


44


. In addition to the key lock


11


, engagement of the latch assembly


10


may be locked by insertion of a padlock through the cylindrical slots


13


,


25


of the driving link


24


and base


50


respectively. A padlock (not shown) may be used as an alternative to the key lock


11


or in conjunction with the key lock


11


.





FIG. 1

further shows an intermediate link


34


having a first end and a second end. The first end is pivotally attached to the driving link


24


via the center link pin


18


which inserts into a cylindrical bore


19


of the driving link


24


. The center link pin


18


is coupled with bushings


21


enabling the intermediate link


34


to rotate about the center link pin


18


. The second end of the intermediate link


34


is pivotally attached to the catch


36


by a center link pin


58


and bushings


57


. The bushings


57


allow the catch


36


rotate about the center link pin


58


.




A center pin


28


is inserted through a cylindrical pivot portion of the catch


36


where a first end penetrates the structural washer


26


and engages the outward support


14


. A second end of the center pin


28


penetrates the structural washer


17


and engages the base


50


, thus attaching the catch


36


to the outward support


14


and base


50


.




In one embodiment, the catch


36


extends 2-4 inches horizontally away from the from the center pin


28


and is provided with a vertical end that extends upwardly and allows for one hand operation of the door latch assembly


10


. In this embodiment, the catch


36


has an 4 inch extension that allows for convenient engagement of the latch assembly


10


and enables the catch


36


to engage the strike


44


even when the gasket is obstructed by foreign bodies. These dimensions are by way of example only and do not limit other embodiments of the invention, which may be dimensioned differently. The examples of dimensions are provided to illustrate that some embodiments of the invention can provide a greater extension or reach, than some prior art latches.




The catch


36


has a cylindrical screw thread


42


where an adjustment-screw


52


may be inserted. The adjustment screw


52


may be a micro-screw having fine threads. Upon insertion of the adjustment-screw


52


, the adjustment-screw may be adjusted to contract or expand the horizontal distance between the strike


44


and the catch


36


so as to increase or decrease the contact force between the catch


36


and strike


44


when the latch is latched, as described in more detail below.




The strike


44


as shown in

FIG. 1

has a receptacle end


45


in which the catch


36


may be inserted and has a total of four mounting screws


54


for mounting the strike


44


. The strike


44


has a slot


59


which aligns with an adjustment screw housing having a bore


42


when the catch


36


is inserted into the strike


44


. The slot


59


permits extension of a tool or hex key into the bore


42


. The mounting screws


54


, are housed in horizontal slots located on the strike


44


. In the embodiment of

FIG. 1

, the mounting screws


54


, provide horizontal positioning ability of the strike


44


with respect to the base


50


. Additionally, the mounting screws


80


, allow for vertical positioning adjustment of the base


50


relative to the strike


44


. The aforementioned positioning adjustment ability of the strike


44


and base


50


allows for reception of the catch


36


when the base


50


and the strike


44


are misaligned due to manufacturing faults of the panels on which the base


50


and strike


44


are mounted or to correct excessive misalignment that may occur during useful life of product.




The intermediate link


34


is operable via exertion of a force upon the handle


38


causing the driving link


24


to rotate about the pivot pin


20


. The action of the driving link


24


in turn causes the intermediate link


34


to rotate about the center link pin


18


. This rotation of the intermediate link


34


displaces the catch


36


relative to the strike


44


causing the latch assembly


10


to engage or disengage.




Referring to

FIGS. 2-4

, it will be seen that just prior to closing and latching the door, the latch will be in the position shown in FIG.


4


. As the user pushes the door shut, the user simultaneously pushes on the end of the handle and the latch transitions into the intermediate position shown in FIG.


3


. The user continues to push on the door handle until the latch assumes the position fully latched shown in FIG.


2


. In the operation, the latch assembly


10


is engaged due to a force exerted upon the handle


38


, the intermediate link


34


is operable to displace the catch


36


, rotating the catch


36


about the center pin


28


to the fully raised position and inserting the catch


36


into the strike


44


.




In the fully latched position, the catch


36


has the adjustment screw


52


abutting against the inside of the strike


44


. It is possible to rotate the adjustment screw


52


to move the head of the screw inward or outward relative to the catch. This will adjust the relative contact location of the catch. In effect, this adjustment adjusts the final latching position. In the final latching position, the compressive force secures the latch in the closed position due to a reversal of the internal force of inter link


34


acting on drive link


24


after pin


18


rotates through the “deadpoint” that occurs when pins


20


,


18


&


58


are co-linear. The adjustment screw


52


provides essentially two results from the adjustment. First, the adjustment screw provides the ability to accommodate for tolerances and misalignments between the door and the frame. Second, for a given installation, the adjustment of the adjustment screw will affect the amount of the compressive latching force that is distributed through the latch assembly


10


.




Rotation of the adjustment screw


52


may be effected in any expedient matter. For example, the screw may be threaded into a throughbore that passes completely through the catch


36


so that the head of the screw is exposed at one end, and the opposite end of the screw is exposed via the bore or a no-head set screw is used. The opposite end of the adjustment screw may have a slot or a Phillips head slot, or a hex slot, or any suitable surface that can be rotated by insertion of a tool into that end of the bore to rotate the screw. Alternatively, the user can simply access the head of the adjustment screw


52


and rotate it directly. This adjustment can of course be performed when the door is opened or closed.




If the screw is able to be rotated from the end opposite the head, it is possible in some embodiments to effect the adjustment when the door is latched by removing the cover plate


12


and positioning the screwdriver through the slot


59


to reach the end of the screw


52


opposite the head via the bore


42


.




To open the door, the user pulls on the handle


38


in the position of

FIG. 2

, to transition the handle through the position shown in

FIGS. 3 and 4

respectively. Exerting a force upon the handle


38


opposite that which is required to engage the latch assembly


10


will cause the intermediate link


34


to displace the catch


36


, rotating the catch


36


to the fully lowered position and extracting the catch


36


from the receptacle end


45


causing the latch assembly


10


to disengage.




It can be seen that opening and unlatching the door can be accomplished with a single one-handed motion if desired. Also, closing and latching the door can be accomplished with a single one-handed motion.




The range of rotation of the catch


36


about the center pin


28


is limited at the fully raised position (shown in FIG.


1


and

FIG. 2

) by contact between the drive link


24


and mounting bolt


80


and/or intermediate link


34


and drive link


24


. The range of rotation at the fully lowered position (shown in

FIG. 4

) is limited by contact between the drive link


24


and stop


84


and/or the drive link


24


with intermediate link


34


. When the latch assembly


10


is engaged and the catch


36


is in the fully raised position, the handle


38


is positioned at a 90 degree angle to horizontal as shown in FIG.


2


. Conversely,

FIG. 4

illustrates the handle


38


pivoted 60 degrees from the position of the handle


38


shown in

FIG. 2.

, where the latch assembly


10


is disengaged and the catch


36


is in the fully lowered position so that the handle


38


is positioned at a 30 degree angle to horizontal.





FIG. 2

illustrates the latch assembly engaged including the center intermediate link


34


and the center link pin


18


. The center intermediate link


34


is pivotally coupled at one end to the driving link


24


. The handle is positioned at a 90 degree angle causing the center link pin


18


to pass through the deadpoint. Consequently, internal forces acting on the drive link


24


reverse direction to secure assembly


10


latched into the locked position. As a result, the catch


36


is in the fully raised position and inserted into the receptacle


45


of the strike


44


and the door seal clamping force prevents unassisted opening. The catch


36


is shown in contact with the strike


44


and the adjustment-screw housing


42


is aligned with slot the


59


. Slot


59


allows tool clearance to adjust screw


52


in latched position. In addition, because the over-center linkage is in the locked position, rightward pressure on the handle


38


is required to disengage the door latch assembly


10


, thereby reducing the chances of accidental disengagement of the catch


36


. The amount of closing travel is limited by contact between driving link


24


and displacement stop


84


or driving link


24


and center link


34


. As depicted in

FIG. 2

, the latch assembly generally operates according to a four-bar linkage characteristic. A first bar linkage (A) is shown extending between the pivot pin


20


and the center link pin


18


. A second bar linkage (B) extends along the shaft of the center intermediate link


34


between the center link pin


18


and the center pin


58


. A third bar linkage (C) extends between the center link pin


58


and the center pin


28


. A fourth bar linkage (D) which forms a base of the four bar linkage extends between the center pin


28


and the pivot pin


20


.




The catch


36


is released by pulling upward on the handle


38


which causes the driving link


24


to rotate counter clockwise and in turn pulls downward on the pivot linkage of the center intermediate link


34


.

FIG. 3

shows the door latch assembly moving from an engaged to disengaged position. The handle


38


is rotating counter clockwise from its


90


degree position illustrated in

FIG. 2

along the 60 degree swing angle. Due to the movement displayed, the driving link


24


rotates displacing the center link pin


18


through the deadpoint. At that moment internal forces acting on drive link


24


reverse direction allowing assembly


10


to open freely. Continued counter clockwise rotation of drive link


24


displaces the center link and rotates catch


36


about the center pin


28


, disengaging the catch


36


from the strike


44


.





FIG. 4

shows the door latch assembly


10


disengaged. The handle


38


is positioned at a 30 degree angle to horizontal and the center linkage is located below the deadpoint and the catch


36


is disengaged. There are no forces acting on latch (except gravity) when the catch is not engaged and compressing the door seal.




The angular dimensions given in this application with respect to the handle are by way of example only. Depending on the dimensions of the various elements of the latch, any of a wide range of angles may be employed so that the catch is able to be engaged and retracted from a striker


44


. Also, although a separate strike element is illustrated in a preferred embodiment, it will be appreciated that the strike and latch assembly


10


may be inverted such that the strike is attached to door frame and latch assembly attached to cabinet. One preferred embodiment of the invention is used as a latch for a refrigerator door. However, the latch may be suitable for latching other doors to frames, and may also be employed to latch two panels together.




Due to the post-deadpoint positioning of the assembly when in the latched position, the user is provided with a positive tactile, and in some embodiments audible, indication that the door is securely fastened in the latched position. This provides a significant advantage of the invention by which the user in some embodiments can with a single hand motion push the door closed, latch the door, and receive a feedback that the door is latched. Moreover, the deadpoint latching feature tends to retain the latch in the latched position, so that minor unintentional bumping of the handle will not release the handle undesirably. Also due to the latching feature, when it is desired to open the door, the user is provided with similar indication of overcoming the deadpoint position, and in some embodiments the user can in one motion unlatch and open the door.




The resistance to unintentional opening, and the positive indication of a latched or unlatched state, provided by the above described latch is a significant advantage of the invention. For example, when the latch is used on a door of a refrigerator for medical or experimental samples, it can be very important that these samples be retained within the closed refrigerator for an extended period of time. Therefore, ensuring that the door is closed and that it does not accidentally open can be very beneficial. Some embodiments of the invention provide this by virtue of the positive latching feature.




In an alternative embodiment shown in

FIG. 5

, a compliance member


70


is provided to permit some lateral compliance between the driving link


24


and the contact part of catch


36


with the strike


44


. The compliance member


70


may be a spring, elastomer or any other resilient component. As illustrated in

FIG. 5

, the center intermediate link


34


may include a compliance member


70


permitting expansive or contractive movement relative to the driving link


24


due to the addition of the compliance member


70


. The aforementioned adaptation will absorb some or all of the compressive and expansive forces created when the catch


36


is inserted into the strike


44


, which without a compliance member


70


may cause the door latch assembly


10


to fail when engaged. This allows the catch to engage the strike when the gasket is obstructed by foreign bodies which otherwise would reduce the reach of the catch


36


and therefore hinder engagement of the catch


36


. In addition, the compliance mechanism may prevent overload of the latch due to expansive forces due to ice build-up on the gasket.





FIG. 6

illustrates an exploded sectional view of the catch


36


and adjustment screw housing


42


with the adjustment screw


52


inserted, and shows an alternative embodiment in which the micro-screw housing


42


has been fitted with a compliance member


72


permitting some axial travel of the adjustment screw


52


relative to the catch


36


. In the preferred embodiment, the compliance member


72


is a helical spring preloaded to the latching force, held by a retaining clip


88


. This compliance member


72


also may be a spring, elastomer or any other resilient member. The compliance member


72


will absorb some or all of the excessive compressive forces created when the catch


36


is inserted in the strike


44


. Rotation of the adjustment screw


52


in the housing


42


will modify these internal forces when the catch


36


is in the fully raised position.





FIG. 7

illustrates an alternative embodiment of the catch


36


in which the sectional portion of the catch which engages the strike


44


itself has a compliance member such as a leaf spring


74


. The leaf spring


74


permits some lateral travel within the catch


36


relative to the micro screw


52


. The leaf spring


74


will absorb some or all of the compressive forces created when the catch


36


is inserted into the strike


44


and the catch is locked. In addition the leaf spring


74


can extend the reach of the catch


36


. This allows the catch to engage the strike


44


when the gasket is obstructed by foreign bodies which would otherwise reduce the reach of the catch


36


and therefore hinder engagement of the catch


36


.





FIG. 8

is a sectional elevation view of the latch assembly attached to a refrigerator door


76


, illustrating an example of a door resistance beginning at 2 inches. In this example, the latch of the invention effectively engages at 1.25 inches while prior latches engage at 1 inch. Once engaged, the latch assembly maintains a 0.625 inch compression of the gasket


78


. These dimensions are by way of example only.




The many features and advantages of the invention are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the invention which fall within the true spirits and scope of the invention. Further, since numerous modifications and variations will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.



Claims
  • 1. A latch assembly adapted for mounting on a door panel and securing said door panel to a frame, the latch assembly comprising:a base adapted to be mounted to the door panel; a catch pivotally mounted to said base for rotation about a first axis and having a contact portion; a strike adapted for mounted to said frame so that said strike can receive said catch; a handle pivotally mounted to said housing for rotation about a second axis; a link pivotally mounted to said catch at a first point and to said handle at a second point, said handle moveable between a first position where said contact portion of said catch is urged into contact against said strike via said link and a second position where said catch is retracted from said strike via said link; first oblong holes on said strike that provide horizontal adjustment of said strike; and second oblong holes on said base that provide vertical adjustment of said base, and wherein said panel and frame are of sheet metal construction and said base has a surface area that distributes load from said base to said sheet metal.
  • 2. A latch assembly according to claim 1, wherein said link comprises a link member and said latch assembly forms a four bar linkage.
  • 3. A latch assembly according to claim 2, further comprising a resilient compliance element that absorbs forces between said contact portion of said catch and said handle assembly.
  • 4. A latch assembly according to claim 1, further comprising an adjusting device on said catch that adjusts said contact portion of said catch.
  • 5. A latch assembly according to claim 1, wherein said adjustment device is a rotatable, threaded member mounted on said catch that adjusts said contact portion of said catch.
  • 6. A latch assembly according to claim 5, further comprising a compliance element that absorbs forces between said adjusting device and said catch.
  • 7. An adjustment device according to claim 5, wherein said adjustment device comprises a rotatable, threaded member mounted on said catch.
  • 8. A latch assembly according to claim 1, further comprising a lock for locking said handle into said first position.
  • 9. A latch assembly according to claim 1, further comprising a first aperture on said base and a second aperture on a driving link for insertion of a padlock to lock said handle in said first position.
  • 10. A latch assembly adapted for mounting on a door panel and securing said panel to a frame, said latch assembly comprising:a base adapted to be mounted to said door panel; a catch pivotally mounted to said base for rotation about a first axis and having a contact portion; a strike adapted for mounting to said frame so that said strike can receive said catch; a handle pivotally mounted to said base for rotation about a second axis, said handle moveable between a first position where said contact portion of said catch is urged into contact against said strike and a second position where said catch is retracted from said strike; an adjusting device on said catch that adjusts said contact portion to said catch; first oblong holes on said strike that provide horizontal adjustment of said strike; and second oblong holes on said base that provide vertical adjustment of said base, and wherein said panel and frame are of sheet metal construction and said base has a surface area that distributes load from said base to said sheet metal.
  • 11. A latch assembly according to claim 10, wherein said adjustment device comprises a rotatable, threaded member mounted on said catch that adjusts said contact portion of said catch.
  • 12. A latch assembly adapted for mounting a panel and securing said panel to a frame, said assembly comprising:a base adapted to be mounted to said panel; a catch pivotally mounted to said housing for rotation about a first axis; a strike adapted for mounting to said frame so that said strike can received said catch; a handle assembly pivotally mounted to said housing for rotation about a second axis, said handle assembly moveable between a first position where a portion of said catch is urged into contact against said strike with a contact force, and a second position where said catch is retracted from said strike; first oblong holes on said strike that provide horizontal adjustment of said strike; second oblong holes on said base that provide vertical adjustment of said base, and wherein said panel and frame are of sheet metal construction and said base has a surface area that distributes load from said base to said sheet metal; and a compliance mechanism that absorbs at least port of the contact force.
  • 13. A latch assembly according to claim 12, where said compliance mechanism absorbs over compression forces which peak at a dead point and overload forces when said door seal is unusually stiffened by ice or other foreign material.
  • 14. A latch assembly according to claim 12, wherein said compliance element comprises a resilient link between said handle assembly and said catch.
  • 15. A latch assembly according to claim 12, wherein said compliance element comprises an elastomeric portion of said catch.
  • 16. A latch assembly according to claim 12, wherein said compliance element is a leaf spring.
  • 17. A method for latching a door to a frame using a catch received in a strike, comprising the steps of adjusting a contact point of the catch with the strike;horizontally adjusting the strike via first oblong holes; vertically adjusting via second oblong holes, a base adapted to be mounted on said door; and urging the catch against the strike by moving a handle.
  • 18. A method according to claim 17, wherein the adjusting step includes rotating a threaded contact member that is threaded into bore of the catch.
  • 19. A method of latching a door to a frame using a catch received in a strike, comprising the steps of:urging the catch against the strike by using a handle; horizontally adjusting the strike via first oblong holes; vertically adjusting via second oblong holes, a base adapted to be mounted on said door; and absorbing at least part of a contact force between the catch and the strike with a compliance element when the handle is urging the catch against the strike.
  • 20. A method according to claim 19, wherein the absorbing step is performed by a resilient link between the handle assembly and the catch.
  • 21. A method according to claim 19, wherein the absorbing step is performed by an elastomeric portion of the catch.
  • 22. A latch assembly for latching a door to a frame comprising:a strike; a catch adapted to be received in said strike; means for adjusting a contact point of said catch with said strike; means for urging the catch against the strike by moving a handle; means for horizontal adjustment of said strike; and means for vertical adjustment of a base adapted to be mounted on said door.
  • 23. A latch assembly according to claim 22, wherein said adjusting means includes a threaded contact member that is threaded into a bore of said catch.
  • 24. A latch assembly for latching a door to a frame comprising:a strike; a catch adapted to be received in said strike; means for urging the catch against the strike by using a handle; means for absorbing at least part of a contact force between said catch and said strike when the handle is urging the catch against the strike; means for horizontal adjustment of said strike; and means for vertical adjustment of a base adapted to be mounted on said door.
  • 25. A latch assembly according to claim 24, wherein the absorbing means comprises a resilient link between the handle assembly and the catch.
  • 26. A latch assembly according to claim 24, wherein the absorbing means comprises an elastomeric portion of the catch.
CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority of provisional patent application serial No. 60/256,547 entitled Door Latch filed Dec. 18, 2000, in the name of Allan D. Kelly, the disclosure of which is hereby incorporated by reference.

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Provisional Applications (1)
Number Date Country
60/256547 Dec 2000 US