Swivel based garbage can carousel

Information

  • Patent Grant
  • 6779671
  • Patent Number
    6,779,671
  • Date Filed
    Monday, December 30, 2002
    21 years ago
  • Date Issued
    Tuesday, August 24, 2004
    20 years ago
  • Inventors
  • Examiners
    • Gibson, Jr.; Robert W.
    Agents
    • Tencza, Jr.; Walter J.
Abstract
An apparatus is disclosed comprising a tray which is rotatably connected to a base. The tray can be comprised of a plurality of recesses, wherein each of the plurality of recesses is adapted to receive a corresponding one of a plurality of garbage cans. Each of the plurality of garbage cans can be placed in a corresponding recess so that when the tray is rotated with respect to the base, the position of any of the plurality of garbage cans with respect to the base changes. This allows easy access to the appropriate garbage can such as an open garbage can. One or more handles may be connected to the tray to help rotate the tray.
Description




FIELD OF THE INVENTION




This invention relates to methods and apparatus concerning garbage can storage, organization, and operation.




BACKGROUND OF THE INVENTION




Over the years, recycling has become a growing requirement. With this, comes the need to separate recyclables into garbage cans separate from other garbage. A typical example would be two garbage cans used specifically for recycling glass, cans and plastics. And two garbage cans used for every-day garbage disposal. As any one of the garbage cans become full, one finds himself moving garbage cans around to get to an empty one in the back. This can become very frustrating.




Homeowners today primarily use freestanding garbage cans. With the recycling requirements, many homes may use four or more garbage cans. This can become cumbersome and in inclement weather the situation can get even worse if the homeowner is faced with fallen garbage cans that have been taken by strong winds. Homeowners, often may have to retrieve garbage containers from the street after experiencing heavy winds.




SUMMARY OF THE INVENTION




The present invention in one or more embodiments provides an apparatus comprising a tray, which is rotatably connected to a base. The tray can be comprised of a plurality of recesses, wherein each of the plurality of recesses is adapted to receive a corresponding one of a plurality of garbage cans. Each of the plurality of garbage cans can be placed in a corresponding recess so that when the tray is rotated with respect to the base, the position of any of the plurality of garbage cans with respect to the base changes. Each of the plurality of recesses may have a diameter, which is about the same as a diameter of a body portion of a first garbage can of the plurality of garbage cans. Each of the plurality of garbage cans may be an approximately thirty-gallon garbage can.




First, second, third, and/or fourth handles may be connected to the tray. The tray can be rotated with respect to the base by moving the first, second, third, and/or fourth handles with respect to the base. The first, second, third, and/or fourth handles may be elongated members, each of which may have a length which is about the length of a garbage can.




The present invention in one embodiment includes a method comprising connecting a tray to a base in a manner which allows the tray to rotate with respect to the base; and placing one or more garbage cans into one or more corresponding recesses of the tray.




The present invention, in one or more embodiments, allows easy access to a plurality of garbage cans or containers. In one or more embodiments a swivel-based garbage can organizer permits both the storage and free turning of all containers or garbage cans. The user would be able to easily access any container and each container would also be supported by the garbage can swivel and guarded against tipping over in strong winds or other inclement weather conditions. This invention, in one or more embodiments, will not only allow for efficient, organized garbage disposal, it will also help to keep each container upright in inclement weather.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

shows a perspective exploded view of an apparatus in accordance with an embodiment of the present invention;





FIG. 2

shows a perspective view of a prior art garbage can; and





FIG. 3

shows an assembled perspective view of the apparatus of

FIG. 1

, with a plurality of garbage cans similar or the same as the garbage can in

FIG. 2

, placed in the apparatus of

FIG. 1

;





FIG. 4

shows the positions of the garbage cans of

FIG. 3

when the assembled apparatus of

FIG. 1

has been placed in a second rotational state;





FIG. 5

shows a cross sectional view of a tray and a base for use with another embodiment of the present invention;





FIG. 6

shows a top view of the base of

FIG. 5

;





FIG. 7

shows a perspective view of the tray of FIG.


5


and with attached wheel devices; and





FIG. 8

shows a perspective view of the base of FIG.


5


.











DETAILED DESCRIPTION OF THE DRAWINGS





FIG. 1

shows a perspective exploded view of an apparatus


10


in accordance with an embodiment of the present invention. The apparatus


10


is comprised of a tray


12


, handles


24


,


26


,


28


, and


30


attached or fixed to the tray


12


, a pin


40


, and a base


50


. The base


50


may be comprised of surface


50




a


and edge


50




b


. The base


50


may have an opening


52


. The tray


12


, handles


24


,


26


,


28


, and


30


and the base


50


may be comprised of strong, lightweight, and rust proof material, such as for example, plastic, or polyvinyl chloride (“PVC”).




The tray


12


is comprised of a top surface


12




a


and an edge


12




b


. The tray


12


may be substantially in the shape of a round circular disc with the exception of indentations or recesses


14


,


16


,


18


, and


20


, attachment devices, if any, for handles


24


,


26


,


28


, and


30


, and an opening


22


. The opening


22


may be circular. The tray


12


may have a diameter of D1, which may be about five feet. The indentations or recesses


14


,


16


,


18


, and


20


may be comprised of side walls


14




a


,


16




a


,


18




a


, and


20




a


, respectively. Each of the side walls


14




a


,


16




a


,


18




a


, and


20




a


may have a height of D3, which may be six inches. The height of the side walls


14




a


,


16




a


,


18




a


, and


20




a


may be considered to be the depth of the respective recesses


14


,


16


,


18


, and


20


. Thus the recesses may each have a depth of about six inches. The indentations or recesses


14


,


16


,


18


, and


20


may also be comprised of floors or bases


14




b


,


16




b


,


18




b


, and


20




b


, respectively. The indentations


14


,


16


,


18


, and


20


may each have a diameter of D2, which may be about two feet. The handles


24


,


26


,


28


, and


30


may be fixed to the tray


12


by glue, by screws, or in any other manner. Each of the handles


24


,


26


,


28


, and


30


may be an elongated member such as an elongated solid cylindrical metal or wooden pole or bar. Each of the handles


24


,


26


,


28


, and


30


may have a length L1, shown in

FIG. 1

, which may be approximately equal to the length L2, shown in

FIG. 2

, of the garbage can


100


.




The tray


12


may include, or may have attached or fixed thereto, wheel devices


60


,


62


,


64


,


66


,


68


,


70


, and


72


shown in FIG.


1


and wheel devices


74


,


76


, and


78


shown in FIG.


4


. Two further wheel devices, not shown, may be attached to tray


12


. Any number of wheel devices similar to those shown may be attached to a bottom surface


12




c


of the tray


12


. The wheel devices may be attached or fixed to the bottom surface


12




c


at or near the undersides of the indentations


14


,


16


,


18


, and


20


. Wheel devices


60


,


62


, and a further wheel device may be fixed to the bottom surface


12




c


at or near the underside of indentation


14


. Wheel devices


64


,


66


, and


68


may be fixed to the bottom surface


12




c


at or near the underside of indentation


20


. Wheel devices


70


,


72


, and


74


may be fixed to the bottom surface


12




c


at or near the underside of indentation


18


. Wheel devices


76


,


78


, and a further wheel device not shown may be fixed to the bottom surface


12




c


at or near the underside of indentation


16


. The wheel devices


60


,


62


,


64


,


66


,


68


,


70


,


72


,


74


,


76


, and


78


include brackets


60




a


,


62




a


,


64




a


,


66




a


,


68




a


,


70




a


,


72




a


,


74




a


,


76




a


, and


78




a


, respectively, which are fixed to the bottom surface


12




c


, axels


60




b


,


62




b


,


64




b


,


66




b


,


68




b


,


70




b


,


72




b


,


74




b


,


76




b


, and


78




b


, respectively, and wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, respectively.




The pin


40


may be comprised of portions


42


,


44


, and


46


. The portion


44


may be a cylinder with a diameter of about six inches. The pin


40


may have a hole


40




a


bored through its center. A cylindrical rod


45


may be inserted into the hole


40




a


. The cylindrical rod


45


is partially shown in pin


40


by dashed lines in

FIG. 1

, and partially shown protruding out of pin


40


at ends


45




a


and


45




b


, and the rod has a diameter of ½ to one inch. The hole


40




a


may have a diameter slightly larger than the rod


45


. The rod


45


may be comprised of aluminum or other rust proof material. One end


45




b


of the cylindrical rod


45


may be threaded and may be inserted through opening


52


of the base


50


. The opening


52


may be circular and may have a diameter of D8, which may be slightly greater than the diameter of the rod


45


. A lock nut


58


, adapted to screw onto end


45




b


, can be screwed onto the end


45




b


to fix the rod


45


and the pin


40


to the base


50


. Another end


45




a


of the rod


45


can be inserted through the hole


22


of the tray


12


and thereafter firstly a thrust bearing


57


and lastly a lock nut


56


, both adapted to screw onto end


45




a


, can be screwed onto the end


45




a


to fix the rod


45


and the pin


40


to the tray


12


. The hole


22


may be circular and may have a diameter of D7 which may be the same as the diameter D8 of the base opening


52


. The top portion


42


of the pin may be cylindrical and may have a diameter larger than the opening


22


, so that the tray


12


rests on the top portion


42


. Similarly the bottom portion


46


of the pin


40


may be cylindrical and may have a diameter which is greater than the diameter D8 of the opening


52


. The pin


40


provides sufficient spacing to allow the wheel devices


60


,


62


,


64


,


66


,


68


,


70


,


72


,


74


,


76


, and


78


, and two further wheel devices not shown, to fit between the tray


12


and the base


50


after assembly and during normal operation as shown by

FIGS. 3 and 4

.





FIG. 2

shows a perspective view of a prior art garbage can


100


. The garbage can


100


may be a standard thirty gallon garbage can. The garbage can


100


is comprised of a top portion or lid


102


and a body portion


104


. The lid


102


is comprised of a handle


102




a


, a top surface


102




b


, and a side surface or edge


102




c


. The body portion


104


has a diameter D4 at the bottom


104




a


of the body


104


. The diameter D4 may increase going upwards towards the top


104




b


of the body portion


104


.





FIG. 3

shows an assembled perspective view of the apparatus


10


of

FIG. 1

, with a plurality of garbage cans


100


,


110


,


120


, and


130


similar or the same as the garbage can


100


in

FIG. 2

, placed in the assembled apparatus


10


. Each of the garbage cans


100


,


110


,


120


, and


130


is placed in an indentation of the tray


12


. Garbage cans


100


,


110


,


120


, and


130


are placed in indentations


14


,


16


,


18


, and


20


, respectively. The indentations


14


,


16


,


18


, and


20


have a diameter D2 which in one embodiment, is slightly larger than the diameter D4 at the bottom


104




a


of the body portion


104


of the garbage can


100


. This allows the garbage can


100


to be inserted into the indentation


14


as shown by

FIG. 3

, and also allows the garbage can


100


to be held fairly tightly by the inner wall


14




b


of the indentation


14


. Similarly garbage cans


110


,


120


, and


130


can be inserted into indentations


16


,


18


, and


20


and also can be held fairly tightly by the inner walls


16




b


,


18




b


, and


20




b


, respectively.




The apparatus


10


can be assembled by first inserting the


60




c


, portion


46


of the pin


40


into the opening


52


of the base


50


. Next, the opening


22


of the tray


12


can be placed over the portion


42


of the pin


40


. The tray


12


, in this embodiment, lies on top of and concentric with base


40


when the tray


12


is rotatably connected to the base


50


as in FIG.


3


. When the tray


12


, pin


40


and base


50


have been assembled as in

FIG. 3

, the tray


12


can rotate in either the clockwise direction of R1 or in the counterclockwise direction of R2 with respect to the base


50


.




After the apparatus


10


has been assembled the garbage cans


100


,


110


,


120


, and


130


can be inserted into the indentations


14


,


16


,


18


, and


20


, respectively, as shown by FIG.


3


. Any one or any combination of the handles


24


,


26


,


28


, and


30


can be used to hold rotate the tray


12


with respect to the base


50


.





FIG. 3

shows the positions of the garbage cans


100


,


110


,


120


, and


130


when the tray


12


is at a first rotational position or in a first rotational state with respect to the base


50


.

FIG. 4

shows the positions of the garbage cans


100


,


110


,


120


, and


130


when the tray


12


is at a second rotational position or in a second rotational state with respect to the base


50


. In

FIG. 3

garbage can


100


and indentation


14


are shown on the left side of the page, garbage can


110


and indentation


16


are shown on the top center of the page, garbage can


130


and indentation


20


are shown on the bottom center of the page, and garbage can


120


and indentation


18


are shown on the right side of the page. In

FIG. 4

after rotation of the tray


12


in a clockwise direction R1, garbage can


100


and indentation


14


are now shown at the top center of the page, garbage can


110


and indentation


16


are now shown on the right side of the page, garbage can


120


and indentation


18


are now shown at the bottom center of the page, and garbage can


130


and indentation


20


are now shown on the left side of the page. The rotation of the tray


12


allows one to access a garbage can more easily after one of the garbage cans


100


,


110


,


120


, and


130


has become full. For example, assuming a person would be closest to garbage can


130


in the position of

FIG. 3

, after the garbage can


130


becomes full, rotation of the tray


12


allows the person to access garbage can


120


, which in this example would be empty. After garbage can


120


becomes full, the person can rotate the tray


12


again in the clockwise direction to access garbage can


110


, which in this example would be empty. The present invention in this embodiment thus avoids having to climb over a full garbage can to access and empty one and avoids heavy lifting garbage cans and their contents.




The wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, after assembly as in FIG.


3


, contact the surface


50




a


of the base


50


. The wheels


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, and the wheel devices


62


,


64


,


66


,


68


,


70


,


72


,


74


,


76


, and


78


along with pin assembly


40


bear the load of the tray


12


and the garbage cans


100


,


110


,


120


, and


130


. The wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


can rotate about their respective axel or axis


60




b


,


62




b


,


64




b


,


66




b


,


68




b


,


70




b


,


72




b


,


74




b


,


76




b


, and


78




b


. When the tray


12


is rotated from the position shown in

FIG. 3

to the position shown in

FIG. 4

, the wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, and two further wheels not shown, will rotate to allow the tray to easily move with respect to the base


50


. Without the wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, and two further wheels not shown, or at least some wheels or some other mechanism, the bottom surface


12




c


of the tray


12


would rub against the top surface


50




a


of the base


50


, and this would make it difficult to rotate the tray


12


with respect to the base


50


.




The wheels devices


60


,


62


,


64


,


66


,


68


,


70


,


72


,


74


,


76


, and


78


, and two further wheel devices not shown may swivel with respect to the tray


12


or the wheels devices


60


,


62


,


64


,


66


,


68


,


70


,


72


,


74


,


76


, and


78


, and two further wheel devices may be locked into a certain position so that the wheels


60




c


,


62




c


,


64




c


,


66




c


,


68




c


,


70




c


,


72




c


,


74




c


,


76




c


, and


78




c


, and two further wheel will rotate when the tray


12


is rotated. Each wheel may be allowed to rotate but may be fixed in a direction so that the outer surface of the wheel, such as outer surface


66




d


, is parallel to a straight line tangential to a circular curve defined by the edge


50




b


of the base


50


.





FIG. 5

shows a cross sectional view of a tray


212


(with wheel devices omitted for simplification) and a base


250


for use with another embodiment of the present invention.

FIG. 6

shows a top view of the base


250


of FIG.


5


.

FIG. 7

shows a perspective view of the tray


212


of FIG.


5


and with attached wheel devices


260


,


262


,


264


,


266


,


268


,


270


, and


272


.

FIG. 8

shows a perspective view of the base


250


of FIG.


5


.




The tray


212


may be similar to the tray


12


except as will be described. The tray


212


has indentations


214


,


216


,


218


, and


220


shown by

FIGS. 5 and 7

which are the same as the indentations


14


,


16


,


18


, and


20


, respectively, except that the indentations


14


,


16


,


18


, and


20


have flat surfaces


14




b


,


16




b


,


18




b


, and


20




b


and no holes, while the indentations


214


,


216


,


218


, and


220


, have surfaces which slope downwards towards the base


250


and have an opening or hole at the bottom of the respective indentation. For example, as shown by

FIGS. 5 and 7

, indentation


214


has inner surfaces


214




b


and


214




c


, which funnel or slope downwards towards the opening


214




a


. Similarly indentation


216


has inner surfaces


216




b


and


216




c


, which funnel or slope downwards towards the opening


216




a


, indentation


218


has inner surfaces


218




b


and


218




c


, which funnel or slope downwards towards the opening


218




a


, and indentation


220


has inner surfaces


220




b


and


220




c


, which funnel or slope downwards towards the opening


220




a


. The purpose of the funnels or sloping surfaces is to drain any water that may accumulate in the indentations


214


,


216


,


218


, or


220


. The tray


212


would typically have handles similar or the same as handles


24


,


26


,


28


, and


30


, however handles have been left out of FIG.


5


and

FIG. 7

for simplification of description.




The base


250


in

FIGS. 5

,


6


, and


8


is similar to the base


50


of

FIG. 1

, except that the base


250


has a concave surface


250




a


as shown by FIG.


5


and

FIG. 8

, and the base


250


is attached to a protective wall


202


by a member


204


. The member


204


may be circular and may have a plurality of openings such as opening


204




a


and


204




b


. When water falls through the openings


214




a


,


216




a


,


218




a


, and


220




a


of the indentations


214


,


216


,


218


, and


220


, respectively, it falls onto the surface


250




a


of the base


250


and is directed, as a result of the concave surface


250




a


to the member


204


. The water falls through the openings, such as openings


204




a


and


204




b


, to allow for drainage of the indentations


214


,


216


,


218


, and


220


.




The protective wall


202


may encircle the base


250


and prevent leaves, debris, or animals from going between the tray


212


and the base


250


. The tray


212


and the base


250


can be connected to one another, in the same manner as tray


12


and base


50


. Wheel devices


260


,


262


,


264


,


266


,


268


,


270


, and


272


, as well as five further wheel devices (three for each of indentations


214


,


216


,


218


, and


220


) similar or the same as wheel devices shown in

FIGS. 1

,


3


, and


4


can be attached to the tray


212


, and are omitted in

FIG. 5

merely to simplify description. The garbage cans


100


,


110


,


120


, and


130


can be inserted into indentations


214


,


216


,


218


, and


220


, respectively. The pin


40


along with the other related components in

FIG. 1

can also be used to connect the tray


212


with the base


250


to allow the tray


212


to rotate with respect to the base


250


. The member


204


, in addition to being used for drainage, is used to space the protective wall


202


from the tray


212


, as shown in

FIG. 5

, so that the tray


212


can rotate freely without contacting the wall


202


. Also the spacing by member


204


prevents the wheel devices, such as wheel devices


260


,


262


,


264


,


266


,


268


,


270


, and


272


from contacting the protective wall so that the tray


212


can rotate freely. The base


250


has a centrally located opening


252


and the tray


212


has a centrally located opening


222


for connecting the base


250


to the tray


212


.




Although the invention has been described by reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended to include within this patent all such changes and modifications as may reasonably and properly be included within the scope of the present invention's contribution to the art.



Claims
  • 1. An apparatus comprising:a tray comprised of a plurality of recesses, where each of the plurality of recesses is adapted to receive a corresponding one of a plurality of garbage cans; and a base; wherein the tray is connected to the base in a manner which allows the tray to rotate with respect to the base; and wherein when a first garbage can of the plurality of garbage cans is placed in a first recess of the plurality of recesses, and when the tray is rotated with respect to the base, the position of the first garbage can with respect to the base changes; and further comprising a plurality of wheel devices fixed to a bottom surface of the tray; wherein the plurality of wheel devices have a corresponding plurality of wheels which rotate when the tray is rotated with respect to the base.
  • 2. The apparatus of claim 1 whereineach of the plurality of recesses has a diameter which is about the same as a diameter of a body portion of the first garbage can.
  • 3. The apparatus of claim 2 whereinthe first garbage is an approximately thirty gallon garbage can.
  • 4. The apparatus of claim 1 whereineach of the plurality of recesses has a depth of about six inches.
  • 5. The apparatus of claim 1 whereinthere is at least one wheel device fixed near each recess of the tray.
  • 6. The apparatus of claim 1wherein the plurality of wheels come in contact with and roll on the base.
  • 7. The apparatus of claim 1wherein the base is concave.
  • 8. The apparatus of claim 7 whereinthe base is connected to a member having a plurality of openings; and wherein water can drain from the base and through the openings of the member.
  • 9. The apparatus of claim 1 further comprisinga protective wall which encircles the base.
  • 10. An apparatus comprising:a tray comprised of a plurality of recesses, where each of the plurality of recesses is adapted to receive a corresponding one of a plurality of garbage cans; and a base; wherein the tray is connected to the base in a manner which allows the tray to rotate with respect to the base; and wherein when a first garbage can of the plurality of garbage cans is placed in a first recess of the plurality of recesses, and when the tray is rotated with respect to the base, the position of the first garbage can with respect to the base changes; and further comprising a first handle connected to the tray; and wherein the tray can be rotated with respect to the base by moving the first handle with respect to the base.
  • 11. The apparatus of claim 10 further comprisingsecond, third, and fourth handles connected to the tray; and wherein the tray can be rotated with respect to the base by moving any one of the second, third, or fourth handles with respect to the base.
  • 12. The apparatus of claim 10 whereinthe first handle is an elongated member.
  • 13. The apparatus of claim 12 whereinthe first handle has a length which is about the length of the first garbage can.
  • 14. The apparatus of claim 13 further comprisingsecond, third, and fourth handles connected to the tray; and wherein the second, third, and fourth handles are elongated members.
  • 15. The apparatus of claim 14 whereineach of the second, third, and fourth handles has a length which is about the length of the first garbage can.
  • 16. A method comprising:connecting a tray to a base in a manner which allows the tray to rotate with respect to the base; and placing a first garbage can into a first recess of the tray; and further comprising fixing a plurality of wheel devices to a bottom surface of the tray, wherein the plurality of wheel devices have a plurality of corresponding wheels, and wherein the plurality of wheel devices are fixed so that when the tray is rotated with respect to the base, the plurality of corresponding wheels rotate.
  • 17. The method of claim 16 whereinthe first recess of the tray is adapted to have a diameter which is about the same as a diameter of a body portion of the first garbage can.
  • 18. The method of claim 16 further comprisingplacing a second garbage can into a second recess of the tray.
  • 19. The method of claim 18 whereinthe first recess of the tray is adapted to have a diameter which is about the same as a diameter of a body portion of the first garbage can; and the second recess of the tray is adapted to have a diameter which is about the same as a diameter of a body portion of the second garbage can.
  • 20. The method of claim 16 whereinthe first garbage is an approximately thirty gallon garbage can.
  • 21. The method of claim 18 whereinthe first garbage can is an approximately thirty gallon garbage can; and the second garbage can is an approximately thirty gallon garbage can.
  • 22. A method comprising:connecting a tray to a base in a manner which allows the tray to rotate with respect to the base; and placing a first garbage can into a first recess of the tray; and further comprising connecting a first handle to the tray; and wherein the tray can be rotated with respect to the base by moving the first handle with respect to the base.
  • 23. The method of claim 22 further comprisingconnecting second, third, and fourth handles to the tray; and wherein the tray can be rotated with respect to the base by moving any one of the second, third, or fourth handles with respect to the base.
  • 24. The method of claim 22 whereinthe first handle is an elongated member.
  • 25. The method of claim 24 whereinthe first handle has a length which is about the length of the first garbage can.
CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the priority of U.S. provisional application serial No. 60/424,021, inventor Josephine Varga, filed on Nov. 6, 2002.

US Referenced Citations (9)
Number Name Date Kind
663046 Schaeffer Dec 1900 A
860019 Davis Jul 1907 A
2513630 Elliott Jul 1950 A
2596541 Farguharson May 1952 A
3642145 Shelton Feb 1972 A
3696938 Sherman Oct 1972 A
4545629 Hackett Oct 1985 A
5580015 Baker Dec 1996 A
6494420 Luccero Dec 2002 B2
Provisional Applications (1)
Number Date Country
60/424021 Nov 2002 US