Mechanism for selectively locking swingably mounted wheel assemblies
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B62B-001/04
B62B-001/00
B62B-007/00
B62D-021/14
A47C-003/02
A47D-007/00
출원번호
US-0705067
(2003-11-10)
발명자
/ 주소
Waldman,Kenneth
Drobinski,Jerry
출원인 / 주소
Simplicity, Inc.
대리인 / 주소
Volpe and Koenig, P.C.
인용정보
피인용 횟수 :
9인용 특허 :
17
초록▼
A support frame having a plurality of wheeled assemblies, mounted at corners of the support frame, each wheeled assembly including a substantially identical mechanism for extending and retracting a respective wheel assembly. Each mechanism has a locking member which includes a locking portion for se
A support frame having a plurality of wheeled assemblies, mounted at corners of the support frame, each wheeled assembly including a substantially identical mechanism for extending and retracting a respective wheel assembly. Each mechanism has a locking member which includes a locking portion for selectively engaging locking apertures on a rotatable member which rotatably supports the wheel assembly. Each mechanism also includes a grip, spaced from the locking member, to facilitate rotation of the rotatable member and the respective wheel assembly between extended and retracted positions when the locking portion is disengaged from the locking apertures. When each wheel assembly is in an extended position, the support frame is able to roll on a suitable surface. Each wheel assembly is also capable of being retained in a retracted position housed within a recess in its associated housing.
대표청구항▼
What is claimed is: 1. A support frame comprising a plurality of wheeled assemblies and at least one support member, each of the wheeled assemblies mounted near corners of the support frame, and each of the wheeled assemblies including: a housing having a first end for receiving the at least one su
What is claimed is: 1. A support frame comprising a plurality of wheeled assemblies and at least one support member, each of the wheeled assemblies mounted near corners of the support frame, and each of the wheeled assemblies including: a housing having a first end for receiving the at least one support member; a rotatable member, mounted in said housing for rotation about a first axis, and having at least first and second locking apertures; a wheel assembly, having a support shaft engaging the rotatable member and being movable with rotation of said rotatable member; and a locking member having a locking portion and being movably mounted on said housing between a first position in which said locking portion is engaged with said rotatable member and a second position displaced from said rotatable member, whereby the rotatable member is prevented from rotation when the locking portion extends into one of said locking apertures. 2. The support frame according to claim 1, wherein the plurality of wheeled assemblies consists of four wheeled assemblies, and one of each of the wheeled assemblies is positioned at one of each of four corners of the support frame. 3. The support frame according to claim 2, wherein each of the wheel assemblies further includes a control member, inserted into the rotatable member; and said control member having a control grip which extends beyond an adjacent exterior surface of the housing, said grip facilitating rotation of its associated wheel assembly. 4. The support frame according to claim 3, wherein each of the wheel assemblies further includes a shaft extending into the rotatable member and the control member, and wherein the wheel assembly is rotatable about said shaft about a second axis. 5. A wheeled assembly for supporting a transportable unit, the assembly comprising: a housing having a first end for attachment to a transportable unit and a second end for receiving a rotatable member; the rotatable member defining at least first and second locking apertures positioned at spaced apart locations about its outer surface and a receiving channel positioned apart from said apertures, and is mounted in said housing for rotation about a first axis; a wheel assembly, having a support shaft engaged in said receiving channel of said rotatable member; and a movable locking member that includes a locking portion, and is mounted on said housing for selective engagement with one of the first and second locking apertures to position the wheel assembly in a desired position when the rotatable member is rotated about the first axis. 6. The wheeled assembly according to claim 5, wherein the locking portion of the locking member includes a projection aligned substantially perpendicular to the first axis when inserted into one of the locking apertures. 7. The wheeled assembly according to claim 5, wherein the locking member further includes at least one detent, and wherein the housing includes at least two detent apertures which cooperate with the at least one detent to selectively lock the locking portion in said first and second locking apertures. 8. The wheeled assembly according to claim 5, wherein the rotatable member further includes a stop, which engages a lip provided on said housing to prevent the rotatable member from further rotation in a given direction. 9. The wheeled assembly according to claim 5, wherein said wheel assembly is retracted into a recess in said housing when the locking portion is inserted in said first locking aperture. 10. The wheeled assembly according to claim 9, wherein said wheel assembly is extended out of said recess when the locking portion is inserted in said second locking aperture. 11. The wheeled assembly according to claim 5, wherein the locking member further includes a knob which carries said locking portion and a flange connected to the locking portion, and wherein the wheeled assembly further comprises a spring positioned between said flange and said housing to provide a force to urge the locking portion toward said rotatable member. 12. The wheeled assembly according to claim 11, wherein the housing further includes a hollow integral extension having a rim, located on an exterior surface of the housing, which receives the locking member, wherein the spring is contained between the rim and the flange. 13. The wheeled assembly according to claim 5, wherein the locking member further includes a first end which carries said locking portion, a second end which has a cavity, said locking member being pivoted about a pivot axis located between the first and second ends, a spring positioned between said cavity and said housing to provide a force to urge the locking portion toward said rotatable member. 14. The wheeled assembly according to claim 13, further comprising a seat, located on an exterior surface of the housing, which houses and pivotably supports the locking member. 15. The wheeled assembly according to claim 13, wherein the rotatable member rotates independently from the locking member. 16. The wheeled assembly according to claim 5, further comprising a control member, inserted into the rotatable member; and said control member having a control grip which extends beyond an adjacent exterior surface of the housing, said grip facilitating rotation of the wheel assembly. 17. The wheeled assembly according to claim 16, wherein the locking member is mounted along a first exterior surface of the housing. 18. The wheeled assembly according to claim 17, wherein said adjacent exterior surface is substantially perpendicular to the first exterior surface. 19. The wheeled assembly according to claim 16, wherein the wheel assembly includes a shaft extending into the rotatable member and the control member. 20. The wheeled assembly according to claim 19, wherein the rotatable member further includes a hollow protrusion for receiving said shaft. 21. The wheeled assembly according to claim 19, wherein the wheel assembly is rotatable. 22. The wheeled assembly according to claim 21, wherein the wheel assembly further includes a wheel stop to prevent rotation of a wheel of the wheel assembly.
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이 특허에 인용된 특허 (17)
Huang Li-chu C. (No. 9 ; Alley 2 ; Lane 606 ; Sec. 2 ; Po-ai Rd. Chiayi City TWX), Baby rocking carriage.
Dumoulin ; Jr. Joseph C. (6334 Hampden Taylor MI 48180), Cooler with fold-down corner wheels, a pop-up pull handle, integral bottle and fold down cutting board.
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