[특허]Locking leveling support legs for wheelbarrow

Davis,Larry E.

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Locking leveling support legs for wheelbarrow

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62B-001/18 B62B-001/00
미국특허분류(USC)	280/047.31; 280/047.33; 280/047.131
출원번호	US-0825248 (2004-04-15)
발명자 / 주소	Davis,Larry E.
출원인 / 주소	Davis,Larry E.
인용정보	피인용 횟수 : 5 인용 특허 : 17

초록
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An improved leg means providing leveling support for a wheelbarrow resting on un-level ground. As wheelbarrow is lowered to resting position, a center pivoting cradle leg member having left and right leg-feet portions depending downward and laterally outward from under each side of wheelbarrow undercarriage touchable to ground. The cradle leg member is supported by an axle passing through a vertical elongated slot in a yoke member than passing through the cradle leg member center between left and right feet portions. The slotted yoke member is affixed onto wheelbarrow undercarriage. The axle support provides for up and down and seesaw action of cradle leg member. Further lowering of the wheelbarrow will settle it down against the cradle legs which are now graduated to slope of ground. A fixed locking pin member at center of undercarriage supporting will mesh with a toothed locking gear portion of the cradle leg support. The wheelbarrow is now resting supported by the cradle legs at the level which it was released. When lifting wheelbarrow manually, the cradle leg will drop down unlocked and unsupporting, resting at bottom of the vertical slot in yoke member. Wheelbarrow is now being supported by its wheel and user.

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What is claimed: 1. A wheelbarrow including a cargo tub portion and undercarriage elongate handles supporting the tub portion; comprising: a leveling self-locking leg support mechanism, a cupped yoke adapted to support a cradle leg member; said cupped yoke comprising vertically oriented spaced apart front and rear flange walls, a connecting floor, and at least one elongate vertical slot disposed along a center face of at least one of said yoke flange walls; a permanently stationary pin adapted to lock said cradle leg member, wherein said pin is located above said at least one elongate slot; said spaced apart flange walls of said cupped yoke extending upwardly and being secured to a part of said undercarriage elongate handles; said cradle leg member including left and right ground supporting feet, a center upwardly extending edge having a plurality of spaced apart teeth along said edge, and an axle adapted to laterally support said cradle-leg member; said axle located within said at least one elongate vertical slot; said cupped yoke cooperating with said axle to provide lateral support for said cradle leg member; said at least one elongate vertical slot allowing up and down movement of said cradle leg axle, thus allowing automatic meshing and un-meshing of said spaced apart teeth with said pin. 2. The wheelbarrow as described in claim 1, wherein said flange walls define and substantially limit the yaw and pitch of said cradle leg member. 3. The wheelbarrow as described in claim 2, wherein said flange walls allow up and down movement as well as rotation of said cradle-leg member about said axle, thereby providing a see-saw leveling of said cradle leg member. 4. The wheelbarrow as described in claim 3, said at least one elongate slot substantially limiting lateral displacement of said cradle leg member. 5. The wheelbarrow as described in claim 4, wherein said axle of said cradle leg member is affixed at a right angle thereto; said axle being oriented along a longitudinal axis of said wheelbarrow; said axis being located substantially below said handles. 6. The wheelbarrow as described in claim 5, said axis being translatable along said at least one elongate slot, thereby providing vertical movement of said cradle leg member. 7. The wheelbarrow as described in claim 1, said axle being elevated up from said connecting floor when said wheelbarrow handles are manually released by a user; said elevation of axle causing said teeth of the cradle leg member to mesh with said pin, thereby automatically locking the cradle-leg member with and relative to the cupped yoke. 8. The wheelbarrow as described in claim 1, wherein a downward movement of said cradle-leg member results from the handles of said wheelbarrow being manually supported by a user; said downward movement disengaging said teeth from said pin and allowing said cradle-leg member to rest on said connecting floor.

이 특허에 인용된 특허 (17)

이 특허를 인용한 특허 피인용횟수: 5

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Locking leveling support legs for wheelbarrow

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이 특허에 인용된 특허 (17)

이 특허를 인용한 특허 피인용횟수: 5

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Locking leveling support legs for wheelbarrow

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이 특허에 인용된 특허 (17)

이 특허를 인용한 특허 피인용횟수: 5

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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