초록 ▼

The hydraulic jack stand is a hydraulic jack with an integral jack stand. The jack stand helps stabilize and support a heavy object being lifted by the jack. The hydraulic jack stand uses multiple parallel safety mechanisms to prevent the jack from lowering unexpectedly while being used as a jack st

The hydraulic jack stand is a hydraulic jack with an integral jack stand. The jack stand helps stabilize and support a heavy object being lifted by the jack. The hydraulic jack stand uses multiple parallel safety mechanisms to prevent the jack from lowering unexpectedly while being used as a jack stand. The jack uses hydraulic pressure to raise and lower a lifting post. Pivoting teeth arranged along the lifting post allow the lifting post to be raised while preventing the post from falling due to any failure in the hydraulic cylinder. The jack stand has several legs, which extend out to provide a wide base. The legs have feet with non-slip pads underneath to protect the legs from wear and to help prevent the stand from slipping.

대표청구항 ▼

I claim: 1. A hydraulic jack stand, comprising: a lifting post for supporting a heavy object; a hydraulic cylinder for raising and lowering said lifting post; a handle for operating said hydraulic cylinder; one or more teeth pivoted outwardly from said post; a guide support with a surface to engage

I claim: 1. A hydraulic jack stand, comprising: a lifting post for supporting a heavy object; a hydraulic cylinder for raising and lowering said lifting post; a handle for operating said hydraulic cylinder; one or more teeth pivoted outwardly from said post; a guide support with a surface to engage one of said teeth at a time; each said tooth dimensioned and configured to selectively engage said support surface, and support said post and any load thereupon; and a plurality of legs extending from said hydraulic cylinder, such that said legs support said hydraulic cylinder in a stable manner. 2. The hydraulic jack stand according to claim 1, wherein each of said teeth pivotally mounted on said lifting post, are dimensioned such that, when said lifting post is raised, said tooth retracts to allow said lifting post to raise freely, while when said lifting post is lowered, said tooth remains positioned outward from said lifting post, such that said guide support surface may support said tooth and prevent said lifting post from lowering unintentionally; and a means for releasing said guide support to allow said lifting post to be lowered. 3. The hydraulic jack stand according to claim 1, further comprising at least one convex support surface at the top of said lifting post, such that an object to be lifted may rest on said support surface in a stable manner. 4. The hydraulic jack stand according to claim 1, wherein each of said legs further comprise a foot disposed on the bottom end of said leg, said foot providing a flat, horizontal surface on which said leg may rest on the ground in a stable manner. 5. The hydraulic jack stand according to claim 4, wherein said feet further comprise non-slip material pads secured therebeneath, each foot, said pads providing a protective cover for each foot and also preventing said hydraulic jack stand from slipping along the ground during use. 6. The hydraulic jack stand according to claim 1, wherein said guide support is movable horizontally to a tooth engaging position, there further being a handle attached thereto for moving said guide support surface into and out of engagement with a tooth. 7. The hydraulic jack stand according to claim 1, where said support legs are four in number. 8. A hydraulic jack stand comprising a hydraulic cylinder, a post extended from said cylinder and moveable vertically from said cylinder, a movable guide support surface adjacent said post and moveable horizontally with respect thereto, a plurality of moveable teeth in said post, each dimensioned and configured to extend outwardly and engage said support surface, and handle means for moving said support surface selectively beneath one of said plurality of teeth. 9. The hydraulic jack stand according to claim 8, there further being a plurality of support legs associated with and supporting said cylinder. 10. The hydraulic jack stand according to claim 9, wherein said legs are four in number. 11. The hydraulic jack stand according to claim 9, wherein the bottoms of said legs are provided with non-slip material foot pads. 12. The hydraulic jack stand according to claim 8, wherein the upper end of said post includes an integral, symmetrical support block thereupon, for directly engaging a load. 13. The hydraulic jack stand according to claim 12, said support block including at least three support cradles form integrally thereupon. 14. The hydraulic jack stand according to claim 13, said support cradles including a central cradle with two, outboard cradles of smaller dimensions than said central cradle. 15. A hydraulic jack stand, comprising: a lifting post for supporting a heavy object; a hydraulic cylinder for raising and lowering said lifting post; a handle for operating said hydraulic cylinder; one or more teeth pivoted outwardly from said post; a guide support with a surface to engage one of said teeth at a time; each said tooth dimensioned and configured to selectively engage said support surface, and support said post and any load thereupon; a plurality of legs extending from said hydraulic cylinder, such that said legs support said hydraulic cylinder in a stable manner, each of said teeth pivotally mounted on said lifting post being dimensioned such that, when said lifting post is raised, said tooth retracts to allow said lifting post to raise freely, while when said lifting post is lowered, said tooth remains positioned outward from said lifting post, such that said guide support surface may support said tooth and prevent said lifting post from lowering unintentionally; and a means for releasing said guide support to allow said lifting post to be lowered; said legs each including a non-slip material pad on the bottom thereof.