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US 12,623,892 B1Granted
Safety jack
OwnerDavid W. Stecker, Sr.inventor
Life of this patent
Estimating the term…
Abstract
The safety jack includes a base and a piston jack mounted on the base. The piston jack includes a base tube mounted on the base. A threaded rod within the base tube has a portion extending above the base tube, where the threaded rod is free to move up and down within the base tube. A nut on the portion of the threaded rod extends above base tube, and a jack saddle is connected to a top of the piston and a top of the threaded base. The nut can be screwed down onto a top of the base tube so as to prevent the jack saddle from being lowered.
Claims18
A safety jack, comprising:
- a piston jack to raise an object, the piston jack including a piston and a bottom on the piston jack;
- a safety support to support the raised object, the safety support comprising a uniform base tube, a threaded rod, and a threaded stop nut;
- the base tube having a top and a bottom and an inner surface;
- the threaded rod movable within the base tube and having a portion of the threaded rod extending above the top of the base tube, wherein movement of the threaded rod within the base tube is unrestricted by the inner surface of the base tube;
- the threaded stop nut rotatably connected on the portion of the threaded rod extending above the top of the base tube;
- a jack saddle fixedly secured to a top of the piston and a top of the threaded rod, and the bottoms of the piston jack and the base tube are located on a substantially similar horizonal plane;
- and
- wherein the threaded stop nut can be screwed down onto the top of the base tube so as to prevent the piston of the piston jack from being lowered after the piston is raised.
5 more elements
A safety jack, comprising:
- a piston jack having an inner tube, a bottom, a top surface, and a unitary piston having at least a portion within the inner tube, wherein an upper portion of the piston has a threaded surface and a lower portion of the piston has a smooth surface, and wherein movement of the threaded surface of the unitary piston within the inner tube is unrestricted by and can slide adjacent to an inner surface of the inner tube of the piston jack;
- an O-ring around a groove portion of the smooth surface on the lower portion of the piston so as to provide an airtight seal between the smooth surface on the lower portion of the piston below the O-ring and the inner tube of the piston jack;
- a threaded stop nut on the threaded surface of the upper portion of the piston above the top surface of the piston jack;
- and
- wherein screwing the threaded stop nut down so as to contact the top surface of the piston jack prevents the piston from being lowered after being raised.
2 more elements
A safety jack, comprising:
- a planar base;
- a piston jack to raise an object, the piston jack including a piston and a bottom on the piston jack;
- a safety support to support the raised object, the safety support comprising a base tube, a threaded rod, and a threaded stop nut;
- the base tube having a top and a bottom and an inner surface, the base tube around the threaded rod, and a portion of the threaded rod extending below the bottom of the base tube, and wherein movement of the threaded rod within the base tube is unrestricted by the inner surface of the base tube;
- the threaded stop nut rotatably movable on the portion of the threaded rod extending below bottom of the base tube;
- a jack saddle secured to a top of the piston and the top of the base tube;
- and
- wherein the threaded stop nut can be screwed up below the bottom of the base tube so as to prevent the piston of the piston jack from being lowered after the piston is raised.
5 more elements
Dependencies are inferred from the claim text.