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US 5,664,762 AGranted
Automotive screw jack
AssigneeAusco Products, Inc.
InventorThomas D. Rothbauer
Life of this patent
Estimating the term…
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AssigneeAusco Products, Inc.
InventorThomas D. Rothbauer
Estimating the term…
A screw jack (20) includes a stand (21) which houses a side gear (58) which, when rotated, turns a bottom gear assembly (67). An inner screw (73) is connected to the bottom gear assembly (67) and thus turns therewith. Because of an interaction with an outer screw (77), rotation of the inner screw (73) initially causes a tube assembly (24) to move axially relative to a hexagonally shaped sleeve (23). A hex nut (81) is attached to the lower end of the tube assembly (24) to prevent rotation of the tube assembly (24). The nut (81) threadably engages the outer screw (77) and at one stage during the use of the jack (20), the nut (81) also engages a shoulder (82) of the sleeve (23) so that upon continued rotation of the screw (73), the tube assembly (24) and sleeve (23) move axially together. A load bearing assembly (25) is carried at the top of the tube assembly (24) and is adapted to be positioned under the frame or other component of a vehicle to be lifted. When the vehicle is being lifted, the jack (20) is allowed to tilt on selected of feet (48, 49, 50) positioned on the bottom of a base plate (22). The base plate (22) has a plurality of tabs (40) which are folded over edges (37) of a peripheral bottom plate (35) of the stand (21) to attach the base plate (22) to the stand (21). A bearing cup (71) positioned on the base plate (22) receives feet (72) of the bottom gear assembly (67) to floatingly position the bottom gear assembly (67) within the stand (21).
A jack comprising a stand, a first screw generally vertically positioned in and rotatable within said stand, said first screw having external threads, a second screw generally vertically positioned in said stand and having internal threads engaging said external threads of said first screw such that when said first screw is rotated, said second screw is moved vertically, said second screw also having external threads, a tube assembly positioned around said second screw, a nut carried at the axial bottom of said tube assembly having a hexagonal outer configuration and having internal threads engaging said external threads of said second screw, said tube assembly being moveable vertically when said first screw is rotated, and an outer sleeve having a hexagonal configuration and positioned around said nut.
A jack comprising a stand having a peripheral bottom support plate having a plurality of side edges, a base plate for carrying said stand, said base plate having a plurality of tab edges which are foldable over selected of said plurality of said side edges of said support plate so that said support plate is engaged by said base plate, a first screw generally vertically positioned in and rotatable within said stand, said first screw having external threads, a second screw generally vertically positioned in said stand and having internal threads engaging said external threads of said first screw such that when said first screw is rotated, said second screw is moved vertically, said second screw also having external threads, a tube assembly positioned around said second screw, said tube assembly including a multi-sided portion having internal threads engaging said external threads of said second screw, said tube assembly being moveable vertically when said first screw is rotated, and an outer sleeve having the same multi-sided configuration as said portion of said tube assembly and positioned around said portion of said tube assembly.
A jack comprising a stand for housing operating components of the jack, said stand having a bottom support plate having a plurality of side edges, a base plate for caring said stand, said base plate having a plurality of tab edges which are foldable over selected of said plurality of said edges of said support plate so that said support plate is engaged by said base plate.
A jack comprising a stand for housing operating components of the jack, a base plate carrying said stand, said base plate having a bottom surface, and a plurality of feet formed on said bottom surface and adapted to rest on the ground when the jack is in use, said plurality of feet including a first foot, a second foot, and a third foot oriented on said base plate in the form of an isosceles triangle, the shorter side of which is between said second and third feet, said stand being thereby permitted to tilt on selected of said feet when the jack is in use.
A jack comprising a stand for housing operating components of the jack, a plate at the bottom of said stand, a cup positioned on said plate, one of said operating components being a bottom gear assembly, said bottom gear assembly including a plurality of feet downwardly depending therefrom and positioned in said cup to locate said bottom gear assembly relative to said cup, said stand, and said plate.
A jack comprising a stand, a first screw generally vertically positioned in and rotatable within said stand, said first screw having external threads, a bottom gear assembly carrying said first screw, a second screw generally vertically positioned in said stand and having internal threads engaging said external threads of said first screw such that when said first screw is rotated, said second screw is moved vertically, said second screw also having external threads, a tube assembly positioned around said second screw, said tube assembly including a multi-sided portion having internal threads engaging said external threads of said second screw, said tube assembly being moveable vertically when said first screw is rotated, and an outer sleeve having the same multi-sided configuration as said portion of said tube assembly and positioned around said portion of said tube assembly, said stand having a peripheral bottom support plate having a plurality of side edges, a base plate for carrying said stand, said base plate having a plurality of tab edges which are foldable over selected of said plurality of said side edges of said support plate so that said support plate is engaged by said base plate, said base plate having a bottom surface and a plurality of feet formed on said bottom surface adapted to rest on the ground when the jack is in use, said stand being permitted to tilt on selected of said feet when the jack is in use, and a cup positioned on said base plate, said bottom gear assembly including a plurality of feet downwardly depending therefrom and adapted to be positioned in said cup to locate said bottom gear assembly relative to said cup, said stand, and said base plate.
Dependencies are inferred from the claim text.