Screw jack assembly
AssigneeAndrew Taylor
InventorCHARLES BARTEE
Life of this patent
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Abstract
A screw jack assembly (10) for a towed vehicle (100) has a spring housing (30) and a leg section (20) (which may be fitted with a castoring jockey wheel (120) or foot (130) in telescopic relationship, and a compression spring (40) is compressed so that the position of the spring housing (30) relative to weight indicating indicia (20) on the leg section (20) can indicate the tongue weight of the towed vehicle (100). By locking the spring housing (30) and leg section (20) together, a crank shaft (50) can move a main housing (80) relative to the leg section (20) to enable the assembly (60) to raise and lower the vehicle (100) in the manner of a conventional screw jack assembly.
Claims12
A screw jack assembly for a vehicle, including:
- a leg section mountable at a lower end on a foot or jockey wheel;
- a spring housing, having a tubular body, mountable on the vehicle, the tubular body having a cap at one end and being in co-axial telescopic arrangement with an upper end of the leg section at a second end of the tubular body;
- at least one compression spring within the tubular body of the spring housing and interposed between the cap and the upper end of the leg section;
- and
- weight indicating indicia on the leg section adjacent the second end of the tubular body of the spring housing;
- so arranged that:
- a weight applied to the spring housing by the vehicle causes compression of the at least one compression spring;
- whereby relative movement of the second end of the tubular body of the spring housing to the weight indicating indicia provides a measurement of the weight.
Dependencies are inferred from the claim text.