Mounting for a screw jack

Details Mounting for a screw jack Mounting for a screw jack

1991-10-22

1992-12-29

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Vehicle attached jack

Attached to trailer tongue

254424, B66F 310

Patent

active

051745500

ABSTRACT:
A screw jack incorporating a quick retract mechanism to permit movement of the jack into engagement with the ground such that only limited rotation of the screw is necessary for elevating the tongue of a trailer for disengaging a coupler on the trailer from a trailer hitch. The screw-type jack incorporates an improved handle which is rotatable about a horizontal axis between an active position for rotating the screw about a vehicle axis and a stowed position wherein the handle engages the body of the jack to prevent rotation of the screw. A support for the screw jack which incorporates improved versatility such that it can be interchangeably used on other jacks and can be used in applications involving uneven and/or non-level surface conditions.

REFERENCES:
patent: 2539897 (1951-01-01), Davey et al.
patent: 2970810 (1961-02-01), Zich et al.
patent: 3851855 (1974-12-01), Douglass
patent: 4316601 (1982-02-01), Osborne et al.
patent: 4784369 (1988-11-01), Bock

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