Thumb wheel for a jack

Details Thumb wheel for a jack Thumb wheel for a jack

1990-12-05

1992-02-04

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Screw

Geared

254DIG3, B66F 318

Patent

active

050854062

ABSTRACT:
A jack (11) is provided with a thumb wheel (10) preferably made of a plastic material. The jack (11) includes a side gear having an end (20) extending out of a side gear housing (18). The housing (18) has an outer peripheral lip (19) which is engaged by the thumb wheel (10). The thumb wheel (10) includes a plate (24) having an aperture (26) therein of a configuration complementary to that of the side gear end (20) so that when the thumb wheel (10) is positioned on the jack (11), the side gear end (20) will be within the aperture (26) and will rotate upon rotation of the plate (24). The thumb wheel (10) also includes a collar (30) having a plurality of slots (33) therein and a circumferential barb (31) near the end thereof. Upon installing the thumb wheel (10), the collar (30) flexes and the barb (31) snaps over and engages the lip (19) on the housing (18). The engagement is only in the axial direction such that the thumb wheel (10) will freely rotate with respect to the housing (18).

REFERENCES:
patent: 1593217 (1926-07-01), Lucker
patent: 1600058 (1926-09-01), Morrison
patent: 2107715 (1938-02-01), Runyan et al.
patent: 2895363 (1959-07-01), Cox
patent: 3245446 (1966-04-01), Morifuji
patent: 3884282 (1975-05-01), Dobrosielski
patent: 4979355 (1990-12-01), Ulevich

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