Gear box for rack and pinion jack and method of making same

Implements or apparatus for applying pushing or pulling force – Vehicle attached jack – Attached to trailer tongue

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Details

254425, 254427, 254 95, 254 96, 254 97, B60S 902

Patent

active

048487350

ABSTRACT:
A tongue mounted rack and pinion jack for a trailer wherein a pair of die-cast gear box segments are bolted together for supporting a handle driven worm gear and a pinion gear in self-contained bearing surfaces formed in the gear box segments. When the gear box segments are secured together a gear box, a rack receiving passage and a leg receiving passage are formed therein. A common wall formed in the molded gear box segments separates the gear box from the rack receiving passage and has a window formed therein through which teeth on a pinion gear extend into the rack receiving passage and engage teeth on a rack extending longitudinally through the rack receiving passage and secured to a leg extending through the leg receiving passage.

REFERENCES:
patent: 1304358 (1919-05-01), Norlund
patent: 1324721 (1919-12-01), Benedict
patent: 1850513 (1932-03-01), Murphy
patent: 3466011 (1969-09-01), Hewes, Jr. et al.
patent: 3921958 (1975-11-01), Brockelsby
patent: 3934852 (1976-01-01), Weber et al.
Fulton Manufacturing Corporation; Milwaukee, Wis., "Trailer Jacks, Owner's Manual, Model No. 650 and 675", Hammerblow Jacks, Rack & Gear Type.

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