The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 1980
Filed:
May. 30, 1978
William D Walther, Kettering, OH (US);
Charles E Phillips, Bryan, OH (US);
Dayton-Walther Corporation, Dayton, OH (US);
Abstract
A semi-trailer landing gear speed reduction mechanism is provided which includes two horizontally disposed parallel spaced shafts with one shaft being rotated by a manual crank means and the other shaft connected to a mechanism for raising and lowering the landing gear. A two speed ratio for the mechanism is provided by having a fixed pair of gears secured to the driven shaft, a pinion gear fixed to the driving shaft and a gear having both internal and external threads supported on its internal threads on the driving shaft and in engagement with a pinion gear on the driven shaft. The drive shaft is axially shiftable between a first position in which the last said gear is free to rotate about the driving shaft and the pinion gear secured to the driving shaft is in driving engagement with a gear on the driven shaft, and a position in which the pinion gear on the driving shaft is in engagement with the internal threads on the floating gear which in turn drivingly engages with its external threads the pinion gear secured to the driven shaft.