Machine element or mechanism – Gearing – Interchangeably locked
Patent
1978-05-30
1980-02-12
Nerbun, Peter
Machine element or mechanism
Gearing
Interchangeably locked
254 86R, F16H 322, B60S 904
Patent
active
041877330
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.
REFERENCES:
patent: 2747422 (1956-05-01), Walther
patent: 3010699 (1961-11-01), McKay
patent: 3632086 (1972-01-01), Mai
patent: 3892141 (1975-07-01), Phillips, Jr. et al.
Phillips Charles E.
Walther William D.
Dayton-Walther Corporation
Nerbun Peter
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