Variable speed transmission

Machine element or mechanism – Gearing – Plural power paths to and/or from gearing

Patent

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Details

F16H 344

Patent

active

048670120

ABSTRACT:
Differential-gearing devices are disclosed in which the differential pinion gears are controlled to induce a speed difference between output shafts, provide a locking and limited slip differential to equalize the speeds of the output shafts or limit their speed difference, provide a clutch for controlling the coupling and uncoupling of an input shaft to an output shaft, and provide a variable speed transmission. These operational modes are implemented by mounting hydraulic motor or pump units on the rotating carrier of the differential apparatus, the pinion gears being fixed to the shafts of the respective units. A controllable external fluid source independent of the carrier is in fluid communication with the units via conduits through the stationary housing of the differential device and the rotating carrier. Fluid flow may be either blocked, limited or unimpeded between the source and the units to effect the desired control of the pinion gears to, in turn, determine the operational mode of the apparatus.

REFERENCES:
patent: 937321 (1909-10-01), Munsing
patent: 1000406 (1911-08-01), Heller
patent: 1196820 (1916-09-01), Snyder
patent: 1243611 (1917-10-01), Kemper
patent: 1285585 (1918-11-01), Bair
patent: 1953551 (1934-04-01), Bullock
patent: 3320830 (1967-05-01), Fowell
patent: 3394620 (1968-07-01), Tormolen

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