Machine element or mechanism – Elements – Gear casings
Patent
1976-09-15
1978-07-04
Herrmann, Allan D.
Machine element or mechanism
Elements
Gear casings
74191, F16H 3706, F16H 1516
Patent
active
040981452
ABSTRACT:
The invention contemplates an improved mechanical traction drive providing a single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as an internal-combustion engine. The transmission involves a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive, a stop or a reverse drive of the output shaft. For the particular disclosed form, provision is made for automatic downshifting reaction to increasing load, and major axial-reaction forces are self-contained by rotating mechanism, thus (a) avoiding substantial axial force components on main-bearings of the mechanism, and (b) reducing to very small magnitudes the requisite force for selective control actuation.
REFERENCES:
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patent: 2560180 (1951-07-01), Lesueur
patent: 2818751 (1958-01-01), Jorgensen
patent: 2883883 (1959-04-01), Chillson
patent: 3203278 (1965-08-01), General
patent: 3299743 (1967-01-01), Stockton
patent: 3365982 (1968-01-01), Floyd
patent: 3633430 (1972-01-01), Bentley
patent: 3695120 (1972-10-01), Titt
patent: 3793910 (1974-02-01), Nasvytis
Chandler Lance W.
Herrmann Allan D.
Textron Inc.
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