Speed variator employing friction having an improved friction el

Details Speed variator employing friction having an improved friction el Speed variator employing friction having an improved friction el

1975-11-18

1977-06-14

Scott, Samuel

Machine element or mechanism

Mechanical movements

Grip units and features

F16H 1508

Patent

active

040289524

ABSTRACT:
This invention has for purpose to improve the conditions of the tightening of the friction elements in a speed variator intended in particular to be employed in an automobile vehicle.
It resides mainly in the use of a piston and cylinder assembly as means for pre-tightening the friction elements, this assembly defining a pressure chamber which is connected to the lubrication oil supply pump and to a relatively small-section discharge path. This arrangement permits modulating the pressure of the pre-tightening over a wide range in principle as a function of the temperature of the oil. Preferably, there is also provided a further correction as a function of the speed ratio established in the variator.

REFERENCES:
patent: 2670828 (1954-03-01), McFarland
patent: 2677417 (1954-05-01), Logan et al.
patent: 2743621 (1956-05-01), Beier
patent: 3158036 (1964-11-01), Hughson
patent: 3387507 (1968-11-01), Castelet
patent: 3673882 (1972-07-01), Froumajou et al.
patent: 3690192 (1972-09-01), Bouthers et al.

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