Machine element or mechanism – Elements – Gear casings
Patent
1982-10-22
1985-06-25
Staab, Lawrence J.
Machine element or mechanism
Elements
Gear casings
74681, 74200, 74190, F16H 1508, F16H 1500, F16H 3706
Patent
active
045246416
ABSTRACT:
Two piston and cylinders 13, 15 and 16, 18 control the force reaction of a roller mounting in a continuously-variable-ratio transmission of the rolling traction type. A pressure control valve 23 controls the net force on the roller mounting by controlling the relative pressure in two pressure lines which include the cylinders. A flow dividing valve 22 equalizes the flows in the lines by feedback across two identical orifices 26, 27. Excessive displacements of the roller mounting (which could cause the rollers to run off their toroidal races) are controlled by ports 19, 20, which are restricted at respective ends of the permissible movement. The restriction causes a pressure build up in the cylinder which resists that threatening the original overshoot, while restricting the effect of the pressure control valve by virtue of the action of the orifices 26, 27 and flow dividing valve 22, and this also reduces the pressure which originally threatened the overshoot.
REFERENCES:
patent: 3570317 (1971-03-01), Kraus
patent: 3739658 (1973-06-01), Scheiter
patent: 3823613 (1974-07-01), Abbott
patent: 3826147 (1974-07-01), Sharpe et al.
patent: 3826148 (1974-07-01), Magill
patent: 3828618 (1974-08-01), Sharpe et al.
patent: 4186616 (1980-02-01), Sharpe
patent: 4272999 (1981-06-01), Perry
patent: 4275610 (1981-07-01), Kraus
Bednarek Michael David
Greer, Jr. Thomas J.
Leyland Vehicles Limited
Staab Lawrence J.
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