Hydraulic speed control arrangement for an infinitely variable t

Details Hydraulic speed control arrangement for an infinitely variable t Hydraulic speed control arrangement for an infinitely variable t

1982-08-16

1985-02-26

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

741905, B60K 4116, F16H 1500

Patent

active

045011729

ABSTRACT:
A constant output speed control arrangement for an infinitely variable transmission whose ratio of transmission is controllable by a hydraulic control fluid wherein the transmission output shaft has a fluid displacement pump associated therewith and connected to a control valve structure including a piston disposed in a cylinder and being movable by the control fluid from the pump against the force of a spring with a control passage extending through the piston and a control opening in the cylinder providing communication with a hydraulic ratio control structure in the transmission, the control opening being so arranged relative to the piston that the control opening is closed by the piston when the piston is moved against the spring force by an excess amount of control fluid supplied by the pump so as to cause a transmission ratio change for a decrease of the transmission output shaft, and the control opening is opened by the piston when the piston is returned by the spring for admitting an increased amount of control fluid to the transmission thereby causing an increase in the transmission output shaft speed.

REFERENCES:
patent: Re24892 (1960-10-01), Banker
patent: 2485126 (1949-10-01), Wood
patent: 4086820 (1978-05-01), Kraus
patent: 4369675 (1983-01-01), van Deursen

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