Regulating devices for hydrostatic drive units

Details Regulating devices for hydrostatic drive units Regulating devices for hydrostatic drive units

1980-07-24

1983-01-25

Croyle, Carlton R.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

91385, 91506, F04B 4900

Patent

active

043701000

ABSTRACT:
A regulating device for a hydrostatic drive unit such as a hydropiston pump is provided with an adjusting piston designed as a differential piston, connected with the final control element of the drive unit and/or the pump and under pressure from both sides, and with a control valve controlling the pressure exerted on the adjusting piston in the pressure spaces in front of the end faces and with a control pressure gauge piston arranged in a sliding manner in the housing and on which the working pressure of the drive unit and/or feed pressure of the pump is exerted, and which lies against a lever, which is connected through a flexible coupling with the adjusting piston and is supported on this latter and is forced against it by a spring and actuates the control valve, in which case the control valve is located in the adjusting piston crosswise to its longitudinal axis, characterized in that the lever is designed as an angle lever and that the spring is located in the adjusting piston and lies against the section of the angle lever extending approximately crosswise to the longitudinal axis of the adjusting piston and is designed as a pressure spring, whose longitudinal axis runs parallel to that of the adjusting piston.

REFERENCES:
patent: 3669570 (1972-06-01), Himmler
patent: 4273517 (1981-06-01), Heyl

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