Hydraulic system for accommodating fluid pressure variations

Details Hydraulic system for accommodating fluid pressure variations Hydraulic system for accommodating fluid pressure variations

1997-01-03

1998-01-06

Oberleitner, Robert J.

Expansible chamber devices

With separate biasing means for working member

188170, 92 63, F01B 3100

Patent

active

057042730

ABSTRACT:
A hydraulic system for accommodating fluid pressure variations is provided. The system includes a housing for an actuating piston with the housing having a first end with a hydraulic fluid port and a second end. The actuating piston includes a body portion, having a face, and a rod portion. A first resilient member is confined between the actuating piston and the second end of the housing. A second resilient member is confined between the body portion and the face of the actuating piston. The face of the actuating piston is preferably a pressure accommodating piston which moves relative to the body portion of the actuating piston. Preferably, the second resilient member has a tension force greater than the tension force of the first resilient member. As the actuating piston moves against the bias of the first resilient member toward the second end of the housing in response to hydraulic fluid entering the housing through the fluid port, the movement of the actuating piston is limited by a stop. If there is an increase in hydraulic fluid pressure with the actuating piston in the stopped position, the additional pressure is accommodated by compression of the second resilient member.

REFERENCES:
patent: 546441 (1895-09-01), Vogt
patent: 3382772 (1968-05-01), Kampert et al.
patent: 3557665 (1971-01-01), Von Lewis
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patent: 4072360 (1978-02-01), Carroll et al.
patent: 4350053 (1982-09-01), Folger
patent: 4472995 (1984-09-01), Persson
patent: 4496033 (1985-01-01), Hall et al.
patent: 4609076 (1986-09-01), Collins et al.

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