Fluid reservoir device with fill means, level indicator means an

Details Fluid reservoir device with fill means, level indicator means an Fluid reservoir device with fill means, level indicator means an

1974-10-21

1977-01-04

Haroian, Harry N.

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

92 62, 92 63, 1374925, F16L 5504

Patent

active

040007588

ABSTRACT:
A fluid reservoir device for use in conjunction with fluid-filled systems, such as helicopter blade dampers, comprises a cylindrical chamber wall closed across its bottom by a mounting shank having a fluid inlet opening formed therethrough. A first piston is slideably mounted within the cylindrical chamber wall and spring biased downwardly therein, and a second piston is slideably mounted in the first piston, and is spring biased downwardly therein, the combined work surfaces of the first and second pistons closing the cylindrical chamber wall wherein a chamber is defined having a volume which varies according to the positions of the first and second pistons. The chamber is filled by moving the first piston (and the second piston mounted therein) upwardly, and the first piston is spring biased downward to force fluid from the chamber to the fluid-filled system as required. If additional fluid is forced from the fluid-filled system into the chamber, it is accommodated by driving the second piston upwardly to increase the volume of the chamber. Fluid escape means comprises a fluid escape passage normally blocked by a spring biased piston which lifts under excessive pressure to bleed fluid from the chamber, thereby relieving the excessive pressure condition.

REFERENCES:
patent: 1450893 (1923-04-01), Morrow
patent: 2469794 (1949-05-01), Sloan
patent: 3815628 (1973-08-01), Ferrill

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