Double-acting piston

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

92244, 277165, F16J 1532

Patent

active

041263197

ABSTRACT:
The double-acting measuring piston of this invention is slidably positioned in a cylinder and is provided with oppositely disposed mirror image sealing members which encompass a supporting body and are retained in abutment therewith by spaced flanges. The sealing members have foil lip portions that form between them, the cylinder wall and the supporting body an annular pressure chamber. The mirror image sealing members have oppositely disposed surface areas that are subjected to chambers containing a medium pulsating at slight pressure differences.

REFERENCES:
patent: 2315012 (1943-03-01), Park
patent: 2884903 (1959-05-01), Pauly
patent: 3509890 (1970-05-01), Phillips
patent: 3605706 (1971-09-01), Bush
patent: 4042248 (1977-08-01), Williamitis

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