Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...
Patent
1992-01-09
1993-11-23
Denion, Thomas E.
Expansible chamber devices
With guide or seal on cylinder end portion for piston or...
Non-metallic seal means between piston or member and end...
277181, 277 24, 277186, 277189, F16J 1518
Patent
active
052634043
ABSTRACT:
An anti-rotation wiper ring for mounting in a pump equipment gland concentrically to the equipment pump rod, the ring having a wiper lip for preventing debris from being carried on the rod retracting within the equipment. Structure prevents the ring from rotating inwardly toward the rod and possibly outwardly thereafter out of the pump. In one embodiment, the wiper ring flange is held in the gland receiver groove via an anti-rotation anchor on the flange bottom surface mating with a gland locking groove on the bottom surface of the gland receiver groove. Alternatively or additionally, a stabilizer device is formed on the ring ID and prevents the ring's inward rotation. The stabilizer has standoffs to allow the passing rod to glide by while a recession above the standoffs reduces drag. Reliefs between the standoffs harmlessly pass any pressure which may escape the pump piston seal. A static seal keeps a potential leakage path closed in between the wiper ring OD and gland receiver groove ID.
REFERENCES:
patent: 2899938 (1959-08-01), Gardner
patent: 4240643 (1980-12-01), Becker et al.
patent: 4261583 (1981-04-01), de Vries, Jr. et al.
patent: 4425838 (1984-01-01), Pippert
UK Official Search Report--Date of Search 8 Feb. 1993.
Chesterton Hydraulic/Pneumatic Cylinder Seals product circular (1983).
Chesterton Hydraulic/Pneumatic Cylinder Upgrade Program product announcement.
Parker Seals product circular (1989).
Freudenberg-NOK Hydraulic Seals Engineering Manual and Catalog.
Merkel, Die Passende Antwort product circular.
Gaucher John J.
Shannon Daniel
Van Vleet Frank
A. W. Chesterton Company
Denion Thomas E.
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