Expansible chamber devices – Piston – Plural integral radially extending resilient metallic...
Patent
1994-05-13
1995-07-25
Look, Edward K.
Expansible chamber devices
Piston
Plural integral radially extending resilient metallic...
92240, 92250, 277170, F16J 900, F16K 4100
Patent
active
054352339
ABSTRACT:
A piston for use in a hydraulic cylinder which is subject to sudden and extremely high shock load pressures and high temperature operating conditions is provided with a plurality of interlocking axially-spaced circumferential grooves. A relatively thin, flat washer of heat-formable fluoropolymer is snapped over a retaining ring integral with the piston and the piston is then moved axially through a heated hot-forming cylinder, causing the washer to conform to the cylindrical shape of the piston. At least one circumferential groove has a side wall which is undercut relative to its cylindrical surface to provide a locking angle. Preheating the washer prior to hot-forming the band and forming a sloping ramp in opposition to the undercut side wall result in improved flow of the fluoropolymer toward the undercut side wall. An additional advantage of the preheating is the formation of an improved band skirt with an improved, sharply-defined sealing edge.
REFERENCES:
patent: 1584470 (1926-05-01), Quintez
patent: 1797781 (1931-03-01), McCaughey
patent: 2176281 (1939-10-01), Stillwagon
patent: 2216577 (1940-10-01), Stillwagon
patent: 2779646 (1957-01-01), Creed
patent: 3072071 (1963-01-01), Stroud
patent: 3212411 (1965-10-01), Stroms
patent: 3237953 (1966-03-01), Lucas
patent: 3730305 (1973-05-01), Fouts
patent: 5345860 (1994-09-01), Bowell
Look Edward K.
Nguyen Hoang
TRI Dayton, Inc.
Weigl William
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