Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor
Patent
1997-08-29
1999-09-21
Oen, William
Seal for a joint or juncture
Seal between relatively movable parts
Piston ring or piston ring expander or seat therefor
F16J 1536, F16J 1554
Patent
active
059543434
ABSTRACT:
A seal ring to be disposed between two surfaces to sealingly isolate a clearance therebetween into radially inner and outer portions, the seal ring (45) comprisinig a first ridge portion (51) extending through the entire circumference on the first side (46) for sealingly contacting the first surface at a first radial position, and a second ridge portion (52) extending through the entire circumference on the second side for sealingly contacting the second surface at a second radial position different from the first radial position. The seal ring may a generally wave-shaped or S-shaped cross section or include a soft material layer on its surface. The seal ring (65) may also comprise a projection (62) extending from the inner circumference surface of the seal ring in substantially radially inner direction for elastically engaging with a member disposed in the innter circumferential portion of the seal ring.
REFERENCES:
patent: 4580796 (1986-04-01), Bronson
patent: 5544897 (1996-08-01), Di Pietro et al.
Fukutomi Norihisa
Sumida Mamoru
Mitsubishi Denki Kabushika Kaisha
Oen William
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