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Class Information
Number: 277/474
Name: Seal for a joint or juncture > Seal between relatively movable parts (i.e., dynamic seal) > Piston ring or piston ring expander or seat therefor > Particular piston ring expander > Annular expander nested in annular groove of the piston ring > And contacting surfaces therebetween are complementary
Description: Particular annular piston ring expander wherein the piston ring expander provides an annular surface complementary to the opposing annular recess surface of the piston ring.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7429047 |
Piston ring assembly |
Sep. 30, 2008 |
| 6454271 |
Combined oil ring |
Sep. 24, 2002 |
| 6267384 |
Thin 3-piece oil ring |
Jul. 31, 2001 |
| 6113107 |
Self-lubricated and-adjusted piston ring |
Sep. 5, 2000 |
| 5964467 |
Oil control ring of two piece type for internal combustion engine |
Oct. 12, 1999 |
| 5014603 |
Hydraulic actuator having frangible or deformable components |
May. 14, 1991 |
| 4652000 |
Sealing system for high pressure gas applications |
Mar. 24, 1987 |
| 4566703 |
Seal assembly |
Jan. 28, 1986 |
| 4553564 |
Valve |
Nov. 19, 1985 |
| 4210338 |
Piston ring assembly |
Jul. 1, 1980 |
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