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Class Information
Number: 277/482
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 > Circumferentially spaced separately seated radially acting bias feature
Description: Particular piston ring expander wherein the piston ring expander has peripherally spread apart, individually positioned, resilient members acting in a direction perpendicular to the piston"s axis of reciprocation.

Sub-classes under this class:

Class Number Class Name Patents
277/483 Disposed in socket or about pin 5

Patents under this class:

Patent Number Title Of Patent Date Issued
6575472 System for sealing relatively movable elements Jun. 10, 2003
6502826 Hydraulic cylinder piston seal Jan. 7, 2003
6340160 System for sealing relatively movable elements Jan. 22, 2002
6199868 Piston assembly with piston ring support and sealing member Mar. 13, 2001
5039060 Control valve vibration damper/isolator Aug. 13, 1991
4079949 Integral spring piston ring Mar. 21, 1978

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