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Class Information
Number: 277/496
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 > Split single piece piston ring having opposed asymmetrical mirrored ends
Description: Piston ring wherein the piston ring is an annulus including only a gap providing opposed ends that are of substantially identical shape having opposite orientation.










Sub-classes under this class:

Class Number Class Name Patents
277/497 Arcuate or beveled mating surfaces 14


Patents under this class:

Patent Number Title Of Patent Date Issued
8459655 Sealing device Jun. 11, 2013
8454024 Seal ring Jun. 4, 2013
8348280 Seal apparatus Jan. 8, 2013
8262091 Scarf cut backup rings Sep. 11, 2012
8157268 Piston for internal combustion engines Apr. 17, 2012
7869737 Developer cartridge, developing device and image forming apparatus Jan. 11, 2011
7766339 Seal ring Aug. 3, 2010
7654536 Seal ring Feb. 2, 2010
7341256 Seal ring Mar. 11, 2008
7165772 Self-locking seal ring Jan. 23, 2007
7121552 Piston ring Oct. 17, 2006
6962343 Seal ring Nov. 8, 2005
6863277 Piston ring for the piston of a vibration damper Mar. 8, 2005
6726218 Compression piston ring for use in internal combustion engine Apr. 27, 2004
6719297 Piston ring, in particular for a piston of a vibration damper Apr. 13, 2004
6485026 Non-stainless steel nitrided piston ring, and method of making the same Nov. 26, 2002
6450295 Feed screw device Sep. 17, 2002
6397987 Dashpot piston in halves Jun. 4, 2002
5876040 Reusable one piece low pressure seal Mar. 2, 1999
5865443 Seal ring Feb. 2, 1999
5836589 Sliding member for use with lightweight metal Nov. 17, 1998
5618048 Piston ring seal having angled ends Apr. 8, 1997
5513857 Piston sealing ring having interlocking ends May. 7, 1996
4881455 Piston for use in a gas pump Nov. 21, 1989
4189161 Bi-directional ring gap seal Feb. 19, 1980
4050702 Segmented sealing structure Sep. 27, 1977











 
 
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