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Class Information
Number: 277/438
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 > Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.) > Having c, u, or v cross-sectional profile
Description: Peripherally radially sealing flexible projection wherein the piston ring has a C-, U-, or V-shape in a view of a vertical plane cutting across the piston ring at right angles to one of its principle horizontal dimensions.










Sub-classes under this class:

Class Number Class Name Patents
277/439 Axially facing cup 48


Patents under this class:

Patent Number Title Of Patent Date Issued
8567788 Motor vehicle brake master cylinder seal Oct. 29, 2013
8398087 Bonded piston seal Mar. 19, 2013
8196603 Valve block assembly Jun. 12, 2012
8141881 Seal and seal arrangement Mar. 27, 2012
7758052 Seal assembly Jul. 20, 2010
7735834 Two-stroke internal combustion engine with oil ring Jun. 15, 2010
7547201 Compact simplified compressor apparatus Jun. 16, 2009
7455506 Injection moldable piston rings Nov. 25, 2008
7322377 Hydraulic accumulator Jan. 29, 2008
7198275 Sealing and replenishment gasket Apr. 3, 2007
7195246 Sealing material Mar. 27, 2007
7140291 Oil-free/oil-less air compressor with an improved seal Nov. 28, 2006
7021632 Self-energized gasket and manufacturing method therefor Apr. 4, 2006
6986407 Sealing assembly for lubricant injector Jan. 17, 2006
6953054 Relief valve Oct. 11, 2005
6938901 Combustion gas seal for injector and sealing structure with the combustion gas seal Sep. 6, 2005
6928922 Lubricating structure for hydraulic driving apparatus Aug. 16, 2005
6786489 Sealing insert, especially for a piston in the hydraulic braking system of a motor vehicle Sep. 7, 2004
6722658 Wiper with integrated seal Apr. 20, 2004
6648335 Metal-to-metal seal assembly for oil and gas production apparatus Nov. 18, 2003
6543784 Wear compensating plunger-and-barrel seal for hydraulic fuel injectors Apr. 8, 2003
6505838 Pressure regulator utilizing pliable piston seal Jan. 14, 2003
6454271 Combined oil ring Sep. 24, 2002
6205908 Piston equipped with piston ring Mar. 27, 2001
6164659 Piston rod seal Dec. 26, 2000
6091175 Self-centering rotor bearing assembly for submersible pump motors Jul. 18, 2000
6065438 Continuous piston rings for an internal combustion engine May. 23, 2000
6062536 Solenoid actuator with sealed armature May. 16, 2000
5833245 Elastomer ring seal for pressurized fluids Nov. 10, 1998
5400927 Liquid/flowable product filling apparatus with seal system Mar. 28, 1995
5328178 Brake master cylinder seal Jul. 12, 1994
5261677 Seal ring Nov. 16, 1993
5169160 Lubricating seal for pneumatic cylinder Dec. 8, 1992
4298562 Method for manufacturing sealing rings Nov. 3, 1981
4244192 Refrigeration system and reciprocating compressor therefor with pressure stabilizing seal Jan. 13, 1981
4045037 Packing Aug. 30, 1977
3953213 Piston construction for fluid power cylinders Apr. 27, 1976











 
 
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