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Class Information
Number: 277/926
Name: Seal for a joint or juncture > Seal including fluid pressure equalizing or balancing feature
Description: Sealing means including means to create a fluid pressure equilibrium at the joint or juncture.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8511219 Zero emissions reciprocating pump Aug. 20, 2013
8474433 Engine braking method and system Jul. 2, 2013
8342202 Pipe coupling member for high-pressure fluid Jan. 1, 2013
8191460 Zero emissions reciprocating pump Jun. 5, 2012
8070008 Sealing plug with a pressure-compensating chamber Dec. 6, 2011
7784395 Zero emissions reciprocating pump Aug. 31, 2010
7743823 Force balanced rotating pressure control device Jun. 29, 2010
7387178 Self relieving seal Jun. 17, 2008
7201241 Self relieving seal Apr. 10, 2007
7083170 Rod or piston primary seal Aug. 1, 2006
6976548 Self relieving seal Dec. 20, 2005
6974387 Blow-molded articles and blow-molding methods for producing them Dec. 13, 2005
6858150 Water processing device with liquid seal Feb. 22, 2005
6739592 Brush seal device May. 25, 2004
6364316 Dual pressure balanced noncontacting finger seal Apr. 2, 2002
6241254 Detachable stationary sealing device Jun. 5, 2001
6196550 Pressure balanced finger seal Mar. 6, 2001
6173962 Brush seal Jan. 16, 2001
6168162 Self-centering brush seal Jan. 2, 2001
6158745 Fluid pressure relief seal for liquid and fluid-tight compartments Dec. 12, 2000
6110045 Hydraulic torque impulse generator Aug. 29, 2000
6105945 Inverted strut damper Aug. 22, 2000
6000701 Labyrinth seal assembly and method Dec. 14, 1999
5799952 Brush seal Sep. 1, 1998
5738358 Extrusion resistant hydrodynamically lubricated multiple modulus rotary shaft seal Apr. 14, 1998
5683278 Stern tube seal with a pressure control system to adjust to the changing draft of ocean-going ships Nov. 4, 1997
5662335 Pressure balanced bellows seal Sep. 2, 1997
5520257 Bit with ball plug compensator having pressure relief means May. 28, 1996
5434748 Hermetic electronic equipment with flexible diaphragm, fastened to case by elastic U-shaped ring, for absorbing pressure fluctuations Jul. 18, 1995
5297996 Rolling or convoluted boot for a constant velocity universal joint with pressure balance being ensured in the joint space Mar. 29, 1994
5251912 Radially energized seal Oct. 12, 1993
5215312 Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening Jun. 1, 1993
5209495 Reciprocating rod pump seal assembly May. 11, 1993
5137284 Stationary seal ring assembly for use in dry gas face seal assemblies Aug. 11, 1992
5118264 Purge flow control in rotary blood pumps Jun. 2, 1992
5058861 Bellows seal and method for assembling Oct. 22, 1991
5052694 Hydrostatic face seal and bearing Oct. 1, 1991
5048981 Modular drop-in sealed bearing assembly for downhole drilling motors Sep. 17, 1991
5015000 Floating seal arrangement May. 14, 1991
4921125 Support assembly May. 1, 1990
4919439 Balanced ring seal Apr. 24, 1990
4903941 Pressure equalizing rotary joint Feb. 27, 1990
4903786 Earth boring bit with improved two piece bearing and seal assembly Feb. 27, 1990
4844480 Pressure sensitive shaft sealing ring Jul. 4, 1989
4795273 Propeller shaft bearing arrangement Jan. 3, 1989
4769992 Reciprocation apparatus with sealing mechanism Sep. 13, 1988
4753304 Volume and pressure balanced rigid face seal for rock bits Jun. 28, 1988
4695062 Pressure relieving sealing rings for rotating elements Sep. 22, 1987
4681327 Compound seal with pressure equalization aperture Jul. 21, 1987
4671368 Earth boring bit with shear compression seal Jun. 9, 1987

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