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Class Information
Number: 277/361
Name: Seal for a joint or juncture > Seal between relatively movable parts (i.e., dynamic seal) > Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) > Multiple sealing faces (e.g., double seals, etc.)
Description: Sealing face member including more than one pair of sealing faces.










Sub-classes under this class:

Class Number Class Name Patents
277/364 Concentric and radially spaced 60
277/362 Floating intermediate sealing face member 51
277/368 Housing mounted sealing face members biased axially away from each other 34
277/369 Housing mounted sealing face members biased axially towards each other 74
277/366 Shaft mounted sealing face members biased axially away from each other 55
277/367 Shaft mounted sealing face members biased axially towards each other 47
277/365 Three or more 50


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8622779 Driveshaft sealing for a marine propulsion system Jan. 7, 2014
8511689 Shaft sealing apparatus Aug. 20, 2013
8506266 Sealing system assembly for high pressure fluid handling devices Aug. 13, 2013
8388328 Rotary pump and brake device in which rotary pump is provided Mar. 5, 2013
8382121 Double mechanical seal device Feb. 26, 2013
8251301 Rotating fluid jet with improved rotary seal Aug. 28, 2012
8215644 Shaft sealing device Jul. 10, 2012
8113545 Rotary joint Feb. 14, 2012
7905493 Sealing system assembly for high pressure fluid handling devices Mar. 15, 2011
7845740 Unitized seal with integral spacer Dec. 7, 2010
7726658 Driven seal assembly for rotary drive shaft of motor Jun. 1, 2010
7713040 Rotor shaft sealing method and structure of oil-free rotary compressor May. 11, 2010
7600700 Rotating fluid jet with improved rotary seal Oct. 13, 2009
7334799 Sealing device for a turbocharger Feb. 26, 2008
7329106 Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle Feb. 12, 2008
7229076 Mechanical seal Jun. 12, 2007
7144015 Modular gas seals cartridge Dec. 5, 2006
7014192 Multistage shaft sealing apparatus Mar. 21, 2006
6959929 Seal for a compressor and centrifugal compressor equipped with such a seal Nov. 1, 2005
6789804 Dry gas shutdown seal Sep. 14, 2004
6783193 Rotary pump and braking apparatus using rotary pump Aug. 31, 2004
6685192 Tandem seal Feb. 3, 2004
6504888 Apparatus and methods of flow measurement for a boiling water reactor internal pump Jan. 7, 2003
6474652 Shaft seal device Nov. 5, 2002
6471214 Tandem axial face seal for pumps for cryogenic media Oct. 29, 2002
6454268 Shaft seal device Sep. 24, 2002
6446975 Seal arrangement Sep. 10, 2002
6416057 Brush seal Jul. 9, 2002
6406028 Seal stack Jun. 18, 2002
6371259 Drum brake structure for a wheel of all-terrain vehicle Apr. 16, 2002
6357751 PROTECTIVE ELEMENT FOR A SEALING ARRANGEMENT WITH AT LEAST ONE SEALING RING, SEALING ARRANGEMENT WITH SUCH A PROTECTIVE ELEMENT AS WELL AS METHOD FOR KEEPING AWAY DIRT PARTICLES FROM SUCH A SE Mar. 19, 2002
6343793 Dual channel rotary union Feb. 5, 2002
6325381 High-pressure rotary seal Dec. 4, 2001
6305692 Seal device Oct. 23, 2001
6293374 Drum brake seal structure for all-terrain vehicle wheel Sep. 25, 2001
6273428 Annular seal assembly, in particular for the drive shaft of a vehicle Aug. 14, 2001
6273527 Rotary pump with better fluid sealing structure and brake apparatus having same Aug. 14, 2001
6224061 Mechanical seals May. 1, 2001
6224060 Pump gas seal with particle exclusion device May. 1, 2001
6182971 Gas seal for pumps Feb. 6, 2001
6173963 Sealing assembly for an inlet valve of a power nailer Jan. 16, 2001
6070880 System for lubricating mechanical seals Jun. 6, 2000
6062815 Unitized seal impeller thrust system May. 16, 2000
6007068 Dynamic face seal arrangement Dec. 28, 1999
5954341 Bellows seal with drive collar for reverse pressure capability Sep. 21, 1999
5941531 Double gas seal having an improved bellows arrangement Aug. 24, 1999
5938205 Method and apparatus for optimizing barrier fluid flow for promoting cool running of a cartridge dual seal Aug. 17, 1999
5924697 Double gas seal with bellows supported by backing and support rings Jul. 20, 1999
5909878 Mechanical face seal assembly Jun. 8, 1999
5906374 Dual seal barrier fluid leakage control method utilizing linearly displaceable member May. 25, 1999

1 2 3










 
 
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