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Class Information
Number: 277/366
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.) > Shaft mounted sealing face members biased axially away from each other
Description: Multiple sealing faces wherein the surface members are on the one relatively movable part (e.g., shaft, etc.) enclosed by the other relatively movable part (e.g., housing, casing, etc.) and forced along the rotational axis formed between the relatively movable parts in an outwardly direction.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8678756 System and method for re-building a pump Mar. 25, 2014
8033549 Mechanical seal Oct. 11, 2011
7726658 Driven seal assembly for rotary drive shaft of motor Jun. 1, 2010
7708284 Spring supported dual element face seal with a run surface sleeve May. 4, 2010
7219898 Spring supported dual element face seal with a run surface sleeve May. 22, 2007
6641140 Apparatus for retaining lubrication oil at sliding surface of shaft seal device disposed within oil chamber of submersible pump Nov. 4, 2003
6632075 Sealing and cooling device Oct. 14, 2003
6589022 Compressor having a seal cooling structure in which all refrigerant fluid supplied to the compressor is used to cool compressor shaft seals Jul. 8, 2003
6504888 Apparatus and methods of flow measurement for a boiling water reactor internal pump Jan. 7, 2003
6446975 Seal arrangement Sep. 10, 2002
6305692 Seal device Oct. 23, 2001
5865441 Emission seal Feb. 2, 1999
5755444 Lipped sealing ring having wax packed in helical grooves to facilitate testing upon installation May. 26, 1998
5562406 Seal assembly for fluid pumps and method for detecting leaks in fluid pumps or fluid containment devices Oct. 8, 1996
5498007 Double gas barrier seal Mar. 12, 1996
5409240 Seal with self-lubricating contact surface Apr. 25, 1995
5409241 Positive drive compensating shaft seal Apr. 25, 1995
5375853 Secondary containment seal Dec. 27, 1994
5238253 Regenerative turbine flow inducer for double or tandem mechanical seals Aug. 24, 1993
5217234 Mechanical seal with barrier fluid circulation system Jun. 8, 1993
5211532 Apparatus for applying a back pressure to a pump drive shaft seal May. 18, 1993
5180297 Fluid transfer pump with shaft seal structure Jan. 19, 1993
5165699 Liquid full pressurized vessel seal Nov. 24, 1992
5076765 Shaft seal arrangement of turbocharger Dec. 31, 1991
5029685 Oil sealing structure for a hydraulic device for an automatic transmission Jul. 9, 1991
5024450 Seal cartridge assembly Jun. 18, 1991
4865333 Seal protection apparatus Sep. 12, 1989
4863293 Sealed bearing assembly Sep. 5, 1989
4852890 Rotary shaft bearing isolator seal Aug. 1, 1989
4830344 Canted-coil spring with turn angle and seal May. 16, 1989
4822056 Adjustable rotary shaft seal Apr. 18, 1989
4817966 Rotary shaft bearing isolator seal Apr. 4, 1989
4629196 Coupler and manifold assembly with differential vacuum seal means Dec. 16, 1986
4595206 Seal with inner and outer slidably contacting rings Jun. 17, 1986
4591167 Slide ring seal with pre-contoured bellows May. 27, 1986
4486026 Sealing and bearing means by use of ferrofluid Dec. 4, 1984
4426091 Track joint seal assembly with interlocked thrust ring Jan. 17, 1984
4419086 Trunnion seal and cross venting system for a cardan-type universal joint Dec. 6, 1983
4410188 Slurry pump double mechanical split face seal Oct. 18, 1983
4392832 Steering and propulsion system for marine use Jul. 12, 1983
4381867 Automatically positionable mechanical shaft seal May. 3, 1983
4361334 Compression sealed composite seal seat with cooling passages Nov. 30, 1982
4294454 Rotary seal unit Oct. 13, 1981
4290611 High pressure upstream pumping seal combination Sep. 22, 1981
4203684 Articulated joint including Belleville spring seals maintained in preselected compressed state May. 20, 1980
4202553 Seal cartridge for agitator shaft of a chemical reactor May. 13, 1980
4192518 Device for sealing an aperture in a partition wall through which a rotating drum extends Mar. 11, 1980
4188146 Articulated joint including Belleville spring seals maintained in a preselected compressed state Feb. 12, 1980
4173129 Universal joint structure with improved seal Nov. 6, 1979
4145058 Shaft seal assembly for high speed and high pressure applications Mar. 20, 1979

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