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Class Information
Number: 277/929
Name: Seal for a joint or juncture > Seal feature where change in operation or condition induces additional leakage control
Description: Sealing means including means to prevent seepage from occurring at the joint or juncture during a change in the system or state of the seal (e.g., when relative movement between parts stops, etc.).










Patents under this class:

Patent Number Title Of Patent Date Issued
6786487 Actuated brush seal Sep. 7, 2004
6725464 Rotary joint for diving suits Apr. 27, 2004
5873574 Bellows seal with reverse pressure capability Feb. 23, 1999
5487550 Secondary gas/liquid mechanical seal assembly Jan. 30, 1996
5171024 Reactor coolant pump shaft seal utilizing shape memory metal Dec. 15, 1992
5074568 Shaft seal Dec. 24, 1991
5058905 Seal Oct. 22, 1991
4900039 Twin face seal Feb. 13, 1990
4865332 Sealing arrangement between a shaft and a housing of a fluid flow engine Sep. 12, 1989
4865333 Seal protection apparatus Sep. 12, 1989
4848774 Reactor coolant pump hydrostatic sealing assembly with externally pressurized hydraulic balance chamber Jul. 18, 1989
4673332 Lubrication seals Jun. 16, 1987
4629196 Coupler and manifold assembly with differential vacuum seal means Dec. 16, 1986
4552368 Backup seal with bush in form of radially floating washer Nov. 12, 1985
4541638 Emergency shaft seal device by deformation of packing ring Sep. 17, 1985
4537407 Apparatus for testing pipes by a pipe tester Aug. 27, 1985
4517804 Condenser vacuum retaining apparatus for steam power plant May. 21, 1985
4484752 Rotating-lip bidirectional hydrodynamic oil seal Nov. 27, 1984
4477088 Face seal means with back-up seal Oct. 16, 1984
4451048 High speed shaft seal May. 29, 1984
4431199 Self-hydraulic pressure generating and maintaining device for shaft-seal mechanism Feb. 14, 1984
4426089 Dust-proof device for mechanical seal Jan. 17, 1984
4415165 Integral elastomeric/graphite dynamic face seal Nov. 15, 1983
4410186 Sealing system for pressurized flanged joints Oct. 18, 1983
4406460 Anti-weepage valve for rotating seals Sep. 27, 1983
4395048 Pump safety device Jul. 26, 1983
4375291 Back-up mechanical seal Mar. 1, 1983
4188039 Bulkhead shaft seal Feb. 12, 1980
4174843 Self-adjusting tandem seal Nov. 20, 1979
4161316 Gastight penetration Jul. 17, 1979
4139203 Labyrinth type rotary seal with intermittent feature of contact type seal Feb. 13, 1979
4127275 Self-disengaging static seal Nov. 28, 1978
4114059 Grooved visco seal for stationary discharge chamber of water-cooled turbine generator Sep. 12, 1978
4114058 Seal arrangement for a discharge chamber for water cooled turbine generator rotor Sep. 12, 1978
4105040 Temperature responsive valve seal Aug. 8, 1978
4076260 Sealing device for rotary machines containing hydraulic fluid Feb. 28, 1978
4067583 Sealing device with closure system for compressor Jan. 10, 1978
4058320 Generator seal oil supply system Nov. 15, 1977
3994503 Sealing assembly Nov. 30, 1976
3985365 Remotely actuated emergency shaft seal Oct. 12, 1976
3967678 Stuffing box control system Jul. 6, 1976
3951419 Seal between members which are rotatable relative to each other Apr. 20, 1976
3948531 Bulkhead seal Apr. 6, 1976
3948530 Externally adjustable mechanical seal Apr. 6, 1976
3947044 Secondary sealing device Mar. 30, 1976
3940150 Partly melting rotating helical ring assembly Feb. 24, 1976
3939910 Stuffing box and blow out preventing device for polish rods of oil well pumping units Feb. 24, 1976











 
 
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