Self-lubricating seal
|
patent
|
August 1976 |
Bidirectional hydrodynamic polytetrafluoroethylene seal
|
patent
|
October 1976 |
Annular seal
|
patent
|
January 1978 |
Shaft seal with helical pumping element
|
patent
|
June 1978 |
Bi-directional hydrodynamic shaft seal method
|
patent
|
October 1978 |
Hydrodynamic seal with collector bead
|
patent
|
January 1980 |
Machinery seal
|
patent
|
March 1980 |
Sealing ring
|
patent
|
November 1980 |
Drilling head
|
patent
|
August 1981 |
Rotary shaft seal
|
patent
|
August 1981 |
Hydrodynamic shaft seal
|
patent
|
September 1981 |
Sinuous seal with auxiliary excluder lips
|
patent
|
June 1982 |
Apparatus for applying pressure to fluid seals
|
patent
|
February 1983 |
Fluid seal with rib for rotary shaft
|
patent
|
May 1983 |
Elastomeric seal ring with self-lubricating wear-reducing feature
|
patent
|
June 1983 |
Self-venting seal lip
|
patent
|
August 1983 |
Hydrodynamic shaft seal with continuously divergent seal element
|
patent
|
April 1984 |
Rotary bidirectional dynamic shaft seal having a pumping projection with angulated primary and secondary pumping surfaces
|
patent
|
April 1984 |
Bi-directional hydrodynamic slitted seal
|
patent
|
May 1984 |
Method of providing a fluid seal in downhole drilling apparatus
|
patent
|
October 1984 |
Rotary shaft seal
|
patent
|
November 1984 |
Extended wear annular oil seal
|
patent
|
July 1985 |
Method of producing a hydrodynamic seal
|
patent
|
September 1985 |
Hydrodynamic lubricant seal for drill bits
|
patent
|
September 1986 |
Roller cutter drill bit having a texturized seal member
|
patent
|
October 1986 |
Lip sealing ring with tow rows of projections and for a rotary shaft
|
patent
|
June 1987 |
Hydrodynamic seal
|
patent
|
November 1987 |
Twist proof seal ring arrangement for shafts
|
patent
|
March 1988 |
Bidirectional seal with elliptical sealing barriers
|
patent
|
April 1988 |
Seal ring having lubricant pockets and a process of making a seal ring
|
patent
|
June 1988 |
Hydrodynamic seal
|
patent
|
September 1988 |
Sealing ring with two rows of projections and for a rotary shaft
|
patent
|
November 1988 |
Rotary shaft wave seal
|
patent
|
December 1988 |
Bi-directional oil seal with leakage recovering rib formations
|
patent
|
March 1991 |
Shaft seal
|
patent
|
August 1992 |
Shaft seal
|
patent
|
September 1992 |
Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms
|
patent
|
January 1993 |
Radially undulating shaft seal
|
patent
|
March 1993 |
Laterally translating seal carrier for a drilling mud motor sealed bearing assembly
|
patent
|
March 1993 |
Patterned textured seal
|
patent
|
March 1993 |
Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms
|
patent
|
July 1993 |
Hydrodynamically lubricated rotary shaft seal having twist resistant geometry
|
patent
|
July 1993 |
Radial shaft sealing ring
|
patent
|
June 1995 |
Bearing seal with oil deflectors
|
patent
|
April 1996 |
Rotating blowout preventor
|
patent
|
July 1997 |
Rotating blowout preventer
|
patent
|
September 1997 |
Hydrodynamically lubricated rotary shaft seal with environmental side groove
|
patent
|
October 1997 |
Bidirectional shaft seal with intersecting spiral grooves
|
patent
|
December 1997 |
Annular shaft seal having an elastic sealing lip
|
patent
|
January 1998 |
Extrusion resistant hydrodynamically lubricated multiple modulus rotary shaft seal
|
patent
|
April 1998 |
Seal design with bi-directional pumping
|
patent
|
August 1998 |
Rod seal cartridge for progressing cavity artificial lift pumps
|
patent
|
October 1998 |
Skew and twist resistant hydrodynamic rotary shaft seal
|
patent
|
February 1999 |
Oil seals and method of making thereof
|
patent
|
June 1999 |
Uni-directional seal for use on a shaft
|
patent
|
July 1999 |
Swivel seal assembly
|
patent
|
December 1999 |
Rotating drilling head with spaced apart seals
|
patent
|
January 2000 |
Skew and twist resistant hydrodynamic rotary shaft seal
|
patent
|
March 2000 |
Textured seal for reduced wear
|
patent
|
August 2000 |
Rotary seal with enhanced lubrication and contaminant flushing
|
patent
|
August 2000 |
Extrusion resistant hydrodynamically lubricated rotary shaft seal
|
patent
|
September 2000 |
Textured seal
|
patent
|
October 2000 |
Controlled leakage rotating seal ring with elements for receiving and holding a lubricant on a face thereof
|
patent
|
February 2001 |
High pressure rotary shaft sealing mechanism
|
patent
|
May 2001 |
Skew resisting hydrodynamic seal
|
patent
|
November 2001 |
Hydrodynamic packing assembly
|
patent
|
January 2002 |
Rotary drilling head assembly
|
patent
|
March 2002 |
Hydrodynamic seal with improved extrusion abrasion and twist resistance
|
patent
|
May 2002 |
Downhole rotary motor with sealed thrust bearing assembly
|
patent
|
August 2002 |
Rotary seal with improved dynamic interface
|
patent
|
December 2002 |
Rotating blowout preventer with independent cooling circuits and thrust bearing
|
patent
|
April 2003 |
Hydrodynamic rotary coupling seal
|
patent
|
May 2003 |
Hydrodynamic rotary seal with varying slope
|
patent
|
February 2004 |
Hydrodynamic rotary seal with opposed tapering seal lips
|
patent
|
July 2004 |
Hydrodynamic rotary seal
|
patent
|
May 2006 |