| Patent Number |
Title Of Patent |
Date Issued |
| 5692757 |
Bidirectional shaft seal with intersecting spiral grooves |
December 2, 1997 |
| A bidirectional hydrodynamic shaft seal includes an annular plastic disk having a sealing surface or lip provided with two connected spiral grooves extending around the disk axis. One of the spiral grooves spirals outwardly in a clockwise direction, and the other spiral groove spirals |
| 5326111 |
Separately bonded elastomeric sleeve for seal casing |
July 5, 1994 |
| A shaft seal includes an annular rigid seal case insertable into a cylindrical bore in a seal housing. The joint between the seal case and the bore is sealed by an annular resilient sleeve stretched over the outer surface of the case. The sleeve is initially formed as a thin flat annular |
| 5209502 |
Dual lip seal and method of forming the seal |
May 11, 1993 |
| A dual lip shaft seal includes two sealing disks bonded directly to a radial wall of an annular metal case. The radial wall has an annular step, such that two separate mounting surfaces are formed for mounting the two disks. Each sealing disk is preferably formed of PTFE and heat-bonded |
| 5209499 |
Unitized polytetrafluoroethylene radial lip seal |
May 11, 1993 |
| A unitized radial lip seal assembly includes an outer annular case and an inner annular wear sleeve loosely interlocked by flanges or walls formed at the axial ends of the wear sleeve. After initial installation of the unitized assembly within a housing, the wear sleeve can be axially sh |
| 5198053 |
Method and apparatus for bonding polytetrafluoroethylene to a metal substrate and articles there |
March 30, 1993 |
| Polytetrafluoroethylene (PTFE) is bonded to a metal substrate such as an oil seal casing via an intermediary bonding layer of fluorinated ethylene propylene (FEP). Induction heating is used to rapidly melt the FEP and PTFE without degrading their physical properties. The induction heatin |
| 5052696 |
Compact compressor seal |
October 1, 1991 |
| A shaft seal having a thin radial section is adapted for mounting within a small radial annular clearance space between a housing and a shaft. An elastomeric sealing member is bonded to an axially inner portion of the seal and a polytetrafluoroethylene sealing member is clamped to an axi |
| 5032335 |
Manufacture of sealing elements of composite sintered polymeric material |
July 16, 1991 |
| A sealing element for use with a radial lip oil seal includes a mounting section formed of a first polymer and a sealing section formed of a second polymer. The sealing element sections are bonded together during a common sintering operation so that each polymer is sintered only once. Th |
| 5015001 |
Low friction seal assembly |
May 14, 1991 |
| A lubricant seal assembly adapted for installation in an annular clearance space between a shaft and a surrounding housing. The assembly includes inner and outer case members that can be press fit on the shaft and housing. An annular bumper element is arranged between confronting sur |
| 4943068 |
Unitized exclusion seal |
July 24, 1990 |
| A static dirt exclusion element is arranged in a unitized housing to contact a rotating exclusion element so as to provide a primary barrier to dust and airborne contaminants. A secondary barrier is provided in the housing in the form of a porous filter element formed of a foam or felted |
| 4861045 |
Dust excluder for vehicle air conditioning compressor seal assembly |
August 29, 1989 |
| A dust excluder (12) for a seal assembly (10) such as utilized with a vehicle air conditioning compressor is disclosed as having an annular inner portion (36) that mounts on a rotatable compressor shaft (20) and as including an outer portion (38) that seals with an annular support (24) o |
| 4818620 |
Elastomer coated lip seal |
April 4, 1989 |
| A lip seal having enhanced shock loading capabilities includes a rigid case member coated with an elastomeric material. A composite annular sealing lip having a bonding portion formed of an elastomeric material and a contact portion formed of polytetrafluoroethylene is bonded to the case |
