05209502 is referenced by 33 patents and cites 7 patents.

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 to its respective mounting surface by an induction heater coil disposed in confronting relation to the radial wall of the metal case.

Title
Dual lip seal and method of forming the seal
Application Number
7/903019
Publication Number
5209502
Application Date
June 23, 1992
Publication Date
May 11, 1993
Inventor
Michael A Savoia
Manchester
MI, US
Agent
Lawrence J Shurupoff
Assignee
Mather Seal Company
MI, US
IPC
F16T 15/32
View Original Source