Lip type seal

A lip type seal installed to an inner periphery of a shaft hole of a housing to slidably come into close contact with a peripheral surface of a shaft, the lip type seal comprising:

• a first lip seal member made of a rubber-like elastic material and fitted to the inner periphery of said shaft hole;
• a retaining ring made of a metal and fitted and retained to said first lip seal member in a non-bonding manner;
• a second lip seal member made of a resin and retained by caulking to said retaining ring;
• and
• a backup ring supporting the second lip seal member,
• wherein said first lip seal member integrally has a tubular portion fitted to the inner periphery of said shaft hole, a radial portion provided on one end portion in an axial direction of said tubular portion, a seal lip provided on an inner peripheral end portion of said radial portion, and a collar portion provided on the other end portion in the axial direction of said tubular portion,
• wherein said retaining ring integrally has a cylinder portion fitted in a non-bonding manner between the radial portion and the collar portion at an inner peripheral side of the tubular portion of said first lip seal member, a first flange portion provided on one end portion in an axial direction of said cylinder portion in such a manner as to come into contact with said radial portion, and a second flange portion provided on the other end portion in the axial direction of said cylinder portion in such a manner as to come into contact with said collar portion, and
• wherein said second lip seal member and the backup ring are retained by caulking between said both flange portions.