Patent ID: 8011672
Filing Date: 2011-09-06
Classification: F16J

Abstract:
1. An installation structure which is installed to an inner periphery of a shaft hole provided in a housing, comprising: a lip seal slidably in close contact with a peripheral surface of a shaft inserted to said shaft hole; and a cartridge arranged on an outer peripheral side of said lip seal, wherein said lip seal includes a first lip seal member, a second lip seal member, a backup ring, and a retaining ring; said first lip seal member having: said second lip seal member having: said backup ring having an annular flat shape and being arranged further toward an atmospheric air side of said lip seal than said second lip seal member so as to back up said second lip seal member, and said retaining ring having: said cylinder portion of said first lip seal member being arranged at an outer peripheral side of said tubular portion of said retaining ring, and said second seal lip member and said backup ring being caulked and fixed between said inward flange portion and said caulking portion of said retaining ring, and said cartridge having: said cartridge being fitted to an inner peripheral surface of said shaft hole at an outer peripheral surface of said large-diameter tube portion, while said lip seal is fitted to an inner peripheral surface of said small-diameter tube portion.