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Ring piston seal for a hydraulically controlled disconnect system

  • US 6,076,645 A
  • Filed: 09/03/1998
  • Issued: 06/20/2000
  • Est. Priority Date: 03/04/1996
  • Status: Expired due to Fees
First Claim
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1. Hydraulically controlled disconnect system for a friction clutch of motor vehicles with a manually shiftable gear box, the disconnect system including a slave cylinder with a pressure housing (2) which is arranged concentrically in relation to a gear box input shaft (3) which connects an internal combustion engine with the gear box, a guiding sleeve (5) is arranged radially apart from and in a longitudinal bore of the pressure housing (2) to form a circularly configured pressure chamber (9), and a ring piston (7) is guided and axially movable in the pressure chamber (9) and includes a reinforced seal (8a, 8b) on the pressure chamber side, the reinforced seal (8a, 8b) having sealing lips (14, 15) which are arranged radially spread apart to form a V-shaped recess, the seal (8a, 8b) characterized with the following structure:

  • the radially outer sealing lip (15) has a greater wall thickness in comparison with the radially inner sealing lip (14);

    an axial length of the inner sealing lip (14), proceeding from a back (17a, 17b) of the seal or a plane surface of the seal (8a, 8b), exceeds an axial length of the outer sealing lip (15); and

    a reinforcement (18a, 18b) connected to the seal (8a, 8b) to form-lock the seal on the piston ring (7) with an axial play "a" and a radial play ""r", wherein 0 mm >

    "a">

    2 mm and 0 mm>

    "r">

    1.5 mm.

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