Valve timing adjusting device

  • US 6,450,138 B1
  • Filed: 09/25/2001
  • Issued: 09/17/2002
  • Est. Priority Date: 01/25/2000
  • Status: Expired due to Term
First Claim
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1. A valve timing regulation device, including:

  • a camshaft which drives opening and closing of a valve in an internal combustion engine;

    a housing having a plurality of shoes on an inner peripheral face, said housing being arranged to rotate freely on the camshaft and rotated with an output of the internal combustion engine;

    a rotor having a plurality of vanes which define a retarding hydraulic chamber and an advancing hydraulic chamber in cooperation with both wall surfaces of each shoe orientated to a circumferential direction, said rotor being stored in the housing to rotate relative to the housing and coupled to the camshaft; and

    a lock means which is operated by a mechanical urging force and restricts the relative rotation of the rotor and the housing, said lock means releasing the restriction by operation of a hydraulic control pressure in a direction against the mechanical urging force, said valve timing regulation device comprising;

    a rotor urging member disposed between the wall surfaces of the shoes and the vanes orientated to the circumferential direction for urging the rotor in a rotational direction towards a fixed lock position with respect to the housing; and

    , a pair of holder members mounted on the wall surfaces of the shoes and the vanes for supporting both ends of the rotor urging member.

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