Valve timing adjusting apparatus for internal combustion engine

  • US 20020043231A1
  • Filed: 05/07/2001
  • Published: 04/18/2002
  • Est. Priority Date: 08/09/2000
  • Status: Active Grant
First Claim
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1. A valve timing adjusting apparatus comprising:

  • a shoe case, which rotates in synchronism with a crankshaft of an engine side, and having a plurality of shoes which are protruded from the inner surface of said shoe case and composing a plurality of hydraulic chambers, a rotor, which is rotatably accommodated in said shoe case, and is formed with a plurality of vanes, said vanes dividing each of said plurality of hydraulic chambers into an advancing hydraulic chamber and a retarding hydraulic chamber, and a locking member, which is shiftable in the radial direction of said rotor, and can be fitted in and/or disengaged from a locking hole formed in the external peripheral surface of said rotor, wherein there is further formed a stepped portion in the external peripheral surface of said rotor in a continuing manner from said locking hole at a position deviated from said locking hole either in the advancing direction or retarding direction, said stepped portion being formed lower than said external peripheral surface, yet higher than the bottom of said locking hole.

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