Patent ID: 6484675
Filing Date: 2002-11-26
Classification: F01L,F15B

Abstract:
A variable valve mechanism having a hydraulic actuator, said hydraulic actuator comprising:an elongate cylinder having a central axis, a sidewall, a top and bottom, said sidewall interconnected with said top and bottom in an air and fluid tight manner; an elongate control shaft having a first portion disposed within said cylinder and being substantially parallel with said central axis, said control shaft extending in an axial direction through said top, said top sealingly engaging said control shaft, a second portion of said control shaft being disposed external to said cylinder, said second portion of said control shaft being pivotally coupled to said variable valve mechanism; a fixed vane disposed in sealing engagement with said sidewall, said top, said bottom and said first portion of said control shaft; and a movable vane in sealing engagement with said top and said bottom, said movable vane having an inner end and an outer end, said inner end being affixed to said first portion of said control shaft, said outer end sealingly engaging said sidewall.