Coupling for the transmission of alternating torques

  • US 5,645,017 A
  • Filed: 09/13/1990
  • Issued: 07/08/1997
  • Est. Priority Date: 01/13/1989
  • Status: Expired due to Term
First Claim
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1. An internal combustion engine comprising:

  • a camshaft which actuates an element;

    a main shaft which drives said camshaft; and

    a variable phase coupling for transmission of an alternating torque between said main shaft and said camshaft where the parts in operation are subjected to alternating resistant and driving torques includinga cylinder to which one of said shafts is connected;

    a piston to which the other one of said shafts is connected and which is disposed relative to said cylinder such that at least two antagonistic chambers are provided in said cylinder and such that a relative and single position between said piston and said cylinder corresponds to an angular phase difference value between said shafts, said chambers having a substantially constant total volume and being filled with a hydraulic liquid which is practically incompressible at normal pressures of operation of the coupling;

    two communications circuits of substantially constant volume which interconnect said chambers and which allow fluid communication between said chambers only in respective opposite directions; and

    a distributing means for bringing into fluid communication said chambers through one or the other of said communication circuits while preventing fluid communication through the other of said communication circuits and for blocking fluid communication between said chambers, selectively, such that the phase difference between said shafts is selectively increased, decreased, or maintained constant.

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