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Chain tensioning device

  • US 4,712,469 A
  • Filed: 10/19/1984
  • Issued: 12/15/1987
  • Est. Priority Date: 10/21/1983
  • Status: Expired due to Fees
First Claim
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1. A hydraulic tensioning device comprising:

  • cylinder means for housing;

    means, associated with said cylinder means, for fixing said cylinder means;

    tappet means for coupling said tensioning device to an apparatus to be tensioned;

    means for translating vibrational forces transmitted to said tappet means into a tensioning force tending to extend said tappet means, located within said means for housing;

    includinga piston assembly arranged within said cylinder exhibiting a piston base defining a primary cylinder chamber;

    a tappet piston arranged within said piston assembly and defining an auxiliary cylinder chamber;

    means for drawing hydraulic fluid into said auxiliary cylinder chamber and pumping said hydraulic fluid into said primary cylinder chamber upon reciprocation of said tappet piston, located within said piston assembly; and

    means for limiting said tensioning force by idling said means for drawing, upon attainment of a predetermined pressure in said auxiliary cylinder chamber.

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