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One-way damper

  • US 4,697,673 A
  • Filed: 12/22/1986
  • Issued: 10/06/1987
  • Est. Priority Date: 07/16/1984
  • Status: Expired due to Fees
First Claim
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1. A one-way type of a damper comprising:

  • a housing provided with a sleeve-like base element and a bottom wall said bottom wall having a centrally disposed frustoconical upward projection thereon and an upwardly facing surface outwardly of said projection;

    a rotor which has an axle and a braking disc at one end of said axle, the disc being contained in said housing together with a damping oil, the other end of the axle extending outward from said housing, and having a gear mounted thereon for rotation relative thereto, said axle at said one end having a recess receiving said projection for centralizing said axle, said one end of said axle having an annular portion below said disc and substantially engaging said upwardly facing surface, said axle having a boss extending above said disc;

    said housing including a cap with a central opening through which said axle extends, and a resilient diaphragm in said housing beneath said cap and substantially engaging said boss, said damping oil being disposed below said diaphragm on either side of said disc and in said recess;

    said gear having an axial bore therethrough and a counter-bore therein, and a coil spring into which said axle of said rotor is inserted, said spring fitting within said counter-bore and snugly embracing and engaging said axle, one end portion of said coil spring being fixed to said gear, the coil spring being reduced in diameter when said gear rotates in one direction and being expanded in diameter when said gear rotates in the other direction;

    whereby said gear transmits torque to said rotor through said coil spring when said gear rotates in said one direction but not when said gear rotates in said other direction.

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