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Oil filled rotary damper having a symmetrically shaped flexible membrane

  • US 4,614,004 A
  • Filed: 11/01/1984
  • Issued: 09/30/1986
  • Est. Priority Date: 11/07/1983
  • Status: Expired due to Term
First Claim
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1. A rotary oil type damper, comprising:

  • a housing;

    a rotor comprising a shaft having a leading end thereof extending out of said housing and provided at a basal portion thereof with a flared part radially diverged downwardly and a braking disk extending from said flared part and integrally formed with said shaft and accommodated within said housing;

    a centrally through apertured flexible membrane formed substantially symmetrically with respect to the observe and reverse sides thereof, inserted around said flared part of said rotor for sealing with the same, and positioned in said housing overlying but not normally contacting said braking disk; and

    a quantity of oil placed within said housing around said braking disk.

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