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Operating hinge for seat and seat lid of toilet bowl

  • US 5,906,010 A
  • Filed: 03/11/1998
  • Issued: 05/25/1999
  • Est. Priority Date: 03/14/1997
  • Status: Expired due to Fees
First Claim
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1. An operating hinge for a seat and seat lid of a toilet bowl, comprising:

  • a hinge case to be installed to a body of a toilet bowl;

    a shaft provided rotatably inside the hinge case to support the seat and seat lid;

    a stationary cam secured inside the hinge case and having formed therein a central hole through which the rotating shaft is axially penetrated;

    a cam provided inside the hinge case in a vis-vis relationship with the stationary cam and having formed therein a central hole through which the rotating shaft is axially penetrated, to be slidable on, and rotatable with, the rotating shaft; and

    a resilient member for urging the rotatable sliding cam toward the stationary cam;

    further comprising, to more positively control the rotation of the rotating shaft;

    a rubber ring fitted on the rotating shaft between the rotating shaft and the hinge case to abut the inner wall of the hinge case;

    a viscous oil applied between the periphery of the rubber ring and the hinge case inner wall the rubber ring abuts; and

    a means of adjusting a pressure the rubber ring applies to the inner wall of the hinge case.

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