Patents Assigned to Sempell AG
  • Patent number: 4946131
    Abstract: Arrangement for damping linear movements intended for use on a safety valve. An arrangement for damping linear movements of the valve spindle (10) of a safety valve of small amplitude and high frequency comprises two counter-rotatable damping parts (18, 36) with intermeshing wall (22, 24, 32) which delimit narrow working gaps (44, 46) containing a high-viscosity silicone grease. The linear intake movement is converted by a threaded drive (12, 40) into a rotary movement during which the silicone grease (47) in the working gaps (44, 46) is subjected to shear forces and eliminates the unwanted energy by virtue of its internal friction.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: August 7, 1990
    Assignee: Sempell AG
    Inventor: Manfred Weyand