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Linear motion arresting device

  • US 3,990,542 A
  • Filed: 01/22/1976
  • Issued: 11/09/1976
  • Est. Priority Date: 12/16/1974
  • Status: Expired due to Term
First Claim
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1. A linear motion arresting device comprising a relatively stationary sleeve having an internal bore;

  • a piston slidably mounted in and mating said bore, said piston being formed of a plurality of piston parts, slidable relative to each other along a plane parallel to the axis of said bore and movable radially toward and away from each other, said piston parts, each having an elongated groove extending generally parallel to the axis of said bore and with said grooves providing, directly between piston parts, a ball receiving channel in which a ball may travel and with the channel extending generally axially of, and at an angle to, the bore and with one end of each groove extending more radially inwardly of the direction of the bore than the other end portion;

    a ball mounted for traveling movement in, and relatively to, said ball receiving channel;

    resilient means urging said piston parts in opposite directions axially of said bore and moving said piston parts radially relative to each other by reason of said ball and said ball receiving channel; and

    prime mover means connected to one of said piston parts and connected only through said ball to the other piston part, said prime mover moving the said piston part, and also another piston part, through said ball, longitudinally of said bore and radially of each other.

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