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Linear motion device having an anti-twist safeguard, comprising an elongate anti-friction lining

  • US 9,151,372 B2
  • Filed: 10/19/2012
  • Issued: 10/06/2015
  • Est. Priority Date: 10/20/2011
  • Status: Active Grant
First Claim
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1. A linear motion device comprising:

  • a housing;

    an extension arm, which projects from the housing and includes a securing section; and

    an anti-twist safeguard including at least one separate elongate anti-friction lining, which is formed with a constant cross-sectional shape, the anti-friction lining being arranged substantially without play between the housing and the securing section of the extension arm and extending transversely to a longitudinal axis,wherein the anti-friction lining comprises a strip having a first longitudinal end and a second longitudinal end, the strip extending longitudinally around a circumference of the extension arm to position the first longitudinal end and the second longitudinal end at positions where the first longitudinal end and the second longitudinal end are arranged facing each other and spaced apart from each other to define a free space therebetween,wherein the extension arm is supported on the housing in such a way that the extension arm is configured to move relative to the housing along the longitudinal axis,wherein in the securing section, the extension arm extends parallel to the longitudinal axis with a constant external cross-sectional shape deviating from a circular shape, andwherein the anti-twist safeguard engages positively in said external cross-sectional shape, thus securing the extension arm with respect to the housing against twisting relative to the longitudinal axis.

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