Linear actuator

  • US 7,471,020 B2
  • Filed: 08/20/2003
  • Issued: 12/30/2008
  • Est. Priority Date: 08/20/2002
  • Status: Active Grant
First Claim
Patent Images

1. A linear actuator comprising a cabinet, a reversible electric motor with a motor shaft;

  • a reduction gear operatively connected with the motor shaft;

    a spindle operatively connected with the reduction gear;

    a spindle nut secured against rotation on the spindle;

    an activating element connected with the spindle nut and for attachment to a structure in which the actuator is to be incorporated;

    a rear attachment disposed in extension of the spindle opposite the activating element likewise for attachment of the actuator in the structure in which the actuator is to be incorporated, the rear attachment having a longitudinal opening in the longitudinal axis of the spindle; and

    a shaft member provided in the opening as a separate element, said shaft member being connected at one end thereof with one end of the spindle and configured at its other end for operative reception of the end of a hand crank.

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