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Linear actuator

  • US 6,158,295 A
  • Filed: 06/17/1999
  • Issued: 12/12/2000
  • Est. Priority Date: 12/23/1996
  • Status: Expired due to Term
First Claim
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1. A linear actuator which comprises:

  • a housing,a motor,a spindle which is axially rotatable in opposite directions by said motor,a threaded nut mounted on said spindle and movable therealong with rotation of said spindle,a piston rod movable with said threaded nut as said threaded nut moves along said spindle,a transmission in said housing and operatively connected to said motor,a coupling means in said housing operatively connected between said transmission and said spindle, anddisengagement means for disengaging said spindle from said motor, said disengagement means including braking means adjustable relative to said housing for causing said coupling means to control rotational speed of said spindle when disengaged from said motor.

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