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Valve actuator

  • US 5,024,416 A
  • Filed: 06/22/1989
  • Issued: 06/18/1991
  • Est. Priority Date: 06/22/1989
  • Status: Expired due to Fees
First Claim
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1. An actuator system for a rotary valve operated by a rotatable shaft to select a desired flow rate through the valve, comprising:

  • an actuator member movable in a linear path transverse to the axis of said shaft through a stroke range for changing angular settings of the shaft about its axis; and

    linkage means operatively connected between the actuator member and the shaft for transmitting linear movement of the actuator member to angular movement of the shaft, including lost motion means in the form of a pin-and-slot connection such that the actuator member moves through a portion of its stroke range without effecting angular movement of the shaft before effecting a change in the angular setting of the shaft, said linkage means including first and second link arms pivotally connected to each other at adjacent ends.

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