×

Double action spring actuator

  • US 4,811,564 A
  • Filed: 01/11/1988
  • Issued: 03/14/1989
  • Est. Priority Date: 01/11/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a linear double action actuator the improvement which comprises:

  • a retractor spring constructed of a shape memory metal and an expansion spring constructed of a shape memory metal, each of said springs being attached at one end thereof to one end of an arm movably supported by and within said actuator, each of said springs being attached at their other end to a stationary member formed within said actuator, means for connecting said actuator to a source of energy and means for supplying said energy selectively to one of said springs, whereby the selective amortizations transforms said energized spring from the martensitic state to the austenitic state thereby slidably moving said movable arm in the desired direction within said actuator, said springs being substantially parallel at all times to each other and to the path of travel of said movable arm.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×