Scissor-type linear actuator with high extension ratio and selectable extension rateand power requirement

• US 3,350,065 A
• Filed: 10/24/1966
• Issued: 10/31/1967
• Est. Priority Date: 10/24/1966
• Status: Expired due to Term

• Current Assignee: Harry S. Mankey
• Original Assignee: Harry S. Mankey
• Inventors: Mankey, Harry S.
• Application Number:
  US04/589,075
• Time in Patent Office: 372 Days
• US Class Current: 254/122
• CPC Class Codes: B66F 3/22 Lazy-tongs mechanisms B66F11/042 takes precedence
• CPC Class Codes: B66F 7/0666 Multiple scissor linkages vertically arranged
• CPC Class Codes: B66F 7/08 hydraulically or pneumatically operated
• CPC Class Codes: Y10T 74/20594 Lazy tongs

Claims

1. IN A SCISSOR-TYPE LINEAR ACTUATOR, THE COMBINATION OF:

A PAIR OF PIVOTALLY INTERCONNECTED ARMS WHICH ARE EXTENSIBLE BY MOVING THE ENDS OF THE ARMS TOGETHER AND RETRACTABLE BY MOVING THE ENDS OF THE ARMS APART, SUPPORT MEANS FOR THE ENDS OF THE ARMS PERMITTING APART, APART, PIVOT MEANS CONNECTING THE END OF ONE OF THE ARMS TO THE SUPPORT MEANS SUCH THAT A TORQUE CAN BE EXERTED ON SAID ONE ARM TO CAUSE EXTENSION OR RETRACTION OF THE ARM, SCISSOR CAM SURFACE MEANS FORMED ON THE END OF SAID ONE ARM AND SAID SUPPORT MEANS, CAM FOLLOWER MEANS FOR COOPERATIVELY ENGAGING THE SCISSOR CAM SURFACE MEANS AND EXERTING A TORQUE BETWEEN SAID ONE ARM AND THE SUPPORT MEANS ACTING ABOUT SAID PIVOT MEANS, SAID TORQUE TO EXTEND OR RETRACT THE ARMS, AND LINEAR ACTUATOR MENAS FOR MOVING THE CAM FOLLOWER MEANS AND THE END OF THE OTHER ARM EITHER TOGETHER OR APART TO EITHER EXTEND OR RETRACT THE ARMS AS A RESULT OF THE COMBINED EFFECT OF THE TORQUE EXERTED ON THE ARM BY THE SCISSOR CAM SURFACE MEANS AND THE MOVEMENT OF THE ENDS OF THE ARMS ONE RELATIVE TO THE OTHER.