×

Clamp for presses

  • US 3,987,681 A
  • Filed: 08/09/1972
  • Issued: 10/26/1976
  • Est. Priority Date: 08/09/1972
  • Status: Expired due to Term
First Claim
Patent Images

1. A clamping device for use on presses comprising, a housing having a bore therethrough, an elongate clamping rod in said bore, said rod being rotatable in opposite directions relative to said bore and axially reciprocable relative thereto, said rod having opposite ends and clamping means on one of said ends, guide means between said housing and rod guiding reciprocation of said rod relative to said bore along a generally linear path between extended and retracted positions relative to said bore and guiding rotation of said rod relative to said bore along a circumferential path at said extended position and between a first circumferential rod position circumferentially coinciding with said linear path and a second circumferential rod position circumferentially spaced from said linear path less than 360°

  • , drive means on the other of said opposite ends of said rod, said drive means including external thread means on said rod and internally threaded sleeve means threadedly engaged with said external thread means, means supporting said sleeve means for rotation relative to said housing and against axial displacement relative to said bore, means for rotating said sleeve means in opposite directions, and means for controlling said means for rotating said sleeve means to achieve, in sequence, linear movement of said clamping rod from said retracted to said extended position of said rod, rotation of said rod in said extended position and in one circumferential direction from said first to said second circumferential rod position, rotation of said rod in said extended position and in the opposite circumferential direction from said second to said first circumferential rod position, said linear movement of said rod from said extended to said retracted position of said rod.

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