Two-stage transfer bar lift arm

Details Two-stage transfer bar lift arm Two-stage transfer bar lift arm

B - Operations, Transporting

23

Q

201/73

B23Q 7/00 (2006.01)

Patent

CA 2033785

13 ABSTRACT A two-stage lift arm for raising a transfer bar used in a multi-station machining assembly includes a central pivot at which it is mounted for rotation in a vertical plane about a horizontal axis, a-primary lift roller spaced a first distance from the central pivot location, a secondary lift roller spaced a second distance from the central pivot location, the second distance being greater than the first distance, and means for positively rotating the lift arm between a first position in which only the primary lift roller contacts the transfer bar, a second position in which both rollers contact the transfer bar, and a third position in which only the second lift roller contacts the transfer bar.

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