Metal deforming – By plural tool-couples – With means to feed work between plural tool stations
Reexamination Certificate
2005-02-01
2005-02-01
Crane, Daniel C. (Department: 3725)
Metal deforming
By plural tool-couples
With means to feed work between plural tool stations
C072S421000
Reexamination Certificate
active
06848290
ABSTRACT:
A self-contained stock lifter is particularly adapted for use in multiple station, progressive metal forming dies and the like, and includes a base plate with two vertical through holes adjacent opposite sides, and a vertical spring unit aperture located between the through holes. The stock lifter also includes a lifter bar having two vertical through holes in vertical registry with the base plate through holes. Two rigid guide shafts are mounted in the base plate through holes to permit the lifter bar to reciprocate in a manner which selectively lifts stock in the die to permit longitudinal shifting of the stock along the multiple die stations. A spring unit has a base retained in the spring unit aperture, and a reciprocating rod biased outwardly, with a free end abutting a central portion of the lifter bar to shift the lifter bar to an extended position, thereby defining a fully self-contained unit that can be readily mounted in and removed from the die to reduce manufacturing and repair costs.
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Breen Scott M.
Brown Charles T.
Pyper Jeffery S.
Pyper Joel T.
Pyper John K.
Crane Daniel C.
Price Heneveld Cooper DeWitt & Litton LLP
Pyper Tool & Engineering, Inc.
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