Twisting apparatus for ultrafine rectangular bar

Details Twisting apparatus for ultrafine rectangular bar Twisting apparatus for ultrafine rectangular bar

2006-07-04

2006-07-04

Banks, Derris H. (Department: 3725)

Metal deforming

By twisting axially moving work

C072S065000, C072S298000, C072S299000, C072S371000

Reexamination Certificate

active

07069757

ABSTRACT:
The present invention relates to a twisting apparatus for an ultrafine rectangular bar, comprising: a chuck; chuck driving means; at least two vise clamps each of the vise clamps having a pressing surface capable of contacting to a side surface of the ultrafine rectangular bar; and vise clamp driving means. The chuck driving means and the vise clamp driving means are so controlled that, after the proximal end of the ultrafine rectangular bar is held by the chuck where the vise clamps are placed closely to the ultrafine rectangular bar, the chuck disengages the ultrafine rectangular bar when the vise clamps contact to the ultrafine rectangular bar and then engages again the ultrafine rectangular bar, in a ease where the vise clamps are approached closely to the ultrafine rectangular bar held by the chuck to twist the ultrafine rectangular bar upon isolating, as rotated correlatively, the chuck and the vise clamps from each other.

REFERENCES:
patent: 3427844 (1969-02-01), Bergstrom
patent: 3427845 (1969-02-01), Evans
patent: 4604884 (1986-08-01), Matsutani
patent: 61-53059 (1986-11-01), None
patent: 62-22733 (1987-05-01), None
English Abstract of JP 601290942, published Jul. 10, 1985.
English Abstract of JP 60016324, published Jan. 28, 1985.

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