Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1978-03-31
1979-09-04
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72442, B21D 1704
Patent
active
041663705
ABSTRACT:
A single electric motor is employed to drive two, separate backup roll supporting shafts which are mounted to rotate about a common horizontal axis. A first, solid, cylindrical backup roll of relatively small diameter (less than 11/2") is secured to one end of one of said shafts for rotation beneath a first grooving roll, and a second, relatively larger diameter backup roll (greater than 11/2" and less than 2"), which is annular in configuration, is secured coaxially to one end of the other shaft for rotation thereby beneath a second grooving roll. Each grooving roll is mounted for vertical reciprocation by springs and by a hydraulic ram supplied by fluid from a separate hand pump. Means is also provided for adjustably limiting the descent of each backup roll.
REFERENCES:
patent: RE16931 (1928-04-01), Pritchard
patent: 1205605 (1916-11-01), Eligh
patent: 3903722 (1975-09-01), Thau, Jr. et al.
E.G.S Manufacturing Corp.
Larson Lowell A.
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