Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Clamp structure constitutes sole initial metal-deforming...
Patent
1978-02-06
1979-02-13
Larson, Lowell A.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Clamp structure constitutes sole initial metal-deforming...
72355, 72392, B21D 3908
Patent
active
041388739
ABSTRACT:
A tool for forming substantially rectangular cross sections on conduits. Two mateable collars are disposable about the exterior of a conduit and have forming surfaces which can be pressed against the conduit's wall to predetermined extents to cause the conduit to assume the desired outside rectangular dimensions. Such pressing is provided by two threaded fasteners, each of which extend through one of the collar members and into threaded engagement with the mateable collar. The assembled collar configuration may be disengaged from, rotated about, and reclamped on the exterior of the conduit so as to provide uniform wall formation if the shape of the desired conduit permits such collar rotation. To assure complete contact between the conduit's exterior and the forming surfaces of the collar, two wedge members are axially inserted in the conduit's opening.
REFERENCES:
patent: 1935714 (1933-11-01), Hummell
patent: 2780122 (1957-02-01), McCown
patent: 2784623 (1957-03-01), Reynolds
patent: 3060994 (1962-10-01), Larsen et al.
patent: 3109479 (1963-11-01), Wolcott
Dailey George F.
Koroly James S.
Keen J. W.
Larson Lowell A.
Westinghouse Electric Corp.
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