Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1993-08-31
1995-09-19
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
B21D 4102
Patent
active
054507383
ABSTRACT:
An apparatus for forming a piping element connection with multiple outward steps has first and second rollers, a driver for the second roller, and a positioning roller. The first roller rotates about a first axis, with first and second upper surfaces of rotation centered thereabout, the first surface mean diameter being less than that of the second surface. The first roller has an upper leading edge between the first and second upper surfaces. The second roller is mounted for rotation about a second axis parallel to the first axis, with first and second lower surfaces of rotation centered thereabout, the first surface mean diameter being greater than that of the second surface, and the second roller having a lower trailing edge between the first and second lower surfaces. The first and second rollers are mounted for movement together and apart in a plane of the first and second axes for engagement and forming of multiple outward steps in the piping element connection placed therebetween.
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"AWWA Standard for Grooved and Shouldered Joints" (American Water Works Association, May 1987) 10 pages.
"Expanded Pipe Coupling Style 24" (Victaulic, 1985), 4 pages.
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Chatterley Charles N.
Horgan Michael W.
Grinnell Corporation
Larson Lowell A.
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