Apparatus for bending tubes or bars and motor-pump unit therefor

Details Apparatus for bending tubes or bars and motor-pump unit therefor Apparatus for bending tubes or bars and motor-pump unit therefor

1979-03-05

1981-11-10

Crosby, Gene P.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

60468, 7245316, B21D 706

Patent

active

042991137

ABSTRACT:
An apparatus for bending and/or curving tubes or bars, comprises bearings for the tube or bar to be curved or bent. The said bearings arranged on a support having a handle extending therefrom and enclosing an axially movable stem. A fluid, which is furnished by a pump being enclosed within a container for the collection of the tool operating fluid in a closed circuit also passing continuously through said handle, the flowing speed of said fluid being adjustable by means of a throttling member. The resulting increase in fluid pressure, as built up upstream of the throttling, being used for a stem feeding pressure, with subsequent bending and/or curving operation.

REFERENCES:
patent: 2867261 (1959-01-01), Traupmann
patent: 2998838 (1961-09-01), Byrd
patent: 3213605 (1965-10-01), Welden
patent: 3344635 (1967-10-01), Van Allen
patent: 3620066 (1971-11-01), Henkel
patent: 4055069 (1977-10-01), Caporusso

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