Portable manually-controlled three-speed pipe-bending machine

Details Portable manually-controlled three-speed pipe-bending machine Portable manually-controlled three-speed pipe-bending machine

1989-06-02

1991-06-11

Jones, David

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

72155, 72443, 72444, 72459, B21D 704

Patent

active

050222490

ABSTRACT:
Portable manually-controlled pipe-bending machine designed for operation at three different speeds, consisting of a boxlike main body, which in its simplest form contains two gear assemblies i.e.: a speed reducer with cooperating gears mounted on three parallel axes, corresponding to three different speeds which are obtained by fitting a conventional handle or any other appropriate structure into a socket driving a gear shaft, and thus making the reduction gear rotate at the desired speed; and a transmission mechanism which is connected with the output gear of the speed reducer and which transmits to a gear train up to the final gear to turn the main driving shaft integral with it and mounting the bending member or matrix. The machine is provided with an auxiliary device performing an intermediary function, which is either separate from the machine and can be connected with one of the three sockets of the speed reducer or is built in the main body, the friction coupling function of this auxiliary device being to allow the engagement/disengagement of the transmission mechanism.

REFERENCES:
patent: 1849181 (1932-03-01), Francis
patent: 2986195 (1961-05-01), Landis
patent: 3236082 (1966-02-01), Beck et al.
patent: 4249407 (1981-02-01), Fogleman
patent: 4532787 (1985-08-01), Caporusso et al.
patent: 4760727 (1988-08-01), Van Landingham

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