Manually operable swivel tube bender

Details Manually operable swivel tube bender Manually operable swivel tube bender

1988-02-09

1989-05-09

Jones, David

Metal deforming

By or with work-constrainer and/or manipulated work-forcer

Comprising lever manipulated to force work

72388, 72459, B21D 1104

Patent

active

048277550

ABSTRACT:
A tube bender having a swivel connection of the handle to the shoe for facilitating readjustment of the handle in providing tube bends of greater than 90.degree., while avoiding crossover of the tube handle with the mandrel handle. The shoe handle includes a cylindrical extension rotatably received in a socket in the shoe and structure is provided for automatically disposing the handle in either of preselected dispositions. The extension is caused to be disposed in an overcenter arrangement in the preselected dispositions so as to cause forces generated on the shoe handle during the bending operation to more firmly lock the handle in the preselected disposition. A friction washer is provided for biasing the shoe handle to provide releasable retention thereof in the preselected positions.

REFERENCES:
patent: 1075837 (1913-10-01), Malo et al.
patent: 1324670 (1919-12-01), Hawes
patent: 2864272 (1958-12-01), Swanson
patent: 2908193 (1959-10-01), Gryniewicz
patent: 2979976 (1961-04-01), Franck
patent: 3190105 (1972-08-01), Strybel
patent: 3685335 (1965-06-01), Kowal
patent: 4403496 (1983-09-01), Kowal

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