Dent straightening tool

Details Dent straightening tool Dent straightening tool

1979-05-07

1980-11-04

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Having unitary tool-face

72705, 85 46, B21D 112

Patent

active

042312477

ABSTRACT:
A dent straightening tool having a manually graspable handle affixed to one end of an elongate shaft and a work piece engaging, helically threaded member affixed to the opposite end of the shaft. The threaded member has a substantially constant radius root with a blunt tip provided at the distal end of the root. The thread begins from a minimum radius at the blunt tip and then progressively increases in radius along the length of the root to attain a size substantially larger than the radius of the root so that the depth of the thread is substantially deeper than the radius of the root. Also, the flat length of the thread, as measured along the root, is at least one-half of the pitch length of the thread.

REFERENCES:
patent: 1114135 (1914-10-01), Hafertep
patent: 2005672 (1935-06-01), Chaffee
patent: 2172258 (1939-09-01), Place
patent: 2251495 (1941-08-01), Owens
patent: 2791926 (1957-05-01), Guyton
patent: 3100336 (1963-08-01), Fannin
patent: 3109691 (1963-11-01), Burkhardt
patent: 3878709 (1975-04-01), Chartier
patent: 3977230 (1976-08-01), Jones
patent: 4034594 (1977-07-01), Morgan
patent: 4122699 (1978-10-01), Logsdon

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