Metal deforming – By or with work-constrainer and/or manipulated work-forcer
Patent
1994-04-15
1995-12-12
Larson, Lowell A.
Metal deforming
By or with work-constrainer and/or manipulated work-forcer
72705, B21D 112
Patent
active
054739284
ABSTRACT:
A tool and process is provided for pulling a concave portion from a metal panel. The tool and process have a primary use of pulling dents from damaged panels of vehicles. The tool uses four independently hinged legs that are moved up and down by a central control screw and a continuous cable and pulley system. Each of the legs have a plurality of independently acting paired cutting members to hold an individual stud therebetween. The continuous cable also serves the functions of providing a profile of the original shape of the panel and triggering the cutting members to sever the studs. The process involves marking specific points of the dented surface; welding studs to the dented surface at the marked points; inserting the multi-legged tool down over the studs such that each stud is captured and held between a pair of cutting members; turning the screw to cause a lifting of the legs which causes the studs and dented surface to be lifted; lifting each stud upwards until a portion of the dented surface contacts against the cable; triggering the cutting members to sever the stud thereby providing an independent release of the tool from the stud; and finally, pulling up all of the dent until all of the studs are cut.
REFERENCES:
patent: 3835692 (1974-09-01), Hoffman
patent: 4026139 (1977-05-01), Glaser et al.
patent: 4116035 (1978-09-01), Malarsky
patent: 4930355 (1990-06-01), Ishihara
"Dent Fix", Mar. 1984; 8 pages.
Craine Dean A.
Larson Lowell A.
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