Self-tightening pull clamp for attaching to sheet metal flanges

Details Self-tightening pull clamp for attaching to sheet metal flanges Self-tightening pull clamp for attaching to sheet metal flanges

1977-08-10

1979-04-10

Lanham, C. W.

Metal deforming

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

72705, 294116, B21D 112, B25B 508

Patent

active

041482107

ABSTRACT:
A pull clamp is provided for attaching to sheet metal flanges for transmission of pulling forces to the sheet metal, particularly in collision repair operations. The clamp comprises a pair of opposed clamping jaws adapted to be tightened against each other by bolts and have at one end opposite clamping surfaces for engagement with the sheet metal flange, the jaws furthermore enclosing a connecting member for coupling to a pulling means, said member including a conical wedge element for exerting a spreading-apart action of the inner surfaces of the jaws and hence through the bolts increase the clamping force between the clamping surfaces of the jaws in proportion to the pull of the pulling means. According to the invention the wedge element is constituted by an annular body with conical end surfaces and a control opening therethrough accommodating a pin which centrally extends transversely through both jaws with great radial clearance in holes in said jaws and outwardly of the latter carrying a pivotable yoke for coupling to the pulling means.

REFERENCES:
patent: 1556394 (1925-10-01), Zange
patent: 3276237 (1966-10-01), Transue
patent: 3610022 (1971-10-01), Lincourt
patent: 3696653 (1972-10-01), Mojelski
patent: 3827279 (1974-08-01), Buske
patent: 3955249 (1976-05-01), Shiozaki
patent: 3986746 (1976-10-01), Chartier
patent: 4037456 (1977-07-01), Jarman

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