Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Clamp structure constitutes sole initial metal-deforming...
Patent
1978-12-08
1980-07-08
Larson, Lowell A.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Clamp structure constitutes sole initial metal-deforming...
269217, B21D 4102
Patent
active
042111030
ABSTRACT:
Lower and upper split collars are positioned in engagement with the lower and upper cylindrical surfaces of a pipe and these collars in turn held in lower and upper clamp members. The exterior surfaces of the split collars in engagement with the interior surfaces of the clamp members have decreasing diameters from intermediate points towards opposite ends to define oppositely directed slopes. The interior engaging walls of the clamp members with the split collars are similarly tapered. When a pulling or pushing force is exerted on the pipe between the split collars, a camming action against the exterior walls of the collars is effected by the clamps urging the collars radially inwardly to more tightly grip the pipe so that the pipe is held from axial movement in either direction.
REFERENCES:
patent: 1935714 (1933-11-01), Hummell
patent: 2438999 (1948-04-01), Hartley et al.
patent: 2757523 (1956-08-01), Schmid
patent: 2993522 (1961-07-01), Temple et al.
patent: 4108478 (1978-08-01), Lynch
American Machine & Hydraulics Inc.
Larson Lowell A.
Pastoriza Ralph B.
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