Pipe clamping device

Details Pipe clamping device Pipe clamping device

1976-05-21

1977-08-16

Smith, Al Lawrence

Work holders

Holder inserted within work aperture

Expandable mandrel

B23P 1900

Patent

active

040422313

ABSTRACT:
A device for clamping into engagement with the inside of a pipe comprising central shaft, rotatable actuator members axially spaced on the shaft and journalled thereon, piston and cylinder type of hydraulic motors coupled to the axially spaced actuators for rotating the actuators, spaced frames fixedly mounted on the shaft, plunger members mounted for radial sliding movement in the frames, and coplanar links connected between the plungers and the spaced actuators for moving said plungers radially toward and away from the inside of said pipe. In one embodiment the spaced actuators are rotated simultaneously in opposite directions because they are connected to opposite ends of the hydraulic motors. In another embodiment separate hydraulic motors rotate the actuators independently of each other.

REFERENCES:
patent: 2853876 (1958-09-01), Majkrazak
patent: 3005619 (1961-10-01), Bowen
patent: 3644977 (1972-02-01), Valentine
patent: 3741457 (1973-06-01), Gwin et al.

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