Internal clamping of pipes

Details Internal clamping of pipes Internal clamping of pipes

1982-03-29

1984-08-07

Watson, Robert C.

Work holders

Holder inserted within work aperture

Expandable mandrel

B23Q 314

Patent

active

044639384

ABSTRACT:
An internal clamp mechanism for use in welding two pipes together in end to end prolongation has a pair of axially spaced, parallel, radially expansible and contractile clamp members coupled to one another in such manner as to enable one of the clamp members to be shifted bodily transversely of the other. Shifting of the one clamp member is effected by a plurality of fluid pressure rams operable independently of one another. The ability of the one clamp member to be shifted transversely of the other enables the pipe accommodating the shiftable clamp member to be axially aligned with the other pipe and to distribute any difference in wall thickness between the two pipes over the entire circumference thereof.

REFERENCES:
patent: 2741206 (1956-04-01), Stevenson
patent: 3031994 (1962-05-01), Clark
patent: 3561320 (1971-02-01), Nelson
patent: 3711938 (1973-01-01), Warren et al.

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