Manually operated pincer mechanism for pipelines

Details Manually operated pincer mechanism for pipelines Manually operated pincer mechanism for pipelines

1979-07-30

1981-01-06

Husar, Francis S.

Metal deforming

By tool-couple embodying nonplanar tool-face

With adjustable or replaceable section of tool-face

72448, 7245301, 72455, 100257, 251 5, B21J 1302

Patent

active

042429030

ABSTRACT:
Manually operated pincer mechanism for rapid shutoff of a pipeline that has developed a break or leak. The pincer mechanism is actuated by a manually operated hydraulic jack. The jaws are designed to shutoff small diameter steel pipe with the lower jaw in the upper position and with adapter members attached to both jaws with the lower jaw in the lower position is able to squeeze off plastic pipe up to a larger specified diameter. Removal of the plastic adapter jaws and with the lower jaw in the lower position permits booming down on patches for steel pipe up to a larger specified diameter for welding.

REFERENCES:
patent: 2098548 (1937-11-01), Kick
patent: 2439725 (1948-04-01), Frost
patent: 2502072 (1950-03-01), Bender
patent: 2742853 (1956-04-01), Knelson
patent: 3117615 (1964-01-01), Graven
patent: 3283699 (1966-11-01), Hawkins
patent: 3589668 (1971-06-01), Gill
patent: 3858431 (1975-01-01), Miller
patent: 3937050 (1976-02-01), Nicholson
patent: 4169412 (1979-10-01), Stelmasik
patent: 4197795 (1980-04-01), Hawkins

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