Break down tong apparatus

Details Break down tong apparatus Break down tong apparatus

1996-03-27

1998-06-02

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5736, 81 5741, B25B 1350

Patent

active

057585539

ABSTRACT:
A tong apparatus is provided for gripping a pipe. The apparatus includes a base and a housing coupled to the base. The housing is formed to include an interior region having a top opening. The apparatus also includes a jaw assembly extending through the top opening and into the interior region of the housing. The jaw assembly includes a lower clamp portion having a lower jaw, a linkage having a lower end coupled to the lower clamp portion and an upper end, and a cylinder having a movable piston. The cylinder is coupled to the upper end of the linkage. The apparatus further includes an upper clamp portion having an upper jaw, the upper clamp portion being coupled to the piston, and at least one removable stop extending through the housing adjacent the top opening. The at least one stop is located between the upper clamp portion and the cylinder to provide a mechanical stop for engaging the upper clamp portion upon retraction of the piston so that further retraction of the piston positively drives the cylinder, the linkage, and the lower clamp portion downwardly relative to the housing to disengage the lower jaw from the pipe.

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