Power tong device

Details Power tong device Power tong device

2006-06-09

2010-11-23

Hail, III, Joseph J (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057000, C081S057110, C081S057160, C081S057200

Reexamination Certificate

active

07836795

ABSTRACT:
A power tong (1) device, in which the power tong (1) includes two housing halves (2), pivotable relative to each other, the housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position, and in which a radially divided drive ring (6, 8), which is provided with hydraulically activated clamping dies (14) directed towards the centre axis (10) of the power tong (1), is placed in the housing halves, the drive ring (6, 8) being supported and connected to a driving motor (12) for the rotation of the drive ring (6, 8) about said axis (10), the drive ring (6, 8) being provided with at least one locking means (16) which is arranged to interconnect the parts of the drive ring (6, 8) in a releasable manner.

REFERENCES:
patent: 1871857 (1932-08-01), Martois
patent: 3799009 (1974-03-01), Guier
patent: 4423647 (1984-01-01), Toelke
patent: 4442736 (1984-04-01), True et al.
patent: 5626435 (1997-05-01), Wohlhuter
patent: 7281451 (2007-10-01), Schulze Beckinghausen
patent: 2005/0188794 (2005-09-01), Schulze-Beckinghausen
patent: 0339005 (1989-10-01), None
Written Opinion, Sep. 27, 2006, No PCT Office.

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