Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1985-03-01
1987-05-26
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
With testing or indicating
7386229, 7386224, B23Q 1700, G01L 302, B25B 2314
Patent
active
046673890
ABSTRACT:
An apparatus (10) and method is disclosed for connecting a pipe (12) and a test plug (28) comprising a carriage assembly (14) positioned on a base (16) that is capable of horizontal and vertical movement relative to base (16). Opposed pairs of fluid operated cylinders (56) are provided on opposite sides of carriage assembly (14) that support carriage assembly (14) on base (16) for relative vertical movement. A fluid control system associated with the cylinders (56) is selectively operated in two modes, an open pressure balanced float mode to permit relatively free lateral movement between the pipe (12) and test plug (28) for axial alignment, and a closed torque mode provided during make-up, for immediately detecting from an increase in fluid pressure in the cylinders (56) any excessive torque or misalignment of test plug (28) and pipe (12) resulting in a vertical deflection of the carriage assembly (14) thereby indicating when thread damage may be occurring. A change in fluid pressure in cylinders (56 ) which results from the vertical deflection of carriage assembly (14) is immediately registered or monitored by pressure monitors (118) to permit an operator to monitor the torque occurring during make-up.
REFERENCES:
patent: 2216563 (1940-10-01), Cartier
patent: 3096643 (1963-07-01), Essenmacher
patent: 3229510 (1966-01-01), Bodemeijer
patent: 4176436 (1979-12-01), McCombs et al.
patent: 4259869 (1981-04-01), Carlin
patent: 4416147 (1983-11-01), Hasha
patent: 4502323 (1985-03-01), Watase et al.
Goldberg Howard N.
Nichols Steven
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