Metal working – Method of mechanical manufacture – Disassembling
Patent
1980-09-16
1983-02-08
Larson, Lowell A.
Metal working
Method of mechanical manufacture
Disassembling
81 5714, 81 5718, 81 572, 81 591, B25B 1700
Patent
active
043720269
ABSTRACT:
A power energized mechanism for connecting and disconnecting pipe connections and the like comprising a housing structure having interconnected therewith a rotatable drive gear that is rotated by means of a suitable motor. A pair of spaced external ring gear elements are interconnected with the rotary drive gear with the external gear teeth thereof disposed in interengaging relation with opposed pinion gears provided on a plurality of cam elements that are positioned in spaced relation about the ring gears. Each of the cam elements incorporates an intermediate cam section having defined thereon a pair of cam surfaces that are adapted respectively to engage pipe that is positioned within the receptacle defined by the cooperating gear and cam mechanisms. To minimize deformation of the pipe during pipe rotating operations, the cam surfaces that engage the pipe define uniform motion curve cams that have the effect of self-tightening to ensure restriction of the magnitude of frictional engagement with the pipe to only that necessary for accomplishing rotation of the pipe.
REFERENCES:
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patent: 1811666 (1931-06-01), Foster
patent: 2028876 (1936-01-01), Lotts
patent: 2657014 (1953-10-01), Webster
patent: 2834239 (1958-05-01), Mancini
patent: 3621739 (1971-11-01), Seablom
patent: 3698266 (1972-10-01), Mader
patent: 4060014 (1977-11-01), Turner
Larson Lowell A.
Matthews Guy E.
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