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Metal Working

Method-and-apparatus-for-connecting-and-disconnecting-tubular-members

Back-up power tongs and method

Referring now to FIG. 1, there may be seen a simplified pictorial side view of apparatus embodying ...

Ratchet wrench for accommodating both English and metric-sized workpieces

Accordingly, it is an object of this invention to provide a rachet-type wrench which is serviceable ...

Machine tool automation

Referring now to the drawings wherein like reference characters designate like or corresponding ...

Power tongs

OF A PREFERRED EMBODIMENT OF THE INVENTION The power tong, as illustrated in the drawings, ...

Quick disconnect device for actuating unit and gripper head

OF AN EMBODIMENT OF THE INVENTION The present quick disconnect device for an actuating unit ...

Wide load rack for forklift

The instant invention fulfills the above stated need by providing a specialized rack which is ...

Tool transfer mechanism for machine tools

An article transfer housing is movably mounted on a frame for movement into and out of proximity ...

Motion conversion mechanism

Having described my invention in such clear, concise and exact terms as to enable those skilled in ...

Apparatus for machining components containing integrated circuits

I claim: 1. Apparatus for machining, particularly straightening and cutting leads of electronic ...

Screw tool

The object of the present invention is to simplify the construction of a screw tool of the type in ...

Method and apparatus for connecting and disconnecting tubular members

Details

Inventors: Mosing, Donald E.;
Assignee:
Primary Examiner: Larson; Lowell A.
Assistant Examiner:
Attorney, Agent or Firm: Matthews; Guy E.

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.

DETAILED DESCRIPTION It is a primary feature of the present invention to provide a novel power energized mechanism for making up and breaking out threaded pipe connections wherein pipe engaging drive devices are brought into rotating driving engagement with the pipe by being moved along a structure utilizing a curve such as uniform motion cam means of substantially uniform motion into frictional driving engagement with the pipe without penetrating, interference or deforming the outer surface of the pipe.
Other and further objects, advantages and features of this invention will become obvious to one skilled in the art upon an understanding of the illustrative embodiment about to be described and various advantages, not referred to herein, will occur to one skilled in the art upon employment of the invention in practice.

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