Pipe Grooving Device
AssigneeVictaulic Company
InventorDouglas R. Dole
Life of this patent
Estimating the term…
Abstract
A pipe grooving device having a plurality of geared cams uses synchronizing gears, each of which meshes with two of the geared cams, to synchronize the rotation of the cams which engage the pipe element to form the groove. The position of the groove relative to the end of the pipe is controlled by a stop body which incorporates a plate mounted ring which engages and disengages with a pipe stop surface on one or more of the cams to limit or permit cam rotation. The pipe stop body is positioned within a cup which receives the pipe element. The cup limits pipe end flare and limits the tendency of the pipe to go out of round during the grooving process. The device mounts on a powered chuck which turns the pipe element.
Claims34
A device for cold working a pipe element, said device comprising:
- a housing;
- a plurality of cam gears mounted within said housing, each one of said cam gears being rotatable about a respective one of a plurality of first axes of rotation, said first axes of rotation being parallel to one another, said cam gears being positioned about a central space for receiving said pipe element;
- a plurality of cam bodies, each said cam body mounted on a respective one of said cam gears;
- a plurality of cam surfaces, each one of said cam surfaces extending around a respective one of said cam bodies and being engageable with said pipe element received within said central space, each one of said cam surfaces comprising a region of increasing radius and a discontinuity of said cam surface, each one of said radii being measured from a respective one of said first axes of rotation;
- a traction surface extending around at least one of said cam bodies, said traction surface comprising a plurality of projections extending outwardly from said at least one cam body, said traction surface having a gap therein, said gap being aligned axially with said discontinuity of said one cam surface surrounding said at least one cam body;
- an engagement assembly positioned within said central space, said pipe element contacting said engagement assembly upon insertion of said pipe element into said central space;
- a plurality of synchronization gears mounted within said housing, each one of said synchronization gears being rotatable about a respective one of a plurality of second axes of rotation, said second axes of rotation being parallel to said first axes of rotation;
- wherein
- each one of said synchronization gears meshes with two of said cam gears.
Dependencies are inferred from the claim text.