Cam Grooving Machine with Cam Stop Surfaces

A cam for cold working a pipe element, said cam comprising:

• a cam body having an axis of rotation;
• a plurality of cam surfaces extending around said cam body, each said cam surface comprising a respective region of increasing radius, said radii being measured from and about said axis of rotation, all of said cam surfaces being circumferentially aligned with one another;
• a respective discontinuity of said cam surfaces being positioned between each of said cam surfaces;
• at least one stop surface projecting from said cam body transversely to said axis of rotation, said stop surface being positioned adjacent to one of said respective discontinuities of said cam surfaces.

A device for cold working a pipe element, said device comprising:

• a housing;
• a plurality of gears mounted within said housing, each one of said gears being rotatable about a respective one of a plurality of axes of rotation, said axes of rotation being parallel to one another, said 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 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 about and from a respective one of said axes of rotation;
• at least one traction surface extending around one of said cam bodies, said at least one traction surface comprising a plurality of projections extending transversely to said axis of rotation of said one cam body, said at least one traction surface having a gap therein, said gap being aligned axially with said discontinuity of one said cam surface surrounding said one cam body;
• at least one stop surface projecting from one of said cam bodies transversely to said axis of rotation of one of said gears, said at least one stop surface positioned adjacent to said discontinuity of said cam surface on said one cam body;
• a pinion mounted within said central space within said housing, said pinion meshing with said plurality of gears and being rotatable about a pinion axis oriented parallel to said axes of rotation;
• a cup adjacent said pinion, said cup receiving said pipe element upon insertion of said pipe element into said central space;
• wherein said cup is movable relatively to said housing along said pinion axis between a first position, wherein said cup engages said stop surface thereby preventing continuous rotation of said cam bodies, and a second position, wherein said cup is out of engagement with said stop surface, thereby permitting continuous rotation of said cam bodies.

A device for cold working a pipe element, said device comprising:

• a housing;
• a plurality of gears mounted within said housing, each one of said gears being rotatable about a respective one of a plurality of axes of rotation, said axes of rotation being parallel to one another, said 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 gears;
• a plurality of cam surfaces extending around each said cam body, each said cam surface being engageable with said pipe element received within said central space and comprising a region of increasing radius, said radii being measured about and from one of said axes of rotation, all of said cam surfaces on each said cam body being circumferentially aligned with one another;
• a respective discontinuity of said cam surfaces being positioned between each of said cam surfaces on each said cam body;
• at least one stop surface projecting from one of said cam bodies transversely to said axes of rotation of said one cam body, said at least one stop surface being positioned adjacent to a discontinuity of said one cam surface;
• a pinion mounted within said central space within said housing, said pinion meshing with said plurality of gears and being rotatable about a pinion axis oriented parallel to said axes of rotation;
• a cup adjacent said pinion, said cup receiving said pipe element upon insertion of said pipe element into said central space;
• wherein said cup is movable relatively to said housing along said pinion axis between a first position, wherein said cup engages said at least one stop surface thereby preventing continuous rotation of said cam bodies, and a second position, wherein said cup is out of engagement with said at least one stop surface, thereby permitting continuous rotation of said cam bodies.