Cam with Stop Surfaces
AssigneeVictaulic Company
InventorDouglas R. Dole
Life of this patent
Estimating the term…
Abstract
A device for cold working pipe elements has two or more cams, each having a gear which meshes with a pinion to turn all of the cams. Each cam has a cam surface with a region of increasing radius and may have a region of constant radius extending around a cam body. Each cam also has a traction surface extending around a cam body. A discontinuity in each cam surface is aligned with a gap in the traction surface of each cam. The discontinuities and gaps provide clearance for insertion and removal of the pipe element between the cams to form a circumferential groove when the cams are rotated. A cup adjacent the pinion is movable along the pinion axis to engage and disengage from a stop surface on one of the cams. Engagement between the cup and a stop surface prevents rotation of the cam.
Claims28
A cam for cold working a pipe element, said cam comprising:
- a cam body having an axis of rotation;
- a cam surface extending around said cam body, said cam surface comprising a region of increasing radius and a discontinuity of said cam surface, said radius being measured about and from said axis of rotation;
- a traction surface extending around said cam body, said traction surface comprising a plurality of projections extending transversely to said axis of rotation, said traction surface having a gap therein, said gap being aligned axially with said discontinuity of said cam surface;
- a first stop surface projecting from said cam body transversely to said axis of rotation, said first stop surface being positioned adjacent to said discontinuity of said cam surface.
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.
Dependencies are inferred from the claim text.