Cams for pipe grooving device
AssigneeVictaulic Company
InventorDouglas R. Dole
Life of this patent
Estimating the term…
Abstract
A device for forming circumferential grooves in pipe elements uses multiple geared cam bodies mounted on a carriage which rotates about a fixed pinion. The gears engage with the pinion which causes the geared cam bodies to rotate relative to the carriage. Traction surfaces and cam surfaces on the cam bodies traverse the outer surface of the pipe element and impress a circumferential groove therein. Each cam surface has a region of increasing radius and may have a region of constant radius. Second cam surfaces, positioned in spaced relation axially to the first cam surfaces, may also extend around the cam bodies. The second cam surfaces have a constant radius and limit flare of the pipe element.
Claims20
A plurality of cams for cold working a pipe element, said cams being rotated circumferentially about said pipe element, each said cam comprising:
- a cam body having an axis of rotation;
- a first cam surface extending around said cam body, said first cam surface comprising a first region of increasing radius and a first discontinuity of said first cam surface;
- a second cam surface extending around said cam body and positioned in spaced relation along said axis of rotation to said first cam surface;
- wherein
- moving around an outer circumference of said cam body, said second cam surface has a consistent spacing from said first cam surface along said axis of rotation.
A plurality of cams for cold working a pipe element, said cams being rotated circumferentially about said pipe element, each said cam comprising:
- a cam body having an axis of rotation;
- a first cam surface extending around said cam body, said first cam surface comprising a first region of increasing radius and a first discontinuity of said first cam surface, said first discontinuity being circumferentially aligned with said first region of increasing radius;
- a second cam surface extending around said cam body and positioned in spaced relation along said axis of rotation to said first cam surface.
Dependencies are inferred from the claim text.