Pipe grooving device having flared cup
AssigneeVictaulic Company
InventorDouglas R. Dole
Life of this patent
Estimating the term…
Abstract
A pipe grooving device has a flared cup which surrounds a pipe end stop. The cup and the pipe end stop are mounted on a fixed pinion about which a carriage rotates. The carriage carries geared cams which engage the pinion and rotate synchronously when the carriage rotates relatively the pinion. The cams engage a pipe element received by the cup and form a circumferential groove in the pipe element. The cup and the pipe stop move independently of one another axially along a pinion shaft to actuate rotation of the carriage. The flared cup accommodates dimensional pipe diameter tolerances and mitigates pipe flare and maintains pipe roundness during the grooving process.
Claims24
A device for forming a circumferential groove in a pipe element, said device comprising:
- a pinion fixed against rotation about a pinion axis arranged coaxially with said pinion;
- a carriage surrounding said pinion, said carriage being rotatable about said pinion axis and defining an opening arranged coaxially with said pinion axis for receiving said pipe element;
- a cup positioned adjacent to said pinion, said cup having a sidewall arranged coaxially with said pinion axis and defining an interior, said sidewall having an inner surface, said inner surface have a first diameter located distal to said pinion and a second diameter located proximate to said pinion, said first diameter being larger than said second diameter, said interior facing said opening for receiving said pipe element, said cup being movable along said pinion axis toward and away from said pinion;
- a pipe end stop positioned within said interior between said first and second diameters, said pipe end stop being movable along said pinion axis toward and away from said pinion relatively to said cup;
- a stop spring acting on said pipe end stop and biasing said pipe end stop away from said pinion;
- a plurality of gears mounted on said carriage, each said gear being rotatable relatively to said carriage about a respective gear axis, at least one of said gears engaging directly with said pinion;
- a plurality of cam bodies, each said cam body mounted on a respective one of said gears;
- a plurality of first cam surfaces, each one of said first cam surfaces extending around a respective one of said cam bodies and engageable with said pipe element received within said opening, each one of said first cam surfaces comprising a region of increasing radius, each one of said first cam surfaces comprising a first discontinuity of said first cam surface.
Dependencies are inferred from the claim text.