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US 9,481,024 B1Granted
Pipe joining
OwnerDavor Petricio Yaksicinventor
Life of this patent
Estimating the term…
Abstract
Pipe joining compresses sleeves on abutted pipe ends. The sleeves are deformed beyond elastic limits, and the pipe ends are moved inward and exert outward forces on the sleeves. A machine has racks and an assembly of radial geared rollers which turn and compress the sleeves with grooves surfaces. Assemblies of fixed racks and assemblies of rollers on axles relatively move by hydraulic power, causing the rollers to turn and compress the sleeves.
Claims20
Apparatus for joining pipes, comprising:
- a frame surrounding pipes to be joined including a first cylindrical part and a second cylindrical part surrounding the first cylindrical part,
- racks mounted on the first cylindrical part of the frame,
- rollers rotatably mounted on the second cylindrical part of the frame,
- the first cylindrical part and the second cylindrical part of the frame movable with respect to each other,
- gear teeth formed on the rollers in contact with the racks,
- concave surfaces on the rollers facing the pipes,
- a driver connected to the frame relatively moving the first and second cylindrical parts of the frame, relatively moving the racks and rollers, rotating the rollers with the gear teeth in contact with the racks, and moving the concave surfaces toward the pipes for joining the pipes.
4 more elements
A method of joining pipes, comprising:
- providing a frame surrounding pipes to be joined including a first cylindrical part and a second cylindrical part surrounding the first cylindrical part,
- providing spaced annular outer end plates on the first cylindrical part of the frame,
- providing connectors on the first cylindrical part between the outer end plates,
- providing inward facing racks on the connectors,
- providing a roller mounting plate mounted on the second cylindrical part of the frame relatively movable with respect to the end plates,
- providing rollers mounted on the roller mounting plate,
- providing gear teeth on the rollers for engaging the racks,
- providing concave contact surfaces on the rollers opposite the gear teeth,
- providing a driver for relatively moving the roller mounting plate and the second cylindrical part with respect to the end plates and the first cylindrical part,
- juxtaposing ends of the pipes to be joined,
- providing a sleeve on ends of the pipes to be joined,
- contacting the sleeve with the concave contact surfaces on the rollers,
- driving the roller mounting plate with respect to the end plates,
- rotating the rollers with the gear teeth and the racks, and
- compressing the sleeve on the juxtaposed ends of the pipes to be joined by rolling the concave contact surfaces on the rollers along the sleeve and towards the pipes, and thereby joining the pipes with the sleeve.
12 more elements
Dependencies are inferred from the claim text.