초록 ▼

A roller tool for forming an outwardly projecting ridge in a pipe, which tool is usable with the chuck or power head of a conventional pipe working machine, and a carriage suitable for mounting the roller tool and other tools on the pipe working machine. The roller tool has a female roller rotatably

A roller tool for forming an outwardly projecting ridge in a pipe, which tool is usable with the chuck or power head of a conventional pipe working machine, and a carriage suitable for mounting the roller tool and other tools on the pipe working machine. The roller tool has a female roller rotatably supported on a movable frame. The frame is fixed to the carriage, which in turn is pivotally mountable on the carriage supporting rails of the pipe working machine. One rail is fully encircled by a closed socket formed in the carriage, so that the roller tool cannot spontaneously disengage from the host pipe working machine. The other rail is partially encircled by an open socket formed in the carriage. The roller tool can pivot about the closed socket between an operational position and a standby position enabling the grooving machine to be utilized for grooving with the roller tool still attached. The roller tool has plural female rollers configured differently to provide ability to form the ridge at different distances from the end of the pipe being worked. In an alternative embodiment, conventional pipe working tools are used with the novel carriage.

대표청구항 ▼

[ I claim:] [1.]1. A ridge forming machine for forming an outwardly projecting ridge circumferentially on the wall of a pipe, wherein said ridge forming machine is useable with a rotatable chuck of a pipe working machine for working pipes, comprising:a carriage having attachment elements comprising:

[ I claim:] [1.]1. A ridge forming machine for forming an outwardly projecting ridge circumferentially on the wall of a pipe, wherein said ridge forming machine is useable with a rotatable chuck of a pipe working machine for working pipes, comprising:a carriage having attachment elements comprising: a first socket and a second socket disposed to engage the pipe working machine such that said carriage is moveable selectively to an operational position and to a standby position,a frame fixed to said carriage,a tool holder slidably carried on said frame and movable towards and away from the axis of rotation of the chuck,a first roller rotatably mountable on said tool holder such that said first roller rotates on an axis parallel to the axis of rotation of the chuck, anda roller position adjuster disposed to urge said first, rotatable roller selectively towards and away from the axis of rotation of the chuck and to selectively impose pressure on said first roller; anda second roller removably engageable with the rotatable chuck of the pipe working machine and adapted to slidably receive a pipe thereover, wherein said second roller is oppositely configured from and corresponds to said first roller, and wherein said first roller and said second roller are dimensioned and configured to entrap the wall of said pipe therebetween such that rotation of the pipe by said second roller progressively forms the outwardly projecting ridge on the pipe in response to increasing pressure on said first roller from said roller position adjuster,wherein said first roller moves away from the axis of rotation of the chuck when said ridge forming machine is moved from said operational position to said standby position, and wherein said sockets are dimensioned and configured to constrain said carriage against disengagement from the pipe working machine by moving in any direction except a direction parallel to the axis of rotation of the chuck, and enabling said carriage to fully disengage from the pipe working machine by moving only in a direction parallel to the axis of rotation of the chuck.