Turning – Portable lathe for pipe turning
Patent
1995-11-29
1997-12-02
Howell, Daniel W.
Turning
Portable lathe for pipe turning
82128, 279123, 279152, 408105, 408137, B23B 322
Patent
active
056924224
ABSTRACT:
A squaring machine has an elongate housing with a rotatable spindle extending from one end thereof and attached to which is a tool for squaring the end of work piece. At the opposite end of the housing are first and second feed members, the first feed member in the form of a screw which is locked against axial movement within the housing, and the second feed member in the form a nut which is locked against rotation with respect to the housing. The feed nut is rotatably connected to an end of the spindle such that rotation of the feed screw will cause axial movement of the spindle. Also, the machine includes a first and second removable retainers, each of which has a pair of opposing jaws for clamping around a cylindrical work piece, however, the jaws of the first retainer are for grasping a work piece of a different size than the jaws of the second retainer. Within each of the pairs of jaws are a pair of replaceable shoes and each of the pairs of replaceable shoes is adapted to retain a work piece of a different size, such that the machine can be used to square a wide range of sizes of work pieces. In a second embodiment, a collet for retaining a work piece comprises a plurality of wedge segments, and each of the wedge segments has inner and outer surfaces which, when the segments are assembled, form a collet having a cylindrical bore and a frustoconical outer surface, and the segments are retained in aligned relationship within a nut attachable to the machine.
REFERENCES:
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patent: 4365528 (1982-12-01), Astle
patent: 4486129 (1984-12-01), Vowel
patent: 4739682 (1988-04-01), Birkestrand
patent: 5197362 (1993-03-01), Birkestrand
patent: 5351587 (1994-10-01), Griffin
patent: 5393176 (1995-02-01), Waring
The 300 Series Tube Squaring and Beveling Machines, Tri Tool, Inc. 2 pgs.
Howell Daniel W.
Kirkman Christopher
The E. H. Wachs Company
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