Title:
CUTTING/EXPANDING TOOL
Document Type and Number:
Japanese Patent JP3217403
Kind Code:
B2
Abstract:
PURPOSE: To prevent the rotation of a tool for cutting an existing main pipe and expanding it so that a main pipe to be exchanged is passed through the existing main pipe by supporting a guide roller an a cutter by a supporting body having a guide side and a cutting side.
CONSTITUTION: A tool is provided with a rod-like supporting member 11, and pulled in an existing main pipe by being pulled through a wire, etc., with one end connected to a screw eye 12. A threaded cutter ring 14 is provided on a rear end part of a supporting rod 11 to enable the coupling with an expander 95. A plurality of rectangular notches 17 are formed in an upper part of the supporting rod 11 along the longitudinal direction, and a guide roller 16 is pivotably supported thereby so as to be projected from an outer circumferential surface of the supporting rod 11. A plurality of similar notches are formed in a lower part of the supporting rod 11, and a notch wheel 22, first to third cutter wheels 25, 29, 32 with progressively increasing diameter, and a deburring member 36 are pivotably supported in this order from their forward side.
Inventors:
Gerald Roccower
Joseph J. Malazo
Joseph J. Malazo
Application Number:
JP27087491A
Publication Date:
October 09, 2001
Filing Date:
October 18, 1991
Export Citation:
Assignee:
Brooklyn union gas
International Classes:
B23D21/02; B26D3/00; E21B7/30; E21B29/00; F16L1/024; F16L55/165; (IPC1-7): B23D21/02; B26D3/00; F16L1/024
Domestic Patent References:
| JP5345599U |
Other References:
【文献】米国特許3181302(US,A)
Attorney, Agent or Firm:
Masao Okabe (6 others)