BORING TOOL FOR SERVICE TEE JOINT AND HOLE SAW

PROBLEM TO BE SOLVED: To provide a boring tool for boring a main pipe only by turning a wrench by fixed quantity, without changing the length of a hole saw or a shaft even for service tee joint having a long or short body. SOLUTION: This boring tool is composed of a cap 6 to be screwed into a body u...

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Bibliographische Detailangaben
Hauptverfasser:	TANAKA HIROAKI, KUROIWA MITSUYUKI, MIKAWA MITSUHARU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BORING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING TURNING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a boring tool for boring a main pipe only by turning a wrench by fixed quantity, without changing the length of a hole saw or a shaft even for service tee joint having a long or short body. SOLUTION: This boring tool is composed of a cap 6 to be screwed into a body upper part, and a shaft 15 turnably and slidably journalled to the cap 6 and turnably operated by a wrench; and has a connecting part 15a of a hexagonal cross section on the shaft 15, and an axis part 15b of a hexapetalous cross section on the lower part of the shaft 15. A interval between the connecting part 15a and the axis part lower end in set same as a difference between the fodies of service tee joints having different lengths of fovlies. In boring, the cap 6 is mounted on the body, and then the shaft 15 is pressed into the cap 6 and rotated slightly, to engage the connecting part 15a or a connecting part on the shaft part lower end with a hole saw upper part; after that the wrench is turnably operated to screw a hole saw 17.