Long hole saw for composite material insulation panel
OwnerJong-Kil Kwon, Yun-Jeong Choi +3inventors
InventorsJong-Kil Kwon, Yun-Jeong Choi, In Kwon, Jin Kwon, Hyeon Kwon
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Abstract
The present invention relates to a long hole saw for a composite material insulation panel for easily cutting a steel sheet of a hard material and a heat insulator such as Styrofoam or urethane of a soft material in one direction, wherein it is possible to reduce shaking vibrations generated during the cutting and to easily, precisely, and stably drill holes when drilling holes for the installation of pipes, conduits, etc. into a composite material insulation panel used for wall or roof construction of a building.
Claims6
A long hole saw for an insulated composite panel, comprising:
- a cutting part (10) provided with a cylindrical body (11) whose interior is hollow having a threaded through hole (110) formed on a center of top thereof, a plurality of first cutting blades (12) equally spaced apart from each other on a lower end periphery of the cylindrical body (11) in a circumferential direction of the cylindrical body (11), and a plurality of second cutting blades (13) equally spaced apart upward from the plurality of first cutting blades (12) by a given height in the circumferential direction of the cylindrical body (11) in such a manner as to allow a lower portion of each of the plurality of the second cutting blades (13) to be diagonally cut on the cylindrical body (11) in a reverse rotating direction and to thus protrude inward from the cylindrical body (11);
- and
- a balancing support part (20) provided with a coupling rod (21) having a screw thread formed on a lower side periphery thereof in such a manner as to be screw-coupled to the through hole (110) of the cylindrical body (11), a support (22) extended downward from the coupling rod (21) by a given length and having a pressurizing portion (220) formed on a lower end periphery thereof in such a manner as to be reduced in diameter like a conical shape, and a drill (23) with a given length disposed on a lower end periphery of the pressurizing portion (220).
Dependencies are inferred from the claim text.