Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Reexamination Certificate
2005-02-22
2005-02-22
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having axial, core-receiving central portion
C408S068000, C408S24100G, C408S11500B
Reexamination Certificate
active
06857830
ABSTRACT:
A roof core-drilling apparatus and drilling guide adapted to be used in combination with a rotary drive means in which the mandrel portion of the roof core-cutter operates not only to mechanically connect the saw body to the drive means for cutting the core, but also as a plunger for ejecting the core from the saw body when the drilling operation is completed. The core cutting guide provides a stable platform for guiding the roof core cutter during operation. The saw teeth on the outer edge of the saw body are angled to cut through the work material in such a manner as to facilitate the ejection of the core material from the saw body after the roof coring operation is complete.
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Red Dragon CC501 Core Cutter; Red Dragon Roofing Torches and Equipment Catalog Nbr. 1099; p. 12.
Howell Daniel W.
Litman Richard C.
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