Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Reexamination Certificate
2006-06-30
2008-10-14
Howell, Daniel W (Department: 3726)
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Having tool-opposing, work-engaging surface
C408S110000
Reexamination Certificate
active
07435041
ABSTRACT:
A hole cutting assembly for cutting cylindrical conduits includes a base member having first and second V-shaped contact sections at opposite ends thereof. A linear base anchoring member is secured to the base member for encircling a cylindrical conduit and drawing both V-shaped contact sections of the base member against an outer surface of the cylindrical conduit. A support plate member extends perpendicularly from the base member in opposition to one V-shaped contact section. A bearing housing member, secured to the support plate member, includes a cylindrical passage having a cylindrical axis paralleling the support plate member. The cylindrical axis is positioned beyond one end of the base member, and the housing member includes at least two bearings within the cylindrical passage. A cylindrical arbor shaft member is rotatably and slidably mounted within the housing member's cylindrical passage. The shaft member includes a threaded end adjacent the base member and a hexagonal end opposite the base member, with the shaft member's threaded end adapted for securing a cylindrical cutting bit member thereto. Securing the hole cutting assembly to an outer surface of a conduit with the base anchoring member, and attaching a power drill to the arbor shaft member's hexagonal end provides rotation of a cylindrical cutting bit member secured to the threaded end of the arbor shaft member, thereby cutting a hole in the conduit.
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Howell Daniel W
Randall Tipton L.
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