Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge
Patent
1975-09-18
1976-08-24
Simpson, Othell M.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having inversely angled cutting edge
408227, B23B 5100
Patent
active
039763889
ABSTRACT:
A hand tool for concurrently removing burrs from the inner edge and outer edge of the cut end of EMT conduit. The preferred embodiment of the tool consists of a tee-shaped body having a deburring element disposed at the end of each arm of the tee, permitting three sizes of conduit to be deburred. A deburring element consists of a generally conical projection from the body having a circular rim surrounding the base of the conical projection, with the axis of the rim coincident with the axis of the conical projection. The interior surface of the rim and the exterior surface of the conical projection acutely diverge with respect to the intersection of these surfaces. The intersection forms a circle having a diameter approximately equal to the mean diameter of the conduit to be deburred. The surfaces are serrated, forming cutting surfaces. In use, a cut conduit end is placed over the conical projection which serves to guide the end into contact with the serrated interior and exterior surfaces, and the tool is rotated with respect to the conduit, wherein deburring is quickly and easily accomplished. In using one deburring element, the other two elements and arms are utilized as a handle to grasp while operating the tool.
REFERENCES:
patent: 2470392 (1949-05-01), Gassman
patent: 2583246 (1952-01-01), Williams
patent: 3168799 (1965-02-01), Johnson
patent: 3802793 (1974-04-01), Simon
patent: 3917429 (1975-11-01), Ertley
Briggs W. R.
Simpson Othell M.
Wiggins Macdonald J.
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