Twisting apparatus of root canal reamer or file material and method for manufacturing root canal reamer or file
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United States of America Patent
Stats
-
Aug 12, 1986
Grant Date -
N/A
app pub date -
Jul 3, 1984
filing date -
Jul 4, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for the manufacture of a root canal reamer and a method of manufacture of the same. An apparatus for twisting reamer material has a triangular or rectangular cross-sectional opening, a chuck portion holding root part of taper-like reamer material and vice composed of a plurality of vice-claws capable of pressing side faces of reamer material while rotating. The distance between vice-claws and chuck is variable. The vice-claws adjacent to said vice are arranged alternately and are able to be moved back and forth in accordance with thickness of reamer material. The inside opening of vice varies corresponding to the sectional taper of the reamer material. The present invention also discloses a method of manufacturing a reamer which has an enlarged rake angle and a smaller relief angle than conventional reamers. This is accomplished by an inside opening dimension of the vice being a little larger than the sectional figure of the reamer material. When twisted, the twisting force is exerted adjacent to the angular edge of the face regarded as a relief face when the reamer material is twisted, and an angular portion of the edge of the reamer is squashed.
First Claim
Family
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Cited Art Landscape
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