Twisting apparatus of root canal reamer or file material and met

Details Twisting apparatus of root canal reamer or file material and met Twisting apparatus of root canal reamer or file material and met

1984-07-03

1986-08-12

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

By individually non-deforming clamps

72371, 72 64, 76108T, B21D 1104

Patent

active

046048847

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.

REFERENCES:
patent: 274943 (1883-04-01), Hooker
patent: 430792 (1890-06-01), Taft
patent: 2457132 (1948-12-01), Delaney
patent: 2764042 (1956-09-01), Gotze
patent: 2901932 (1959-09-01), Erdelyi
patent: 3427844 (1969-02-01), Bergstrom
patent: 3427845 (1969-02-01), Evans

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