Stop for the shaft of a root-canal instrument

Details Stop for the shaft of a root-canal instrument Stop for the shaft of a root-canal instrument

1975-01-22

1976-06-15

Peshock, Robert

A61C 502

Patent

active

039627918

ABSTRACT:
A stop to prevent the insertion of the shaft of a root-canal instrument too far into a tooth comprises a housing formed with a throughgoing passage and a compression spring in the passage having an inner diameter smaller than the outer diameter of the shaft. This stop is slipped over the shaft and the spring tightly grasps the shaft so as to impede sliding of the stop therealong. The compression spring may be loosely received within a chamber formed within the housing, or may be imbedded in a block of synthetic-resin material constituting the housing. A two-part housing may be used one part of which is connected to one end of the spring and the other part of which is connected to the other end of the spring so that rotation of these two parts relative to each other allows the spring to be loosened from the shaft to allow easy sliding of the stop therealong.

REFERENCES:
patent: 1035239 (1912-08-01), Rosenthal
patent: 1417237 (1922-05-01), Evans

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