Device for fixing a dental drill into a rotor

Details Device for fixing a dental drill into a rotor Device for fixing a dental drill into a rotor

1975-09-23

1977-03-22

Peshock, Robert

A61C 110

Patent

active

040128415

ABSTRACT:
A holder for a dental drill is formed by a helical spring drivingly connected to a driven rotor. The normal internal diameter of the spring is slightly less than the diameter of the shank of the drill to be used. Axial insertion of the drill into one end of the spring causes the spring to compress in length and thus increase in diameter sufficiently to receive the drill shank and frictionally grip the same. Means are provided for expanding the spring to release the drill.

REFERENCES:
patent: 2467606 (1949-04-01), Young
patent: 2564893 (1951-08-01), Gibbons
patent: 2570570 (1951-10-01), Lee

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