Dual-torque winding and tightening tool

Details Dual-torque winding and tightening tool Dual-torque winding and tightening tool

1985-02-19

1985-11-05

Peshock, Robert

Dentistry

Apparatus

Having static product shaping surface

A61C 504

Patent

active

045510970

ABSTRACT:
A dual-torque winding tool for winding a coil of a retainerless dental matrix comprises a handle which can be held and rotated in the hand. A barrel is axially movable within a blind channel defined in the handle, with the handle being rotatable with and over the rotatable barrel. Two separate torque transmitting mechanisms are provided for establishing co-rotation between the handle and the barrel at two separate torque values. In one form of the invention the two separate torque values are established by two spring loaded balls which are under different biasing forces and which each can selectively engage into one of a single set of socket holes. Axial movement of the barrel for bringing one or the other ball into engagement with the socket holes establishes the selected torque value. Another form of the invention uses two separate sets of socket holes each having holes with a different diameter and engageable by a single spring loaded ball.

REFERENCES:
patent: 3411214 (1968-11-01), Lazarus
patent: 3852884 (1974-12-01), Lazarus
patent: 3921299 (1975-11-01), Lazarus

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