Tensioning handle for root-canalling instruments

Details Tensioning handle for root-canalling instruments Tensioning handle for root-canalling instruments

1990-10-30

1992-03-03

Wilson, John J.

Dentistry

Apparatus

Broach

433147, A61C 502, A61C 300

Patent

active

050927698

ABSTRACT:
Tensioning handle for a root-canalling instrument and comprising a grip (1) with an outside-threaded shank (2) at one end, an inside-threaded cap (3) that screws onto the shank, a bore (4) that extends axially through the shank and the cap, and a tensioner that surrounds a tool inserted in the bore and tightens around the shaft of the tool when the cap is screwed tight, characterized in that the tensioner comprises sleeves (10) that loosely surround the shaft (5) of the tool (6) and have opposing sloping surfaces (15 & 16) that displace them laterally when the cap is screwed on.

REFERENCES:
patent: 4251214 (1981-02-01), Schnall
patent: 4582489 (1986-04-01), Listl

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