Dentistry – Apparatus – Hand manipulatable implement
Patent
1992-09-17
1994-03-22
Wilson, John J.
Dentistry
Apparatus
Hand manipulatable implement
81471, 433173, A61C 300, A61C 800, B25B 23153
Patent
active
052958310
ABSTRACT:
A torque wrench particularly suited for applying a selected maximum torque to a dental implant component is constructed of a single shaft of predetermined material and dimension with an undercut or relieved portion therein such that application of a predetermined torque to the dental component through the shaft produces a deformity in the shaft at the relief. The shaft is designed with one end to engage the implant component or device coupled thereto. Where the shaft is straight, the other end of the shaft is designed to engage a driver. Alternatively, the shaft is bent by ninety degrees so that the other end of the shaft acts as an integral lever arm. Preferably, the undercut in the shaft is diamond shaped such that it increases in width as it increases in depth and then decreases in width as it decreases in depth. The diamond shaped undercut reduces the likelihood that upon deformation the shaft will break and produce jagged edges and metal fragments.
REFERENCES:
patent: 2518886 (1950-08-01), Halvorsen
patent: 3331267 (1967-07-01), Tietge
patent: 3753625 (1973-08-01), Fabrizio et al.
patent: 3888144 (1975-06-01), Parsons
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patent: 4480997 (1984-11-01), Deutsch et al.
patent: 4838134 (1989-06-01), Ruland
patent: 5105690 (1992-04-01), Lazzara et al.
Nickerson Bruce L.
Patterson Chad J.
Smolowitz Richard A.
Gordon David P.
Impla-Med, Inc.
Lucchesi Nicholas D.
Wilson John J.
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