Powered high speed rotary surgical handpiece chuck and tools the

Details Powered high speed rotary surgical handpiece chuck and tools the Powered high speed rotary surgical handpiece chuck and tools the

1994-09-29

1997-06-03

Dawson, Glenn

Surgery

Instruments

Cutting, puncturing or piercing

408226, A61B 1732

Patent

active

056349335

ABSTRACT:
A replaceable rotary patient tissue working tool and a high speed rotational surgical handpiece having a centrifugal chuck for axial push-in chucking and pull-out release of such a tool includes a chuck including a centrifugal locking member with a mass portion located on one side of a rotational axis of a drive shaft. The working tool includes an elongate shank, patient tissue working structure at a front end of the shank and mounting structure at the rear end of the shank. The mounting structure includes several plateaus and a ramped hill. One radially depressed plateau is engageable by the centrifugal locking member.

REFERENCES:
patent: 3564948 (1971-02-01), Pomernacki
patent: 5167476 (1992-12-01), Lafferty et al.
patent: 5403134 (1995-04-01), Andersson et al.
"Command2 MicroElecric System" Maintenance Manual & Operating Instructions: Photocopy of p. 14, Figures 19 and 20 show prior art shanks A, B and C Jul. 1994.
Sketch A (shank A pictorial view) Jul. 1994.
Photocopy of a cross sectional view of a prior high speed rotational surgical handpiece including a chuck of the kind used with above discussed p. 14, Figure 20 tool shank A Jul. 1994.
Photocopy of brochure No. 1000-133 Rev C Jul. 1994 entitled Command 2 Oral and Maxillofacial, pp. 1-4 Jul. 1994.

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