Handpiece for dental or surgical use

Details Handpiece for dental or surgical use Handpiece for dental or surgical use

2007-05-08

2007-05-08

Robert, Eduardo C. (Department: 3732)

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

C433S128000, C433S127000, C433S114000

Reexamination Certificate

active

11046705

ABSTRACT:
At the front, a handpiece (1) has a clamp (10) fitted to tightly grip the shank of a removable tool housed in guide holes (23, 25). The clamp has two or more levers (26) attached to an annular section (22) of the clamp by elastic joints (27), each of which has a gripping jaw (20) to grip the tool shank. On each lever, the gripping jaw (20) is located much closer to the joint (27) than to a supporting surface, on which a tightening mechanism (17) exerts a centripetal force so that the lever multiplies this force. The tightening mechanism preferably has a sliding sleeve (40) having a conical inside surface (44), which produces the force at the levers of the clamp by means of balls (45) housed in the holes of a hollow rotatable shaft (11).

REFERENCES:
patent: 3631597 (1972-01-01), Lieb et al.
patent: 3893242 (1975-07-01), Lieb et al.
patent: 3902248 (1975-09-01), Bareth
patent: 4260381 (1981-04-01), Eibofner et al.
patent: 5688122 (1997-11-01), Teufelberger et al.
patent: 1 191 869 (1974-02-01), None
patent: 2 723 306 (1996-02-01), None

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