MEDICAL HAND-PIECE

WIPO Patent Application WO/2010/128131

A3

The invention relates to a medical, especially dental, hand-piece (1, 1'), comprising: an instrument retaining/release device (2) comprising a hollow shaft (3), which can be set in a drive motion for receiving a treatment instrument (4), wherein the hollow shaft (3) extends along a center axis (5) and has an instrument receiving orifice (6); a first retaining unit (7) and a second retaining unit (8), which is separate from the first retaining unit (7) and in relation to the center axis (5) is axially spaced from the first retaining unit (7), wherein both retaining units (7, 8) are designed to axially secure a treatment instrument (4) received in the hollow shaft (3) and to transmit a torque to the treatment instrument (4), and wherein both retaining units (7, 8) each have at least one shaped element (9, 10) and a borehole (12, 13) which penetrates the outside wall (11) of the hollow shaft (3) and in which the at least one shaped element (9, 10) can be received such that it protrudes through the borehole (12, 13) into the inside of the hollow shaft (3); a locking sleeve (14) which interacts with the shaped elements (9, 10), can be moved relative to the hollow shaft (3) and surrounds the hollow shaft (3), and an actuating element (15) interacting with the locking sleeve (14) for moving or displacing the locking sleeve (14).

WAGNER HANNES (AT)
TEUFELBERGER GUNTHER (AT)
SPITZAUER JOSEF (AT)

PCT/EP2010/056236

January 06, 2011

May 07, 2010

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W & H DENTALWERK BUERMOOS GMBH (AT)
WAGNER HANNES (AT)
TEUFELBERGER GUNTHER (AT)
SPITZAUER JOSEF (AT)

A61C1/14; A61B17/16; B23B31/02

US5584689A	1996-12-17
EP0820734A1	1998-01-28
DE3012240A1	1981-10-08

BENDA, Ralf (Bürmoos, AT)

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