Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
  • A61B17/1613—Component parts
  • A61B17/1622—Drill handpieces
  • A61B17/1624—Drive mechanisms therefor
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
  • A61C1/08—Machine parts specially adapted for dentistry
  • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
  • A61C1/142—Operating tool blocking means
  • A61C1/144—Operating tool blocking means constricting the operating tool, e.g. chuck
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
  • A61C1/08—Machine parts specially adapted for dentistry
  • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
  • A61C1/147—Tool-holders, i.e. operating tool holders, e.g. burr holders in a straight handpiece
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
  • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
  • B23B31/1072—Retention by axially or circumferentially oriented cylindrical elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
  • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
  • B23B31/10741—Retention by substantially radially oriented pins

Definitions

• the present invention relates to the field of medical instruments. More particularly, it relates to a coupling system for a hand-held instrument for rotating a removable tool at high speed, the end of which constitutes a bur or the like that can be used in dental cabinets or laboratories as well as in microsurgery.
• an instrument of this type is described, for example, in WO 2005/089666.
• the tail of the tool is held by a clamp disposed inside a hollow rotary shaft driven at its end by an electric motor or an air turbine and mounted by bearings in a fixed tubular sheath. Clamping and loosening of the clamp is done by rotating in one direction or the other a sleeve rotatably mounted on the sleeve.
• Such an instrument is generally made in three parts, namely a gripper mechanism with its shafts driven and leading for attachment of the tool, a motor mechanism for the rotary drive of the gripper mechanism and a coupling system of the machine. clamp mechanism with the motor mechanism. These three components must be able to be easily separated from each other to allow the same motor mechanism to operate different types of clamp mechanism and allow the replacement of the coupling system subjected to stresses that accelerate its wear.
• Downstream to designate respectively the end of the instrument from which the tool is rotated (right part of the drawing) and its end bearing the active tip of the tool (left part of the drawing).
• the drawing does not show the upstream and downstream parts of the instrument as these may be identical to those described in the document WO 2005/089666 cited above, which can be referred to to understand how the training of the tool is done.
• This comprises a hollow shaft 13 having, at its downstream end, two axially oblong windows 14 diametrically opposed.
• the upstream end 10 of the shaft of the clamp mechanism is slidably mounted in the downstream end of the shaft 13 and traversed by a removable connection pin 15 whose stroke is axially limited by the two windows 14.
• a split bushing 16, clipped around the portion of the shaft 13 which has these windows, ensures the holding in place of the pin 15.
• the upstream end of the shaft 13 is provided with two diametrically opposed oblong axial slots 17 (only one appearing in the drawing) which are dimensioned and shaped so as to receive two fins 18 (only one appearing in the drawing) which terminate the shaft. 11 of the motor mechanism.
• the number of diametrically opposed pairs of notches may be higher, in order to facilitate the insertion of the fins 18.
• the present invention is intended to provide a coupling system free from the disadvantages mentioned above.
• the invention relates to a system for coupling the shafts of the downstream clamp mechanism and the upstream motor mechanism of a hand-held instrument, for dental or surgical use, characterized in that it comprises:
• two diametrically opposite oblong windows made axially in the downstream end of said hollow shaft and serving to limit the stroke of said pin so as to define, for said hollow shaft and the shaft of the gripper mechanism, a first relative position for which the hollow shaft and the shaft of the gripper mechanism are at most distant and a second relative position for which they are brought close to the maximum, and a bushing fixed on the downstream end of said hollow shaft and whose length is such that, only in said second position, it reveals the pin to allow its insertion or extraction which respectively allow to connect or separate the coupling system and the clamp mechanism.
• Figure 2 is a longitudinal sectional view of such a coupling system, the elements common to the figure. 1 illustrating the prior art being designated by the same reference numerals.
• FIG. 2 shows in a, b and c the system according to the invention respectively:
• the removable bushing 16 is replaced by an immovable bushing 20 advantageously fixed by driving on the downstream end of the hollow shaft 13.
• this immovable sleeve 20 does not completely close the two oblong openings 14. Its length is such that:

Landscapes

• Health & Medical Sciences (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Dentistry (AREA)
• Engineering & Computer Science (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Mechanical Engineering (AREA)
• Surgery (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Surgical Instruments (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (1)

Family

ID=37533504

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (8)

• 2006
  • 2006-07-18 EP EP06117350A patent/EP1880683A1/de not_active Withdrawn
• 2007
  • 2007-06-21 RU RU2008135812/14A patent/RU2008135812A/ru not_active Application Discontinuation
  • 2007-06-21 CN CNA2007800131167A patent/CN101420912A/zh active Pending
  • 2007-06-21 US US12/293,279 patent/US20090075232A1/en not_active Abandoned
  • 2007-06-21 EP EP07730283A patent/EP1991136A1/de not_active Withdrawn
  • 2007-06-21 JP JP2009519897A patent/JP2009543625A/ja not_active Withdrawn
  • 2007-06-21 WO PCT/EP2007/056170 patent/WO2008009534A1/fr active Application Filing

Non-Patent Citations (1)

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