Including Clutch Or Variable Transmission Patents (Class 433/105)
  • Patent number: 9987716
    Abstract: A machine tool brake device of a portable machine tool includes at least one magnetic-field-type brake unit that is configured to brake a spindle and/or a machining tool when the magnetic-field-type brake unit is in at least one braking position. The machine tool brake device further includes at least one spindle immobilization unit that is configured to immobilize the spindle when the spindle immobilization unit is in at least one immobilization position. The machine tool brake device also includes at least one activation unit that is configured to transfer the magnetic-field-type brake unit into the braking position and to enable an automatic transfer of the spindle immobilization unit into the immobilization position.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: June 5, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Joerg Maute, Florian Esenwein
  • Patent number: 9360064
    Abstract: A power tool braking device, in particular a portable power tool braking device, for a portable power tool has at least one magnetic field braking unit. The power tool braking device comprises at least one drive unit which has at least one drive element, on which at least one braking element of the magnetic field braking unit is arranged.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: June 7, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Peter Nadig, Sebastian Laber, Florian Esenwein, Joachim Heizmann
  • Patent number: 8172572
    Abstract: A dental tool displacement apparatus for use with a motorized power handle to displace a dental tool includes a tool holder having a receptacle for receiving the dental tool, and a drive arrangement. The drive arrangement defines a transmission from the motorized power handle to the tool holder such that the tool holder undergoes reciprocating motion parallel to the tool axis at a first frequency of oscillations per minute and rotates about the tool axis at a second frequency of rotations per minute. In some cases, the two types of motion are generated by an eccentric drive pin engaging an annular slot which has gear teeth along one side, thereby generating an angular rotation step of the tool holder during each reciprocating stroke. In some cases, the first frequency is at least one order of magnitude greater than the second frequency.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: May 8, 2012
    Assignee: Redent-Nova Ltd.
    Inventor: Raphael Hof
  • Publication number: 20120021377
    Abstract: An electric implant torque wrench includes a main unit, having a torque generating mechanism for outputting a torque and a control knob for adjusting and setting the torque, a handle having a flexible tube connected to the main unit for receiving the torque outputted by the main unit, and a clutch mechanism connected to the handle for receiving the torque outputted by the main unit for rotating a rotary tip to drive a dental implant into a patient's gum. The clutch mechanism stops the rotary tip from rotation when the torque outputted by the main unit reaches the value set by the control knob during installation of the dental implant.
    Type: Application
    Filed: July 26, 2010
    Publication date: January 26, 2012
    Inventor: Chun-Leon CHEN
  • Publication number: 20100330528
    Abstract: A dental tool displacement apparatus for use with a motorized power handle to displace a dental tool includes a tool holder having a receptacle for receiving the dental tool, and a drive arrangement. The drive arrangement defines a transmission from the motorized power handle to the tool holder such that the tool holder undergoes reciprocating motion parallel to the tool axis at a first frequency of oscillations per minute and rotates about the tool axis at a second frequency of rotations per minute. In some cases, the two types of motion are generated by an eccentric drive pin engaging an annular slot which has gear teeth along one side, thereby generating an angular rotation step of the tool holder during each reciprocating stroke. In some cases, the first frequency is at least one order of magnitude greater than the second frequency.
    Type: Application
    Filed: August 24, 2009
    Publication date: December 30, 2010
    Applicant: ReDent-Nova Ltd.
    Inventor: Raphael Hof
  • Patent number: 7632094
    Abstract: A method for producing glucose from a starch solution includes a step for saccharification of the starch solution (30) by adding enzymes and/or acid to crude syrup. The method then includes separation of a phase of proteins and/or fats from the crude syrup in a centrifugal separating device (110) and separation of the phase (50) of proteins and/or fats from the centrifugal separating device (110) separately from the residual crude syrup.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: December 15, 2009
    Assignee: Flottweg GmbH & Co., KGaA
    Inventor: Peter Bruckmayer
  • Patent number: 7448869
    Abstract: In medical or dental handpiece having a treatment tool driven by means of a drive part via a transmission arrangement, the transmission arrangement contains at least two planetary transmission stages connected one after another, which each have a sun gear mounted on a drive shaft, a planetary gear carrier having a plurality of uniformly distributed planetary gears cooperating with the sun gear, and a hollow gear, fixed to a housing, surrounding the planetary gears, having an inner toothing, wherein the planetary gear carrier of at least one transmission stage serves as drive shaft and carrier of the sun gear of the following transmission stage. In order to increase the stability of the arrangement the drive shaft for each transmission stage is extended beyond the sun gear driven thereby and in that the planetary gear carrier belonging to this sun gear is arranged rotatably on the extension.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: November 11, 2008
    Assignee: Kaltenbach & Voigt GmbH
    Inventor: Bernhard Kuhn
  • Publication number: 20080254408
    Abstract: Teeth cleaning apparatus comprises a cylindrical cleaning implement. The cleaning implement includes a resilient support shaft and an engagement thread and is drivingly rotatable. The implement is so configured that, when presented between a pair of adjacent teeth, a rotating implement threads itself into the interproximal space and extracts interproximal debris.
    Type: Application
    Filed: September 27, 2006
    Publication date: October 16, 2008
    Inventor: Eric Leonard Coates
  • Patent number: 7416410
    Abstract: The invention relates to a medical or dental medical handpiece (3) having an elongate shaft (13), which has in its front end region a tool holder (5) having a lateral insertion opening (5a) for a tool (6), and having a rearward and a forward shaft section (13a, 13b) which include an obtuse angle (W2) which is open to the side away from the insertion opening (5a), wherein in the shaft sections (13a, 13b) there is rotatably mounted in each case a drive shaft section (53a, 53c), which stand in driving connection with one another by means of gears meshing with one another, and wherein the forward shaft section (13b) stands in driving connection with the tool holder (5) by means of gears (58, 59) meshing with one another.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: August 26, 2008
    Assignee: Kaltenbach & Voigt GmbH & Co. KG
    Inventor: Bernhard Kuhn
  • Publication number: 20040166473
    Abstract: A dental handpiece including a housing of a size and configuration to be conveniently graspable by a user; a dental tool clamping device carried by the housing; a dental tool to be clamped in the clamping device; a rotary drive for rotating the clamping device, and the dental tool when clamped therein; and a transmission system coupling the rotary drive to the dental tool to rotate same. The dental tool includes a driving tip for engaging the head of a fastening member to be fixed by rotation within the patient's mouth. The transmission system includes a torque limiter for limiting the torque applied by the rotary drive to the driving tip. In some described embodiments, the torque limiter is included within the dental housing, and in other described embodiments it is included within the dental tool.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 26, 2004
    Inventor: Yechiel Cohen
  • Patent number: 6629842
    Abstract: A dental handpiece to securely detect the load applied to the handpiece itself, and when an excessive load is applied to the handpiece, the cutting operation is suspended. The dental handpiece includes: a head; a support mounted in the head to support a cutting tool; and a transmission mounted in the head to transmit driving force to the support. The support and the transmission are slidably connected with each other. In the dental handpiece, the support may be cylindrical and can be provided with a plurality of inclined projections that are arranged in a longitudinal direction of an outer periphery of the cylinder; the transmission may be provided with engaging projections with inclined faces parallel to inclined faces of the plurality of inclined projections; and the transmission can be provided with resiliency that allows the engaging projections movable in a direction departing from the inclined projections.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: October 7, 2003
    Assignee: Mani, Inc.
    Inventors: Nozomu Satake, Toshiyuki Takase
  • Publication number: 20020072033
    Abstract: A dental instrument with a drive tool and a transmission device. The instrument has a neck drive with a drive shaft housed within a first and second shank. The drive shaft has a toothed wheel at one end and the transmission device at the other end. The transmission device has at least one magnetic and/or magnetizable clutch element and means for influencing the transmission torque of the magnetic and/or magnetizable clutch elements.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 13, 2002
    Inventors: Thomas Bierbaum, Ulf Stein
  • Publication number: 20020025504
    Abstract: A dental handpiece to securely detect the load applied to the handpiece itself, and when excessive load is applied to the handpiece cutting operation is suspended. The dental handpiece according to the present invention comprises: a head; a support mounted in the head to support a cutting tool; and a transmission mounted in the head to transmit driving force to the support; wherein the support and the transmission are slidably connected with each other. In the above dental handpiece, the support may be cylindrical and can be provided with a plurality of inclined projections that are arranged in a longitudinal direction of an outer periphery of the cylinder; the transmission may be provided with engaging projections with inclined faces parallel to inclined faces of the plurality of inclined projections; and the transmission can be provided with a resiliency that allows the engaging projections resiliently movable in a direction apart from the inclined projections.
    Type: Application
    Filed: August 6, 2001
    Publication date: February 28, 2002
    Inventors: Nozomu Satake, Toshiyuki Takase
  • Publication number: 20020009690
    Abstract: The invention relates to a handpiece (3) for medical purposes, having a tool holder (5) arranged in the forward end region of the handpiece (3), a retaining coupling (16) for releasably fixing a tool (6) in the tool holder (5), and a drive connection (8), for a rotary and/or stroke drive of the tool holder (5), extending longitudinally through the handpiece (3), there being provided an arrangement for limiting the maximum torque value which can be transmitted to the tool holder (5) to a lesser torque value. For the purpose of broadening the range of application of the handpiece (3), the arrangement can be selectively deactivated and again activated, by means of a setting device (14).
    Type: Application
    Filed: June 5, 2001
    Publication date: January 24, 2002
    Inventors: Bernhard Kuhn, Bernd Gugel
  • Patent number: 5975900
    Abstract: A handheld medical instrument for rotating a tool including a support structure having a portion that may be gripped by a user, and an electric motor having an output rotatable at a first speed. A tool rotating shaft extends from the support structure and is adapted to be coupled to a tool to rotate the tool at a second speed. A variable speed transmission is operatively coupled between the output of the electric motor and the tool rotating shaft to transfer rotation therebetween and is selectively adjustable between at least two different ratios of the first speed relative to the second speed.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: November 2, 1999
    Assignee: Ormco Corporation
    Inventor: Gary T. Garman
  • Patent number: 5569034
    Abstract: A dental handpiece having a slow speed, high torque rotary output, comprises a housing member; an input shaft rotatably mounted in the housing member; a coupling member at an end portion of the input shaft for being coupled to a rotary dental drive unit; a plurality of planetary gear stages sequentially arranged within the housing member, a first of the planetary gear stages being coupled so as to be rotationally driven by the input shaft; subsequent planetary gear stages being sequentially coupled to each other such that an output of one planetary gear stage drives an input of a next subsequent planetary gear stage; and an output shaft coupled to a final output planetary gear stage of the plurality of sequentially arranged planetary gear stages. The output shaft provides a slow speed, high torque rotary output responsive to the input shaft being driven by a higher speed rotary dental drive unit.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: October 29, 1996
    Assignee: MTI Precision Products, Inc.
    Inventors: Moshe Meller, Michael Feldman
  • Patent number: 5529494
    Abstract: A dental tool driving device comprising a facility within a housing for driving a driven mechanism. A component within the housing is for selectively placing the driven mechanism in a rotating mode and in an oscillating mode. An element is for coupling a rotatable tool implement to the housing in a removable manner. When the selectively placing component is put in the rotating mode, the driving facility will operate the driven mechanism and cause the rotatable tool implement to turn about an axis. Another element is for coupling the oscillating tool implement to the housing in a removable manner. When the selectively placing component is put in the oscillating mode, the driving facility will operate the driven mechanism and cause the oscillating tool implement to swing back and forth.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: June 25, 1996
    Inventor: Tanya Vlacancich
  • Patent number: 5281138
    Abstract: A dental handpiece includes a drive shaft which is driven by a drive motor and which has two coaxial ring gears which can selectively be coupled to shafts passing through different tool carriers. Different angular speeds of the coaxial ring gears is achieved by the inner ring gear being directly connected to the drive shaft, whereas the outer ring gear is driven by the drive shaft by way of a planetary transmission.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: January 25, 1994
    Assignee: Imtec Innovative Medizintechnik Gesellschaft m.b.H.
    Inventor: Otto Rosenstatter
  • Patent number: 4834652
    Abstract: The handpiece comprises a speed reducer (34) formed by an interchangeable modular unit. This reducer (34) is mounted in a housing (15) equipped with bearings (16, 17) supporting the input shaft (1), and the output shaft (10) respectively. The housing is closed on the input side by a side plate (18) formed from a piece which has a fixed wheel (7), is concentric with respect to the input shaft and is equipped with radial toothing (6) facing the inside of the housing (15). The output shaft (10) comprises, at its rear end, an output wheel (9) having a radial toothing (8) facing the interior of the housing. A ball thrust bearing is provided between an internal shoulder (15a) of the housing and an external shoulder (9a) of the output shaft.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: May 30, 1989
    Assignee: Micro-Mega (Suisse) S.A.
    Inventor: Jean-Jacques W. Luiset
  • Patent number: 4693685
    Abstract: A transmission device for use in a dental handpiece has a modular unit comprising an input shaft coaxial to and driven by the motor shaft, and an oblique shaft extending obliquely with respect to the input shaft and also to the tool driving shaft. Each end of the oblique shaft carries a bevel pinion, one bevel pinion meshing with a bevel wheel fixed to the input shaft and the other bevel pinion meshes with another bevel wheel fixed to the tool driving shaft. The input and oblique shafts are mounted in suitable bores formed in a socket, the oblique bore remaining without the peripheral limits of the socket. The socket is adapted to be forcibly fitted into the handle of the handpiece.
    Type: Grant
    Filed: November 7, 1985
    Date of Patent: September 15, 1987
    Assignee: Micro-Mega S.A.
    Inventor: Jacques Pernot
  • Patent number: 4643675
    Abstract: A dental handpiece, encompassing a gripping sleeve and a head sleeve which is bent relative to the longitudinal axis of the gripping sleeve, as well as a drive shaft which is supported within the handpiece and which drives a treating implement arranged in a head at the free end of the head sleeve. The drive shaft is transversely divided in the region of the bending location, wherein the two drive shaft parts are in interengagement through the intermediary of a follower or engaging device, and wherein a planetary ball gear drive is interposed in the driven drive shaft part. While retaining the planetary ball gear drive which acts as safeguard against overloads, it is possible, without an exchange of the complete handpiece, to effect in a rapid and simple manner a transition to working with a certain head which is selected from a large number of heads.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: February 17, 1987
    Assignee: Kaltenbach & Voigt GmbH & Co.
    Inventor: Bernhard Kuhn
  • Patent number: 4490114
    Abstract: A device for rotating a member at relatively low rotational speeds is particularly useful for rotating a brush-type tooth polisher on an insert for an ultrasonic dental prophylaxis unit. The device comprises a vibrator which ultrasonically vibrates longitudinally and has a driving tip end portion which converts the longitudinal vibrations into elliptical motion. The elliptically moving driving tip tangentially engages at least one rotatable roller during an arc of the elliptical motion to rotate the roller. A speed reduction device couples the roller to a rotary polisher to rotate the polisher at a reduced speed. Preferably, the speed reduction device also isolates the axial and radial thrust applied, in use, to the polisher from the roller which receives some radial thrust from the vibrator. This reduces the bearing requirements for the polisher and roller. Also preferably, the roller, speed reduction and polisher elements are assembled as a unit separable from the vibrator for ready replacement.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: December 25, 1984
    Assignee: Cooper LaserSonics, Inc.
    Inventors: Claus Kleesattel, George E. Warrin
  • Patent number: 4475889
    Abstract: An angle-drive head of a dental handpiece with the housing thereof removable. A speed-increasing pinion is provided for meshing with a drive pinion of the angle-drive. A shaft connected to the pinion extends axially in the head and has a speed-increasing pinion for developing a greater speed. A speed-increasing device removably coupled to the head has a third speed-increasing pinion and a fourth pinion is coupled thereto. A tool-receiving jaw is provided in the device for coupling to the fourth speed-increasing pinion for being rotationally driven therefrom.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: October 9, 1984
    Inventors: Philippe Garcia, Roger Gaillard
  • Patent number: 4433957
    Abstract: The present transmission gear for a dental handpiece generally has a handle portion including a biased guide slot and a holding sleeve fixedly held in the handle portion, a first cylindrical hollow driven shaft, a second driven shaft having at its rear end portion an axial central cavity and fixedly inserted into the first driven shaft, a shiftable clutch shaft having a drive pin, a collar bearing including a slidable pin and a crossed male lug and journaled rotatably in the central hollow, a planetary gear train provided at the rear end portion of the clutch shaft, and a drive gear coupled to the motor to be engaged with the clutch shaft whereby the clutch shaft is either coupled to the drive shaft or disengaged therefrom by the alternative rotation of an operating ring to deliver either a direct transmission of the motor rotation or reduced speed rotation thereof to a dental tool.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: February 28, 1984
    Assignee: Nakanishi Dental Mfg. Co., Ltd.
    Inventor: Toshimasa Nakanishi
  • Patent number: 4306865
    Abstract: A modular reduction gear for a dental handpiece comprises an input shaft coupled to the driving motor and provided with a pinion constituting the sun wheel of an epicyclic gear of which the planet carrier is rigid with the adjacent end of the output shaft transmitting the rotary motion to the dental instrument, the carrier supporting three planet pins having mounted thereon for free rotary motion three planet pinions meshing with the sun pinion and with a fixed toothed annulus clamped between the pair of sockets constituting the body of the handpiece.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: December 22, 1981
    Assignee: Micro-Mega, S.A.
    Inventor: Henri Leonard
  • Patent number: 4278429
    Abstract: A dental handpiece, which has a drive motor part connected to a housing and a head part with a socket for supporting a tool for rotation being releasably secured on the housing, characterized by the handpiece being convertible between an angled handpiece and a straight handpiece. This is accomplished by the housing being composed of a first housing member, a second housing member, a device for interconnecting the first and second housing members for swivel movement between a first position with their drive shaft sections extending at an angle to each other and a second position with the drive shaft sections being in axial alignment, and a device for holding the housing members in a selected one of the first and second positions.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: July 14, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Reinhard Straihammer, Werner Schuss
  • Patent number: 4278428
    Abstract: A dental handpiece with at least two drive shaft sections for transmitting the rotary motion from a drive motor to an acceptance socket which is rotatably mounted in a head part of the handpiece, each of the drive shaft sections being arranged with their axes at an angle to one another and one of the two drive shaft sections having two coaxial gears which have different numbers of teeth and the other drive shaft section having at least one gear characterized by one of the two sections being mounted for axial displacement between two positions with one of the positions having one of the two gears in engagement with a gear and the other position having the other of the two gears in engagement with a gear. The gears on the drive shaft sections can be selected so that in one of the positions a direct drive can be obtained and in the other position either a step-up or step-down ratio can be obtained. In one embodiment, a single gear of the one section coacts with the two gears of the other section.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: July 14, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Reinhard Straihammer, Hans J. Klose, Werner Schuss
  • Patent number: 4276025
    Abstract: In a dental handpiece having a drive motor, a grip section coupled to the drive motor and terminating in a head part having a socket for supporting a tool for rotation, the grip section having a drive train for transmitting rotation motion of the drive motor to the socket with the drive train including at least two drive shaft sections interconnected by meshing gears and the grip section having an angle portion so that one drive shaft section adjacent the socket extends at an angle of inclination to the other drive shaft section on the axis of the drive motor characterized by an improvement of the angle of inclination being formed in at least two stages with an additional drive shaft section interposed between the one drive shaft section adjacent the socket and other drive shaft section on the axis of the drive motor.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: June 30, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventor: Reinhard Straihammer
  • Patent number: 4245985
    Abstract: A dental handpiece having a holding sleeve, a driven shaft rotatable in the holding sleeve to drive a dental instrument, a driving device releasably connected to the holding sleeve and having a drive shaft which is drivingly connected to the driven shaft via a drive-transmission unit which is removably mounted in the holding sleeve. The unit comprises a bearing sleeve which houses one or more shafts, and optionally a ball-type planetary transmission, and is mountable in and removable from the holding sleeve through an end of the holding sleeve remote from the instrument end of the handpiece. The bearing sleeve is secured in the holding sleeve against axial and rotational movement relative to the holding sleeve.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: January 20, 1981
    Assignee: Kaltenbach & Voigt GmbH & Co.
    Inventors: Eugen Eibofner, Ernst Strohmaier
  • Patent number: 4222738
    Abstract: A dental handpiece having a drive arrangement which provides for different speeds to be imparted to a dental tool. The drive arrangement comprises a planetary gear arrangement and a transmission member adapted for intercoupling to provide the different speeds at an output drive shaft for the dental tool. Interengagement means comprising axial slots are provided on the planetary gear arrangement, and a counter-engagement means including balls having segments which protrude from the transmission are provided to engage the interengagement axial slots to transmit the different speeds from a drive motor to the dental tool.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: September 16, 1980
    Assignee: Kaltenbach & Voigt GmbH & Co.
    Inventor: Ernst Strohmaier