Tool Drive Turbine (e.g., Dental Drill, Etc.) Patents (Class 415/904)
  • Patent number: 8840361
    Abstract: A fan blade (10) for a turbofan aero engine comprises a blade body including a root (10c) for engagement with a rotor, and a tip, wherein the tip is provided with a winglet (14).
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: September 23, 2014
    Assignee: Rolls-Royce PLC
    Inventor: Kristofer J. Bottome
  • Patent number: 8721333
    Abstract: An air-driven rotary cutting tool including a grip part, a head part provided at a distal end of the grip portion, and a rotor of double-wheel type rotatably installed in a hollow portion formed in the head part. The rotor has a first turbine blade portion provided with a plurality of first turbine vanes surrounding the rotary axis and a second turbine blade portion integrally formed with the first turbine blade and having a plurality of second turbine vanes surrounding the rotary axis. The first turbine vane has, on its side when seen in a direction into the rotary axis, a concave shape concaved in a direction of rotation of the rotor, and the second turbine vane has, on its side, a concave shape concaving in a direction opposite from the first turbine vane.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: May 13, 2014
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Tetsuya Takashi, Shozo Nakayama
  • Patent number: 8529317
    Abstract: A speed control device is provided for a pneumatic power tool which includes a housing with a pressure air inlet, an output spindle, and an air turbine with a turbine wheel drivingly connected to the output spindle. Nozzles are arranged for directing motive air onto the turbine wheel. The speed control device includes a valve unit for controlling pressure air flow through the nozzles in response to a speed responsive parameter. The plurality of nozzles are divided into n separate nozzle groups having individual air feed through individual air feed passages (n is an integer, n>1). The valve unit is capable of being actuated into n states for controlling air feed to the n nozzle groups, whereby for each subsequent state, x (1?x?n, x is an integer) air feed passages are connected to the pressure air inlet such that nozzle groups 1 to x are fed with air.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 10, 2013
    Assignee: Atlas Copco Industrial Technique Aktiebolag
    Inventor: Anders Urban Nelson
  • Patent number: 8500389
    Abstract: A gas driven motor includes a housing, a gas driven rotating member including a rotor and a rotor shaft carrying the rotor and journalled in a first bearing and a second bearing supported in the housing, and a speed governor for controlling a pressure gas inlet flow in response to the rotation speed of the rotating member. The first bearing includes a set of rolling elements, an outer race arranged in the housing and an inner race arranged on a shaft portion of the rotating member, the set of rolling elements being in contact with the races on which the rolling elements roll. The motor further includes a coupling device arranged to couple the speed governor to the rolling elements of the first bearing, thereby transferring the rotary motion from the rolling elements to the speed governor.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 6, 2013
    Assignee: Atlas Copco Industrial Technique Aktiebolag
    Inventors: Anders Urban Nelson, Sten Herman Olsson
  • Patent number: 8382426
    Abstract: A high-speed air spindle including a spindle 1 supported by a first bearing 3 at the leading end side in the axial direction and a second bearing 2 at the rear end side, a driving air turbine 4 fixed in a spindle portion between the first bearing 3 and the second bearing 2, a speed-increasing air turbine 5 fixed in a spindle portion ahead of the first bearing 3, and an air passage 9 of an exhaust of compressed air supplied in the driving air turbine 4, flowing in the sequence of the first bearing 3 and the speed-increasing air turbine 5.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: February 26, 2013
    Assignees: Koushi Itoh, Shinohara Industry Inc., Tomoaki Murata
    Inventors: Koushi Itoh, Hirokatsu Shinohara, Tomoaki Murata
  • Patent number: 8382423
    Abstract: Embodiments are directed to micro-scale or meso-scale devices having hydraulic or pneumatic actuation mechanisms incorporating bearings elements (such as ball bearings, cylindrical bearings, interference bearings, or hydrostatic bearings. Devices of some embodiments are turbines. Some devices may function as medical devices. Other embodiments are directed to multi-layer, multi-material electrochemical fabrication methods for producing such devices.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: February 26, 2013
    Assignee: Microfabrica Inc.
    Inventors: Uri Frodis, Adam L. Cohen, Michael S. Lockard
  • Patent number: 8292569
    Abstract: An air regulator comprises a housing, a shaft, a first air regulation member and an elastic ring. The shaft is rotationally fixed within the housing. The first air regulation member is coaxially coupled to the shaft and has a plurality of first air flow apertures positioned radially about the shaft. The elastic ring is configured and positioned to centrifugally deform and increasingly block the first air flow apertures.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: October 23, 2012
    Assignee: Schmid & Wezel GmbH & Co.
    Inventor: Jan Sitzler
  • Patent number: 8226363
    Abstract: A turbine wheel for a gas operated medical handpiece includes a plurality of blades which extend in radial direction from a hub and extend in axial direction from a side ring web of the turbine wheel, and the front side of which is substantially concavely curved about an approximately radially running first axis of curvature. In order to increase the drive power or to better exploit the drive power at least one blade has at least in an axial end region an inclination surface which is inclined in the axial direction towards the front side.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 24, 2012
    Assignee: Kaltenbach & Voigt GmbH
    Inventors: Alexander Flock, Helmut Gruber, Thomas Roesch
  • Patent number: 8210847
    Abstract: A sterile, substantially maintenance free disposable dental handpiece is constructed from two shells and a center core, the center core having a flow deflector on one end. The shells are joined around the core with mating protrusions and/or tapered walls to form the body and head of the handpiece. A base is integrally-formed with the center core. The base has conduits that allow entry of light and pressurized air and/or water into the body. The head at the opposite end of the body from the base rotatably mounts an impeller assembly having an impeller shaft. The impeller shaft includes blades driven by the pressurized air. The blades can have cavities to reduce weight.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: July 3, 2012
    Assignee: Axenic Dental, Inc.
    Inventors: Eli Thomssen, Dirk Schipper, Kevin Turner
  • Patent number: 8092147
    Abstract: The invention is directed to a turbine (3) for generating power in a drill string (2), including a turbine rotor (10) drivable by a fluid and a bypass device having a first bypass channel bypassing the turbine rotor (10). For varying the volumetric flow through the bypass channel, provision is made for a valve (28) and a control device driven by the fluid and having a drive element (24) by means of which the valve (28) is movable anywhere between a first and a second position. The drive element (24) produces a flow resistance in the fluid flow path downstream from the turbine rotor (10) and downstream from the valve (28) and in the flow direction takes support upon a spring (26).
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: January 10, 2012
    Assignee: Weatherford Energy Services GmbH
    Inventors: Uwe Draeger, Helmut Winnacker
  • Patent number: 8037567
    Abstract: A rotary elliptically shaped head, free spinning, designed to be attached to a pressurized hose, fluid driven. When activated, the fluid is directed thru the head, striking internal longitudinal fins the cause the had to spin longitudinally, at high speed. The fluid is released thru holes in the head, which by the same centrifugal force driving the head along rows of bristles. When applied to a desire surface the head will scrub and clean the surface.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: October 18, 2011
    Inventor: Lee Harris
  • Patent number: 8016550
    Abstract: A direction-switchable pneumatic cylinder includes: a cylinder body with two intakes, several exhaustion ports and a rotary shaft; and a predetermined number of movable wheels and fixed wheels arranged in the cylinder body and interlaced with each other. Each of the movable wheels and fixed wheels is formed with several vents concentrically arranged into an inner circle and an outer circle. The rotary shaft is fitted through the movable wheels and fixed wheels. The fixed wheels are not rotatable, while the movable wheels are synchronously rotatably with the rotary shaft. The outer circles of vents of the fixed wheels and the movable wheels are aligned with one intake, while the inner circles of vents of the fixed wheels and the movable wheels are aligned with the other intake. When high-pressure gas is guided into the pneumatic cylinder from one intake, the airflow will flow through the outer circles of vents to drive the movable wheels and the rotary shaft in one direction.
    Type: Grant
    Filed: September 1, 2007
    Date of Patent: September 13, 2011
    Assignee: Gison Machinery Co., Ltd.
    Inventor: Freddy Lin
  • Patent number: 7967552
    Abstract: A rotary atomiser drive spindle for use as part of a rotary atomiser, the drive spindle comprising a shaft which carries a turbine and a body which comprises at least one supply channel for supplying gas to the turbine for rotatingly driving the shaft relative to the body. The turbine comprises a rotor body portion, which is ring shaped, and a plurality of blades projecting from one of the generally flat surfaces of the rotor body portion. Generally radial gas paths through the turbine are defined by adjacent pairs of blades. The at least one supply channel comprises a nozzle portion from which, in use, gas leaves the body of the spindle towards the turbine. Each nozzle comprises an outlet and the cross sectional area of the gas passage through the nozzle portion decreases monotonically from the inlet of the nozzle to the outlet. Two turbines may be provided and exhaust air may be used for cooling.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: June 28, 2011
    Inventors: Neil Edward Brett, Graham Cox, Chris Robinson
  • Patent number: 7955050
    Abstract: An apparatus and method for a turbine wheel assembly for a pneumatic rotary vibrator that provides a selectable force output while being removably retained on a vibrator shaft member. The turbine wheel assembly is mounted inside of a generally circular interior chamber of a pneumatic vibrator housing. The turbine wheel assembly includes: (1) a turbine ring that has an outside diameter, an inside diameter and a face width, (2) a sleeve member that is round and tubular, (3) an intermediate weight ring assembly that has an outer circumference, an inner circumference, and a predetermined face width, The weight ring assembly is formed by a plurality of wedge shaped segments.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: June 7, 2011
    Inventor: Theodore S. Wadensten
  • Patent number: 7927101
    Abstract: A handpiece and a method for driving the handpiece are provided in which a sucking-back problem can be prevented with a simple structure. The handpiece 10 has a gripping portion 11 to be gripped by an operator, a head 15 mounted at a distal end of the gripping portion; and a wheel 55 rotatably mounted in an interior of the head. The head has an inlet 25 from which air is supplied to the wheel and an outlet 28 from which the air is discharged, the inlet and outlet being defined in the head, at least one buffer chamber 47 defined in the head, where the air is forced in due to a centrifugal force applied thereto by rotations thereof with the wheel and then accumulated under positive pressure, passages 66, 67, 68, and 34 for guiding the accumulated air from a neighborhood of the rotating wheel to an atmosphere, and a circumferential wall 44 mounted between the outlet and the wheel for providing a resistance to the air moving from the wheel toward the outlet.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: April 19, 2011
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Tetsuya Takashi, Shozo Nakayama
  • Patent number: 7811056
    Abstract: A turbine wheel for a gas operated medical handpiece includes a plurality of blades which extend in radial direction from a hub and extend in axial direction from a side ring web of the turbine wheel, and the front side of which is substantially concavely curved about an approximately radially running first axis of curvature. In order to increase the drive power or to better exploit the drive power at least one blade has at least in an axial end region an inclination surface which is inclined in the axial direction towards the front side.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: October 12, 2010
    Assignee: Kaltenbach & Voigt GmbH
    Inventors: Alexander Flock, Helmut Gruber, Thomas Roesch
  • Patent number: 7677863
    Abstract: An over-speed safety device for a pneumatic rotation motor having a cylinder (10), a forward end wall (11), a rear end wall (12) with a pressure air inlet opening (21), a rotor (13), and an actuator (15) co-rotative with the rotor (13) and responsive to centrifugal action, and a valve lid (20) tiltable relative to a pivot axis (C) and shiftable between an open position and a closed position for controlling the airflow though the inlet opening (21), wherein the pivot axis (C) extends along a chord in relation to the rotor centre, and the actuator (18) comprises a cam surface (25) for camming engagement with the valve lid (20) for moving the latter in a radial direction toward the closed position. The valve lid (20) is supported by ridge positions (33, 34) on a seat surface (2) disposed around the inlet opening (21), and a wire spring (26) is arranged to retain and bias the valve lid (20) against the seat surface (32).
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: March 16, 2010
    Assignee: Atlas Copco Tools AB
    Inventor: Anders Urban Jansson
  • Patent number: 7568867
    Abstract: An air driven tool for use in a machining center, the air driven tool including an adjustable speed regulator and a turbine. The turbine is driven by pressurized air directed thereto. The turbine is rotatable about an axis. A flow of the air is regulated by the adjustable speed regulator. The adjustable speed regulator includes a biasing member, an inclined annular surface, a regulator plate and a plurality of moveable bearings. The inclined annular surface has an angle relative to the axis. The plurality of movable bearings are positioned between the inclined annular surface and the regulator plate. The biasing member biases the inclined annular surface and/or the regulator plate toward each other.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: August 4, 2009
    Inventor: Steve M. Bryan
  • Patent number: 7566199
    Abstract: A turbo pneumatic cylinder of a pneumatic tool, including a front turbine, a one-way rotatable inverse turbine and a rear turbine. The front and rear turbines are mounted on the rotary shaft of the pneumatic cylinder. The inverse turbine is one-way rotatably fitted on the rotary shaft between the front and rear turbines. Multiple blades are arranged on the circumferences of the front and rear turbine and the inverse turbines. The blades of the inverse turbine are directed in a direction reverse to the direction of the blades of the front and rear turbines. The front and rear turbines and the rotary shaft rotate in the same direction, while the inverse turbine rotates in a direction reverse to the direction of the front and rear turbines. As a result, the efficiency of the pneumatic cylinder is enhanced and the twisting of the pneumatic cylinder is avoided when it is in operation.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: July 28, 2009
    Assignee: Gison Machinery Co., Ltd.
    Inventor: Freddy Lin
  • Patent number: 7396197
    Abstract: The non-axial force exerted on a pneumatic tool by a non-axial air supply is balanced to allow for uniformly radially distributed compliance forces on the tool. An annular air ring is disposed around the pneumatic tool, covering an air inlet port. Air is supplied by any route to a first air passage that supplies the air to the interior of the annular air ring, exerting a force on the annular air ring. Air flows in the annular space of the air ring, entering the tool air inlet port to drive the pneumatic tool. One or more second air passages are connected to the annular air ring in an even radial distribution. Each second air passage is connected to the air source, or terminates in an air blockage, creating a column of pressurized air that exerts a force on the annular air ring equal to the first air passage. The forces exerted on the air ring are thus balanced with respect to the axis of the tool.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: July 8, 2008
    Assignee: ATI Industrial Automation, Inc.
    Inventor: Douglas K. Lawson
  • Patent number: 7357619
    Abstract: A cris-cross pattern of flow channels serves to divide the flow of fluid and then cross the flow to cause an impact between the flow in each channel to impact against each other to reduce the decibels and noise level created by the flowing of the fluid. In a pneumatic surgical drill the spent air used to power the vane motor is diverted so that the flow of is divided in separate flow paths that cross to allow the air that flows from one of the divided channels impinges on the air flowing from the other of the divided channels. In one embodiment the divided channels or flow passageways is formed in the end cap of the housing of a pneumatic surgical drill and in another embodiment the flow diverter with the divided passageways or channels is formed in a plug the fits into the coaxial hose that connects to the housing of the pneumatic surgical drill.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: April 15, 2008
    Assignee: The Anspach Effort, Inc.
    Inventor: Eddy H. Del Rio
  • Patent number: 7329123
    Abstract: A dental cutting device has a head portion (10) which accommodates a rotary cylinder (20) for holding a cutting tool (22), and a turbine blade (21) mounted around and secured on the rotary cylinder (20). Air fed from an air-supply port (24) is blown onto the turbine blade to rotate the same, and the air blown onto the turbine blade is exhausted from the exhaust port (25). The head portion has a first chamber (26) which is located at a portion confronting the outer peripheral end portion of the turbine blade and which extends in a direction orthogonal to the central axis of the rotary cylinder, and second chambers (27, 28) which are located adjacent to one or both ends of the turbine blade along the direction of the central axial and which communicate with the first chamber.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: February 12, 2008
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Noriyuki Tanaka, Shozo Nakayama, Hirofumi Jikuhara, Naruo Wada
  • Patent number: 7238000
    Abstract: A pneumatic high speed motor includes a stator housing, a rotor journalled in the stator housing, and a pressure air inlet passage. A speed governor for the motor includes a valve element that is shiftable between an open position and a closed position for controlling pressure air flow through the pressure air inlet passage, and a spring which continuously biases the valve element toward open position. An air compressor is driven by the rotor to deliver an output pressure, which is responsive to a speed of the rotor, to an activating surface of the valve element. The activating surface of the valve element is acted upon by the output pressure of the air compressor to shift the valve element toward the closed position against the bias force of the spring at rotor speed levels exceeding a desired operating speed level.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: July 3, 2007
    Assignee: Atlas Copco Tools AB
    Inventor: Karl Johan Lars Elsmark
  • Patent number: 7223069
    Abstract: A rotary device having an inlet adapter for connecting the device to a pressurized fluid source, a turbine rotor, and an input passage. The input passage provides fluid communication between the input adapter and the turbine rotor, has a first end proximate the inlet adapter and an opening downstream from the first end, and has a generally constant cross sectional area between the first end and the opening.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: May 29, 2007
    Assignee: Air Turbine Technology, Inc.
    Inventor: Kemma S. Dodds
  • Patent number: 7192248
    Abstract: An air turbine driven rotary machine tool having a tool casing, a turbine rotor mounted within the casing for rotation, a stator mounted in fixed position in the tool casing coaxially aligned with the turbine rotor, a annular cavity defined within the casing and coaxially aligned with the stator and rotor for supplying air to the stator blades, a cylindrical spindle coaxially mounted with the turbine rotor in the tool casing for rotation with the turbine rotor, and a tool holder mounted coaxially to the spindle for rotation therewith and having an end thereof for operably receiving a cutting tool.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: March 20, 2007
    Assignee: The Boeing Company
    Inventors: Amy M. Helvey, Keith A. Young, Hana Tlusty, legal representative, Kevin Waymack, Jiri Tlusty, deceased
  • Patent number: 7140880
    Abstract: The invention relates to a medical or dental-medical handpiece having a rotary part which is rotatably mounted in a bearing bush by means of a roller bearing having an inner ring and an outer ring. In order to improve the handpiece with regard to an axial limiting of the roller bearing there is arranged in the inner surface of the bearing bush or in the outer surface of the outer ring a first ring groove in which there sits a securing ring which projects out of the first ring groove and bears at least with its one side on a shoulder surface of the respective radially oppositely lying part.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: November 28, 2006
    Assignee: Kaltenbach & Voigt GmbH & Co.
    Inventor: Bernhard Kuhn
  • Patent number: 7048540
    Abstract: A air-driven cutting device for medical treatment (a handpiece (10)) comprises a housing (18) for a head portion (14). The housing (18) accommodates a rotary cylinder (60) for holding a cylindrical cutting tool (46) inserted through the tool inlet (42) of the housing, and a turbine blade (62) mounted around and secured on the rotary cylinder. With this arrangement, a compressed air is blown onto the turbine blade to rotate the turbine blade, the rotor and the cutting tool. Particularly, a part or a whole of the end portion of the rotary cylinder in the vicinity of the tool inlet is covered with the cover section (42) of the housing. Therefore, the rotary cylinder does not contact the teeth or the tissues of the buccal cavity.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: May 23, 2006
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Hirofumi Jikuhara, Shozo Nakayama, Noriyuki Tanaka
  • Patent number: 6958058
    Abstract: Devices and methods of use of such devices for pumping fluid and for use in surgical procedures preferably include vacuum-driven pumps for providing irrigation and suction functions to the surgical field. Such pumps may be freestanding, external to or integrated into handpieces of the surgical instruments.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: October 25, 2005
    Assignee: Medsafe Inc.
    Inventors: Donald W. Hunter, Sr., Joseph J. Cerola, Allan Coplin, Reginald Fowler
  • Patent number: 6899514
    Abstract: An overspeed safety device for a pneumatic rotation motor having a stator (10) with an air inlet passage (16), a rotor (12), and a speed governor for determining a maximum speed level, and comprising a speed responsive actuator (34) connected to the rotor (12) and a valve (33) shiftable by the actuator (34) from a normally open position to a closed position so as to block or substantially restrict the air flow through the inlet passage (16) at the attainment of motor speed levels exceeding a predetermined maximum level should the speed governor malfunction, wherein the actuator (34) comprises a spring biassed contact element (48) connected to the rotor (12) and responsive to centrifugal action, and the valve (33) comprises a disc-shaped valve element (36) pivotally supported in the inlet passage (16) and maintained in its open position by one magnet (42) and in its closed position by another magnet (43).
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: May 31, 2005
    Assignee: Atlas Copco Tools AB
    Inventors: Karl-Johan Lars Elsmark, Gunnar Christer Hansson, Anders Urban Jansson
  • Patent number: 6702038
    Abstract: A hydraulic motor, especially for driving of rotating tools, consisting of a chamber (2) provided with an inlet (10) for supplying fluid, and with at least one outlet hole (6), before which, on a holding device, a rolling rotor (7) is seated, the rolling rotor (7) is formed by a body of rotational shape. That the chamber (2) is at least in its internal surface of rotational shape and of a tapering diameter. The chamber (2) is on its side of the maximum diameter open, and on the side of its minimum diameter limited by means of a wall (3), in the middle of which a hole (4) is provided, through which a shaft (5) passes with a clearance, the shaft (5) carrying the rolling rotor (7). The shaft (5) is inside the chamber (2) provided with a recess (8), the diameter of which is larger than the diameter of the hole (4) in the wall (3).
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: March 9, 2004
    Inventors: Miroslav Sedlacek, Stanislav Hostin
  • Patent number: 6695573
    Abstract: A turbine tool design with a number of innovative aspects which may be incorporated into the tool individually or as a group. One aspect relates to improved speed control, based on an elastically deformable governor member disposed within the rotating impeller assembly and having a substantially uniform cross-section. Another aspect relates to a overspeed safety configuration that employs secondary, or “retro”, nozzles that are enabled when the elastically deformable governor member is removed from the impeller assembly. Another aspect relates to routing the motive fluid exhaust through the operator-adjustable throttle assembly. Still another aspect relates to an approach to axially preloading the bearings supporting the rotating shaft of the impeller assembly.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: February 24, 2004
    Assignee: Cooper Technologies Company
    Inventor: Philip Arnold Snider
  • Patent number: 6676374
    Abstract: An air-driven rotating and cutting device or handpiece has a double-wheel rotor. The handpiece includes connecting channels for guiding air from first turbine blades to second turbine blades. Each of the channels is defined by an opening opened toward a direction parallel to the rotational axis and a surface portion formed by extending the opening to a direction along the rotational axis.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: January 13, 2004
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Nobuo Hashimoto, Yoshihiko Kinoshita, Minoru Hayashida
  • Publication number: 20040005528
    Abstract: A air-driven cutting device for medical treatment (a handpiece (10)) comprises a housing (18) for a head portion (14). The housing (18) accommodates a rotary cylinder (60) for holding a cylindrical cutting tool (46) inserted through the tool inlet (42) of the housing, and a turbine blade (62) mounted around and secured on the rotary cylinder. With this arrangement, a compressed air is blown onto the turbine blade to rotate the turbine blade, the rotor and the cutting tool. Particularly, a part or a whole of the end portion of the rotary cylinder in the vicinity of the tool inlet is covered with the cover section (42) of the housing. Therefore, the rotary cylinder does not contact the teeth or the tissues of the buccal cavity.
    Type: Application
    Filed: May 9, 2003
    Publication date: January 8, 2004
    Applicant: J. Morita Manufacturing Corporation
    Inventors: Hirofumi Jikuhara, Shozo Nakayama, Noriyuki Tanaka
  • Patent number: 6644420
    Abstract: A turning device for compressed air tools. which is operated by a compressed fluid, is provided with a housing and with a rotor, which is rotatably arranged in a front housing part and into whose turbine element the fluid, which is under pressure, can flow, has a braking arrangement and a switch for the compressed fluid. The switch which is operatively connected with the braking arrangement and is arranged on a rear housing part in line with a compressed fluid supply conduit. Such a turning device requires fewer components and can be stopped in a simpler and faster way by a fluid switch, in the form of a sliding switch, which encloses the rear housing part in the area of the supply conduit and is provided with axially oriented control pins, which are connected, fixed against relative displacement, with a brake disk of the braking arrangement.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: November 11, 2003
    Assignee: Schmid & Wezel GmbH & Co.
    Inventor: Norbert Lay
  • Publication number: 20030190228
    Abstract: A turbine tool design with a number of innovative aspects which may be incorporated into the tool individually or as a group. One aspect relates to improved speed control, based on an elastically deformable governor member disposed within the rotating impeller assembly and having a substantially uniform cross-section. Another aspect relates to a overspeed safety configuration that employs secondary, or “retro”, nozzles that are enabled when the elastically deformable governor member is removed from the impeller assembly. Another aspect relates to routing the motive fluid exhaust through the operator-adjustable throttle assembly. Still another aspect relates to an approach to axially preloading the bearings supporting the rotating shaft of the impeller assembly.
    Type: Application
    Filed: April 5, 2002
    Publication date: October 9, 2003
    Inventor: Philip Arnold Snider
  • Publication number: 20020123021
    Abstract: A dental handpiece (10) of the type having at least one component (11) fabricated from an elastomeric material, is improved by fabricating the component (11) from a perfluoroelastomer.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 5, 2002
    Applicant: DENTSPLY Research & Development Corp.
    Inventors: Tom Papanek, Lu He, Amit J. Patel
  • Publication number: 20020072036
    Abstract: A dental handpiece (10) has a rotor (15) and a ball bearing assembly (14) supporting the rotor (15). The ball bearing assembly (14) has at least one ball (22). The bearing (14) has an inner (20) and an outer race (21), and the outer race (21) has a thickened diameter.
    Type: Application
    Filed: September 13, 2001
    Publication date: June 13, 2002
    Inventors: Eugene J. Novak, Tom Papanek, Mikhail Ayzenshetyn
  • Patent number: 6352546
    Abstract: A tattoo needle pneumatic operating mechanism which utilizes a housing which has an internal cavity. A fan gear is rotatably mounted within the cavity. A cam is attached to the fan gear. Mounted on the cam is a cam lobe. The cam lobe is to engage with a cam surface which is mounted in conjunction with a slide. A tattoo needle is mounted to the slide. Revolving of the fan gear by air pressure causes the slide to reciprocate which causes the needle to reciprocate.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: March 5, 2002
    Inventor: Carson F. Hill
  • Patent number: 6336790
    Abstract: An axial flow power tool turbine motor for operation with an elastic fluid, like pressured air, includes a housing (12), a rotor (11) rotatively journalled in the housing (12) and formed in one piece with drive blades (24) arranged in axially spaced circumferential rows (C, A, C, E, G, I, K), and a stator (10) in the form of a tubular body (22) which is immovably supported in the housing (12) and which carries internal guide vanes (23) arranged in circumferential rows (B, D, F, H, J), wherein the tubular stator body (22) is divided into three longitudinal sections (22a, 22b, 22c) with which the guide vanes (23) are integrally formed, and a retainer (27, 29) for fixing and mounting the longitudinal sections (22a, 22b, 22c) in accurately defined relative positions to form the tubular stator body (22).
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: January 8, 2002
    Assignee: Atlas Copco Tools A.B.
    Inventor: Rolf Alexis Jacobsson
  • Publication number: 20010002975
    Abstract: An air-driven rotating and cutting device or handpiece has a double-wheel rotor. The handpiece includes connecting channels for guiding air from first turbine blades to second turbine blades. Each of the channels is defined by an opening opened toward a direction parallel to the rotational axis and a surface portion formed by extending the opening to a direction along the rotational axis.
    Type: Application
    Filed: December 1, 2000
    Publication date: June 7, 2001
    Inventors: Nobuo Hashimoto, Yoshihiko Kinoshita, Minoru Hayashida
  • Patent number: 6241464
    Abstract: A governor mechanism is mounted for rotation with a drive shaft about an axis, has one or more reaction nozzles for imparting rotational movement to the drive shaft, and one or more valve portions supported for radially directed sliding movement between first and second radially spaced positions for purposes of controlling flow of pressurized fluid to the nozzles and thus the rotational speed of the drive shaft. The valve portions are formed integrally with a ring-shaped mounting portion fabricated from resiliently deformable material. In alternative constructions, similar governor mechanisms are co-axially mounted with vane motors by a common drive shaft and the mechanisms employed to control flow of pressurized fluid to the vane motor.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: June 5, 2001
    Assignee: Dynabrade, Inc.
    Inventors: David E. Huffaker, Frank D. Lehman
  • Patent number: 6179552
    Abstract: A speed control unit for a pneumatic rotation motor having a stator (10) with an air inlet passage (14), a rotor (11) journalled in the stator (10). The speed control unit includes a speed governor (26) operated by two or more fly-weight members (28), and an overspeed safety device (27). The rotor (11) is formed with a coaxial blind bore (22) in which is secured a mounting structure (23) for supporting the fly-weight members (28), the valve element (29) and the bias spring (35) of the speed governor (26) inside the rotor (11). The overspeed safety device (27) includes a flow restricting element (39) displaceably guided in the air inlet passage (14) and locked in an inactive rest position by a trip element (43), and a speed responsive actuator (45) that is co-rotative with the rotor (11).
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: January 30, 2001
    Assignee: Atlas Copco Tools AB
    Inventor: Rolf Alexis Jacobsson
  • Patent number: 6152736
    Abstract: A dental turbine comprises a rotor (10) which is rotatably accommodated in a housing (12), the housing (12) having an outlet opening (23) for propellant air which causes the rotor (10) to rotate. The rotor (10) comprises a flow duct whose outlet opening (36) imposes a tangential component on the outflowing propellant air.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: November 28, 2000
    Inventors: Frank Schmidinger, Herbert L. Biebl
  • Patent number: 6146137
    Abstract: A gas turbine operated handpiece instrument having a spin able front shaft mounted bur that is operated by pressurized gas or air. Two embodiments are disclosed. In one a flexible rubber like PVC one-way pinch valve is mounted on an exterior gas exhaust stack of the instrument's body housing. This embodiment allows for the internal lubrication of the turbine parts by compressing the valve sides towards each other and then spraying a lubricate into the housing through the opened valve. In another embodiment, a metallic one-way ball valve is mounted within an extension to the housing and this design is more suitable for dental bur offset instruments. In both designs, the turbine has impellers located within the hollow body of the instrument. The purpose of the one-way valves in both embodiments is to prevent contaminates from being sucked back into the housing as the gas turbine is being shut down during its complete operating range.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: November 14, 2000
    Inventor: William Charles Vogel
  • Patent number: 6033408
    Abstract: A pneumatic surgical tool for cutting bone during surgical procedures includes a pneumatic motor having a rotary shaft, a resecting tool having a cutting element rotated by the motor, a chuck sleeve to surround and support the resecting tool, and anti-friction bearings for further rotatably supporting the resecting tool. The rotor and chuck sleeve are formed of an electrically nonconductive material. The resecting tool is formed of titanium. The bearings are formed of a ceramic, composite or plastic material.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: March 7, 2000
    Assignee: Midas Rex, L.P.
    Inventors: Gary B. Gage, Ray Umber, Glenn T. Carlson, Townesend R. Scantlebury
  • Patent number: 5984654
    Abstract: A fluid reaction device (10) is provided having a rotor (90) with vanes (92) pivotably connected thereto. The device (10) includes an entrance (30) for elevated pressure fluid and an outlet (40) for discharge of the fluid after contacting the rotor (90). The elevated pressure fluid passes from the entrance (30) into a high pressure area. The high pressure area is in contact with inlet ports (74) accessing a cylinder (70) within the device (10). The cylinder (70) supports the rotor (90) with a rotational axis (M) of the rotor (90) off center with respect to a central axis (N) of the cylinder (72). The elevated pressure fluid causes the rotor (90) and an attached output shaft (97) to rotate. The rotor (90) includes a trunk (24) with a plurality of posts (93) extending therefrom and with vanes (92) connected to the posts (93) through hinges (94). The vanes (92) can pivot from a first position collapsed against the trunk (24) to a second position spaced away from the trunk (24).
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: November 16, 1999
    Assignee: Denticator International, Inc.
    Inventors: Jose L. Mendoza, Philip Theodore Lingman
  • Patent number: 5902108
    Abstract: An air turbine handpiece comprises a grip portion and a head portion disposed at a tip of the grip portion. In the handpiece, a rotor is disposed in a chamber in the head portion, and a cutting tool is detachably attached to a rotation shaft which is rotated integrally with the rotor. A nozzle opening for injecting air toward a turbine blade portion and an exhaust opening for exhausting the injected air to the outside are opened to the chamber of the head portion. An arc width of the nozzle opening in a circumferential direction is two or more times a height in a direction of a rotation axis of the rotor. The nozzle opening is formed so as to extend in a width direction.
    Type: Grant
    Filed: February 24, 1998
    Date of Patent: May 11, 1999
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Shozo Nakayama, Haruo Ogawa, Makoto Numakawa, Hirofumi Jikuhara, Hajime Yokota
  • Patent number: 5876182
    Abstract: The boundary layer stimulation by blowing flow fluid into the proximity of the separation region on turbine blades is disclosed. In order to prevent a laminar boundary layer separation, the blowing-in takes place in the form of intermittent fluid pulses. A particularly advantageous arrangement for an axial turbomachinery rotor disk is provided for this purpose, on the end face of which a stationary ring is provided which has at least one passage opening with which inlet openings for the blade fluid ducts which are provided in the disk which passes by and by way of which the blowing into the proximity of the separation region takes place, become periodically congruent.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: March 2, 1999
    Assignee: BMW Rolls-Royce GmbH
    Inventor: Volker Schulte
  • Patent number: 5836766
    Abstract: A handpiece having a releasable retaining device for a tool having a shaft about which the tool rotates. The handpiece has a housing and a drive sleeve rotatably mounted in the housing. The drive sleeve has a hollow cylindrical insertion hole into which the shaft of the tool is placed. A drive means is provided for rotation of the drive sleeve. First and/or second releasable couplings are provided for rotatably and/or axially connecting the shaft to the drive sleeve. The releasable couplings have either a coupling slider or pressure member which is displaceable between coupling and decoupling positions. An actuating device is provided for displacing the coupling slider or pressure member into their decoupling position. In one embodiment the coupling slider is made of a ceramic material and fabricated into its final form by means of a single fabrication process without after treatment.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: November 17, 1998
    Assignee: Kaltenbach & Voigt GmbH & Co.
    Inventors: Bernd Gugel, Bernhard Kuhn
  • Patent number: 5807108
    Abstract: A dental handpiece includes a turbine arranged in a handpiece head for rotating a tool, wherein the turbine is supported by slide bearings or roller bearings arranged on the side of the rotor or turbine facing the tool and on the side of the rotor or turbine facing away from the tool. The handpiece head includes an air duct for the propulsion air and a return duct for the returned or used air. At least one opening in the turbine chamber wall in the area near the axis is connected through a connecting duct to the return duct.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: September 15, 1998
    Assignee: Dentalwerk Burmoos Gesellschaft m.b.H.
    Inventors: Martin Schwenoha, Josef Strohmeier, Wilhelm Brugger