Tool Drive Turbine (e.g., Dental Drill, Etc.) Patents (Class 415/904)
-
Patent number: 8840361Abstract: 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: GrantFiled: September 2, 2011Date of Patent: September 23, 2014Assignee: Rolls-Royce PLCInventor: Kristofer J. Bottome
-
Patent number: 8721333Abstract: 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: GrantFiled: October 20, 2010Date of Patent: May 13, 2014Assignee: J. Morita Manufacturing CorporationInventors: Tetsuya Takashi, Shozo Nakayama
-
Patent number: 8529317Abstract: 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: GrantFiled: October 2, 2009Date of Patent: September 10, 2013Assignee: Atlas Copco Industrial Technique AktiebolagInventor: Anders Urban Nelson
-
Patent number: 8500389Abstract: 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: GrantFiled: December 18, 2008Date of Patent: August 6, 2013Assignee: Atlas Copco Industrial Technique AktiebolagInventors: Anders Urban Nelson, Sten Herman Olsson
-
Patent number: 8382426Abstract: 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: GrantFiled: April 4, 2008Date of Patent: February 26, 2013Assignees: Koushi Itoh, Shinohara Industry Inc., Tomoaki MurataInventors: Koushi Itoh, Hirokatsu Shinohara, Tomoaki Murata
-
Patent number: 8382423Abstract: 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: GrantFiled: July 7, 2008Date of Patent: February 26, 2013Assignee: Microfabrica Inc.Inventors: Uri Frodis, Adam L. Cohen, Michael S. Lockard
-
Patent number: 8292569Abstract: 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: GrantFiled: January 17, 2007Date of Patent: October 23, 2012Assignee: Schmid & Wezel GmbH & Co.Inventor: Jan Sitzler
-
Patent number: 8226363Abstract: 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: GrantFiled: March 23, 2010Date of Patent: July 24, 2012Assignee: Kaltenbach & Voigt GmbHInventors: Alexander Flock, Helmut Gruber, Thomas Roesch
-
Patent number: 8210847Abstract: 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: GrantFiled: August 28, 2008Date of Patent: July 3, 2012Assignee: Axenic Dental, Inc.Inventors: Eli Thomssen, Dirk Schipper, Kevin Turner
-
Patent number: 8092147Abstract: 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: GrantFiled: September 9, 2008Date of Patent: January 10, 2012Assignee: Weatherford Energy Services GmbHInventors: Uwe Draeger, Helmut Winnacker
-
Patent number: 8037567Abstract: 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: GrantFiled: March 27, 2009Date of Patent: October 18, 2011Inventor: Lee Harris
-
Patent number: 8016550Abstract: 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: GrantFiled: September 1, 2007Date of Patent: September 13, 2011Assignee: Gison Machinery Co., Ltd.Inventor: Freddy Lin
-
Patent number: 7967552Abstract: 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: GrantFiled: September 2, 2005Date of Patent: June 28, 2011Inventors: Neil Edward Brett, Graham Cox, Chris Robinson
-
Patent number: 7955050Abstract: 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: GrantFiled: July 22, 2009Date of Patent: June 7, 2011Inventor: Theodore S. Wadensten
-
Patent number: 7927101Abstract: 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: GrantFiled: March 22, 2006Date of Patent: April 19, 2011Assignee: J. Morita Manufacturing CorporationInventors: Tetsuya Takashi, Shozo Nakayama
-
Patent number: 7811056Abstract: 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: GrantFiled: April 6, 2006Date of Patent: October 12, 2010Assignee: Kaltenbach & Voigt GmbHInventors: Alexander Flock, Helmut Gruber, Thomas Roesch
-
Patent number: 7677863Abstract: 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: GrantFiled: April 29, 2005Date of Patent: March 16, 2010Assignee: Atlas Copco Tools ABInventor: Anders Urban Jansson
-
Patent number: 7568867Abstract: 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: GrantFiled: October 18, 2007Date of Patent: August 4, 2009Inventor: Steve M. Bryan
-
Patent number: 7566199Abstract: 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: GrantFiled: July 14, 2006Date of Patent: July 28, 2009Assignee: Gison Machinery Co., Ltd.Inventor: Freddy Lin
-
Patent number: 7396197Abstract: 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: GrantFiled: September 30, 2004Date of Patent: July 8, 2008Assignee: ATI Industrial Automation, Inc.Inventor: Douglas K. Lawson
-
Patent number: 7357619Abstract: 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: GrantFiled: April 22, 2005Date of Patent: April 15, 2008Assignee: The Anspach Effort, Inc.Inventor: Eddy H. Del Rio
-
Patent number: 7329123Abstract: 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: GrantFiled: May 9, 2003Date of Patent: February 12, 2008Assignee: J. Morita Manufacturing CorporationInventors: Noriyuki Tanaka, Shozo Nakayama, Hirofumi Jikuhara, Naruo Wada
-
Patent number: 7238000Abstract: 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: GrantFiled: October 10, 2003Date of Patent: July 3, 2007Assignee: Atlas Copco Tools ABInventor: Karl Johan Lars Elsmark
-
Patent number: 7223069Abstract: 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: GrantFiled: July 12, 2005Date of Patent: May 29, 2007Assignee: Air Turbine Technology, Inc.Inventor: Kemma S. Dodds
-
Patent number: 7192248Abstract: 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: GrantFiled: May 11, 2004Date of Patent: March 20, 2007Assignee: The Boeing CompanyInventors: Amy M. Helvey, Keith A. Young, Hana Tlusty, legal representative, Kevin Waymack, Jiri Tlusty, deceased
-
Patent number: 7140880Abstract: 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: GrantFiled: April 28, 2003Date of Patent: November 28, 2006Assignee: Kaltenbach & Voigt GmbH & Co.Inventor: Bernhard Kuhn
-
Patent number: 7048540Abstract: 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: GrantFiled: May 9, 2003Date of Patent: May 23, 2006Assignee: J. Morita Manufacturing CorporationInventors: Hirofumi Jikuhara, Shozo Nakayama, Noriyuki Tanaka
-
Patent number: 6958058Abstract: 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: GrantFiled: June 5, 2003Date of Patent: October 25, 2005Assignee: Medsafe Inc.Inventors: Donald W. Hunter, Sr., Joseph J. Cerola, Allan Coplin, Reginald Fowler
-
Patent number: 6899514Abstract: 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: GrantFiled: October 28, 2003Date of Patent: May 31, 2005Assignee: Atlas Copco Tools ABInventors: Karl-Johan Lars Elsmark, Gunnar Christer Hansson, Anders Urban Jansson
-
Patent number: 6702038Abstract: 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: GrantFiled: October 17, 2000Date of Patent: March 9, 2004Inventors: Miroslav Sedlacek, Stanislav Hostin
-
Patent number: 6695573Abstract: 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: GrantFiled: April 5, 2002Date of Patent: February 24, 2004Assignee: Cooper Technologies CompanyInventor: Philip Arnold Snider
-
Patent number: 6676374Abstract: 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: GrantFiled: December 1, 2000Date of Patent: January 13, 2004Assignee: J. Morita Manufacturing CorporationInventors: Nobuo Hashimoto, Yoshihiko Kinoshita, Minoru Hayashida
-
Publication number: 20040005528Abstract: 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: ApplicationFiled: May 9, 2003Publication date: January 8, 2004Applicant: J. Morita Manufacturing CorporationInventors: Hirofumi Jikuhara, Shozo Nakayama, Noriyuki Tanaka
-
Patent number: 6644420Abstract: 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: GrantFiled: March 1, 2002Date of Patent: November 11, 2003Assignee: Schmid & Wezel GmbH & Co.Inventor: Norbert Lay
-
Publication number: 20030190228Abstract: 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: ApplicationFiled: April 5, 2002Publication date: October 9, 2003Inventor: Philip Arnold Snider
-
Publication number: 20020123021Abstract: 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: ApplicationFiled: March 25, 2002Publication date: September 5, 2002Applicant: DENTSPLY Research & Development Corp.Inventors: Tom Papanek, Lu He, Amit J. Patel
-
Publication number: 20020072036Abstract: 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: ApplicationFiled: September 13, 2001Publication date: June 13, 2002Inventors: Eugene J. Novak, Tom Papanek, Mikhail Ayzenshetyn
-
Patent number: 6352546Abstract: 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: GrantFiled: November 20, 2000Date of Patent: March 5, 2002Inventor: Carson F. Hill
-
Patent number: 6336790Abstract: 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: GrantFiled: October 17, 1997Date of Patent: January 8, 2002Assignee: Atlas Copco Tools A.B.Inventor: Rolf Alexis Jacobsson
-
Publication number: 20010002975Abstract: 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: ApplicationFiled: December 1, 2000Publication date: June 7, 2001Inventors: Nobuo Hashimoto, Yoshihiko Kinoshita, Minoru Hayashida
-
Patent number: 6241464Abstract: 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: GrantFiled: October 18, 1999Date of Patent: June 5, 2001Assignee: Dynabrade, Inc.Inventors: David E. Huffaker, Frank D. Lehman
-
Patent number: 6179552Abstract: 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: GrantFiled: March 25, 1999Date of Patent: January 30, 2001Assignee: Atlas Copco Tools ABInventor: Rolf Alexis Jacobsson
-
Patent number: 6152736Abstract: 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: GrantFiled: August 9, 1999Date of Patent: November 28, 2000Inventors: Frank Schmidinger, Herbert L. Biebl
-
Patent number: 6146137Abstract: 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: GrantFiled: November 19, 1998Date of Patent: November 14, 2000Inventor: William Charles Vogel
-
Patent number: 6033408Abstract: 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: GrantFiled: July 6, 1998Date of Patent: March 7, 2000Assignee: Midas Rex, L.P.Inventors: Gary B. Gage, Ray Umber, Glenn T. Carlson, Townesend R. Scantlebury
-
Patent number: 5984654Abstract: 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: GrantFiled: November 26, 1997Date of Patent: November 16, 1999Assignee: Denticator International, Inc.Inventors: Jose L. Mendoza, Philip Theodore Lingman
-
Patent number: 5902108Abstract: 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: GrantFiled: February 24, 1998Date of Patent: May 11, 1999Assignee: J. Morita Manufacturing CorporationInventors: Shozo Nakayama, Haruo Ogawa, Makoto Numakawa, Hirofumi Jikuhara, Hajime Yokota
-
Patent number: 5876182Abstract: 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: GrantFiled: August 11, 1997Date of Patent: March 2, 1999Assignee: BMW Rolls-Royce GmbHInventor: Volker Schulte
-
Patent number: 5836766Abstract: 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: GrantFiled: July 24, 1997Date of Patent: November 17, 1998Assignee: Kaltenbach & Voigt GmbH & Co.Inventors: Bernd Gugel, Bernhard Kuhn
-
Patent number: 5807108Abstract: 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: GrantFiled: September 24, 1997Date of Patent: September 15, 1998Assignee: Dentalwerk Burmoos Gesellschaft m.b.H.Inventors: Martin Schwenoha, Josef Strohmeier, Wilhelm Brugger