US3708240A - Speed governor - Google Patents

Speed governor Download PDF

Info

Publication number
US3708240A
US3708240A US00167644A US3708240DA US3708240A US 3708240 A US3708240 A US 3708240A US 00167644 A US00167644 A US 00167644A US 3708240D A US3708240D A US 3708240DA US 3708240 A US3708240 A US 3708240A
Authority
US
United States
Prior art keywords
valve
chamber
fluid
rotor
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00167644A
Other languages
English (en)
Inventor
J Theis
L Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PATTY PROCESSING Inc AN IL CORP
Air Turbine Technology Inc
Original Assignee
Hollymatic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hollymatic Corp filed Critical Hollymatic Corp
Application granted granted Critical
Publication of US3708240A publication Critical patent/US3708240A/en
Anticipated expiration legal-status Critical
Assigned to AIR TURBINE TECHNOLOGY, INC., A FL CORP. reassignment AIR TURBINE TECHNOLOGY, INC., A FL CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PATTY PROCESSING, INC.
Assigned to PATTY PROCESSING, INC., AN IL CORP. reassignment PATTY PROCESSING, INC., AN IL CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HOLLYMATIC CORPORATION
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/0007—Control devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/14—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by liquid or gas pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/18—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces for rotating the spindle at a speed adaptable to wear of the grinding wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/06—Adaptations for driving, or combinations with, hand-held tools or the like control thereof
    • F01D15/062—Controlling means specially adapted therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/06—Adaptations for driving, or combinations with, hand-held tools or the like control thereof
    • F01D15/065—Adaptations for driving, or combinations with, hand-held tools or the like control thereof with pressure-velocity transformation exclusively in rotor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/904—Tool drive turbine, e.g. dental drill
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0971—Speed responsive valve control
    • Y10T137/108—Centrifugal mass type [exclusive of liquid]
    • Y10T137/1135—Rotating valve and rotating governor

Definitions

  • One of the features of this invention is to provide an improved fluid driven device in which the flow of pressurized fluid to a rotor is controlled by a valve that is responsive to increasing fluid pressure in a chamber on the side of the valve opposite the valve seat and with means for increasing fluid pressure in this chamber with increasing rotational speed so that pressure buildup in the chamber moves the valve toward closed position thereby restricting flow of pressurized fluid to the rotor and controlling the speed.
  • FIG. 1 is a shortened side elevational view of a pressurized fluid engine having a governor embodying the invention with a portion of the engine being in longitudinal section.
  • FIG. 2 is an enlarged sectional fragmentary view illustrating the governor in fully open position such as when pressurized fluid is first admitted to the engine.
  • FIG. 3 is a view similar to FIG. 2 but with the governor in an intermediate operating position between the completely closed position of FIG. 1 and the fully open position of FIG. 2.
  • FIG. 4 is an enlarged sectional exploded view of the speed responsive portion of the governor.
  • FIG. 5 is a sectional view taken substantially along line 5-5 of FIG. 4.
  • FIG. 6 is a transverse view taken substantially along line 6-6 of FIG. 2.
  • the pressurized fluid engine illustrated in the drawings is similar to the one described and claimed in the copending Theis et al application Ser. No. 170,234, filed Aug; 9, 1971 and assigned to the same assignee as the present application.
  • the engine 10 comprises a casing 11 in which is rotatably mounted a shaft 12 which in this embodiment has a small abrasive grinding wheel 13 on its forward end.
  • the rear of the casing 11 is provided with an axial tubular extension 14 integral with and extending rearwardly of a rear cover 15. Attached to this rearwardly extending tube 14 is the end 16 of a flexible compressed air hose.
  • the inner surface of the rear cover is flat as shown at 17 in the area surrounding a fluid inlet or compressed air passage 18 in the tube 14.
  • the rear end of the casing 11 is enlarged and of circular cross section to provide a chamber 19 containing a rotor 20 that is attached to the threaded rear end 21 of the drive shaft 12-.
  • the shaft 12 is held for rotation within the casing by a pair of ball bearing devices 22 positioned at opposite ends of the shaft 12 and of which only one is shown.
  • annular floating seal 27 Surrounding the fluid inlet passage 18 and around which the rotor 20 rotates is an annular floating seal 27 having a rear surface 28 bearing in sealing engagement with the surface 17 on the end cover 15 and a forward surface 29 subjected to air pressure in a pressurized fluid chamber 30.
  • a governor device having a valve seat ring 31 of metal press fitted into the cylindrical surface 32 that is concentric to the axis of rotation and that also contains at its forward end the floating seal 27.
  • This valve seat is generally cylindrical like the floating seal 27 and has a central passage 33 substantially coinciding with the central passage 34 in the seal 27.
  • the ring 31 therefore defines the inner side of the fluid pressure chamber 30. Extending diametrically across the ring 31 is a metal rod 35 which functions as a barrier for diverting small particles that might be carried by the fluid 37 from entering the small governor fluid opening 55. It also acts to retain the ring in position.
  • the opening 55 is small; thus in one embodiment it was only 0.015 inch in diameter.
  • valve 38 Cooperating with the valve seat surface 36 of the ring 31 to control pressurized fluid 37 flow through the concentric passage 18, seal passage 34 and ring passage 33 there is provided a longitudinally extending valve 38 of generally cylindrical shape thatis coaxial with the axis of rotation of the shaft 12.
  • the generally cylindrical valve 38 is movable in an axial chamber 39 in the shaft 12 and has a flat rear end 40 that engages the valve seat surface 36 to block completely flow of the pressurized fluid 37 when the valve is completely closed as shown in FIG. 1.
  • This surface 40 is circular and has a diameter somewhat greater than the diameter of the central passage 33 in the ring 31 with which it is concentric.
  • a circular step 41 which is engaged by a circular flange 42 when the valve 38 is in its forwardmost position to admit the maximum flow of pressurized fluid into the interior 24 of the rotor.
  • the valve 38 is movable in its cylindrical axial chamber 39 on two sets of spaced ball bearings 43 that roll on the inner surface of the chamber 39 during the movement of the valve 38 between its extreme positions of FIGS. 1 and 2.
  • the valve 38 is constructed of a central metal stem '47 having the enlarged rear end provided with the flange 42 and a portion forwardly thereof within a rigid plastic sleeve 48 in which are located the two sets of circularly arranged radial openings 49 in which are located the sets of balls 43. The forward end of. the
  • stem 47 is'provided with a metal insert 50 having a cir- 'cular flange 51 against which bears one end of a com- .pressed helical compression spring 52. This spring is precompressed so that when the fluid engine is under no fluid pressure the spring holds the valve 38 closed against ring 31 as illustrated in FIG. 1.
  • the axial chamber 39 in which the valve 38 is located provides at its forward end a chamber 53 in which the compressed spring 52 is positioned.
  • the stem 47 and the insert 50 are provided with a longitudinally ex- -tending axial fluid flow passage means 54 that extends the fluid pressure chamber 53.
  • valve operating chamber 53 is on the side or end of the valve 38 opposite the valve seat 36. Pressurized fluid in this chamber 53 acts in conjunction with the compression spring 52 to urge the valve 38 toward the closed position of FIG. 1 or to the right as viewed in enlarged detail in FIGS. 2 and 3.
  • vent means for venting this chamber as a result of centrifugal force.
  • This vent means comprises a forward end closure plug 56 that is press fitted into the forward end of the axial chamber 39.
  • This metal plug 56 has a vent passage therein that includes a side passage 57 down the side of the plug, a radially inwardly extending passage 58 into an inner chamber 59 and a forwardly extending passage 60 that leads into a forward chamber 61 which is connected by a radial passage 62 to an annular fluid passage 63 between the shaft 12 and the casing 11.
  • the forward end of the plug 56 is sealed to the surface of the forward end of the chamber 39 by means of a gasket 64 held in a circular groove 65.
  • the inner chamber 59 of the plug 56 is provided with a closure plug 66 that is spaced from the end I of the inner chamber 59 surrounding the radial passage 58 so as to provide communications between the passages 58 and 60.
  • This inner end of the closure plug 66 is provided with a recessed chamber 67 extending generally radially and communicating at its inner end with a passage 68 substantially parallel to the passage 60 and also in communication with the chamber 61.
  • a metal ball 69 Positioned in this radial chamber 67 is a metal ball 69 that is adapted to seat against the inner end 70 of the radial passage 58 when thrown outwardly by the centrifugal force of the rotating shaft 12.
  • the position of the ball 69 controls venting of fluid to a region of normal atmospheric pressure through the passages 57 58, 60 and 62 from the chamber 53.
  • the region to the rear of the ball or the top as illustrated in the drawings is vented also to thechamber 61 by way of the passage 68;
  • the ball 69 in conjunction with the structure associated therewith comprises centrifugally responsive'means for restricting flow of valve control fluid from the vent means 58-62 as a function of increasing rotational speed and thereby increasing the pressure of the valve control fluid in the chamber 53.
  • the axial chamber or bore 39 in the shaft 12 in which the axially movable valve 38 and associated structure are located is concentric with the axis of rotation and with the valve, valve seat 31, floating seal 27 and pressurized fluid supply passage 18.
  • centrifugal ball 69 was of one-sixteenth inch diameter and the ball weighed 3.67 X pounds. At 80,000 rpm the center of the ball was 0.0278 inch from the axis of rotation and at this speed the ball was spaced about 0.001 inch from its circular seat 70.
  • the incoming pressurized fluid 37 initially moves the valve 38 all the way to the left as viewed in FIG. 2 until the flange 42 bears against the shoulder 41 as shown in FIG. 2. Immediately most of the fluid is directed radially outwardly into the interior 24 of the rotor whereupon rotation commences. At the same time some of the fluid flows through the passages 55 and 54 into the chamber 53 to create a back or closing pressure on the forward or left end of the valve 48 which counteracts the fluid pressure on the rear or valve seal surface end 40 of the valve.
  • the forces on the valve are balanced so that the operation of the valve is smooth and responds immediately to differences in load and in speed.
  • the fluid pressure on the face 40 of the valve increases because less fluid can bypass the valve seat 40 into the interior 24 due to the lessening space.
  • This lessened fluid flow into the rotor interior 24 decreases the pressure in this space 24 and at the same time fluid pressure on the annular seal 44 also decreases.
  • the closing force of the precompressed spring 52 also decreases as the spring becomes elongated with the valve moving toward its closed position.
  • the governor operates by controlling the fluid supply from the passage 18 to operate the rotor 20.
  • the governor is thus applicable to any pressurized fluid operated device where fluid (either gas or liquid) is used to operate a power device.
  • the valve 38 acts as a throttle valve to restrict this fluid flow when necessary and a portion of the pressurized fluid supplied to the engine is diverted to function as a valve closing force in conjunction with a compressed spring and with this diverted fluid being either vented so as to reduce its effect or being confined as required with this venting being controlled by the centrifugal forces set up in a weighted member ball 69.
  • a speed governor device comprising: fluid responsive apparatus including a rotor; fluid inlet means to said rotor including a valve seat; a valve movable toward and away from said valve seat to regulate flow of fluid therethrough; chamber means at the side of the valve opposite said seat; means for supplying pressurized valve control fluid to said chamber for urging the valve toward said valve seat; vent means for venting said. chamber; and centrifugally responsive means for restricting flow of said valve control fluid from said vent means as a function of increasing rotational speed to increase the pressure of said valve control fluid in said chamber and thus on said valve as a function of said speed.
  • said means for supplying pressurized fluid to said chamber comprises a valve passage means in said valve extending from adjacent said valve seat to said chamber.
  • valve is movable in a bore and there is provided a fluid seal between said valve and bore
  • said rotor is. mounted .on. a shaft for axial rotation therewith and said valve, chamber means and centrifugally responsive means are positioned in said shaft.
  • a speed governor device comprising: fluid responsive apparatus including a rotor; a shaft on which said rotor is mounted for axial rotation therewith, said shaft having a bore; fluid inlet means to said rotor including a valve seat; a valve movable'in said bore toward and away from said valve seat to regulate flow of fluid therethrough; a fluid seal between said valve and bore; chamber means at the side of the valve opposite said seat; means for supplying pressurized valve control fluid to said chamber for urging the valve toward said valve seat comprising a fluid passage'means in said valve extending from adjacent said valve seat to said chamber; a fluid seal between said valve and bore; vent means for venting said chamber; and centrifugally responsive means for restricting flow of said valve control fluid from said vent means as a function ofincreasing rotational speed to increase the pressure of said valve control fluid in said chamber and thus on said valve as a function of said speed, said valve, chamber means and centrifugally responsive means being positioned in said shaft.
  • valve is linearly movable in said bore in a path toward and away from said valve seat, and said'shaft, valve, valve seat, bore, path and axis of rotation of said rotor and shaft are substantially coaxial.
  • a speed governor device comprising: fluid responsive apparatus including a rotor; a shaft in which said rotor is mounted for rotation therewith about an axis of rotation; fluid inlet means to said rotor substantially concentric to said axis and including a valve seat; a valve movably mounted within said shaft and substantially concentric with said axis for movement along the axis toward and away from said valve seat to regulate flow of fluid therethrough; chamber means at the side of the valve opposite said seat; means for supplying pressurized valve control fluid to said chamber for urging the valve toward said valve seat; vent means for venting said chamber; and centrifugally responsive means for restricting flow of said valve control fluid from said vent means as a function of increasing rotational speed to increase the pressure of said valve control fluid in said chamber and thus on said valve as a function of said speed, said vent means comprising a passage means from said chamber including a generally radially extending section that includes a valve seat and said centrifugally responsive means comprises a weighted member urged toward said valve seat on rotation
  • said weighted member comprises a radially movable ball movable toward said valve seat to restrict flow through said vent means.
  • spring means are provided urging said valve toward said valve seat and pressurized valve control fluid to said chamber for urgmg the valve toward said valve seat; vent means for venting said chamber; centrifugally responsive means for restricting flow of said valve control fluid from said vent means as a function of increasing rotational speed to'increase the pressure of said valve control fluid in said chamberand thus on said valve as a function of said speed, said valve, chamber means and centrifugally responsive means being positioned in said shaft; and spring means for urging said valve toward said valve seat and thereby providing a valve closing force in addition to that of said valve control fluid, said spring means being located in said chamber and bearing against the side of said valve opposite said valve seat.
  • a speed governor device comprising: fluid responsive apparatus including a rotor; a shaft on which said rotor is mounted for axial rotation therewith, said shaft having a bore, fluid inlet means to said rotor including a valve seat; a valve movable in said bore toward and away from said valve seat to regulate flow of fluid therethrough; chamber means at the side of the valve opposite said seat; means for supplying pressurized valve control fluid to said chamber for urging the valve toward said valve seat; vent means for venting said chamber; centrifugally responsive means for restricting flow of said valve control fluid from said vent means as a function of increasing rotational speed to increase the pressure of said valve control .fluid in said chamber and thus on said valve as a function of said speed, said valve, chamber means and centrifugally responsive means being positioned in said shaft; spring means for urging'said valve toward said valve seat and thereby providing a valve closing forcein addition to that of said valve control fluid, said spring means being located in said chamber and bearing against the side of said valve opposite said valve seat,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Automation & Control Theory (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Rotary Pumps (AREA)
  • Safety Valves (AREA)
  • Centrifugal Separators (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US00167644A 1971-07-30 1971-07-30 Speed governor Expired - Lifetime US3708240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16764471A 1971-07-30 1971-07-30

Publications (1)

Publication Number Publication Date
US3708240A true US3708240A (en) 1973-01-02

Family

ID=22608202

Family Applications (1)

Application Number Title Priority Date Filing Date
US00167644A Expired - Lifetime US3708240A (en) 1971-07-30 1971-07-30 Speed governor

Country Status (12)

Country Link
US (1) US3708240A (de)
AU (1) AU458507B2 (de)
BE (1) BE782626A (de)
BR (1) BR7205089D0 (de)
CH (1) CH532285A (de)
DE (1) DE2226722A1 (de)
ES (1) ES403360A1 (de)
FR (1) FR2149157A5 (de)
GB (1) GB1322889A (de)
IT (1) IT957923B (de)
NL (1) NL7204669A (de)
SE (1) SE374968B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4776752A (en) * 1987-03-02 1988-10-11 Davis Lynn M Speed governed rotary device
EP0575301A1 (de) * 1992-06-16 1993-12-22 Atlas Copco Tools Ab, Nacka Geschwindigkeitsregler für ein mit Pressluft angetriebenes Werkzeug
US5496173A (en) * 1993-06-21 1996-03-05 Siemens Aktiengesellschaft Dental handpiece having an automatically controlled turbine drive
US5782634A (en) * 1995-08-11 1998-07-21 Kaltenbach & Voigt Gmbh & Co. Medical, in particular dental turbine handpiece
EP0945591A2 (de) 1998-03-27 1999-09-29 Atlas Copco Tools Ab Drehzahlregelung für eine rotierende Luftdruckmaschine
US6146137A (en) * 1998-11-19 2000-11-14 Vogel; William Charles Contamination prevention device for ultra high speed dental type handpieces
EP1907169A2 (de) * 2005-07-12 2008-04-09 Air Turbine Technology, Inc. Rotationswerkzeug
US20090180859A1 (en) * 2006-04-05 2009-07-16 Jan Sitzler Compressed air-motor for rotationally driven tools
CN102171414A (zh) * 2008-10-03 2011-08-31 阿特拉斯·科普柯工具公司 气动动力工具中的设备以及动力工具
JP2014511778A (ja) * 2011-04-20 2014-05-19 アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ 空気圧式動力工具の速度を調速する速度制御装置
US20150158165A1 (en) * 2013-12-06 2015-06-11 Ingersoll-Rand Company Impact Tools With Speed Controllers
US20230056338A1 (en) * 2021-08-20 2023-02-23 Mitsubishi Heavy Industries Compressor Corporation Processing apparatus and processing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090821A (en) * 1976-06-29 1978-05-23 Ingersoll-Rand Company Governor device
JPS5745357A (en) * 1980-09-02 1982-03-15 Champion Spark Plug Co Rotary atomizing painting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925089A (en) * 1956-01-31 1960-02-16 Buckeye Tools Corp Pneumatic tool
US3069137A (en) * 1958-12-04 1962-12-18 Turbomachines Ltd Pressure-fluid motors
US3242936A (en) * 1961-09-07 1966-03-29 Kalb Hans Hydraulic speed regulator for engines and motors
US3552410A (en) * 1968-12-13 1971-01-05 Chicago Pneumatic Tool Co Centrifugal governor having a spring-adjusting ring and valve-cleaning means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925089A (en) * 1956-01-31 1960-02-16 Buckeye Tools Corp Pneumatic tool
US3069137A (en) * 1958-12-04 1962-12-18 Turbomachines Ltd Pressure-fluid motors
US3242936A (en) * 1961-09-07 1966-03-29 Kalb Hans Hydraulic speed regulator for engines and motors
US3552410A (en) * 1968-12-13 1971-01-05 Chicago Pneumatic Tool Co Centrifugal governor having a spring-adjusting ring and valve-cleaning means

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4776752A (en) * 1987-03-02 1988-10-11 Davis Lynn M Speed governed rotary device
EP0575301A1 (de) * 1992-06-16 1993-12-22 Atlas Copco Tools Ab, Nacka Geschwindigkeitsregler für ein mit Pressluft angetriebenes Werkzeug
US5314299A (en) * 1992-06-16 1994-05-24 Atlas Copco Tools Ab Speed governor for a pneumatic power tool
US5496173A (en) * 1993-06-21 1996-03-05 Siemens Aktiengesellschaft Dental handpiece having an automatically controlled turbine drive
US5782634A (en) * 1995-08-11 1998-07-21 Kaltenbach & Voigt Gmbh & Co. Medical, in particular dental turbine handpiece
EP0945591A2 (de) 1998-03-27 1999-09-29 Atlas Copco Tools Ab Drehzahlregelung für eine rotierende Luftdruckmaschine
US6179552B1 (en) 1998-03-27 2001-01-30 Atlas Copco Tools Ab Speed control unit for a pneumatic rotation motor
US6146137A (en) * 1998-11-19 2000-11-14 Vogel; William Charles Contamination prevention device for ultra high speed dental type handpieces
EP1907169A4 (de) * 2005-07-12 2009-07-22 Air Turbine Tech Inc Rotationswerkzeug
EP1907169A2 (de) * 2005-07-12 2008-04-09 Air Turbine Technology, Inc. Rotationswerkzeug
JP2009501295A (ja) * 2005-07-12 2009-01-15 エア タービン テクノロジー，インコーポレイテッド 回転具
US20090180859A1 (en) * 2006-04-05 2009-07-16 Jan Sitzler Compressed air-motor for rotationally driven tools
US8292569B2 (en) * 2006-04-05 2012-10-23 Schmid & Wezel Gmbh & Co. Compressed air-motor for rotationally driven tools
CN102171414A (zh) * 2008-10-03 2011-08-31 阿特拉斯·科普柯工具公司 气动动力工具中的设备以及动力工具
CN102171414B (zh) * 2008-10-03 2014-04-16 阿特拉斯·科普柯工业技术公司 气动动力工具中的设备以及动力工具
JP2014511778A (ja) * 2011-04-20 2014-05-19 アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ 空気圧式動力工具の速度を調速する速度制御装置
US20150158165A1 (en) * 2013-12-06 2015-06-11 Ingersoll-Rand Company Impact Tools With Speed Controllers
US9592591B2 (en) * 2013-12-06 2017-03-14 Ingersoll-Rand Company Impact tools with speed controllers
US20230056338A1 (en) * 2021-08-20 2023-02-23 Mitsubishi Heavy Industries Compressor Corporation Processing apparatus and processing method
US11926010B2 (en) * 2021-08-20 2024-03-12 Mitsubishi Heavy Industries Compressor Corporation Processing apparatus and processing method

Also Published As

Publication number Publication date
GB1322889A (en) 1973-07-11
NL7204669A (de) 1973-02-01
ES403360A1 (es) 1975-04-16
DE2226722A1 (de) 1973-02-08
SE374968B (de) 1975-03-24
FR2149157A5 (de) 1973-03-23
BE782626A (fr) 1972-08-16
AU4079672A (en) 1973-10-11
IT957923B (it) 1973-10-20
CH532285A (de) 1972-12-31
AU458507B2 (en) 1975-02-05
BR7205089D0 (pt) 1973-06-14

Similar Documents

Publication Publication Date Title
US3708240A (en) Speed governor
US2957424A (en) Centrifugal pump
US2502546A (en) Hydraulic apparatus
US3434493A (en) Flow-sensitive shutoff valve
US3023783A (en) Ball valve
US3624753A (en) Two-stage opening valve
US3767320A (en) Variable speed governor
DE60110832T2 (de) Verstellbare flügelzellenpumpe
US3734258A (en) Coupling with quick release valve
US4657481A (en) Insertably adjustable and angularly adjustable inlet guide vane apparatus for a compressor
EP0288594A1 (de) Durchflussregler
US2905026A (en) Variable ratio transmission
US4694791A (en) Starting device with air motor for internal combustion engines
US2864400A (en) High pressure cut off valve for gas cylinders
US2847186A (en) Fluid driven power unit
US3976389A (en) Pressurized gas engine
US3382809A (en) Control for fluid pump bypass
US2160025A (en) Hydraulic control mechanism
US5314299A (en) Speed governor for a pneumatic power tool
US3478611A (en) Variable speed drive assembly
US4432389A (en) Reseat relief valve
US4346765A (en) Speed responsive motor shutoff mechanism for fluid operated tool
US2359017A (en) Relief valve
US4265267A (en) Flow control device for use with positive displacement pump
US4213744A (en) Hydraulic pump and improved by-pass flow means therefor

Legal Events

Date Code Title Description
AS Assignment

Owner name: PATTY PROCESSING, INC., AN IL CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOLLYMATIC CORPORATION;REEL/FRAME:005258/0121

Effective date: 19821015

Owner name: AIR TURBINE TECHNOLOGY, INC., A FL CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PATTY PROCESSING, INC.;REEL/FRAME:005320/0693

Effective date: 19821015