US3672185A - Impulse motor - Google Patents

Impulse motor Download PDF

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Publication number
US3672185A
US3672185A US13283A US3672185DA US3672185A US 3672185 A US3672185 A US 3672185A US 13283 A US13283 A US 13283A US 3672185D A US3672185D A US 3672185DA US 3672185 A US3672185 A US 3672185A
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United States
Prior art keywords
cylinder
sealing
cavity
anvil
rotor
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Expired - Lifetime
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US13283A
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English (en)
Inventor
Knut Christian Schoeps
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Atlas Copco AB
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Atlas Copco AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D31/00—Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution
    • F16D31/06—Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution using pumps of types differing from those before-mentioned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/186—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with rotary unbalanced masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket

Definitions

  • ABSTRACT A impulse motor comprises a rotatable-cylinder with a cavity containing a liquid, a rotatable anvil and a sealing member being movably mounted in the cavity for cyclically passing a sealing position therein during relative rotations between the cylinder and anvil, in which sealing position the sealing member separates a chamber in the cavity disposed between the cylinder and anvil and of decreasingliquid volume during continued rotation of the cylinder.
  • the impulse motor has a relief valve in the cylinder and means for controlling the relief valve in dependence upon the rotation of said cylinder for keeping during subsequent passages of said sealing member past said sealing position firstly at least once in sequence the said chamber open in said cavity for permitting acceleration of the cylinder during more than one revolution thereof and thereupon closed for producing a pressure impulse in said chamber active to rotate the anvil.
  • This invention relates to impulse motors and more particularly to impulse motors incorporating a rotatable cylinder with a cavity containing a liquid, a rotatable anvil and a sealing member being movably mounted in the cavity for cyclically passing a sealing position therein during relative rotations between the cylinder and anvil, in which sealing position the sealing member separates a chamber in the cavity disposed between the cylinder and anvil and of decreasing liquid volume during continued rotation of the cylinder.
  • a pressure impulse is generated in the liquid trapped in the chamber.
  • the pressure impulse is usually used for transmitting torque impulses from the cylinder to the anvil, for example for tightening or loosening of fastening means such as nuts and screws.
  • the pressure impulses may be led from the chamber hydraulically on to an impact or vibration motor which may be used for a multitude of technical purposes.
  • Another object of the invention is to secure safe function of the impact motor in a simple and reliable way by the use of a cyclically controlled relief valve.
  • an impulse motor comprising a rotatable cylinder, a cavity in said cylinder containing a liquid, a rotatable anvil in said cavity, a sealing member movably mounted in said cavity for cyclically passing a sealing position therein during relative rotations between said cylinder and anvil in which sealing position said sealing member separates a chamber in said cavity disposed between said cylinder and anvil and of decreasing liquid volume during continued rotation of said cylinder, a relief valve in said cavity, and means controlling said relief valve in dependence upon the rotation of said cylinder for keeping during subsequent passages of said sealing member past said sealing position firstly at least once in sequence said chamber open in said cavity and thereupon closed for producing a pressure impulse in said chamber active to rotate said anvil.
  • FIG. 1 shows a longitudinal section of an impulse motor made according to the invention.
  • FIG. 2 is a fragmentary section on the line 2-2 in FIG. 1.
  • FIG. 3 is a fragmentary longitudinal section on the line 3-3 through the anvil of the impulse motor in FIG. 1.
  • FIG. 4a -4d are sections on the line 4-4 in FIG. 1 in four different positions of the main parts of the impulse motor illustrating a working cycle during which a pressure impulse is delivered every second revolution.
  • FIG. 5 is a longitudinal section through an impulse motor according to a modified embodiment of the invention.
  • FIG. 6 is a fragmentary section on the line 6-6 in FIG. 5.
  • FIG. 7 is a fragmentary section on the line 7-7 in FIG. 5.
  • FIG. 80-84! are sections on the line 8-8 in FIG. 5 in four different positions of the main parts of the impulse motor illustrating a working cycle with delivery of pressure impulses every second revolution.
  • FIG. 9 is a longitudinal section through an impulse motor according to another embodiment of the invention.
  • FIG. 10 is a section on the line 10-10 in FIG. 9.
  • FIG. Ila-11c are sections on the line 11-11 in FIG. 9 in three different positions of the main parts of the impulse motor illustrating a working cycle with pressure impulse delivery every third revolution.
  • FIG. 12 is a longitudinal section through a further modification of the invention.
  • FIG. 13a-13b show fragmentary sections on the line 13- 13 in FIG. 12 in two different positions of the main parts of the impulse motor illustrating a working cycle with pressure impulse delivery every second revolution or alternatively every fourth revolution.
  • the impulse motor 15 comprises a cylinder 15 which together with front and rear cover pieces 16, 17 is tightened within a sleeve shaped housing 19 against a front abutment 20 by means of a screw ring 18.
  • An anvil 21 is rotatably joumalled coaxially in the cylinder 15.
  • the opposite ends of the anvil 21 are sealingly and rotatably guided in recesses 22, 23 in the respective cover pieces 16, 17.
  • the anvil 21 projects with a spindle 24 out through the front cover piece 16 and carries a polygonal end portion 25 for cooperan'on with a socket wrench, not shown.
  • the anvil has a deep recess 26 bounded by cylindrical portions of the anvil 21 which are providedwith coaxial journal bearings 27 for a sealing member rotatably joumalled in the recess 26 and in the shape of a sealing rotor 28 with diametrically opposed wings 29, 30.
  • a sealing rotor 28 With rotation of the sealing rotor 28 the wings 29, 30 are arranged one after the other to sealingly sweep past the bottom of the recess 26, FIGS. 4b and 4d, respectively, at which instant the opposite wing 29 or 30, respectively, projects radially out beyond the periphery of the anvil 21.
  • the sealing rotor 28 is non-rotatably affixed to an axle 31 which is received rotatably by the journal bearings 27.
  • valve seat 32 in association with cross passages 33, 34 which via the valve seat connect the opposite sides of the sealing rotor 28 oppositely of the wings 29, 30 with one another.
  • Check valve means 35 provide a relief valve which coacts with the valve seat 32 within the sealing rotor 28.
  • the rear cover piece 17 carries a pivot 37 by means of which the impulse motor 15 including the housing 19 and cylinder 15 thereof are set into rotation with respect to the anvil 21.
  • Such rotation is provided by means of a suitable motor, not shown, which is carried within an outer housing 38 in which the impulse motor is supported rotatably by said motor and by the spindle 24 of the anvil 21 rotatably joumalled in the front portion of the outer housing 38 and projecting therefrom.
  • a central drive gear 39 In the interior of the rear cover piece 17 is fixed a central drive gear 39 which is in engagement with an intermediate gear 41 rotatably joumalled on a pivot 40 on the rear end of the anvil 21.
  • the intermediate gear 41 is in engagement with a gear 42 wedged to the axle 31 of the sealing rotor 28.
  • the ridge 44 coacts sealingly with the cylindrical back portion of the anvil 21 FIGS. 4b, 4d.
  • the cavity 43 which is filled by liquid such as oil there is diametrically at opposite side of the ridge 44 arranged a low ridge 45.
  • the latter is adapted for sealing coaction with the wings 29, 30 of the sealing rotor 28 FIGS. 4b, 4d.
  • the anvil 21 and the sealing rotor 28 will cyclically pass a sealing position in which the high ridge 44 seals against the back portion of the anvil 21 simultaneously with the low ridge 45 sealing against one of the wings 29, 30 on the sealing rotor 28, the other wing also simultaneously sealing against the bottom of the recess 26.
  • the cavity 43 is divided into two chambers 43, 43", one of them, 43, leading the high ridge 44 in the rotational direction and the other chamber 43 trailing said ridge 44.
  • valve controlled connection between the chambers 43, 43" consisting of a bore 46, FIG. 3, a bore 49 intersecting the latter and arranged coaxially in the spindle 24 and having an inner abutment 52 against which a ball valve 47 is urged by a spring 48.
  • the bore 49 is closed within the spindle portion 24 by a set screw 50 by aid of which the length of the spring 48 and thus the tension thereof may be set and the bore 49 communicates via a canted bore 51 with the chamber 43".
  • the socket wrench carried on the polygonal end portion 25 is applied on the nut to be tightened while the outer housing 38 is sustained by a suitable handle, not shown, and the motor thereof is started.
  • the rotation is transmitted to the pivot 37 and the cylinder 15 of the impulse motor 15 and if the nut is sitting loosely, it will be driven down against the support by the torque applied against the anvil 21 through friction in the impulse motor 15 until the anvil 21 stalls because of the resistance to movement.
  • the cylinder 15 on the other hand continues its rotation and the ridges 44, 45 thereof will rotate around the anvil 21 simultaneously with the gear drive 39, 41, 42 of the rear cover piece 17 forcing the sealing rotor 28 to rotate with half the velocity of the anvil 21 andthe ridges 44, 45.
  • this cyclical movement first passes the position of FIG. 40 upon clockwise rotation from a previously taken sealing position.
  • the anvil 21 and the sealing rotor 28 will again take sealing position in the cylinder 15'.
  • the ridge 44 strives in such position during continued rotation to decrease the volume of the chamber 43 and to increase the volume of chamber 43".
  • the sealing rotor is partly cylindrical designated by 54 and rotatably joumalled in the cylinder 15 in the cavity 43 oppositely to the low sealing ridge 45.
  • the anvil 21 is provided with diametrically opposed wings 55, 56 of which the shorter wing 55 coacts sealingly with the cylindrical portion of the sealing rotor 54 while the longer wing 56 is arranged to sealingly coact with the low ridge 45.
  • the sealing rotor 54 is provided with an arc shaped recess 57.
  • a relief valve 58 Centrally in the anvil 21 is rotatably joumalled a relief valve 58 with one or plural diametrical valve passages 59 which during rotation of the relief valve 58 can be aligned with diametrical cross passages 60 in the anvil 21 directed substantially perpendicularly to the diametrical plane in which the wings 55, 56 are disposed.
  • an intermediate plate 61 which together with the rear cover piece 17 forms a gear casing for a gear drive consisting of two gears 62, 63 of equal size.
  • One of the gears, 62 is wedged onto a ring shaped rear end portion 64 of the anvil 62 around the valve 58.
  • the other gear 63 is wedged on a pivot 65 which forms part of the sealing rotor 54 and is joumalled in and projects through the intermediate plate 61.
  • gear casing between the rear end piece 17 and the intermediate plate 61 there is disposed in combination with the gear drive 62, 63 a further gear drive 66, 67 in which one gear 66 is wedged on the pivot 65 and with the ratio 4:3 engages with the other gear 67 which is wedged to the relief valve 58.
  • This arrangement is such as to rotate the valve 58 one fourth of a revolution when the cylinder 15 rotates one revolution.
  • the gear drive 62, 63 and the further gear drive 66, 67 operate independently of each other.
  • both sets of gears includes one gear wedged on the same pivot 65, they are not inter-meshed with each other and the gear sizes of the various gears can be relatively easily changed to vary the rotational interrelationship of the elements to which the gears are connected.
  • the chambers 43, 43 in this position may be set into communication with one another via a spring loaded check valve 47, FIG. 5, so that the maximum value of the pressure impulse may be adjustably limited. Because of overflow via the check valve 47, compression of the liquid, as well as leakage between the chambers 43, 43", the volume of the liquid in the chamber 43 will decrease so that the cylinder 15 can pass the position shown in FIG. 8b and a new impulse cycle can be started in accordance with the above described sequence.
  • FIGS. 9-11 While in the two above described embodiments a pressure impulse is delivered each second revolution, in the embodiment of FIGS. 9-11 there is had one pressure impulse each third revolution.
  • the impulse motor is in this case in its basic construction substantially equal to the embodiment shown in FIGS. 14 but lacks check valve means. Instead, there is provided a relief valve 69 controlled by the rotation of cylinder 15.
  • the relief valve is rotatably joumalled in the anvil 21 in the diametrical plane which corresponds to the sealing position in the cylinder 15 of the sealing rotor 28 and the anvil 21.
  • the relief valve 69 is provided with a pair of axially aligned are shaped recesses 70 while the remaining third is intended for sealing coaction with the high ridge 44.
  • the cylinder 15 is provided with an eccentrical cylindrical cavity 43 for the anvil 21.
  • the anvil 21 is provided with a sealing vane 73 which is slidably guided in a diametrical groove 74 in the anvil 21 and is urged by springs 75 which in the groove 74 bear against the rear face of the vane 73, into sealing engagement against the inner surface of the cavity 43.
  • a relief valve 76 provided with a pair of axially aligned arc shaped recesses 77 is rotatably and sealingly guided in the anvil 21 and is connected to the gear 42 in a gear drive made in analogy with the above described gear drive 39, 41, 42 in FIG. 2 of the first embodiment.
  • the relief valve 76 will thus during rotation of the cylinder 15 rotate half a revolution for every full revolution of the cylinder 15.
  • the cylindrical portion of the relief valve 76 coacts sealingly with a ridge 78 provided in the wall of the cavity 43 at a location in which the distance of the ridge 78 to the rotational axis of the cylinder 15' is a minimum.
  • FIGS. 13a and 13b illustrate the sealing positions of the impulse motor in FIG. 12 subsequent to respectively a first and a second revolution of the cylinder 15 and to the anvil 21 having been stopped because of the resistance of the nut.
  • the relief valve 76 After a first revolution, FIG. 130, the relief valve 76 has turned through half a revolution and the recess 77 thereof communicates the chamber 43 with the chamber 43". No pressure impulse is thus generated in the chamber 43'.
  • FIG. 13b is reached in which sealing-relation is established between the ridge 78 and the sealing periphery of the relief valve 76.
  • a pressure impulse is generatedin the chamber 43 so that a torque impulse is applied against the anvil 21 and the vane 73.
  • the recesses 79 allow during continuous rotation of the cylinder 15 that the relief valve 76 can be turned to sealing positions without prior thereto disturbing the communication between the chambers 43, 43.
  • One impulse cycle would then include four subsequent sealing positions of which the three first cylinder revolutions would result in sealing positions with open communication between the chambers 43 and 43 via the recesses 77 while the fourth revolution of the cylinder 15 would give closed communication at the ridge 78 and the relief valve 76 for purposes of generating a pressure impulse.
  • An impulse motor comprising a housing
  • a rotatable cylinder in said housing, said cylinder having a liquid containing cavity therein;
  • an anvil rotatably mounted in said cavity of said cylinder
  • a sealing rotor rotatably mounted on said anvil in said cavity about an axis parallel with the longitudinal axis of said cylinder;
  • check valve means on said sealing rotor in said cavity, said check valve being movable to relief d closed positions, respectively, for relieving and closing said cavity portion relative to the remainder of said cavity;
  • said check valve means in dependence upon the rotation of said cylinder moving to a relief position during a first passage of said sealing rotor past said sealing position whereby said cavity portion is kept relieved in said cavity, and said check valve means moving to a closed position during a subsequent passage of said sealing rotor past said sealing position whereby a pressure impulse is produced in said cavity portion to rotate said anvil.
  • sealing positions are defined by a pair of diametrically opposed sealing ridges in said cavity one for sealing cooperation with said rotor and the other with said anvil.
  • An impulse motor comprising a housing
  • a rotatable cylinder in said housing, said cylinder having a liquid containing cavity therein;
  • an anvil rotatably mounted in said cavity of said cylinder
  • said sealing vane at a predetermined position in said cavity, together with said cylinder and said anvil once during each revolution of said cylinder, defining a sealing position for a portion of said cavity of decreasing liquid volume during continued rotation of said cylinder;
  • a relief valve rotatably mounted on said anvil in said cavity, said relief valve being movable between relief and closed positions, respectively, for relieving and closing said cavity portion relative to the remainder of said cavity;
  • gear means coupled between said cylinder and said relief valve for rotating said relief valve first to a relief position during a first passage of said sealing rotor past said sealing position whereby said cavity portion is kept relieved in said cavity, and for rotating said relief valve to a closed position during a subsequent passage of said sealing rotor past said sealing position whereby a pressure impulse is produced in said cavity portion to rotate said anvil.
  • An impulse motor comprising a housing
  • a rotatable cylinder in said housing, said cylinder having a liquid containing cavity therein;
  • an anvil rotatably mounted in said cavity of said cylinder with at least one passage being formed therein between said anvil and cylinder;
  • a sealing member movably mounted in said cavity on one of said cylinder and anvil;
  • said sealing member at a predetermined position in said cavity, together with said cylinder and said anvil and during relative rotation therebetween, defining a sealing position for a portion of said cavity of decreasing liquid volume during continued rotation of said cylinder;
  • said relief valve being movable to relief and closed positions, respectively, for relieving and closing said at least one passage thereby relieving and closing said cavity portion relative to the remainder of said cavity;
  • gear means operable independently of said sealing member but in timed relationship with said sealing member, controlling said relief valve in dependence upon the rotation of said cylinder for moving said relief valve to a relief position during a first passage of said sealing member past said sealing position whereby said cavity portion is kept relieved in said cavity, and for moving said relief valve to a closed position during a subsequent passage of said sealing member past said sealing position whereby a pressure impulse is produced in said cavity portion to rotate said anvil.
  • An impulse motor comprising a housing
  • a rotatable cylinder in said housing, said cylinder having a liquid containing cavity therein;
  • an anvil rotatably mounted in said cavity of said cylinder said anvil having at least one passage thercthrough;
  • a sealing rotor rotatably mounted on one of said cylinder and anvil in said cavity about an axis parallel with the longitudinal axis of said cylinder;
  • first gear means coupled between said sealing rotor and one of said cylinder and anvil for rotating said sealing rotor relative to said cylinder and anvil, said sealing rotor, at a predetermined position in said cavity, together with said cylinder, and said anvil once during each revolution of said cylinder, defining a sealing position for a portion of said cavity of decreasing liquid volume during continued rotation of said cylinder;
  • said relief valve being movable to relief and closed positions, respectively, for relieving and closing said at least one passage, thereby relieving and closing said cavity portion relative to the remainder of said cavity;
  • second gear means in said cylinder operable independently of said first gear means but in timed relationship with said sealing rotor, for rotating said relief valve to a relief position during a first passage of said sealing rotor past said sealing position whereby said cavity portion is kept relieved in said cavity, and for rotating said relief valve to a closed position during a subsequent passage of said sealing rotor past said sealing position whereby a pressure impulse is produced in said cavity portion to rotate said an vi].
  • said relief valve includes a valve body rotatably joumalled on said anvil in parallel relation thereto and in communication with said cavity, valve passages in said body for the relief of said portion of said cavity of decreasing liquid volume during continued rotation of said cylinder, and a gear drive between said cylinder and said valve body for rotating said valve body relative to said cylinder thereby controlling said body dependent upon the rotation of said cylinder.
  • An impulse motor in which said sealing rotor is rotatably joumalled on said cylinder about an axis parallel therewith, a main gear drive between said anvil and said sealing rotor for rotating said rotor relative to said cylinder and anvil, cross passages in said anvil for the relief of said cavity portion, said valve body being disposed to control said cross passages, and said gear drive of said valve body being connected to said main gear drive.
  • An impulse motor according to claim 11 in which said sealing positions are defined by a sealing ridge in said cavity diametrically opposed to said sealing rotor and for sealing cooperation with said anvil.
  • An impulse motor in which said sealing rotor is rotatably joumalled on said anvil, a main gear drive between said cylinder and sealing rotor for rotating said rotor relative to said cylinder and anvil, cross passages in said anvil for the relief of said cavity portion, said valve body being disposed to control said cross passages, and said gear drive of said valve body being connected to said main gear drive.
  • valve body includes a rotatable sealing plug in said anvil disposed in a diametrical plane with said sealing rotor for cyclical sealing cooperation with said cylinder.
  • An impulse motor according to claim 14 in which said sealing positions are defined by a pair of diametrically opposed sealing ridges in said E6ii one for sealing cooperation with said rotor and the other with said plug.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Hydraulic Motors (AREA)
  • Rotary Pumps (AREA)
US13283A 1969-02-28 1970-02-24 Impulse motor Expired - Lifetime US3672185A (en)

Applications Claiming Priority (1)

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SE2842/69A SE343231B (enrdf_load_stackoverflow) 1969-02-28 1969-02-28

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US3672185A true US3672185A (en) 1972-06-27

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US13283A Expired - Lifetime US3672185A (en) 1969-02-28 1970-02-24 Impulse motor

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US (1) US3672185A (enrdf_load_stackoverflow)
JP (1) JPS4926560B1 (enrdf_load_stackoverflow)
CA (1) CA920850A (enrdf_load_stackoverflow)
CH (1) CH504937A (enrdf_load_stackoverflow)
DE (1) DE2009324A1 (enrdf_load_stackoverflow)
FR (1) FR2032502B1 (enrdf_load_stackoverflow)
GB (1) GB1283471A (enrdf_load_stackoverflow)
NL (1) NL7002834A (enrdf_load_stackoverflow)
SE (1) SE343231B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105038A1 (en) * 1982-09-24 1984-04-04 Atlas Copco Aktiebolag A hydraulic torque impulse tool
US4635731A (en) * 1984-12-13 1987-01-13 Chicago Pneumatic Tool Company Impulse tool
US4836296A (en) * 1988-08-22 1989-06-06 Dresser Industries, Inc. Fluid pressure impulse nut runner
WO1991014541A1 (en) * 1990-03-29 1991-10-03 Chicago Pneumatic Tool Company Adjustable pressure dual piston impulse clutch
US5645130A (en) * 1994-12-30 1997-07-08 Atlas Copco Tools Ab Hydraulic torque impulse mechanism
US20120199372A1 (en) * 2009-07-29 2012-08-09 Hitachi Koki Co., Ltd., Impact tool
EP3632621A1 (en) * 2018-10-03 2020-04-08 Uryu Seisaku Ltd. Striking torque adjustment device of hydraulic torque wrench

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140173U (ja) * 1983-03-04 1984-09-19 瓜生製作株式会社 油圧式トルクレンチ
DE3347016A1 (de) * 1983-12-24 1985-07-18 Bijon 7433 Dettingen Sarkar Impulsschrauber
SE460713B (sv) * 1986-04-22 1989-11-13 Atlas Copco Ab Hydrauliskt momentimpulsverk
SE467487B (sv) * 1987-05-08 1992-07-27 Atlas Copco Ab Hydraulisk momentimpulsgenerator
DE3717630A1 (de) * 1987-05-26 1988-12-15 Gardner Denver Gmbh Hydro-impulsschrauber
SE9400270D0 (sv) * 1994-01-28 1994-01-28 Atlas Copco Tools Ab Hydraulic torque impulse generator
JP4890884B2 (ja) * 2006-03-01 2012-03-07 株式会社マキタ 油圧式トルクレンチ

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116617A (en) * 1961-12-12 1964-01-07 Ingersoll Rand Co Fluid impulse torque tool
US3196636A (en) * 1963-05-15 1965-07-27 Ingersoll Rand Co Sealing device for power tool
US3210963A (en) * 1962-12-12 1965-10-12 Ingersoll Rand Co Cushion type impulse tool
US3210961A (en) * 1962-12-12 1965-10-12 Ingersoll Rand Co Spindle means for an impulse tool
US3221515A (en) * 1962-12-12 1965-12-07 Ingersoll Rand Co Gear type impulse tool
US3263426A (en) * 1961-12-12 1966-08-02 Ingersoll Rand Co Power tool
US3292369A (en) * 1962-12-12 1966-12-20 Ingersoll Rand Co Impulse tool
US3334487A (en) * 1965-09-07 1967-08-08 Ingersoll Rand Co Impulse tool with improved cut-off device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116617A (en) * 1961-12-12 1964-01-07 Ingersoll Rand Co Fluid impulse torque tool
US3263426A (en) * 1961-12-12 1966-08-02 Ingersoll Rand Co Power tool
US3210963A (en) * 1962-12-12 1965-10-12 Ingersoll Rand Co Cushion type impulse tool
US3210961A (en) * 1962-12-12 1965-10-12 Ingersoll Rand Co Spindle means for an impulse tool
US3221515A (en) * 1962-12-12 1965-12-07 Ingersoll Rand Co Gear type impulse tool
US3292369A (en) * 1962-12-12 1966-12-20 Ingersoll Rand Co Impulse tool
US3196636A (en) * 1963-05-15 1965-07-27 Ingersoll Rand Co Sealing device for power tool
US3334487A (en) * 1965-09-07 1967-08-08 Ingersoll Rand Co Impulse tool with improved cut-off device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105038A1 (en) * 1982-09-24 1984-04-04 Atlas Copco Aktiebolag A hydraulic torque impulse tool
US4635731A (en) * 1984-12-13 1987-01-13 Chicago Pneumatic Tool Company Impulse tool
US4836296A (en) * 1988-08-22 1989-06-06 Dresser Industries, Inc. Fluid pressure impulse nut runner
WO1991014541A1 (en) * 1990-03-29 1991-10-03 Chicago Pneumatic Tool Company Adjustable pressure dual piston impulse clutch
US5092410A (en) * 1990-03-29 1992-03-03 Chicago Pneumatic Tool Company Adjustable pressure dual piston impulse clutch
US5645130A (en) * 1994-12-30 1997-07-08 Atlas Copco Tools Ab Hydraulic torque impulse mechanism
US20120199372A1 (en) * 2009-07-29 2012-08-09 Hitachi Koki Co., Ltd., Impact tool
US9616558B2 (en) * 2009-07-29 2017-04-11 Hitachi Koki Co., Ltd. Impact tool
EP3632621A1 (en) * 2018-10-03 2020-04-08 Uryu Seisaku Ltd. Striking torque adjustment device of hydraulic torque wrench

Also Published As

Publication number Publication date
CH504937A (de) 1971-03-31
FR2032502B1 (enrdf_load_stackoverflow) 1974-07-05
NL7002834A (enrdf_load_stackoverflow) 1970-09-01
SE343231B (enrdf_load_stackoverflow) 1972-03-06
DE2009324A1 (de) 1970-10-08
FR2032502A1 (enrdf_load_stackoverflow) 1970-11-27
CA920850A (en) 1973-02-13
JPS4926560B1 (enrdf_load_stackoverflow) 1974-07-10
GB1283471A (en) 1972-07-26

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