Cleansing Fluid Pump Operated By Drive Patents (Class 173/75)
  • Patent number: 9943940
    Abstract: A power tool includes a drilling tool and a dust collector configured to be removably attached to the drilling tool. The dust collector includes a dust collector body, a passage part provided in the dust collector body and having elasticity, and a storing part configured to be removably attached to the dust collector body and to store dust. The passage part includes a drilling tool mounting port part configured to be connected to the drilling tool while pressing a specified region of the drilling tool, and a storing part mounting port part configured to be connected to the storing part while pressing a specified region of the storing part. Air containing the dust is led through the dust collector body to the storing part, and the air from which the dust has been separated in the storing part is led through the passage part into the drilling tool.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: April 17, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Masanori Furusawa, Hideki Tsuji
  • Patent number: 9067292
    Abstract: A vacuum device for a drilling hand tool includes a housing, a connection piece, a blower, and a collecting vessel. A drilling tool can be plugged into and through the connection device along a working axis. The blower conveys dust-laden air from the connection piece into the collecting vessel. The connection vessel includes a tray cartridge which can be removed from the housing, and a locking bar. The locking bar is hinged on the tray cartridge or on the housing and can pivot between a locking position and an unlocked position. When the locking bar is in the locking position, it presses the tray cartridge against the housing to provide pretensioning.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: June 30, 2015
    Assignee: HILTI AKTIENGESELLSCHAFT
    Inventor: Hans Appel
  • Patent number: 9056379
    Abstract: In a power tool dust collecting device, a blocking ring that is subject to elastic deformation upon contact with a workpiece surface for blockage between a suction head and the workpiece surface is provided to the front surface of the suction head to be brought into contact with the workpiece surface. The blocking ring has a ventilating portion (a V-shaped slit) that ensures the flow of air to the suction head regardless of whether the elastic deformation has occurred.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: June 16, 2015
    Assignee: MAKITA CORPORATION
    Inventors: Kiyonobu Yoshikane, Yoshitaka Machida
  • Publication number: 20140020919
    Abstract: A rotary tool includes a motor having an output shaft, the output shaft defining an axis of rotation. The motor is configured to rotate the output shaft in a first direction about the axis of rotation. An accessory tool retention mechanism is attached to a distal end portion of the output shaft and configured to releasably retain an accessory tool in alignment with the axis of rotation. A fan mechanism includes a plurality of fan blades attached to the accessory tool retention mechanism and extending radially outwardly therefrom. The plurality of fan blades are configured to move air forwardly in a direction that is generally parallel to the axis of rotation as the accessory tool retention mechanism is rotated in the first direction by the output shaft.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 23, 2014
    Applicants: ROBERT BOSCH GMBH, ROBERT BOSCH TOOL CORPORATION
    Inventors: Christopher Ryan Dvorak, Balazs Nagy, Wayne F. Adolf, Edward G. Ennis, Jie Liu
  • Publication number: 20130337728
    Abstract: A portable power tool includes a motor located in a motor housing of the tool and having a rotary output shaft, a working part arranged to be driven by the rotary output shaft, a dust collection container arranged to collect dust produced by the operation of the power tool on a workpiece during use, and a fan. The fan is arranged to be rotated about an axis by the motor to convey the dust to the dust collection container, the axis of rotation of the fan being non-coaxial with the rotary output shaft of the motor. A part of an exterior surface of the dust collection container is formed as a recess into which the motor housing at least partly extends, such that the dust collection container extends at least partly around the motor housing.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Applicant: BLACK & DECKER INC.
    Inventors: Andrew WALKER, Frederick R. BEAN, John S. VANTRAN
  • Patent number: 8573323
    Abstract: A hand-held power tool has a tool member and a motor drivingly connected to the tool member, wherein the motor is arranged in a motor housing. A battery for driving the tool member is provided. A guide shaft has arranged on its first end the battery and on its second end the motor housing and the tool member. A rotatably power output part arranged on the motor housing is drivingly connected to the motor. The power output part supports the tool member. Cooling air is sucked through the guide shaft into the motor housing. Between the power output part and the motor housing an annular air exit gap is formed through which the cooling air exits the motor housing. At least one guide vane that projects into the annular air exit gap is provided.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: November 5, 2013
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Matthias Müller, Heiko Roβkamp, Gernot Liebhard, Michael Renz
  • Publication number: 20130284475
    Abstract: To provide a hand-held power tool which is equipped with a motor and can be used in a normal driving mode for a tip end tool and also in driving modes other than the normal driving mode. A power tool in which a tip end tool is driven by a motor to thereby perform a predetermined machining process on a workpiece, wherein the motor is a dual rotor motor comprising: an inner rotor; an outer rotor; and a stator including a driving coil mechanism, with the inner rotor and the outer rotor being coaxially disposed.
    Type: Application
    Filed: November 28, 2011
    Publication date: October 31, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Shinji Hirabayashi, Kenichi Ota
  • Publication number: 20130255983
    Abstract: A dust extraction system for a power tool having a output shaft, a collet configured for engaging a tool bit and a collet nut engageable to the output shaft, comprises a base configured for mounting on the power tool, the base defining a cavity having an opening for passage of the output shaft therethrough and a discharge chute in communication with the cavity. The system further includes an impeller sized and configured to be rotatably received within the cavity, including a hub and a plurality of vanes emanating from the hub configured to draw dust from the workpiece into the cavity and to direct the dust through the discharge chute. A collet nut is integrated into the hub of the impeller so that the impeller can be directly mounted to the output shaft of the power tool while clamping the collet onto the tool bit.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 3, 2013
    Applicants: ROBERT BOSCH GMBH, ROBERT BOSCH TOOL CORPORATION
    Inventors: Jeremy Rubens, Jaime Moreno, Chastity Martinez
  • Publication number: 20130213681
    Abstract: Disclosed is a feature that collects dust particles that arise from a processing operation of an impact tool. The dust collection device collects dust that arises from of a processing operation and is attached to the impact tool that performs a pre-determined processing operation on a processed member by way of a tool bit mounted to the tip region of the tool body being linearly operated at least in the lengthwise direction. The dust collection device has a dust collection unit of which the tip opens as a dust intake port and the contour shape is formed unevenly around the long axis of the tool bit. The position of the dust collection unit is freely selected around the long axis of the tool bit, and it is possible to cause the position to change around the long axis of the bit.
    Type: Application
    Filed: July 4, 2011
    Publication date: August 22, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Hiroki Ikuta, Ken Yamauchi, Takamasa Hanai, Masao Miwa, Tomohiro Ukai, Shusaku Wakatsuki, Akihiro Ito
  • Patent number: 8186453
    Abstract: It is an object of the invention to provide an effective technique for reducing adverse effect of a dust suction device on the operability of a power tool, in the power tool which can suck dust generated during operation. The power tool has a motor 111 and a tool body 103 that houses the motor 111. A tool bit 119 is coupled to a tip end region of the tool body and driven by the motor 111 to perform a predetermined operation. The power tool further includes a dust suction part 151 through which dust generated during operation by the tool bit 119 is sucked and which covers at least a tip end of the tool bit 119, a dust transfer passage 153 through which the dust sucked into the dust suction part 151 is transferred and which is partly disposed within the tool body 103, and a dust discharge port 174 through which the dust transferred through the dust transfer passage 153 is discharged to the outside. Further, the dust discharge port 174 is disposed on the opposite side of the motor 111 from the tool bit 119.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: May 29, 2012
    Assignee: Makita Corporation
    Inventors: Masanori Furusawa, Yoshihiro Kasuya, Hajime Takeuchi
  • Publication number: 20120043101
    Abstract: A hammer drill includes a dust collector engaged with a housing by sliding. An engagement protrusion, which can engage and disengage with a rear engagement recessed portion provided on a guide groove of the housing, is provided at a position where the dust collector engages with the housing and biased in the direction of engagement with the rear engagement recessed portion. A front engagement recessed portion is also provided on the guide groove, and can engage with the engagement protrusion at a slide position of the dust collector in front of the engagement position. By engaging the engagement protrusion with the front engagement recessed portion, the dust collector can be fixed to the housing even at the slide position.
    Type: Application
    Filed: July 22, 2011
    Publication date: February 23, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Yoshiaki ISHIKAWA, Kiyonobu YOSHIKANE, Yoshitaka MACHIDA
  • Publication number: 20110226499
    Abstract: A dust box joined to a dust collecting device is formed of a box body, and a lid body that is joined to the box body by a hinge and can open and close an opening of the box body, and a main filter and a pre-filter are attached to the lid body.
    Type: Application
    Filed: February 17, 2011
    Publication date: September 22, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Yasuhiro KAKIUCHI, Yoshitaka MACHIDA
  • Patent number: 7909114
    Abstract: A drilling device includes an end cutting tool, a main housing, a motor, a transmission, and a dust collection unit. The end cutting tool processes a workpiece. The motor is provided in the main housing for generating a torque. The transmission transmits the torque to rotate the end cutting tool. The dust collection unit collects dust generated by the rotation of the end cutting tool. The dust collection unit includes a dust case for accumulating the dust therein. The dust case is detachable from the main housing and has an inlet and an outlet. The inlet and the outlet are oriented in a single direction.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: March 22, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Tomomasa Nishikawa, Kenji Kobori
  • Patent number: 7740086
    Abstract: A suction device (11) for a hammer drill (6) has a first end (12) with a securing device (14) for securing the suction device (11) to the hammer drill (6) and a second end (13) opposite first end (12) and which has a contact area (15) with which the suction device (11) contacts a constructional component, the suction device (11) further having a receiving space (20) which at least partially encloses a working tool (7) of the pick power tool (6), and being provided with a connection device (18) for a vacuum source. A retaining element (21) having a through-opening (22) for the working tool (7) and a plurality of suction openings (23) is provided in an area (19) of the second end (13).
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: June 22, 2010
    Assignee: Hilti Aktiengesellschaft
    Inventors: Jochen Bleicher, Oliver Ohlendorf
  • Publication number: 20100000386
    Abstract: The invention relates to a manual drilling or milling apparatus with a suction device, especially for cutting windscreens of motor vehicles, comprising a housing fixed at the drilling or milling head in which a radial impeller is rotatably supported which can be driven by the drilling or milling head, a suction pipe which is telescopically adjustable at the housing and through which the drill or milling cutter extends, and a catchment tank connected to the housing.
    Type: Application
    Filed: May 15, 2007
    Publication date: January 7, 2010
    Inventor: Josef Dagn
  • Patent number: 7556457
    Abstract: A compact drilling system capable of improving working efficiency. The drilling system includes a drilling machine and a compressor. A control circuit controls performances of a drill motor in the drilling machine and an air compression motor in the compressor based on the detection result of a pressure sensor that detects a pressure within an air tank provided in the compressor. When one of the motors is activated, the other motor is not allowed to be operated and only when the drill motor is activated, compressed air is supplied from the air tank to the drilling machine. An electrical socket is provided in the compressor. A power cord extending from the drilling machine can be connected to the socket.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: July 7, 2009
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Oda, Yukio Terunuma, Masayuki Ogura
  • Patent number: 7475739
    Abstract: A power tool (10) with a housing (12) that includes a dust box (50, 150) and a motor (20) with air cooling, and a cooling exhaust-air duct (44, 46) and a chip suctioning duct (40) which guides a chip-suctioning flow can be used with improved performance and in an environmentally friendlier manner due to the fact that the cooling air flows across the dust box (50, 150) under favorable flow conditions, whereby the evacuation of dust into the dust box (50, 150) is improved and whirls of dust caused by cooling air in the tool region are prevented from forming.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: January 13, 2009
    Assignee: Robert Bosch GmbH
    Inventor: Steffen Wuensch
  • Patent number: 7354226
    Abstract: A hand-held power tool (2) connectable with a dust suction module (32) includes a motor (64) and an air flow generator (66) which for cooling the motor (64) is located, together with the motor (64), in air flow path (62) between an air inlet and an air outlet (16) both formed in the tool housing, (4, 6), with an air inlet having a side opening (18) and a connection opening (20) connectable with the suction path (60) of the dust suction module (32) and the dust suction module (32) having a suction conduit (58) for connecting the suction path (60) with the air flow path (62) and adjoining the connection opening (20) in a connected condition of the dust suction module (32) with the power tool, and with the power tool (2) further having a closing member provided on the connection opening (20), operable by the dust suction module (32), and having, in an attached position of the dust section module (32), an open position, and having a closed position in the detached condition of the dust suction module (32).
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: April 8, 2008
    Assignee: Hilti Aktiengesellschaft
    Inventor: Rory Britz
  • Patent number: 7017680
    Abstract: An electrically powered tool having a dust collection unit powered by a motor, which unit can be releasably fitted to the tool includes a plug arrangement and a cooperating socket arrangement, one of which is formed on the tool and the other of which is formed on the unit. A first mechanical fixing arrangement is provided comprising a first projection and a first cooperating recess, one of which is formed on the tool and the other of which is formed on the unit. A second mechanical fixing arrangement is provided and comprises a manually actuable releasable latch arrangement and a second cooperating recess, one of which is formed on the tool and the other of which is formed on the unit. The first and second mechanical fixing arrangements cooperate to secure the dust collection unit to the tool in such a way that the plug and socket arrangements form an electrical connection.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: March 28, 2006
    Assignee: Black & Decker Inc.
    Inventors: Klaus-Dieter Arich, Thomas Stanke, Ernst Staas, Ralf Bernhart, Rosi Wache, legal representative, Robert Wache, deceased
  • Publication number: 20040011543
    Abstract: A dust suppression guard includes a shroud defining an enclosed space. The guard also includes a clamp mounted adjacent a first end of the shroud, a reinforcing member attached to a central portion of the shroud, and a boot attached adjacent a second end of the shroud. The dust suppression guard also includes a hose mounted to and extending through the shroud in communication with the enclosed space. A dust suppression system may include a vacuum source having an attached vacuum hose, where the vacuum hose connects to the hose mounted to and extending through the shroud.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 22, 2004
    Applicant: Ohio State Home Services
    Inventors: Carl Moore, Sam Mazzo, Walter Barnette
  • Patent number: 6641634
    Abstract: A manual machine tool (10) includes a vacuum device for dust removal (19) situated in its housing (12) and a blow-out connection (20) installed after this. A dust collection box (21), particulaily self-contained, can be attached in detachable fashion to the blow-out connection (20) via its blow-in connection (22). The dust collection box (21) is airtight on all but two sides and has air-exit holes (40) on the top side (36) and a dustproof filter element (48)—especially a fluted filter—on the inside. The dust collection box is particularly secure against the unintentional escape of dust after the dust collection box is detached from the associated manual machine tool because a pair of sealing lips (500) arranged as a separate part is provided inside the blow-in connection (22), which pair of sealing lips (500) is connected as a single part with closing flaps (520, 520) projecting into the interior of the dust collection box (210).
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: November 4, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Doris Reich, Steffen Wuensch, Andreas Hoffman, Ulrich Mueller-Boysen, Franz Scheschark
  • Patent number: 6481507
    Abstract: A doweling hole drilling machine includes a vehicle such as a tractor having a frame pivotally mounted to the side of the tractor. The frame is moveable around an axis parallel to the longitudinal axis of the vehicle from a first horizontal orientation to a second vertical orientation, and the raising or lowering of the frame is powered by hydraulic cylinders. Positioned on the frame is a plurality of parallel mounted spaced drilling machines, each of which is positioned for drilling a hole perpendicular to the longitudinal axis of the vehicle. Each of the drilling machines is mounted on a drive assembly for moving the machine axially to thereby force a drill bit in the machine to drill a hole. The frame is laterally adjustable in a horizontal direction perpendicular to the longitudinal axis of the tractor and the lateral adjustment is hydraulically powered. The frame is also horizontally adjustable to position the drills to bore at the desired depth into a slab of concrete.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: November 19, 2002
    Inventor: Paul Kromray, Jr.
  • Patent number: 5772367
    Abstract: An attachment for a rotating tool bit provides air flow in the vicinity of the work area without the need for separate vacuum or compressed air supplies. The device is mounted on the shaft of the rotating tool bit and provided with a plurality of vanes which direct airflow through a cylindrical housing towards or away from the work area. A central aperture provides resilient mounting of the attachment to the tool bit. The attachment is capable of providing suction as well as forced-air to the work area. A number of embodiments are disclosed for directing the exhausted air in different directions, depending on the application of the tool and operator orientation. A filter may be incorporated into the attachment in order to collect dust and debris carried away from the work area by the air flow.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: June 30, 1998
    Inventor: Elie C. Daniel
  • Patent number: 5467835
    Abstract: A drilling or chiseling tool includes a suction apparatus (8) releasably mounted on a housing (1) of the tool. The suction apparatus (8) contains a replaceable separating device (11) formed of a housing (13) subdivided into two separate chambers (K1, K2) by a filter element (14) replaceably fitted in the housing. Each chamber (K1, K2) has an aperture (12, 15) and the cross-sections of the apertures extend at right angles to one another.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: November 21, 1995
    Assignee: Hilti Aktiengesellschaft
    Inventors: Josef Obermeier, Ulrich Muller-Boysen, Siegfried Keusch, Peter Gaffal
  • Patent number: 5199501
    Abstract: A drilling or chiseling tool (1) includes a suction device (2) with a suction head (3), a suction line (4) extending from the suction head to a suction blower wheel (5) and a separating device (6). The suction device (2) is detachably connected with the tool (1). When connecting the suction device (2) to the tool (1), the shaft (9) of the suction blower wheel (5) can be coupled with the drive shaft (8) of a drive motor (7) for the tool.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: April 6, 1993
    Assignee: Hilti Aktiengesellschaft
    Inventors: Wilhelm Kluber, Gebhard Gantner, Peter Brix, Max Dietrich
  • Patent number: 5129467
    Abstract: An electric hammer drill including a vacuum dust collecting device for collecting dust from an area of an article being drilled by a drill bit wherein a hose extending from a body of the hammer drill is directly connected to an end of a movable first pipe which is slidably received in a stationary second pipe. A fan for transporting the dust by vacuum is fixed on a shaft extending across a dust collecting chamber in the body. The shaft is coaxial with, and releasably coupled with, an armature shaft of a motor. With this releasable coupling, the armature shaft is relatively short and unlikely to bend or flex, so that vibration produced during a drilling operation is small. During the drilling operation, the first pipe slides back and forth along the second pipe as a suction hood moves in a direction opposite to the direction of movement of the drill bit.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: July 14, 1992
    Assignee: Hitachi Koki Company Limited
    Inventors: Yoshihiko Watanabe, Yasuki Ohmori, Masaaki Sekizawa
  • Patent number: 5113951
    Abstract: This invention relates to a device for driving a drilling or percussion tool having a spindle that rotates with respect to a housing. One end of the spindle is adapted to fasten to a tool piece and the other end is connected to an oscillating percussion body movable in the housing by means of a guideway. A drive shaft rotates the tool spindle into rotation or actuates the percussion body via a transmission that is provided with means for converting the rotary motion of the drive shaft into an oscillatory motion of a drive member. The drive member is connected to the percussion body through an elastic member having a non-linear sping characteristic.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: May 19, 1992
    Assignee: Emerson Electric Company
    Inventors: J. P. Houben, A. J. Moolenaar
  • Patent number: 5090499
    Abstract: A device for sucking up material removed by the bit of a portable drill is made in the form of a casing provided with means for securing it to the drill and having at least one portion constituting a handle to enable it to be gripped in one hand by the operator. The device comprises a suction head fitted slidingly on the casing to enable it to be kept close to the point of penetration into the surface of a body to be drilled by the bit fitted on the drill. Disposed inside the casing of the device are a fan with intake connected to said head through a connecting duct and with outlet blowing into a container, supported by the casing, for collecting the aspirated material, an electric motor to actuate the fan, electric batteries to supply power to the motor through an operating switch. The casing of the drill alternatively comprises an electric socket designed to receive a corresponding plug mounted on the vacuum device so as to supply power to the fan motor by taking it from the power supply of the drill.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: February 25, 1992
    Assignee: Black & Decker Inc.
    Inventor: Giuseppe L. Cuneo
  • Patent number: 4921375
    Abstract: An antiscattering device for the collection of waste material (dust, shavings) produced in the course of drilling, milling and similar operations, to be fitted in the most appropriate way on machine tools and basically made up of a bellows shaped bell (e.g. frustum-conical), provided, if required, with an axially elastic vacuum cleaner or extractor--which can be fitted on the machine tools themselves. This bell is permanently or temporarily secured to the frames of machine tools (e.g. manually, on a drill), coaxially to the drill bit while its base, provided with a seal ring, rests on the surface of the material to be drilled, thereby creating, with its shell, a receptacle where the waste material collects.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: May 1, 1990
    Assignee: Tiziana Lenarduzzi
    Inventor: Giovanni Famulari
  • Patent number: 4512417
    Abstract: This invention pertains to a hydraulic reciprocating device having a housing and a piston in the housing. The piston has a first and second surface, and a means for intermittently communicating the first surface of the piston with a hydraulic pressure source. Also provided is a means for continuously communicating the second surface of the piston with pressurized fluid such as pneumatic fluid. The piston moves in a first direction when the hydraulic pressure source communicates with the first surface of the piston and the piston moves in a second direction when the hydraulic pressure source does not communicate with the first surface of the piston.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: April 23, 1985
    Assignee: Ingersoll-Rand Company
    Inventor: Ewald H. Kurt
  • Patent number: 4209069
    Abstract: A drill is disclosed having a shroud structure extending about a chuck and drill bit at the forward end of the tool, to receive cuttings produced by the bit, and having a receptacle preferably carried at the rear end of the drill and to which the cuttings are withdrawn by a flow of air. In one form of the invention, the air movement is induced by aspirator action, while in another form a rotary air pump driven by the motor of the drill creates the suction effect. The receptacle may take the form of a cup detachably connectible to the body of the drill, and in the aspirator form of the invention the aspirating passages may be formed in an end wall of this cup. The shroud structure may include a sleeve disposed about the drill bit, and having a lug projecting inwardly to a position to contact and break up cuttings formed by the bit before they are withdrawn to the accumulation receptacle.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: June 24, 1980
    Assignee: Lockheed Corporation
    Inventor: Bruce W. Smith
  • Patent number: 4192390
    Abstract: A power tool, particularly a hammer drill, is equipped with a blower which is mounted on the output shaft of the motor which drives the tool element which is clamped in the chuck of the power tool. The particulate material which is removed by the tool element from a structure is entrained in a stream of air generated by the blower and conveyed toward the latter. Before the particulate material enters the blower, at least most of it impacts an impact member which extends across an inlet section of the conduit through which the stream of air passes, so that the impact member deprives the entrained particulate material at least of the greater part of the kinetic energy possessed thereby, before the particulate material reaches the blower and damages the same due to its high kinetic energy.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: March 11, 1980
    Assignee: Robert Bosch GmbH
    Inventors: Karl Wanner, Wilbert Reibetanz
  • Patent number: 4036308
    Abstract: In the process and apparatus for removing the drillings from the drilling te of a drill described, removal is effected through a conduit, extending along the axis of a drill and possibly an adapter for a drilling machine, by a vacuum provided by a compressed-air stream traversing the removal conduit, said compressed air also serving to blow the drillings sucked into the conduit out of the conduit and away from the drilling site.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: July 19, 1977
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Hugo Dellenberg
  • Patent number: 3973633
    Abstract: A hammer mechanism is disclosed, which incorporates a hammer piston driven by a driving piston via a pressure-gas cushion in a working chamber. The hammer piston controls the transference of flushing gas from the working chamber to the tool during normal operation and has an extreme position in which the hammer piston does not interfere with the transference of flushing gas.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: August 10, 1976
    Assignee: Atlas Copco Aktiebolag
    Inventor: Kurt Osten Brannstrom