In Uniplanar Compound Path Patents (Class 30/393)
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Patent number: 12138698Abstract: A reciprocating saw includes a housing; a motor, disposed in a housing accommodating space and having a winding extending along a first straight direction; a first transmission wheel connected to the motor; and an input shaft driven by the motor to carry out reciprocating motion. The first transmission wheel is fixed in the accommodating space along a support shaft extending along a second straight direction, and is driven by the motor to rotate about a second straight line; the winding includes a first end and a second end along the first straight direction, a first plane perpendicular to the first straight line passes through a first end face of the first end and a second end perpendicular to the first straight line passes through a second end face of the second end; the first plane is parallel with the second plane, and the winding is located between the first plane and the second plane; at least part of the support shaft is located between the first plane and the second plane.Type: GrantFiled: December 12, 2019Date of Patent: November 12, 2024Assignee: Hilti AktiengesellschaftInventors: Masatoshi Fukinuki, Yang Zhou, Hao Gao
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Patent number: 12030129Abstract: A power tool includes a prime mover, an output shaft that extends along a first direction and retains a tip tool and is driven by the prime mover, a support member that supports the output shaft to be drivable, a gear that rotates around an axis extending in a second direction crossing the first direction and transmits a power of the prime mover to the output shaft, and a gear cover that accommodates the gear and the support member. Inside the gear cover, a lubricant retention portion capable of retaining a lubricant is arranged at a side of the support member, and the lubricant retention portion is partitioned from a gear accommodation portion that accommodates a gear by a wall extending in a direction intersecting an extending direction of the output shaft in the gear cover.Type: GrantFiled: November 29, 2019Date of Patent: July 9, 2024Assignee: Koki Holdings Co., Ltd.Inventors: Ryosuke Nakano, Yoshikazu Yokoyama, Ken Inui
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Patent number: 11628508Abstract: A reciprocating cutting tool is provided, wherein the tool has a reciprocating saw mode and a jig saw mode. The tool includes a reciprocating mechanism; an actuating mechanism and a cutter-lifting mechanism. The reciprocating mechanism includes a reciprocating rod and the cutter-lifting mechanism includes an actuating member and a pushing member. The actuating member includes a first engaging portion and a second engaging portion when the reciprocating rod is driven to perform a reciprocating motion, the reciprocating rod drives the pushing member to deflect close to the first engaging portion or second engaging portion; when the first engaging portion or the second engaging portion is driven to move close to the pushing member, the first engaging portion or second engaging portion pushes the pushing member towards the side which the first engaging portion or the second engaging portion deflects to force the reciprocating rod to implement a cutter-lifting motion.Type: GrantFiled: January 18, 2019Date of Patent: April 18, 2023Assignee: POSITEC POWER TOOLS (SUZHOU) CO., LTD.Inventors: Liangbing Liu, Guojun Chen, Mingxing Yan
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Patent number: 11260209Abstract: A microneedling machine for tattooing is disclosed, which has a substantially radially symmetric exterior shape and may include subcomponents that can be disassembled and sterilized. The machine may include an adjustment mechanism for configuring the impact of the microneedle into skin. The machine may also include a motion translation device adapted to change rotational motion of the drive shaft or motor into linear reciprocating motion of the microneedle.Type: GrantFiled: August 29, 2018Date of Patent: March 1, 2022Assignee: FK Irons Inc.Inventor: Gaston Siciliano
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Patent number: 10960474Abstract: An electric tool includes a rotary wheel driven to rotate around a central axis thereof, an action member configured to bear a cutter of the electric tool, and a counterweight. The rotary wheel drives the action member such that it reciprocates linearly in a first direction. The rotary wheel simultaneously drives the counterweight such that it not only reciprocates linearly in the first direction in an opposite manner to the action member, but also performs reciprocating swinging movement in a plane perpendicular to the central axis. The first direction is parallel to the plane.Type: GrantFiled: May 23, 2018Date of Patent: March 30, 2021Assignees: Bosch Power Tools (China) Co., Ltd., Robert Bosch GmbHInventor: Jia Wang
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Patent number: 10828707Abstract: The present disclosure relates to a hand-held machine tool. The hand-held machine tool includes: a first moving component as a main vibration source, the first moving component reciprocating substantially in a straight line in a first direction; a second moving component as a secondary vibration source, the second moving component having a movement state different from that of the first moving component; and a balancing block, with a linear movement direction of the balancing block being a second direction in a different plane from that of the first direction, and a movement pace of the balancing block being opposite to that of the first moving component.Type: GrantFiled: September 28, 2016Date of Patent: November 10, 2020Assignees: Bosch Power Tools (China) Co., Ltd., Robert Bosch GmbHInventor: Jia Wang
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Patent number: 10471525Abstract: A saber saw (1) for processing a workpiece, in particular a mineral or metallic material, including a drive (20), and a reciprocating rod (60) having a first end (63), a second end (68) and a drive point (69). Moreover, a first articulated rod (40) having a pivot point (42) and a connection point (44) as well as a second articulated rod (50) having a first pivot point (52) and a second pivot point (54) are provided, whereby the pivot point (42) of the first articulated rod (40) can be rotatably connected to the drive point (69) of the reciprocating rod (60), and the connection point (44) of the first reciprocating rod (40) can be non-rotatably connected to the drive (20) by-a connection mechanism (70), and whereby the drive (20) can be situated at least partially in a drive housing.Type: GrantFiled: August 12, 2014Date of Patent: November 12, 2019Assignee: Hilti AktiengesellschaftInventor: Guenter Haas
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Patent number: 9925684Abstract: A cut length indicating device for a portable machine tool includes at least one indication unit. The indication unit has at least one movably mounted indication element that is configured to indicate at least one position of a cutting edge of a machining tool on a work piece to be machined with reference to a set cutting depth of the machining tool. The indication element further has a cutting edge indication line, which runs at least substantially transversely to a movement plane of the indication element in order to indicate the position of the cutting edge in at least one operating state.Type: GrantFiled: June 14, 2013Date of Patent: March 27, 2018Assignee: Robert Bosch GmbHInventors: Bruno Sinzig, Christian Bermes, Andreas Arn
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Patent number: 9844823Abstract: A jigsaw that includes a housing assembly, a shoe member and an indicator. The housing assembly has a housing, a motor and transmission assembly received in the housing, an output member reciprocatingly driven by the motor and transmission assembly, and a trigger coupled to the housing and configured to control operation of the motor and transmission assembly. The housing defines a window. The shoe member is pivotally coupled to the housing. The indicator is pivotally disposed in the housing. A portion of the indicator is visible through the window. Movement of the indicator is responsive to movement of the shoe member such that a rotational position of the indicator is indicative of a position of the shoe member relative to the housing assembly.Type: GrantFiled: March 23, 2012Date of Patent: December 19, 2017Assignee: BLACK & DECKER INC.Inventor: Brent A. Kuehne
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Patent number: 9815163Abstract: A method includes receiving a first alignment state indication at a portable handheld tool from an alignment tool. The first alignment state indication indicating an alignment state of a workpiece relative to a reference that is independent and distinct from the portable handheld tool. The method also includes, based on the first alignment state indication, enabling a first selectable drive state of a drive system of the portable handheld tool. The method further includes actuating the drive system responsive to user input, where the drive system is limited based, on the first selectable drive state.Type: GrantFiled: May 4, 2014Date of Patent: November 14, 2017Inventor: Jason L Moore
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Patent number: 9358624Abstract: For a machine tool designed in particular as a saber saw, a configuration including a carrying frame is provided, via which the lifting rod and the support element are joined to form a unit that can be rotated about the longitudinal axis of the power tool, is mounted on the casing side, and guides a drive part of the lift drive on the lifting rod side.Type: GrantFiled: November 17, 2009Date of Patent: June 7, 2016Assignee: Robert Bosch GmbHInventors: Florian Bantle, Hans Kaiser, Thilo Koeder, Joachim Platzer, Ulli Hoffmann, Jan Koegel, Marcel Casota
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Publication number: 20150143706Abstract: An oscillatory drive is specified, having a housing in which there are accommodated a drive motor for driving a motor shaft in rotation and a tool spindle, and a first coupling drive mechanism which is coupled to the motor shaft and to the tool spindle for the purpose of driving the tool spindle in oscillatory fashion about its longitudinal axis, wherein a second coupling drive mechanism is coupled to the tool spindle such that the tool spindle performs a superposed movement composed of a rotary oscillating movement and a movement directed perpendicular to its longitudinal axis.Type: ApplicationFiled: November 19, 2014Publication date: May 28, 2015Inventor: Fabian Bek
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Patent number: 8931574Abstract: A lubrication structure for a working machine is provided. A driven gear that engages with a driving gear connected to a driving source and rotates, is accommodated in a chamber in a case. An eccentric cam is provided on a surface of the driven gear, and connected to a coupling pin in a blade through a crank member. A fitting ring part is provided in one end of the crank member, and the eccentric cam is inserted into the fitting ring part so as to rotate relative to the fitting ring part. An annular groove is formed on the inner surface of the fitting ring part which faces the outer surface of the eccentric cam. The annular groove communicates with a first chamber via a first lubricating passageway and also communicates with a second chamber via a second lubricating passageway.Type: GrantFiled: February 3, 2010Date of Patent: January 13, 2015Assignee: Makita CorporationInventor: Koji Watanabe
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Patent number: 8925208Abstract: The disclosure provides a transverse guide of a saw blade for a machine tool, particularly for a hand-guided machine tool in the form of a band saw or jigsaw, wherein the saw blade can be rotated about the longitudinal axis thereof by way of said guide in the opposite direction to said forces as a function of transverse and/or torsional forces acting on the saw blade.Type: GrantFiled: March 30, 2009Date of Patent: January 6, 2015Assignee: Robert Bosch GmbHInventors: Stefano Delfini, Thilo Koeder, Joachim Platzer, Ulli Hoffmann
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Patent number: 8826547Abstract: Embodiments are disclosed for a reciprocating saw that comprises a housing, a drive mechanism in the housing, a motor in the housing for driving the drive mechanism, an elongated plunger located in the housing for reciprocating motion and having a front end portion for attaching a saw blade for cutting material, the saw having an energy absorbing compliant configuration at least partially isolating a portion of the plunger and the drive mechanism from high energy impulses that can be produced by the saw blade being bound in the material being sawed during operation of the saw.Type: GrantFiled: November 25, 2008Date of Patent: September 9, 2014Assignee: Robert Bosch GmbHInventor: Stephen C. Oberheim
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Patent number: 8813377Abstract: A reciprocating cutting tool includes a motion converting mechanism configured to convert rotation of a rotary member into a reciprocating motion of a slider coupled to a rod capable of mounting a blade thereon. The reciprocating cutting tool further includes a slider support mechanism including a first support mechanism and a second support mechanism disposed at different positions along a reciprocating direction of the slider and each supporting the slider such that the slider can move in the reciprocating direction. The first support mechanism includes a first member and a second member disposed on opposite sides of the slider in a holding direction perpendicular to the reciprocating direction and each slidably contacting the slider.Type: GrantFiled: April 11, 2011Date of Patent: August 26, 2014Assignee: Makita CorporationInventors: Toshiyuki Kani, Masanori Hayashi
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Patent number: 8656598Abstract: A handheld jigsaw, such as a compass saw (10), is disclosed that comprises a housing (12, 13) and a lifting rod (20) having a pendulum mechanism (38). The pendulum mechanism includes a pendulum lever (40) with which a pendulum stroke can be given during sawing to a saw blade (28) carried by the lifting rod (20). The lifting rod (20) is arranged such that it can rotate about its own axis (21) thereof and pivot transversely to the axis (21), and wherein the pendulum mechanism (38) can rotate about the axis (21).Type: GrantFiled: April 27, 2009Date of Patent: February 25, 2014Assignee: Robert Bosch GmbHInventors: Hans Kaiser, Marcel Casota, Joachim Platzer, Thilo Koeder, Ulli Hoffmann, Jan Koegel
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Patent number: 8549762Abstract: Preferred embodiments of a reciprocating drive apparatus are disclosed that comprise a housing, a rotatable drive shaft assembly located in the housing an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a tool thereto, a rotary joint rocker mechanism supported in the housing and operatively connected to the plunger and the drive shaft assembly so that rotation of the drive shaft assembly produces reciprocating motion of the plunger. Another preferred embodiment includes a reciprocating counterweight.Type: GrantFiled: April 10, 2009Date of Patent: October 8, 2013Assignee: Robert Bosch GmbHInventor: Stephen C. Oberheim
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Patent number: 8407902Abstract: A reciprocating power tool that includes a drive system having a first driven gear that includes a spindle counterbalance weight and a second driven gear that includes a spindle counterbalance weight. The first driven gear and the second driven gear rotate in opposite directions about an axis of rotation in response to rotation of a driving gear by a motor. The power tool further includes a spindle having a longitudinal axis and a first end that is configured to support a tool element. The spindle is coupled to one of the first driven gear and the second driven gear by a scotch yoke mechanism to reciprocate the spindle with respect to a housing of the power tool along the longitudinal axis of the spindle in response to operation of the motor.Type: GrantFiled: March 10, 2010Date of Patent: April 2, 2013Assignee: Milwaukee Electric Tool CorporationInventors: Michael Naughton, Kurt Limberg, John S. Scott
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Patent number: 8407901Abstract: A drive apparatus for a reciprocating tool includes a plunger and a wobble plate interface operatively connected to a drive shaft assembly. The wobble plate interface includes a lower portion having an effective lower pivot connection, and an upper pivot connection to a rear portion of the plunger. The wobble plate interface is configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes. The distances between the upper and lower pivot connections of both the rocker and wobble plate interface together with the distance between the upper pivot connections thereof to the plunger define a four bar mechanism that produces a path of movement of an attached cutting blade that is effective to apply a progressive non-linear cutting force to a work piece during the cutting stroke.Type: GrantFiled: January 27, 2010Date of Patent: April 2, 2013Assignee: Robert Bosch GmbHInventor: Stephen C. Oberheim
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Publication number: 20130055576Abstract: In one embodiment, a reciprocating tool includes an elongated spindle configured to reciprocate along its lengthwise axis, a wobble drive mechanism operably connected to the elongated spindle, an elongated rocker assembly having an upper end portion operably connected to the spindle, a lower end portion, and a pivot located between said upper and lower end portions, and a counterweight operably connected to the lower end portion, such that as the elongated spindle reciprocates along its lengthwise axis, the counterweight is driven by the elongated rocker assembly to reciprocate along the axis.Type: ApplicationFiled: October 29, 2012Publication date: March 7, 2013Applicants: Robert Bosch GmbH, Robert Bosch Tool CorporationInventors: Robert Bosch Tool Corporation, Robert Bosch GmbH
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Patent number: 8387717Abstract: The present invention provides multi-directional oscillation from a rotational source, by receiving a rotational motion, converting the rotational motion to a first oscillating motion, converting the first oscillating motion to a second oscillating motion that is normal to the first oscillating motion and transferring the first oscillating motion and the second oscillating motion to a working element.Type: GrantFiled: September 30, 2010Date of Patent: March 5, 2013Inventor: Michael Rogler Kildevaeld
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Patent number: 8371032Abstract: A power tool comprises a crank pin that is eccentrically rotatable by a motor about a rotational axis. A non-rotatable first slider is linearly reciprocated by the crank pin so as to linearly reciprocate a tool. An eccentric pin is disposed substantially diametrically opposite of the crank pin relative to the rotational axis and is eccentrically rotatable by the motor about the rotational axis. A non-rotatable second slider is linearly reciprocated by the eccentric pin in a substantially opposite phase from the first slider so that the second slider acts as a counterweight to the first slider in order to reduce vibrations at least in the direction of linear reciprocation. A rotatable component is rotatably driven by the motor about the rotational axis and has a center of gravity displaced from its rotational axis towards the eccentric pin so as to supplement the vibration reducing function of the counterweight.Type: GrantFiled: June 14, 2011Date of Patent: February 12, 2013Assignee: Makita CorporationInventor: Shinji Hirabayashi
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Patent number: 8365644Abstract: There is provided a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw. The blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge. The blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge. The blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge. The upper piercing edge and lower piercing edge intersect to form a forward point on said blade. A mounting aperture is also formed on the blade for releasably securing the blade to the hand held reciprocating power saw.Type: GrantFiled: July 17, 2008Date of Patent: February 5, 2013Inventors: Brian J. Huffer, Emmett J. Ebner
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Patent number: 8307910Abstract: A drive apparatus for a reciprocating tool, including a housing, a rotatable drive shaft assembly located in the housing, an elongated spindle located in the housing for reciprocating motion, a front bushing in the housing for supporting the front end portion of the spindle, and a wobble drive mechanism. The wobble drive mechanism preferably includes a wobble drive shaft connected to the drive shaft assembly and an elongated arm having a lengthwise axis extending upwardly from the wobble drive shaft and including an upper interface for reciprocating the spindle generally in its lengthwise direction during alternating cutting and return strokes. The upper interface connects the arm to the spindle in a manner that prevents translational movement of the spindle relative to the arm in the direction of the arm lengthwise axis, but permits rotational movement thereof in three orthogonal axes.Type: GrantFiled: April 7, 2010Date of Patent: November 13, 2012Assignee: Robert Bosch GmbHInventors: Brad Holmes, Jaime Moreno
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Patent number: 8291603Abstract: The invention relates to a handheld tool, in particular a handheld saw, with an electric drive motor (12), a serially switched gearbox (13), and a movement converter (14) that converts the driven movement of the gearbox (13) into an axial to-and-fro movement of a lifting element (15) for driving a tool (16), in particular a saw blade, inside a housing (11). The gearbox (13) and the movement converter (14) are combined into a gear unit (17). The gear unit (17) is within a robust, bending- and deformation-resistant gear housing (40), which is in turn inside the housing (11). The housing (11) is made of flexible plastic.Type: GrantFiled: July 14, 2010Date of Patent: October 23, 2012Assignee: Robert Bosch GmbHInventors: Daniel Saegesser, Sacha Felder
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Patent number: 8250768Abstract: A handheld power tool having a power tool that executes a reciprocating motion, in particular a reciprocating power saw with a reciprocating sawblade (14), is disclosed. To prevent the power tool from sawing untrue during the cutting operation, in particular between the upper and lower cutting edges, the power tool is assigned at least one force transducer (19), which measures the magnitude of a transverse force, oriented transversely to the direction of motion, that occurs at the power tool, and at least one actuator (21), which acts on the power tool as a function of the measured magnitude of the transverse force, is provided for transverse force compensation (FIG. 2).Type: GrantFiled: April 29, 2008Date of Patent: August 28, 2012Assignee: Robert Bosch GmbHInventors: Hans Kaiser, Stefano Delfini, Thilo Koeder, Martin Affolter, Joachim Platzer
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Publication number: 20120192440Abstract: A power tool includes a housing, a motor supported by the housing and having an output shaft, a planetary transmission coupled to the output shaft and having an output carrier, a dual-eccentric scotch yoke mechanism coupled to the output carrier and drivable by the planetary transmission in response to rotation of the output shaft, and a blade coupled to the dual-eccentric scotch yoke mechanism for movement in a reciprocating manner.Type: ApplicationFiled: January 27, 2011Publication date: August 2, 2012Inventors: Jesse J. Jerabek, Thomas Parel, Ronald C. McCurry, Taku Ohi, Ryan Harrison, Elton L. Watson
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Patent number: 8230608Abstract: A drive apparatus for a reciprocating tool includes a housing, a rotatable drive shaft assembly located in the housing, and an elongated plunger located in the housing for a reciprocating motion. The plunger has a front end portion for attaching a cutting blade thereto. The drive apparatus also includes a rotary joint elongated rocker having a lower end portion with a lower pivot connection to the housing and an upper end with an upper pivot connection to a mid portion of the plunger. A wobble plate interface is operatively connected to the drive shaft assembly, a lower portion having an effective lower pivot connection. The wobble plate interface also has an upper pivot connection to a rear portion of the plunger and configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes.Type: GrantFiled: October 23, 2008Date of Patent: July 31, 2012Assignee: Robert Bosch GmbHInventor: Stephen C. Oberheim
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Patent number: 8201337Abstract: A reciprocating cutting tool configured for orbital cutting, includes a housing, a power source disposed in the housing, a main linkage connected to the power source and to a blade for driving the blade in a vertically reciprocating motion, a foot plate connected to the housing and including a portion in operational relationship to the blade, a swivel bracket connected to the foot plate and disposed to exert an orbital force to a rear edge of the blade. A plunger is secured within the housing and connected to the linkage for reciprocating, pivotal and rotational movement, and has an end configured for receiving a blade. A selector mechanism for selecting at least between pivotal and rotational movement of the plunger, wherein the pivotal movement relates to orbital blade motion, and the rotational movement relates to scrolling blade motion.Type: GrantFiled: January 18, 2007Date of Patent: June 19, 2012Assignee: Robert Bosch GmbHInventors: Ramon Tam, Jaime Moreno, Brian Ellis
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Patent number: 8166660Abstract: A reciprocating saw having a housing, a reciprocating shaft unrotatably connected to a blade, a rear handle and a forward handle, the forward handle being rotatably mounted to the housing near the blade and capable of sliding relative to the reciprocating shaft, but incapable of rotating relative to the reciprocating shaft. The forward handle comprises at least one hole, the reciprocating saw further includes a button connected to a locking element for engaging or disengaging with the at least one hole. The reciprocating saw is easy and comfortable to operate.Type: GrantFiled: March 19, 2009Date of Patent: May 1, 2012Assignee: Chervon LimitedInventor: Hongtao Zhou
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Patent number: 8141444Abstract: A reciprocating shaft assembly in a reciprocating saw moves in a reciprocal motion and drives a saw blade via a blade holder. At least one bore is formed in an end of the reciprocating shaft assembly opposite the blade holder. A pin fixed to the saw passes through the bore and acts as a bearing to support the reciprocating shaft assembly in its reciprocating motion.Type: GrantFiled: October 26, 2007Date of Patent: March 27, 2012Assignee: Black & Decker Inc.Inventors: Michael Anthony Lagaly, Thomas Amold Mooty, James Pierce Nichols, Jr., Earl Roger Clowers, Matthew George Popik
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Publication number: 20120030955Abstract: A machine tool, in particular a keyhole saw, includes a support frame that is twistably supported on the housing and forms the guide for a linear sliding part of the lifting drive unit for the working tool. The linear sliding part is mounted on the lifting rod.Type: ApplicationFiled: November 17, 2009Publication date: February 9, 2012Applicant: Robert Bosch GmbHInventors: Hans Kaiser, Marcel Casota
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Patent number: 8099872Abstract: The invention relates to a guide device (1) for a saw blade (2), in particular for an electric tool, which is operated in reciprocating motion (H) and which comprises a clamping device (4) engaging in the clamping end (3) of the saw blade (2), and a pendulum guide device (5) attached to the back of the saw blade and located at an axial distance (a) from the clamping device (4). According to the invention, the pendulum guide device (5) features at least two guide elements (6) which are arranged at an axial distance from each other. The invention further relates to an electric tool which features said guide device (1). Moreover, the invention relates to an electric tool with said guide device (1), in particular a jigsaw (23).Type: GrantFiled: April 3, 2007Date of Patent: January 24, 2012Assignee: Robert Bosch GmbHInventor: Marcel Casota
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Publication number: 20110314683Abstract: A power tool, particularly in the form of a keyhole saw, is provided with a sensor device that senses the position of the tool, in particular the reciprocating position of the saw blade in at least one of the reversal positions.Type: ApplicationFiled: October 22, 2009Publication date: December 29, 2011Applicant: Robert Bosch GmbHInventors: Thilo Koeder, Joachim Platzer
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Patent number: 8069757Abstract: A cast-cutter for use in removing a cast from a patient comprises a body (20), cutting means (18, 148, 230) supported by the body (20), and a protection member (16, 204, 206, 236, 244) supported by the body (20) and adapted to be positioned between the cutting means (18, 148, 230) and the patient, to protect the skin of the patient. In one disclosed embodiment the cutting means cuts a cast by a shearing action. In another disclosed embodiment the cutting means cuts a cast by an abrading action.Type: GrantFiled: September 19, 2003Date of Patent: December 6, 2011Inventors: David J. Ross, George Miller
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Patent number: 7996996Abstract: The present invention provides a technique for achieving weight reduction of the counter weight while reducing vibration in a reciprocating power tool. A tool bit performs a predetermined operation by reciprocating. A slider reciprocates to drive the tool bit. A motion converting mechanism converts a rotating output of the motor into a reciprocating movement of the slider. A counter weight reciprocates in a direction opposite to the reciprocating direction of the slider to reduce vibration caused by the reciprocating movement of the slider. A component part includes component of motion in a direction parallel to the reciprocating movement of the slider to cooperate with the counter weight in reducing vibration caused within the power tool. Thus, the weight of the counter weight can be decreased.Type: GrantFiled: July 30, 2004Date of Patent: August 16, 2011Assignee: Makita CorporationInventor: Shinji Hirabayashi
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Publication number: 20110146087Abstract: An electric hand power tool with oscillating working movement, particularly translation movement, is made particularly compact and with low volume by an elastomeric module. According to the invention, the elastomeric module extends and/or contracts when electric voltage is applied. The module, being used as drive, being can be coupled mechanically to a tool and electrically to a voltage source.Type: ApplicationFiled: July 7, 2009Publication date: June 23, 2011Inventors: Martin Sinner-Hettenbach, Tobias Lutz
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Patent number: 7937841Abstract: An electric saw (2) includes a stroke arrangement (4) driven in a reciprocating manner and having a tool receptacle (8) for a saw blade (10), a housing (14) which extends along a stroke axis (A) of the stroke arrangement (4) and which forms at a working tool-side end (12) a housing opening (16) from which the stroke arrangement (4) projects, and which forms a receiving space (26) in which is arranged a motion transforming device (24), the stroke arrangement (4) being supported at the housing (14) by a bearing element (30) which forms a sliding bearing (28) and is arranged between the motion transforming device (24) and the housing opening (16), with an air flow (L) being directed toward the housing opening (16) so that particles (P) can be prevented from entering the sliding bearing (28), with the bearing element (30) limiting the receiving space (26) toward the housing opening (16), and with a flow path (46) by which the air flow (L) is guided being provided at an outer side (40) of the bearing element (30)Type: GrantFiled: April 8, 2008Date of Patent: May 10, 2011Assignee: Hilti AktiengesellschaftInventor: Oliver Ohlendorf
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Patent number: 7818887Abstract: The invention relates to a handheld tool, in particular a handheld saw, with an electric drive motor (12), a serially switched gearbox (13), and a movement converter (14) that converts the driven movement of the gearbox (13) into an axial to-and-fro movement of a lifting element (15) for driving a tool (16), in particular a saw blade, inside a housing (11). The gearbox (13) and the movement converter (14) are combined into a gear unit (17). The gear unit (17) is within a robust, bending- and deformation-resistant gear housing (40), which is in turn inside the housing (11). The housing (11) is made of flexible plastic.Type: GrantFiled: May 8, 2007Date of Patent: October 26, 2010Assignee: Robert Bosch GmbHInventors: Daniel Saegesser, Sacha Felder
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Patent number: 7814666Abstract: Preferred embodiments of a reciprocating drive apparatus are disclosed that comprise a housing, a rotatable drive shaft assembly located in the housing an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a tool thereto, a rotary joint rocker mechanism supported in the housing and operatively connected to the plunger and the drive shaft assembly so that rotation of the drive shaft assembly produces reciprocating motion of the plunger. Another preferred embodiment includes a reciprocating counterweight.Type: GrantFiled: February 13, 2007Date of Patent: October 19, 2010Assignee: Robert Bosch GmbHInventor: Stephen C. Oberheim
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Publication number: 20100101101Abstract: Embodiments are disclosed of a drive apparatus for a reciprocating tool, that comprises a housing, a rotatable drive shaft assembly located in the housing, an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a cutting blade thereto, a rotary joint elongated rocker having a lower end portion with a lower pivot connection to the housing and an upper end with an upper pivot connection to a mid portion of the plunger, a wobble plate interface operatively connected to the drive shaft assembly, a lower portion having an effective lower pivot connection, the interface also having an upper pivot connection to a rear portion of the plunger and configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes, the distances between the upper and lower pivot connections of both the rocker and wobble plate interface together with the distance between the upper pivot connections thereof to the pluType: ApplicationFiled: October 23, 2008Publication date: April 29, 2010Applicants: CREDO TECHNOLOGY CORPORATION, ROBERT BOSCH GMBHInventor: Stephen C. Oberheim
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Patent number: 7637018Abstract: A power tool includes a housing, a rotary motor disposed in the housing, a jack shaft coupled to the motor and a spindle mounted in the housing for carrying a tool. A first wobble plate assembly is coupled to the jack shaft for driving the spindle to reciprocate at least approximately linearly in a linear path along a predetermined axis. A counterweight is mounted in the housing for performing a rotative reciprocating motion and pivoting relative to the housing about a pivot axis. The pivot axis is disposed in a plane perpendicular to the predetermined axis and fixed relative to the housing. A second wobble plate assembly is coupled to the jack shaft for driving the counterweight. The use of the counterweight results in no friction or restriction with a large stroke and large area, so that stability is improved, fitting of the counterweight is simple and cost is reduced.Type: GrantFiled: October 2, 2006Date of Patent: December 29, 2009Assignee: Positec Power Tools (Suzhou) Co. Ltd.Inventor: Shisong Zhang
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Patent number: 7596873Abstract: In a hand-guided, motor-driven compass saw machine (1), having a housing (2) that contains a saw blade (3) that can be moved in the vertical direction by a lifter rod (4), and having an oscillation mechanism that has a roller lever (5), which is contained in the housing so that it can rotate around a horizontal first axis (50) and supports a roller (51) that remains in contact with the saw blade (3) and rotates around a horizontal second axis (55), which oscillation mechanism also has a fork lever (6) that periodically deflects the roller lever (5), an adaptive adjustment of the forward saw progress to the advancing force of the compass saw machine (1) is achieved by virtue of the fact that the oscillation mechanism produces an oscillation of the saw blade (3) as a function of the pressure.Type: GrantFiled: April 30, 2004Date of Patent: October 6, 2009Assignee: Robert Bosch GmbHInventor: Aldo Di Nicolantonio
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Publication number: 20090241354Abstract: A reciprocating saw having a housing, a reciprocating shaft unrotatably connected to a blade, a rear handle and a forward handle, the forward handle being rotatably mounted to the housing near the blade and capable of sliding relative to the reciprocating shaft, but incapable of rotating relative to the reciprocating shaft. The forward handle comprises at least one hole, the reciprocating saw further includes a button connected to a locking element for engaging or disengaging with the at least one hole. The reciprocating saw is easy and comfortable to operate.Type: ApplicationFiled: March 19, 2009Publication date: October 1, 2009Inventor: Hongtao Zhou
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Patent number: 7526868Abstract: It is an object of the invention to provide a useful technique for reducing vibration of a handgrip and improving the cutting efficiency while achieving weight reduction of a reciprocating power tool. According to the invention, a representative reciprocating power tool is provided to comprise a body, a tool bit, an actuating mechanism, a handgrip. The handgrip and the body can rotate with respect to each other via a pivot in a direction crossing the direction of reciprocating linear motion of the tool bit. An elastic element is disposed between the handgrip and the body and serves to absorb vibration transmitted from the body to the handgrip by elastically receiving the relative rotation of the handgrip and the body. According to the invention, vibration in the handgrip can be reduced and the cutting efficiency can be improved without complicating the construction.Type: GrantFiled: November 30, 2005Date of Patent: May 5, 2009Assignee: Makita CorporationInventors: Sadaharu Oki, Shinji Hirabayashi, Kenji Kobayashi
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Patent number: 7509744Abstract: A mode selection apparatus for a jigsaw having scrolling and orbital modes is disclosed. The mode selection apparatus comprises a locking arm (76) moveable between a first position in which a scroller knob (56) is rotatable relative to the tool housing, a second position in which the locking arm engages the scroller knob to prevent it from rotating relative to the tool housing and an output shaft of the jigsaw is prevented from pivoting about a pivot axis transverse to the longitudinal axis of the output shaft, and a third position in which the scroller knob is prevented from rotating relative to the tool housing and the output shaft is causes to pivot about the pivot axis. The locking arm (76) has a slot (84) for engaging a tooth (86) on a scroll selector (48) for moving the locking arm between the first, second and third positions thereof. The tooth (86) remains in engagement with the slot (84) during movement of the locking arm between the first, second and third positions.Type: GrantFiled: August 13, 2007Date of Patent: March 31, 2009Assignee: Black & Decker Inc.Inventor: Andrew Walker
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Publication number: 20090077820Abstract: A jigsaw generally includes a housing containing a motor activated by a trigger assembly. A single control member is connected to the housing and configured to be accessible by a user. A reciprocating shaft moves at a reciprocation speed and at a magnitude of orbital motion when the trigger assembly is in a retracted condition. The single control member is operable to be positioned among a plurality of positions. Each of the positions corresponds to a predetermined combination of values of the reciprocation speed and the magnitude of the orbital motion.Type: ApplicationFiled: September 21, 2007Publication date: March 26, 2009Applicant: BLACK & DECKER INC.Inventors: Louis A. Gibbons, Michael F. Cannaliato, Terry L. Turner, Ruth M. Keffer, Weston J. Van Wambeke, John S. Vantran, Brent A. Kuehne
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Publication number: 20090077817Abstract: A jigsaw generally includes a housing that contains a motor activated by a trigger assembly. A reciprocating shaft is connected to the motor that extends from the housing toward a cutting area. A laser module is contained with a housing operable to produce a laser light pattern forward of the cutting area. An upper connection portion releaseably connects the housing of the laser module to the housing of the jigsaw. A lower connection portion pivotally couples the housing of the laser module to the housing of the jigsaw to permit the housing of the laser module to tilt away from the housing of the jigsaw to provide access to a rear area of the laser module.Type: ApplicationFiled: September 21, 2007Publication date: March 26, 2009Applicant: BLACK & DECKER INC.Inventors: Louis A. Gibbons, Timothy McKay, Michael F. Cannaliato, John S. Vantran
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Patent number: 7451546Abstract: A hand-held jigsaw machine includes a machine housing (11), a saw blade (13) that is drivable in a reciprocating manner by a motor, a support device (20) with a support roller (23) that supports the saw blade on its back (132), and a holder (22) that is fixed to the machine housing (11) and accommodates the support roller (23) between two arms (222, 223), and a guide device (21) for guiding and supporting the saw blade (13) transversely to the saw direction with guide elements (24, 25) on opposite sides of the saw blade (13) at an adjustable distance from each other. To ensure economical production of the support and guide device and to reduce the number of components required, the guide device (21) is integrated in the holder (22) of the support device (20).Type: GrantFiled: July 7, 2005Date of Patent: November 18, 2008Assignee: Robert Bosch GmbHInventors: Stefano Delfini, Daniel Saegesser, Thomas Ruoff