Patents by Inventor Walter Wissmach
Walter Wissmach has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11123854Abstract: A handheld power tool has a tool socket (2) to hold a tool (4) along a working axis (11), a motor (5) and a slip clutch (21) having a number of blocking elements. A sensor (27) serves to record a measured signal (28) as the measure of vibrations inside the handheld power tool (1). A band-pass filter (29) has a pass range in which a frequency lies that is equal to the product of the rotational speed of the wheel (22) on the drive side and the number N of blocking elements (24). The measured signal (28) filtered by the band-pass filter (29) is fed to an evaluation unit (30). When the filtered measured signal (28) exceeds a limit value, the evaluation unit (30) reduces the rotational speed of the motor (5).Type: GrantFiled: July 19, 2019Date of Patent: September 21, 2021Assignee: Hilti AktiengesellschaftInventors: Erwin Manschitz, Walter Wissmach
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Patent number: 10751866Abstract: A handheld power tool has a tool socket (2) to hold a tool (4) along a working axis (11), a motor (5) and a slip clutch (21) having a number of blocking elements. A sensor (27) serves to record a measured signal (28) as the measure of vibrations inside the handheld power tool (1). A band-pass filter (29) has a pass range in which a frequency lies that is equal to the product of the rotational speed of the wheel (22) on the drive side and the number N of blocking elements (24). The measured signal (28) filtered by the band-pass filter (29) is fed to an evaluation unit (30). When the filtered measured signal (28) exceeds a limit value, the evaluation unit (30) reduces the rotational speed of the motor (5).Type: GrantFiled: June 25, 2015Date of Patent: August 25, 2020Assignee: Hilti AkitengesellschaftInventors: Erwin Manschitz, Walter Wissmach
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Publication number: 20190337137Abstract: A handheld power tool has a tool socket (2) to hold a tool (4) along a working axis (11), a motor (5) and a slip clutch (21) having a number of blocking elements. A sensor (27) serves to record a measured signal (28) as the measure of vibrations inside the handheld power tool (1). A band-pass filter (29) has a pass range in which a frequency lies that is equal to the product of the rotational speed of the wheel (22) on the drive side and the number N of blocking elements (24). The measured signal (28) filtered by the band-pass filter (29) is fed to an evaluation unit (30). When the filtered measured signal (28) exceeds a limit value, the evaluation unit (30) reduces the rotational speed of the motor (5).Type: ApplicationFiled: July 19, 2019Publication date: November 7, 2019Inventors: Erwin Manschitz, Walter Wissmach
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Publication number: 20170129089Abstract: A handheld power tool has a tool socket (2) to hold a tool (4) along a working axis (11), a motor (5) and a slip clutch (21) having a number of blocking elements. A sensor (27) serves to record a measured signal (28) as the measure of vibrations inside the handheld power tool (1). A band-pass filter (29) has a pass range in which a frequency lies that is equal to the product of the rotational speed of the wheel (22) on the drive side and the number N of blocking elements (24). The measured signal (28) filtered by the band-pass filter (29) is fed to an evaluation unit (30). When the filtered measured signal (28) exceeds a limit value, the evaluation unit (30) reduces the rotational speed of the motor (5).Type: ApplicationFiled: June 25, 2015Publication date: May 11, 2017Inventors: Erwin Manschitz, Walter Wissmach
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Patent number: 7048076Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).Type: GrantFiled: December 18, 2003Date of Patent: May 23, 2006Assignee: Hilti AktiengesellschaftInventors: Holger Cecchin, Christian Daubner, Hubert Daxenberger, David Hruza, Christoph Kink, Ferdinand Kristen, Erwin Manschitz, Hans-Juergen Pfisterer, Walter Wissmach
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Patent number: 6983807Abstract: An electrical, rotary-percussion hand-held includes a spindle (4), an electric motor for driving the spindle at different rotational speeds corresponding to different operational modes, a percussion mechanism and a gear mechanism arranged between the electric motor (1) and the spindle (4) for transmitting a drive torque from the electric motor (1) to the spindle (4), and a rotation shifting device (7) operatively connected with signal elements (6, 6?) and electrically connected with the electric motor (1) for driving the spindle (4) with a rotational speed corresponding to a selected operational mode.Type: GrantFiled: August 29, 2003Date of Patent: January 10, 2006Assignee: Hilti AktiengesellschaftInventors: Martin Mayr, Wolfgang Zwerenz, Walter Wissmach, Christoph Kink
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Patent number: 6866105Abstract: An electrical tool includes a housing having inlet (7) and outlet (8) openings, a brushless electric motor (2) and an inverted rectifier (3) both arranged in the housing (9) between inlet (7) and outlet (8) openings in an air stream (5) of an air volume (6), and a link condensator (10) located in the housing (9) in the air stream (5), with the inverted rectifier (3) being arranged, in the air flow direction, downstream of the link condensator (10) and upstream of the electric motor (2).Type: GrantFiled: September 11, 2003Date of Patent: March 15, 2005Assignee: Hilti AktiengesellschaftInventors: Hans-Jürgen Pfisterer, Holger Cecchin, Walter Wissmach, Christoph Kink, Ferdinand Kristen, Rudolf Bauer, Erwin Manschitz
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Publication number: 20040182589Abstract: An electrical hand-held tool includes an electric motor (2) having a rotor shaft (3) extending transverse to the tool percussion axis (A), a rotor sheet stack (4) supported on the rotor shaft, and a pinion (5) supported on the rotor shaft, a percussion mechanism (6) including an eccentric (7), and a drive gear (8) engageable with the motor pinion (5) for driving the eccentric (7), with the rotor sheet stack (4) being arranged, with respect to the percussion axis A, completely diametrically opposite the drive gear (8).Type: ApplicationFiled: December 18, 2003Publication date: September 23, 2004Inventors: Holger Cecchin, Christian Daubner, Hubert Daxenberger, David Hruza, Christoph Kink, Ferdinand Kristen, Erwin Manschitz, Hans-Juergen Pfisterer, Walter Wissmach
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Publication number: 20040124721Abstract: An electrical tool includes a housing having inlet (7) and outlet (8) openings, a brushless electric motor (2) and an inverted rectifier (3) both arranged in the housing (9) between inlet (7) and outlet (8) openings in an air stream (5) of an air volume (6), and a link condensator (10) located in the housing (9) in the air stream (5), with the inverted rectifier (3) being arranged, in the air flow direction, downstream of the link condensator (10) and upstream of the electric motor (2).Type: ApplicationFiled: September 11, 2003Publication date: July 1, 2004Inventors: Hans-Jurgen Horst Georg Pfisterer, Holger Cecchin, Walter Wissmach, Christoph Josef Kink, Ferdinand Kristen, Rudolf Bauer, Erwin Manschitz
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Publication number: 20040112615Abstract: An electrical, rotary-percussion hand-held including a spindle (4), an electric motor for driving the spindle between alternatingly switchable mode, a percussion mechanism and a gear mechanism arranged between the electric motor (1) and the spindle (4) for transmitting a drive torque from the electric motor (1) to the spindle (4), and a rotation shifting device (7) operatively connected with signal elements (6, 6′) and electrically connected with the electric motor (1) for actively shifting rotation of the spindle (4).Type: ApplicationFiled: August 29, 2003Publication date: June 17, 2004Inventors: Martin Mayr, Wolfgang Zwerenz, Walter Wissmach, Christoph Kink
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Patent number: 6741050Abstract: A control method and a switching circuit for braking an electronically commutated electrical motor, wherein operation is in a phase period (T) of an inverter relative to at lest one winding, sequentially, both in a motoring mode and a generating operating mode using various cycles (t1-t2, t3-t4) beginning with zero, such that the driving and braking torques associated with the cycles (t1-t2, t3-t4) produce a resultant braking moment averaged over the phase period (T).Type: GrantFiled: July 16, 2002Date of Patent: May 25, 2004Assignee: Hilti AktiengesellschaftInventors: Walter Wissmach, Rudolf Bauer, Vilmos Török
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Publication number: 20030052632Abstract: A control method and a switching circuit for braking an electronically commutated electrical motor, wherein operation is in a phase period (T) of an inverter relative to at lest one winding, sequentially, both in a motoring mode and a generating operating mode using various cycles (t1-t2, t3-t4) beginning with zero, such that the driving and braking torques associated with the cycles (t1-t2, t3-t4) produce a resultant braking moment averaged over the phase period (T).Type: ApplicationFiled: July 16, 2002Publication date: March 20, 2003Inventors: Walter Wissmach, Rudolf Bauer, Vilmos Torok
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Patent number: 6520270Abstract: A depth assembly for use with a hand-held power tool (2) and including a motorized control unit for adjusting a position of a depth-setting member (3) and connectable with an energy source (4) which supplies power thereto, and a micro-controller (6) for controlling the operation of the control unit (5) and connected with a length-determining sensor.Type: GrantFiled: May 25, 2001Date of Patent: February 18, 2003Assignee: Hilti AktiengesellschaftInventors: Walter Wissmach, Ferdinand Kristen, Hans-Werner Bongers-Ambrosius
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Patent number: 6512318Abstract: A self-starting brushless electric motor having a first motor (stator) with poles arranged in a row, said poles constituting ferromagnetic poles or permanent-magnet poles, a second motor part (rotor) with poles arranged in a row, said poles consisting of ferromagnetic poles or permanent-magnet poles and being arranged opposite the row of poles on the first motor part, wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts are movable in relation to each other.Type: GrantFiled: January 3, 2001Date of Patent: January 28, 2003Inventors: Vilmos Török, Walter Wissmach, Roland Schaer
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Publication number: 20020047447Abstract: A self-starting brushless electric motor having a first motor (stator) with poles arranged in a row, said poles constituting ferromagnetic poles or permanent-magnet poles, a second motor part (rotor) with poles arranged in a row, said poles consisting of ferromagnetic poles or permanent-magnet poles and being arranged opposite the row of poles on the first motor part, wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts are movable in relation to each other.Type: ApplicationFiled: January 3, 2001Publication date: April 25, 2002Inventors: Vilmos Torok, Walter Wissmach, Roland Schaer
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Publication number: 20020037785Abstract: A controllable planetary gear for transmitting a rotational movement between an input (2) and an output (3), including a ring gear (4) with which a speed range of the transmitted rotational movement is controlled; and a control device (6, 61) having an inner member (5, 51) in which the ring gear (4) is integrated, an outer member (7, 71) supportable in the tool housing (3) without a possibility of rotation relative thereto, and a sensor (8, 81) for measuring a force acting on the outer member (7, 71) and a tension developed in the outer member (7, 71).Type: ApplicationFiled: September 24, 2001Publication date: March 28, 2002Inventors: Walter Wissmach, Ferdinand Kristen, Edwin Schweizer, Michael Mergenbaum
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Publication number: 20010052418Abstract: A depth assembly for use wit a hand-held power tool (2) comprising a rod-shaped, deflection-resistant, depth-setting member (3) supported for a limited movement parallel to an axis of the power tool; a motorized control unit (5) associated with the depth-setting member (3) and connectable with an energy source (4); a length-determining sensor (10) associated with the depth-setting member (3); a transceiver unit (7) for contactless reading of an identification of a fastening element (9) insertable in the blind bore formed with the hand held power tool, and a micro-controller (6) for controlling the operation of the control module (5) and connected with the transceiver unit and the sensor.Type: ApplicationFiled: May 25, 2001Publication date: December 20, 2001Inventors: Walter Wissmach, Ferdinand Kristen, Hans-Werner Bongers Ambrosius
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Publication number: 20010052416Abstract: An electrical device for driving a tool (1), is secured in a tool chuck (2) and contains data (6) characterizing the tool (1). The tool is driven by an electrical driving mechanism (10), and is equipped in the chucking region (4) with a transponder (5), which contains READ and/or WRITE data (6). The electrical device (3) contains a transmitting and receiving unit (7), connected with a microcontroller (8), which in turn is connected with the electrical driving mechanism (10).Type: ApplicationFiled: May 29, 2001Publication date: December 20, 2001Inventors: Walter Wissmach, Ferdinand Kristen, Hans-Werner Bongers-Ambrosius
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Patent number: 6204587Abstract: A self-starting brushless electric motor having a first motor part (stator) (11) with poles arranged in a row, the poles constituting ferromagnetic poles (13S) or permanent-magnet poles (14A), a second motor part (rotor) (12) with poles arranged in a row, the poles having ferromagnetic poles (16A) or permanent-magnet poles and being arranged opposite the row of poles on the first motor part (11), wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts (11, 12) are movable in relation to each other.Type: GrantFiled: November 26, 1997Date of Patent: March 20, 2001Inventors: Vilmos Török, Walter Wissmach, Roland Schaer
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Patent number: 6154090Abstract: A method of reducing feedback action on a timely flow of current, which is drawn by a load from a network via rectifier, by active filtering of upper harmonics, which are superimposed on a network first harmonic, with a power factor corrector circuit with a pulse-width modulation of a switch signal which influences the current drawn from the network and flowing through a boost-converter, with the method including dividing a current path between the rectifier (2) and the load (10) in a plurality of parallel channels (It, Jt), and providing in each channel (It, Jt) a similarly active filter, with switch signals of both active filters having a substantially same pulse-width modulation and being phase-sifted relative to each other so that a reduced ripple of the total current, which results form cumulative superimposition of currents in separate channels, is produced at a network input (9); and an active filter for effecting the method.Type: GrantFiled: April 14, 1999Date of Patent: November 28, 2000Assignee: Hilti AktiengesellschaftInventors: Walter Wissmach, Rudolf Bauer