Patents by Inventor Thomas Sperrfechter

Thomas Sperrfechter 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).

  • Patent number: 11813726
    Abstract: A setting tool for driving fastening elements into a substrate is provided, the setting tool comprising a holder, which is provided for holding a fastening element, a drive-in element, which is provided for transferring a fastening element held in the holder into the substrate along a setting axis, a drive, which is provided for driving the drive-in element toward the fastening element along the setting axis, wherein the drive comprises an electrical capacitor, which is arranged on the setting axis or around the setting axis.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: November 14, 2023
    Assignee: Hilti Aktiengesellschaft
    Inventors: Tilo Dittrich, Chafic Abu Antoun, Thomas Sperrfechter
  • Patent number: 11712792
    Abstract: A setting tool for driving fastening elements into a substrate, comprising a holder for holding a fastening element; a drive-in element for transferring a fastening element held in the holder into the substrate along a setting axis; and a drive for driving the drive-in element toward the fastening element along the setting axis, wherein the drive comprises an electrical capacitor; a squirrel-cage rotor arranged on the drive-in element; and an excitation coil; which during discharge of the capacitor is flowed through by current and generates a magnetic field that accelerates the drive-in element toward the fastening element, wherein the setting tool further comprises a soft-magnetic frame, in which the excitation coil is embedded; and a supporting structure; wherein, at least during the discharge of the capacitor, the supporting structure exerts on the soft-magnetic frame a pretensioning force directed radially inward with respect to the setting axis.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: August 1, 2023
    Assignee: Hilti Aktiengesellschaft
    Inventors: Tilo Dittrich, Thomas Sperrfechter, Norbert Heeb
  • Patent number: 10639777
    Abstract: The invention relates to a drive-in device, comprising a drive-in piston, guided in a cylinder, for driving a nail member into a workpiece, and a combustion chamber arranged above the drive-in piston, said combustion chamber being Tillable with a combustion gas, wherein the combustion chamber has a bottom that is adjustable along an axis, wherein the bottom has a groove that extends in the circumferential direction and has an inserted seal which bears in a radial direction against a rigid combustion-chamber wall, wherein a front surface, in the axial direction, of the seal protrudes in the direction of the axis from a terminating plane of the groove.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 5, 2020
    Assignee: HILTI AKTIENGESELLSCHAFT
    Inventors: Peter Stauss-Reiner, Norbert Heeb, Thomas Sperrfechter, Markus Woerner, Tilo Dittrich
  • Publication number: 20130270320
    Abstract: The invention relates to a driving tool comprising a tank for storing a fuel, a combustion chamber connected to the tank, a movable piston for driving a driving ram, and a ventilator that acts on the combustion chamber and rotates around an axis, with several blades extending radially to the axis, wherein at least one of the blades has a section of at least one third of a radial length of the blade, whose width projected in the axial direction does not increase radially toward the outside, and/or at least one of the blades has a section of at least one third of a radial length of the blade, whose angle of inclination (A, B) around a blade axis increases from the outside toward the inside.
    Type: Application
    Filed: April 11, 2013
    Publication date: October 17, 2013
    Inventors: Thomas Sperrfechter, Peter Bruggmueller
  • Publication number: 20120144827
    Abstract: The invention concerns a fastener-driving apparatus comprising a tank (8) for storage of a fuel, in particular a liquefied gas, a combustion chamber (4, 5) connected to the tank (8) via a valve element (9), where the combustion chamber (4, 5) has a movable piston (3) to advance a driving ram (2), and an ignition device for ignition of an air-fuel mixture in the combustion chamber, where an injection line (10, 11, 12) is provided between the tank (8) and the combustion chamber (4, 5), where the injection line (10, 11, 12) has optimization with regard to an expansion and/or transport time.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 14, 2012
    Applicant: Hilti Aktiengesellschaft
    Inventors: Iwan WOLF, Dierk Tille, Thomas Sperrfechter
  • Publication number: 20120132689
    Abstract: The invention relates to a fastener driving tool comprising a tank (5) for storing a fuel, in particular liquefied petroleum gas, a combustion chamber (2) connected to the tank (5), wherein the combustion chamber (2) has a movable piston for powering a driving plunger, and a metering device (4) arranged between the tank (5) and the combustion chamber (2) wherein a defined quantity of fuel can be transported by means of the metering device (4) from a metering space (12) into the combustion chamber (2), and wherein the metering device (4) comprises a movable displacement member (16) for ejecting the fuel out of the metering space (12), wherein the movement of the displacement member (16) is supplied by the pressure of the fuel as the energy source.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 31, 2012
    Applicant: HILTI AKTIENGESELLSCHAFT
    Inventors: Tilo Dittrich, Thomas Sperrfechter, Heeb Norbert, Peter Stauss
  • Patent number: 7967177
    Abstract: A combustion-operated setting tool (10) for driving in fastening elements, includes a combustion chamber (15), a ventilator (16), and a motor (17) for driving the ventilator (16). The motor (17) is mounted in a receptacle (20) of a motor-supporting member (21) and is supported at least at one of its axial ends (24, 25) by an annular damping element (30) at a wall portion (22, 23) defining the receptacle (20), with an annular recess (33) arranged at the circumference of the annular damping element (30).
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: June 28, 2011
    Assignee: Hilti Aktiengesellschaft
    Inventors: Thomas Sperrfechter, Tilo Dittrich, Riccardo Morel
  • Publication number: 20090159635
    Abstract: A combustion-operated setting tool (10) for driving in fastening elements, includes a combustion chamber (15), a ventilator (16), and a motor (17) for driving the ventilator (16). The motor (17) is mounted in a receptacle (20) of a motor-supporting member (21) and is supported at least at one of its axial ends (24, 25) by an annular damping element (30) at a wall portion (22, 23) defining the receptacle (20), with an annular recess (33) arranged at the circumference of the annular damping element (30).
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Inventors: Thomas Sperrfechter, Tilo Dittrich, Riccardo Morel
  • Patent number: 7407071
    Abstract: A setting tool for driving fastening elements in a constructional component includes piston stop device for braking the setting piston, and is located at an end region of the hollow chamber of the piston guide in which the setting piston is displaceable, and has a damping element supported against a bottom, a stop element for the setting piston and adjoining the damping element in a direction of the hollow chamber, and an inertia body cooperating with the stop element and displaceable in a direction parallel to a longitudinal extent of the setting piston between first and second stops both of which are connected with the stop element and a distance between which, in a direction parallel to the longitudinal extent of the setting piston, is greater than a length of the inertia body in a same direction by length of a decoupling path.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: August 5, 2008
    Assignee: Hilti Aktiengesellschaft
    Inventors: Thomas Sperrfechter, Wolfram Hahn
  • Patent number: 7308997
    Abstract: A combustion-operated setting tool for driving fastening elements in a constructional component includes a device (30) for adjusting setting energy applied to a setting piston (15) axially displaceable in a guide space (4) of a piston guide (13). The adjusting device (30) has a separation member (31) adjustably arranged between the receptacle (18) and the guide space (14) of the piston guide (13) and dividing the combustion chamber (20) in a first sub-chamber (21) arranged between the receptacle (18) and the separation member (31) and a second sub-chamber (22) arranged between the separation member (31) and the guide space (14) of the piston guide (13), the separation member (31) having a plurality of through-openings (34, 35) for controlling flow of the combustion gases into the guide space (14) of the piston guide (13), with an active opening cross-section of at least a portion of the through-openings (34, 35) changing dependent on an adjustable position of the separation member (31).
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: December 18, 2007
    Assignee: Hilti Aktiengesellschaft
    Inventors: Jens Neumann, Norbert Heeb, Tilo Dittrich, Thomas Sperrfechter
  • Publication number: 20070045375
    Abstract: A setting tool for driving fastening elements in a constructional component includes piston stop device (30) for braking the setting piston (20) and which is located at an end region of the hollow chamber (14) of the piston guide (13) in which the setting piston is displaceable, adjacent to the bolt guide (12), and has a damping element (31) supported against a bottom (15), a stop element (32) for the setting piston (20) and adjoining the damping element (31) in a direction of the hollow chamber (14), and an inertia body (33) cooperating with the stop element (32) and displaceable in a direction parallel to a longitudinal extent of the setting piston (20) between a first stop (35) and a second stop (36) both of which are connected with the stop element (32) and a distance between which, in a direction parallel to the longitudinal extent of the setting piston (20), is greater than a length of the inertia body (33) in a same direction by length of a decoupling path (38).
    Type: Application
    Filed: August 23, 2006
    Publication date: March 1, 2007
    Inventors: Thomas Sperrfechter, Wolfram Hahn
  • Publication number: 20070000458
    Abstract: A combustion-operated setting tool for driving fastening elements in a constructional component includes a device (30) for adjusting setting energy applied to a setting piston (15) axially displaceable in a guide space (4) of a piston guide (13). The adjusting device (30) has a separation member (31) adjustably arranged between the receptacle (18) and the guide space (14) of the piston guide (13) and dividing the combustion chamber (20) in a first sub-chamber (21) arranged between the receptacle (18) and the separation member (31) and a second sub-chamber (22) arranged between the separation member (31) and the guide space (14) of the piston guide (13), the separation member (31) having a plurality of through-openings (34, 35) for controlling flow of the combustion gases into the guide space (14) of the piston guide (13), with an active opening cross-section of at least a portion of the through-openings (34, 35) changing dependent on an adjustable position of the separation member (31).
    Type: Application
    Filed: April 14, 2006
    Publication date: January 4, 2007
    Inventors: Jens Neumann, Norbert Heeb, Tilo Dittrich, Thomas Sperrfechter
  • Patent number: 7086574
    Abstract: An explosion-operated power tool including a housing (1) having a cylindrical cavity (5) and a piston chamber (2) for receiving a drive piston (3) and communicating with the cavity (5), a breech bottom (8) located opposite the cavity (5) and fixedly secured at a predetermined distance from the housing (1), and a sealing sleeve (12) located in the cavity (5) of the housing (1) and displaceable axially away from the breech bottom (8) and toward the breech bottom (8) for enabling, respectively, a sidewise feeding of a catridge (10) for positioning the catridge between the breech bottom and the sealing sleeve (12) and for securing the catridge between the breech bottom (8) and the sealing sleeve (12).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: August 8, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Tilo Dittrich, Gerhard Ehmig, Thomas Sperrfechter
  • Patent number: 7028877
    Abstract: A combustion-operated working tool having a housing body (1), which has a cylindrical recess (5) and a piston chamber (2) connecting therewith for receiving a piston (3); an impact plate (8), which is arranged opposite to and at a distance to the cylindrical recess (5) and which can be displaced towards and away from the housing body (1), and a packing sleeve (12) arranged inside and elastically mounted, projecting out of the cylindrical recess (5).
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Thomas Sperrfechter, Jens Neumann, Norbert Heeb, Gerhard Ehmig, Tilo Dittrich
  • Patent number: 6983679
    Abstract: A propellant magazine for a propellant-operated setting tool and including a pocket foil (1, 11, 21) having a plurality of recessed, spaced from each other, pockets (2, 12, 22, 42) for receiving each a propellant (3, 13, 23), a cover foil (5, 15, 25) unreleasably connected with the pocket foil (1, 11, 21) for closing the pockets (2, 12, 22), and an electrically conducting strip (7, 17, 27, 37) associated with each pocket (2, 12, 22, 42) and having at least one contact point (8, 9, 18, 19, 28, 29, 31, 32, 38, 39).
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: January 10, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Tilo Dittrich, Mario Grazioli, Thomas Sperrfechter, Mario Scalet, Gerhard Ehmig
  • Patent number: 6978919
    Abstract: A piston holder for a drive piston (8) of a setting tool and having a circumferential adjusting surface (16) inclined toward a central axis (17) thereof so that a diameter of the adjusting surface (16) increase toward a rear, with respect to a setting direction (18) of the setting tool, end of the drive piston (8), with the piston holder including contact elements (22; 24; 36; 38; 40; 41, 52; 53; 58–61) engageable with the adjusting surface (16), and a spring (21; 27; 35; 36; 54; 55; 62) for biasing the contact elements into engagement with the adjusting surface (16).
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: December 27, 2005
    Assignee: Hilti Aktiengesellschaft
    Inventors: Stefan Bönig, Franz Büchel, Markus Frommelt, Thomas Sperrfechter, Norbert Heeb, Jens Neumann
  • Patent number: 6880738
    Abstract: The present invention relates to a propellant charge magazine for setting tools and a setting tool for driving fasteners into a substrate. The propellant charge magazine of the invention comprises a housing (24) with an internal housing space for receiving a magazine strip with propellant charges (22). At least one output opening (26) for inserting and extracting the magazine strip (21) is arranged on the housing. A first space (27) for receiving a rolled up magazine strip (21) is provided on the propellant charge magazine (20) and a second space (28) in contact with the first space (27) via an opening (29) and for accommodating part (31) of the magazine strip (21) that is re-introduced into the propellant charge magazine (20) is provided on the propellant charge magazine (20).
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: April 19, 2005
    Assignee: Hilti Aktiengesellschaft
    Inventors: Jens Neumann, Tilo Dittrich, Thomas Sperrfechter, Norbert Heeb, Mario Scalet
  • Publication number: 20040226975
    Abstract: A combustion-operated working tool having a housing body (1), which has a cylindrical recess (5) and a piston chamber (2) connecting therewith for receiving a piston (3); an impact plate (8), which is arranged opposite to and at a distance to the cylindrical recess (5) and which can be displaced towards and away from the housing body (1), and a packing sleeve (12) arranged inside and elastically mounted, projecting out of the cylindrical recess (5).
    Type: Application
    Filed: December 18, 2003
    Publication date: November 18, 2004
    Inventors: Thomas Sperrfechter, Jens Neumann, Norbert Heeb, Gerhard Ehmig, Tilo Dittrich
  • Publication number: 20040178247
    Abstract: An explosion-operated power tool including a housing (1) having a cylindrical cavity (5) and a piston chamber (2) for receiving a drive piston (3) and communicating with the cavity (5), a breech bottom (8) located opposite the cavity (5) and fixedly secured at a predetermined distance from the housing (1), and a sealing sleeve (12) located in the cavity (5) of the housing (1) and displaceable axially away from the breech bottom (8) and toward the breech bottom (8) for enabling, respectively, a sidewise feeding of a catridge (10) for positioning the catridge between the breech bottom and the sealing sleeve (12) and for securing the catridge between the breech bottom (8) and the sealing sleeve (12).
    Type: Application
    Filed: December 16, 2003
    Publication date: September 16, 2004
    Inventors: Tilo Dittrich, Gerhard Ehmig, Thomas Sperrfechter
  • Publication number: 20030218041
    Abstract: The present invention relates to a cartridge(10), in particular for a setting tool, comprising a sleeve member (11) and a sleeve cover (13), which form the jacket surface (13), and a bottom side (16) and a face side (15). Intended break zones (20) are arranged on the cartridge (10) surface to be opened, wherein the intended break zones are opened by the explosive pressure of a propellant charge (12) situated inside the cartridge (10). For the improvement of such cartridges (10), the intended break zone (20) is formed by weakened zones (21) extending from a center (22, 22′) and therefrom forming the shape of a star. The invention also relates to a device for firing a propellant charge situated within a cartridge, in particular for setting tools.
    Type: Application
    Filed: December 13, 2002
    Publication date: November 27, 2003
    Inventors: Tilo Dittrich, Gerhard Ehmig, Norbert Heeb, Jens Neumann, Thomas Sperrfechter