Patents by Inventor Franz Buchel

Franz Buchel 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: 7040261
    Abstract: The invention relates to a combustion driven working tool having a combustion chamber (2), a piston (8) guided in a cylinder (5), an ignition system for igniting a fuel supplied to the combustion chamber (2) for driving the piston (8) and a fan (7) at least for ventilating the combustion chamber (2). The running time and/or the speed of the fan (7) can be set as a factor of a measured temperature to realize a combustion driven working tool where an optimal ignition behavior can be set under changing working conditions, in particular under conditions of changing external temperature. A combustion chamber temperature is measured by a first temperature sensor (3) arranged on the combustion chamber (2) and supplied to a control unit (9), which calculates the cooling time and/or the speed for the fan (7) as a factor of the measured combustion chamber temperature and supplies these values to the motor (4).
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: May 9, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Thomas Granacher, Franz Büchel, Ulrich Schiestl
  • 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
  • Publication number: 20050224024
    Abstract: The invention relates to a combustion driven working tool having a combustion chamber (2), a piston (8) guided in a cylinder (5), an ignition system for igniting a fuel supplied to the combustion chamber (2) for driving the piston (8) and a fan (7) at least for ventilating the combustion chamber (2). The running time and/or the speed of the fan (7) can be set as a factor of a measured temperature to realize a combustion driven working tool where an optimal ignition behavior can be set under changing working conditions, in particular under conditions of changing external temperature. A combustion chamber temperature is measured by a first temperature sensor (3) arranged on the combustion chamber (2) and supplied to a control unit (9), which calculates the cooling time and/or the speed for the fan (7) as a factor of the measured combustion chamber temperature and supplies these values to the motor (4).
    Type: Application
    Filed: December 17, 2003
    Publication date: October 13, 2005
    Inventors: Thomas Granacher, Franz Buchel, Ulrich Schiestl
  • Patent number: 6536647
    Abstract: A holder for a drive piston (8) of a setting tool, and including a return element (19) having a first end (21) that applies pressure to the drive piston (8), and a second end (22) spaced from the first end (21), and axial and radial stop elements (16-18) fixedly securable in the setting tool and against which the second end (22) of the return element (21) is displaceable and elastically deformed upon displacement of the drive piston (8) in the setting direction (20).
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: March 25, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventors: Franz Büchel, Gerhard Ehmig, Thomas Sperrfechter, Markus Frommelt
  • Patent number: 6481609
    Abstract: A piston holder for a drive piston of a setting tool and including at least one clamp member (18; 24; 25; 36; 39; 40; 52; 58) that is constantly non-rigidly pressed against a circumference of the drive piston (8), and elements for supporting the at least one clamp member for an eccentric movement in a plane in which a central axis (10a) of the drive piston (8) is located.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: November 19, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Tilo Dittrich, Franz Büchel, Gerhard Ehmig, Thomas Sperrfechter
  • Patent number: 6478208
    Abstract: A piston holder for a drive piston (8) of a setting tool and having a carrier (7) for two expansion legs (22, 23) for frictionally receiving the drive piston (8) therebetween, with the carrier (7) being fixedly secured in the setting tool.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: November 12, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Franz Büchel, Thomas Sperrfechter
  • Publication number: 20020130155
    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: Application
    Filed: January 29, 2002
    Publication date: September 19, 2002
    Inventors: Stefan Bonig, Franz Buchel, Markus Frommelt, Thomas Sperrfechter, Norbert Heeb, Jens Neumann
  • Publication number: 20020130156
    Abstract: A holder for a drive piston (8) of a setting tool, and including a return element (19) having a first end (21) that applies pressure to the drive piston (8), and a second end (22) spaced from the first end (21), and axial and radial stop elements (16-18) fixedly securable in the setting tool and against which the second end (22) of the return element (21) is displaceable and elastically deformed upon displacement of the drive piston (8) in the setting direction (20).
    Type: Application
    Filed: January 29, 2002
    Publication date: September 19, 2002
    Inventors: Franz Buchel, Gerhard Ehmig, Thomas Sperrfechter, Markus Frommelt
  • Publication number: 20020108488
    Abstract: A piston support, in particular for a driving piston (8) of a setting tool, has a cylindrical section (10a) followed by a wedge-shaped section (10) extending toward the trailing end of the driving piston (8) and with a wedge-shaped surface (18) inclined inwardly towards the piston central axis (16). At least one braking element (23), presses against the cylindrical section (10a) in the ready-to-fire position of the driving piston (8) and a pressure force on the driving piston (8) reduces when the braking element (23) on movement of the driving piston (8) in the forward direction of travel, comes to rest opposite the wedge-shaped surface (18). When this is done, the driving piston can be guided smoothly and returned under braking into its ready-to-fire position, and held there securely.
    Type: Application
    Filed: February 8, 2002
    Publication date: August 15, 2002
    Inventors: Stefan Bonig, Franz Buchel, Markus Frommelt, Thomas Sperrfechter
  • Publication number: 20020108991
    Abstract: A piston holder for a drive piston of a setting tool and including at least one clamp member (18; 24; 25; 36; 39; 40; 52; 58) that is constantly non-rigidly pressed against a circumference of the drive piston (8), and elements for supporting the at least one clamp member for an eccentric movement in a plane in which a central axis (10a) of the drive piston (8) is located.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 15, 2002
    Inventors: Tilo Dittrich, Franz Buchel, Gerhard Ehmig, Thomas Sperrfechter
  • Publication number: 20020108988
    Abstract: A piston holder for a drive piston (8) of a setting tool and having a carrier (7) for two expansion legs (22, 23) for frictionally receiving the drive piston (8) therebetween, with the carrier (7) being fixedly secured in the setting tool.
    Type: Application
    Filed: February 8, 2002
    Publication date: August 15, 2002
    Inventors: Franz Buchel, Thomas Sperrfechter
  • Patent number: 6425354
    Abstract: A method of controlling operation of a portable, combustion-engined tool including a combustion chamber (1) an inlet/outlet valve (26) of which is closed or is opened dependent on an operational phase of the tool, with the method including igniting a fuel gas mixture filling the combustion chamber (1) for build-up of gas pressure therein and closing or opening the inlet/outlet valves (26) dependent on the gas pressure developed in the combustion chamber (1), and a tool in which the method is implemented.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: July 30, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Franz Büchel, Stefan Bönig, Joachim Thieleke, Iwan Wolf
  • Publication number: 20020020374
    Abstract: A method of controlling operation of a portable, combustion-engined tool including a combustion chamber (1) an inlet/outlet valve (26) of which is closed or is opened dependent on an operational phase of the tool, with the method including igniting a fuel gas mixture filling the combustion chamber (1) for build-up of gas pressure therein and closing or opening the inlet/outlet valves (26) dependent on the gas pressure developed in the combustion chamber (1), and a tool in which the method is implemented.
    Type: Application
    Filed: December 19, 2000
    Publication date: February 21, 2002
    Inventors: Franz Buchel, Stefan Bonig, Joachim Thieleke, Iwan Wolf
  • Patent number: 5136921
    Abstract: An explosive powder charge operated setting tool has a housing (1) including an axially extending housing section (5) enclosing a driving piston guide tube (8) axially displaceable within the housing section. The guide tube (8) is held in a neutral position by a spring clip (15, 16). The spring clip (15, 16) is U-shaped and engages at a first end (15a, 16a) radially inwardly of the housing section (5) into a recess (8c, 8d) of the guide tube and bears against a shoulder (8e) at one end of the recess (8c, 8d). The second end (15c, 16c) of the spring clip (15, 16) extends tangentially of and in prestressed contact with an outside surface of the housing section (5) and is diametrically opposite the first end (15a, 16a).
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: August 11, 1992
    Assignee: Hilti Aktiengesellschaft
    Inventor: Franz Buchel
  • Patent number: 4077556
    Abstract: In an explosive powder charge driven fastening element setting gun, a barrel is displaceably mounted in a housing forward of a firing pin. By pressing the barrel rearwardly, it moves the firing pin into the cocked position. The firing pin is released from the cocked position by a latch which turns the firing pin about its axis. The latch includes a driving cam engageable with a lug extending laterally from the firing pin for rotating the firing pin. It also includes a return cam which guides the lug in its movement in its axial direction from the cocked position into the firing position.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: March 7, 1978
    Assignee: Hilti Aktiengesellschaft
    Inventor: Franz Buchel
  • Patent number: 3991925
    Abstract: In a setting gun for driving fastening elements into a hard receiving material, a magazine for feeding fastening elements into the setting gun barrel is pivotally mounted on the barrel. The magazine has an outlet opening through which the fastening elements pass into an inlet opening into the barrel bore. When the setting gun is in condition to be fired the magazine is locked from movement which would permit alignment between its outlet opening and the inlet opening to the barrel bore. By axially displacing the barrel out of the firing condition to overcome the locking action, the magazine can be pivoted for registering its outlet opening with the barrel bore inlet opening for feeding a fastening element into the bore.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: November 16, 1976
    Assignee: Hilti Aktiengesellschaft
    Inventor: Franz Buchel