Patents by Inventor Josef Fuenfer

Josef Fuenfer 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: 12140214
    Abstract: Composite gearwheel for an electropneumatic hammer drill, wherein the composite gearwheel has a basic body, consisting of a first material, and an encircling toothing, and wherein the encircling toothing is formed, along a first circular arc, by a toothed body of the composite gearwheel, and is formed, along the remaining second circular arc, by the basic body itself, wherein the toothed body consists of a second material that is different than the first material.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 12, 2024
    Assignee: Hilti Aktiengesellschaft
    Inventors: Daniel Seltmann, Josef Fuenfer
  • Publication number: 20220213953
    Abstract: Composite gearwheel for an electropneumatic hammer drill, wherein the composite gearwheel has a basic body, consisting of a first material, and an encircling toothing, and wherein the encircling toothing is formed, along a first circular arc, by a toothed body of the composite gearwheel, and is formed, along the remaining second circular arc, by the basic body itself, wherein the toothed body consists of a second material that is different than the first material.
    Type: Application
    Filed: June 17, 2020
    Publication date: July 7, 2022
    Inventors: Daniel SELTMANN, Josef FUENFER
  • Patent number: 11072062
    Abstract: A handheld power tool (1) is provided, including a tool holder (2) for receiving and locking a tool (3) on a working axis (4), and including a power tool housing (6). A striking mechanism (8) includes a striker (10) for applying impacts in the impact direction (9) and an anvil (11) for absorbing the impacts and for transmitting the impacts in the impact direction (9) onto the tool (3) accommodated in the tool holder (2). A collar (18) is fastened to the power tool housing (6) and to the anvil (11). When the anvil (11) abuts a rebound impact damper (13) in the impact direction (9), the elastic collar (18) applies a force acting in the impact direction (9) onto the anvil (11).
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: July 27, 2021
    Assignee: Hilti Aktiengesellschaft
    Inventor: Josef Fuenfer
  • Publication number: 20190118363
    Abstract: A handheld power tool (1) is provided, including a tool holder (2) for receiving and locking a tool (3) on a working axis (4), and including a power tool housing (6). A striking mechanism (8) includes a striker (10) for applying impacts in the impact direction (9) and an anvil (11) for absorbing the impacts and for transmitting the impacts in the impact direction (9) onto the tool (3) accommodated in the tool holder (2). A collar (18) is fastened to the power tool housing (6) and to the anvil (11). When the anvil (11) abuts a rebound impact damper (13) in the impact direction (9), the elastic collar (18) applies a force acting in the impact direction (9) onto the anvil (11).
    Type: Application
    Filed: April 11, 2017
    Publication date: April 25, 2019
    Applicant: Hilti Aktiengesellschaft
    Inventor: Josef FUENFER
  • Patent number: 9969072
    Abstract: A production method provides for punching holes in a metal strip, cold-forming the metal strip to form a guide tube, and joining the lengthwise edges of the metal strip to each other by a seam or teeth so as to create a uniform material. Subsequently, a piston-like striker is inserted into the guide tube.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: May 15, 2018
    Assignee: Hilti Aktiengesellschaft
    Inventor: Josef Fuenfer
  • Patent number: 9527199
    Abstract: A hand-held power tool is disclosed. The tool has a pneumatic striking mechanism. The striking mechanism includes a motor-driven exciter, a guide tube and a striker. A pneumatic spring configured inside the guide tube between the exciter and the striker is circumferentially sealed pressure-tight by an inner surface of the guide tube. The exciter and/or the striker are configured as a piston guided by the inner surface. An inner surface of the guide tube is provided with a plurality of molded depressions.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 27, 2016
    Assignee: Hilti Aktiengesellschaft
    Inventors: Orlaw Massler, Josef Fuenfer
  • Publication number: 20130319712
    Abstract: A hand-held power tool is disclosed. The tool has a pneumatic striking mechanism. The striking mechanism includes a motor-driven exciter, a guide tube and a striker. A pneumatic spring configured inside the guide tube between the exciter and the striker is circumferentially sealed pressure-tight by an inner surface of the guide tube. The exciter and/or the striker are configured as a piston guided by the inner surface. An inner surface of the guide tube is provided with a plurality of molded depressions.
    Type: Application
    Filed: May 22, 2013
    Publication date: December 5, 2013
    Applicant: Hilti Aktiengesellschaft
    Inventors: Orlaw MASSLER, Josef Fuenfer
  • Publication number: 20120267138
    Abstract: A production method provides for punching holes in a metal strip, cold-forming the metal strip to form a guide tube, and joining the lengthwise edges of the metal strip to each other by a seam or teeth so as to create a uniform material. Subsequently, a piston-like striker is inserted into the guide tube.
    Type: Application
    Filed: April 5, 2012
    Publication date: October 25, 2012
    Applicant: Hilti Aktiengesellschaft
    Inventor: Josef Fuenfer
  • Patent number: 7802711
    Abstract: A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) transmits a reciprocating movement of the driving member (22) to the percussion member (23), The hand-held power tool further includes a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: September 28, 2010
    Assignee: Hilti Aktiengesellschaft
    Inventor: Josef Fuenfer
  • Publication number: 20090151967
    Abstract: An electrical hand-held power tool includes a driving element (9; 9?) displaceable in the tool housing (8) along a drive axis (A) for driving a working tool (7, 7?), and at least one rigid electrical module located in the housing (8), and secured therein by at least one spring (4) that preloads the electrical module against the housing (8).
    Type: Application
    Filed: December 9, 2008
    Publication date: June 18, 2009
    Inventors: Guenter Haas, Franz Moessnang, Josef Fuenfer
  • Publication number: 20090020302
    Abstract: A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23), and a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for steplessly adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
    Type: Application
    Filed: July 16, 2008
    Publication date: January 22, 2009
    Inventor: Josef Fuenfer
  • Publication number: 20080283260
    Abstract: A hand-held power tool a percussion mechanism (2) of which includes a percussion piston (4) displaceable by an air spring (3) of the power tool for applying blows to an anvil (5) that is dust-tightly and lubricant-tightly sealed with respect to its guide by two axially offset sealing elements (8) between which a lubricant chamber (9) for receiving a barrier lubricant (10) is formed.
    Type: Application
    Filed: May 1, 2008
    Publication date: November 20, 2008
    Inventors: Herbert Kramer, Josef Fuenfer
  • Publication number: 20080217039
    Abstract: A hand-held percussion power tool includes a pneumatic mechanism (20) having a guide (21) and a striking member reciprocating in the guide (21), and a braking device (30) for the striking member and including at least one braking member for breakingly engaging the striking member and formed as a pivot lever (31) a pivotal movement of which is controlled by the striking member.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 11, 2008
    Inventors: Josef Fuenfer, Michael Schamberger
  • Publication number: 20070277992
    Abstract: A percussion hand-held power tool includes a housing (4), a chuck (2) provided at one end of the housing (4), a handle (3) provided at an opposite end of the housing (4) and secured thereto, an axially displaceable percussion mechanism (5) located in the housing and connected thereto, at its handle side, by a spring (6) and a transversely extending articulated arm (7), and supported in the housing (4), at its chuck side, by axial slide surface element (8).
    Type: Application
    Filed: May 25, 2007
    Publication date: December 6, 2007
    Inventor: Josef Fuenfer
  • Patent number: 5265688
    Abstract: A rock drill has an axially extending shank (1) with a drill head (2) on one end. The drill head (2) has an end face (3) with a cutting blade (4) and cutting pins (5) extending outwardly from the end face in the drilling direction. The cutting blade (4) extends diametrically across the end face and projects radially outwardly from the drill head (2) and axially outwardly from the end face (3). The cutting pins (5) are arranged on a diameter of the drill head which forms an acute angle relative to the cutting blade (4). Due to the acute angle between the cutting pins and the diametrically arranged cutting blade, removal grooves extending axially from the end face can be enlarged.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: November 30, 1993
    Assignee: Hilti Aktiengesellschaft
    Inventors: Gerhard Rumpp, Josef Obermeier, Josef Fuenfer