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).
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Patent number: 12140214Abstract: 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: GrantFiled: June 17, 2020Date of Patent: November 12, 2024Assignee: Hilti AktiengesellschaftInventors: Daniel Seltmann, Josef Fuenfer
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Publication number: 20220213953Abstract: 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: ApplicationFiled: June 17, 2020Publication date: July 7, 2022Inventors: Daniel SELTMANN, Josef FUENFER
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Patent number: 11072062Abstract: 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: GrantFiled: April 11, 2017Date of Patent: July 27, 2021Assignee: Hilti AktiengesellschaftInventor: Josef Fuenfer
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Publication number: 20190118363Abstract: 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: ApplicationFiled: April 11, 2017Publication date: April 25, 2019Applicant: Hilti AktiengesellschaftInventor: Josef FUENFER
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Patent number: 9969072Abstract: 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: GrantFiled: April 5, 2012Date of Patent: May 15, 2018Assignee: Hilti AktiengesellschaftInventor: Josef Fuenfer
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Patent number: 9527199Abstract: 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: GrantFiled: May 22, 2013Date of Patent: December 27, 2016Assignee: Hilti AktiengesellschaftInventors: Orlaw Massler, Josef Fuenfer
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Publication number: 20130319712Abstract: 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: ApplicationFiled: May 22, 2013Publication date: December 5, 2013Applicant: Hilti AktiengesellschaftInventors: Orlaw MASSLER, Josef Fuenfer
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Publication number: 20120267138Abstract: 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: ApplicationFiled: April 5, 2012Publication date: October 25, 2012Applicant: Hilti AktiengesellschaftInventor: Josef Fuenfer
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Patent number: 7802711Abstract: 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: GrantFiled: July 16, 2008Date of Patent: September 28, 2010Assignee: Hilti AktiengesellschaftInventor: Josef Fuenfer
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Publication number: 20090151967Abstract: 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: ApplicationFiled: December 9, 2008Publication date: June 18, 2009Inventors: Guenter Haas, Franz Moessnang, Josef Fuenfer
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Publication number: 20090020302Abstract: 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: ApplicationFiled: July 16, 2008Publication date: January 22, 2009Inventor: Josef Fuenfer
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Publication number: 20080283260Abstract: 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: ApplicationFiled: May 1, 2008Publication date: November 20, 2008Inventors: Herbert Kramer, Josef Fuenfer
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Publication number: 20080217039Abstract: 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: ApplicationFiled: March 5, 2008Publication date: September 11, 2008Inventors: Josef Fuenfer, Michael Schamberger
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Publication number: 20070277992Abstract: 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: ApplicationFiled: May 25, 2007Publication date: December 6, 2007Inventor: Josef Fuenfer
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Patent number: 5265688Abstract: 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: GrantFiled: August 17, 1992Date of Patent: November 30, 1993Assignee: Hilti AktiengesellschaftInventors: Gerhard Rumpp, Josef Obermeier, Josef Fuenfer