Patents by Inventor Harald Schliemann

Harald Schliemann 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: 10954910
    Abstract: A starting device for a combustion engine includes a housing relative to which a rope pulley, a spring housing and an entrainer can rotate about a rotation axis. A coupling unit produces a rotationally-fixed connection between the rope pulley and the spring housing in response to a rotational movement of the rope pulley in a starting direction. The spring housing has a spring receiving space for a tension spring and is connected to an entrainer by the spring. The coupling unit has a first coupling element and a second coupling element, which interact at a contact location which is at a spacing (d) to the rotation axis and is at least as large as the maximum spacing (c) of the tension spring to the rotation axis.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: March 23, 2021
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Harald Schliemann
  • Patent number: 10941786
    Abstract: A handheld work apparatus has a blower wheel. The blower wheel is held via a nut on the shaft in a manner locked against rotation by frictional force. A thread moment of friction is transmittable between the nut and the shaft via a thread section. A first moment of friction is transmittable between the nut and the blower wheel via a first friction contact surface. The first friction contact surface is configured such that, at a minimum tightening torque of the nut, the first moment of friction is greater than the thread moment of friction. As a result, during the operation of the work apparatus when there is a relative movement between the blower wheel and the shaft, the blower wheel moves the nut along therewith. The nut retensions the blower wheel against the shaft. The second friction contact surface runs conically with respect to the rotational axis.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: March 9, 2021
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Harald Schliemann, Ralf Cornelsen, Wolfgang Weissert
  • Patent number: 10794351
    Abstract: A starter device for an internal combustion engine has a rope pulley and a starter rope wound onto the rope pulley. A rope guide guiding the starter rope from the guide pulley to a rope outlet opening of the starter device is provided. A guide element positioned at the rope outlet opening holds the starter rope in the rope outlet opening. The rope guide has at least one deflection element that is arranged at the rope outlet opening. The deflection element has two tangents which are intersecting each other at an angle of less than 90°. The deflection element has a minimal radius of a length that is longer than a length of a diameter of the starter rope. The starter handle can be positioned relative to the rope outlet opening at different orientations and enables ergonomic starting of the internal combustion engine of a backpack power tool.
    Type: Grant
    Filed: September 1, 2019
    Date of Patent: October 6, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Harald Schliemann
  • Publication number: 20190383255
    Abstract: A starter device for an internal combustion engine has a rope pulley and a starter rope wound onto the rope pulley. A rope guide guiding the starter rope from the guide pulley to a rope outlet opening of the starter device is provided. A guide element positioned at the rope outlet opening holds the starter rope in the rope outlet opening. The rope guide has at least one deflection element that is arranged at the rope outlet opening. The deflection element has two tangents which are intersecting each other at an angle of less than 90°. The deflection element has a minimal radius of a length that is longer than a length of a diameter of the starter rope. The starter handle can be positioned relative to the rope outlet opening at different orientations and enables ergonomic starting of the internal combustion engine of a backpack power tool.
    Type: Application
    Filed: September 1, 2019
    Publication date: December 19, 2019
    Inventors: Gerd Densborn, Harald Schliemann
  • Patent number: 10451017
    Abstract: A starter device for an internal combustion engine has a rope pulley and a starter rope wound onto the rope pulley. A starter handle is fastened to the starter rope. A rope guide with a first deflection roller is provided. A rope outlet opening is arranged along a circumferential section of the first deflection roller and extends along the circumferential section of the first deflection roller about a peripheral angle of the first deflection roller of at least 60°. The rope guide guides the starter rope from the guide pulley to the rope outlet opening of the starter device. A guide element is arranged at rope outlet opening and holds the starter rope in the rope outlet opening. The starter handle can be positioned relative to the rope outlet opening at different orientations and enables ergonomic starting of the internal combustion engine of a backpack power tool.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: October 22, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Harald Schliemann
  • Publication number: 20190285042
    Abstract: A starting device for a combustion engine includes a housing relative to which a rope pulley, a spring housing and an entrainer can rotate about a rotation axis. A coupling unit produces a rotationally-fixed connection between the rope pulley and the spring housing in response to a rotational movement of the rope pulley in a starting direction. The spring housing has a spring receiving space for a tension spring and is connected to an entrainer by the spring. The coupling unit has a first coupling element and a second coupling element, which interact at a contact location which is at a spacing (d) to the rotation axis and is at least as large as the maximum spacing (c) of the tension spring to the rotation axis.
    Type: Application
    Filed: March 18, 2019
    Publication date: September 19, 2019
    Inventors: Gerd Densborn, Harald Schliemann
  • Patent number: 10357099
    Abstract: A back carrier has a back plate and a shoulder strap. The back plate has a longitudinal extent and, in the direction of its longitudinal extent, has an upper and a lower end section. The upper end section reaches as far as the upper end of the back plate. The strap extends on the back side of the back plate, which faces toward the back of a user. The strap is fastened with a first strap section in the area of the upper end section to an upper fastening location and is fastened with a second strap section in the area of the lower end section to a lower fastening location. In the area of the upper end section, the back plate has a recess for receiving an extension plate. In the direction of the longitudinal extent, the recess is open toward the upper end of the back plate.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: July 23, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jens Riehmann, Markus Zeller, Harald Schliemann
  • Publication number: 20190085861
    Abstract: A handheld work apparatus has a blower wheel. The blower wheel is held via a nut on the shaft in a manner locked against rotation by frictional force. A thread moment of friction is transmittable between the nut and the shaft via a thread section. A first moment of friction is transmittable between the nut and the blower wheel via a first friction contact surface. The first friction contact surface is configured such that, at a minimum tightening torque of the nut, the first moment of friction is greater than the thread moment of friction. As a result, during the operation of the work apparatus when there is a relative movement between the blower wheel and the shaft, the blower wheel moves the nut along therewith. The nut retensions the blower wheel against the shaft. The second friction contact surface runs conically with respect to the rotational axis.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Inventors: Gerd Densborn, Harald Schliemann, Ralf Cornelsen, Wolfgang Weissert
  • Patent number: 10233880
    Abstract: A suction head for connection to a fuel hose in a fuel tank has a base member made of an injection molding material. The base member has a peripheral wall surface provided with cutouts and also has an end face opening. A cap closes off the end face opening. A connecting socket for the fuel hose is provided on the suction head. A first filter element is received inside the base member. A second filter element covering the cutouts is provided and is made of a filter fabric, wherein the filter fabric is a twill weave fabric or a satin weave fabric. The filter fabric has a mesh size that is greater than 10 ?m and smaller than 25 ?m. A power tool with a four-stroke engine is provided with such a suction head in the fuel tank.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: March 19, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jens Riehmann, Harald Schliemann, Manuel Dangelmaier
  • Publication number: 20180128221
    Abstract: A suction head for connection to a fuel hose in a fuel tank has a base member made of an injection molding material. The base member has a peripheral wall surface provided with cutouts and also has an end face opening. A cap closes off the end face opening. A connecting socket for the fuel hose is provided on the suction head. A first filter element is received inside the base member. A second filter element covering the cutouts is provided and is made of a filter fabric, wherein the filter fabric is a twill weave fabric or a satin weave fabric. The filter fabric has a mesh size that is greater than 10 ?m and smaller than 25 ?m. A power tool with a four-stroke engine is provided with such a suction head in the fuel tank.
    Type: Application
    Filed: October 10, 2017
    Publication date: May 10, 2018
    Inventors: Jens Riehmann, Harald Schliemann, Manuel Dangelmaier
  • Publication number: 20180042365
    Abstract: A back carrier has a back plate and a shoulder strap. The back plate has a longitudinal extent and, in the direction of its longitudinal extent, has an upper and a lower end section. The upper end section reaches as far as the upper end of the back plate. The strap extends on the back side of the back plate, which faces toward the back of a user. The strap is fastened with a first strap section in the area of the upper end section to an upper fastening location and is fastened with a second strap section in the area of the lower end section to a lower fastening location. In the area of the upper end section, the back plate has a recess for receiving an extension plate. In the direction of the longitudinal extent, the recess is open toward the upper end of the back plate.
    Type: Application
    Filed: August 10, 2017
    Publication date: February 15, 2018
    Inventors: Jens Riehmann, Markus Zeller, Harald Schliemann
  • Publication number: 20180045158
    Abstract: A starter device for an internal combustion engine has a rope pulley and a starter rope wound onto the rope pulley. A starter handle is fastened to the starter rope. A rope guide with a first deflection roller is provided. A rope outlet opening is arranged along a circumferential section of the first deflection roller and extends along the circumferential section of the first deflection roller about a peripheral angle of the first deflection roller of at least 60°. The rope guide guides the starter rope from the guide pulley to the rope outlet opening of the starter device. A guide element is arranged at rope outlet opening and holds the starter rope in the rope outlet opening. The starter handle can be positioned relative to the rope outlet opening at different orientations and enables ergonomic starting of the internal combustion engine of a backpack power tool.
    Type: Application
    Filed: August 3, 2017
    Publication date: February 15, 2018
    Inventors: Gerd Densborn, Harald Schliemann
  • Patent number: 9061301
    Abstract: The application sets forth a knapsack or backpack spraying device having a blower unit and a spraying medium container fixed to a carrying frame. The blower unit conveys an air stream through a blower pipe. Spraying medium is fed from the spraying medium container to the air stream. The spraying medium container has a filling opening which is closed by a cover. The cover has a lower edge facing the spraying medium container. The spraying device has a standing position in which it stands on a flat, horizontal standing face and in which the cover is arranged on an upper side of the spraying medium container facing away from the standing face. To reliably avoid contact of the operator with spraying medium, the height of the carrying frame, measured at right angles to the standing face, is at least 80% of the overall height of the spraying device.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 23, 2015
    Assignee: ANDREAS STIHL AG & CO. KG
    Inventors: Christine Bähr, Harald Schliemann
  • Publication number: 20140209705
    Abstract: The application sets forth a knapsack or backpack spraying device having a blower unit and a spraying medium container fixed to a carrying frame. The blower unit conveys an air stream through a blower pipe. Spraying medium is fed from the spraying medium container to the air stream. The spraying medium container has a filling opening which is closed by a cover. The cover has a lower edge facing the spraying medium container. The spraying device has a standing position in which it stands on a flat, horizontal standing face and in which the cover is arranged on an upper side of the spraying medium container facing away from the standing face. To reliably avoid contact of the operator with spraying medium, the height of the carrying frame, measured at right angles to the standing face, is at least 80% of the overall height of the spraying device.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 31, 2014
    Inventors: Christine Bähr, Harald Schliemann
  • Publication number: 20120067972
    Abstract: A spraying unit has a drive engine for driving a blower, has a blow pipe through which an air flow is conveyed by the blower, and has a spraying agent tank which is arranged on a backpack of the spraying unit. A nozzle is provided which is connected via the spraying agent line to the spraying agent tank and which supplies spraying agent to the air flow. To obtain the same spraying agent discharge in almost any position of the blow pipe, it is provided that a pressure regulator is arranged in the spraying agent line upstream of the nozzle.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 22, 2012
    Inventor: Harald Schliemann
  • Patent number: 8104138
    Abstract: A portable handheld suction/blower apparatus includes a motor-driven blower (1) and at least one air guide tube (3) connected to the blower (1) at a connecting location (2) to conduct flow. The connecting location (2) is configured at least as a double-winding connection (9) which has pairs of outer thread sections (4) of an outer winding (5) and inner thread sections (7) of an inner winding (8). The pairs are distributed about the periphery of the threaded connection. The periphery of the connecting location (2) is subdivided by the number of pairs of thread sections (4, 7) into a corresponding number of angular segments (10). The sum of angular extents (?, ?) of a pair of individual thread sections (4, 7) is in total less than an angular extent (?) of the corresponding angular segment (10).
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: January 31, 2012
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Harald Schliemann, Manfred Rabis
  • Publication number: 20110056047
    Abstract: A back carried work apparatus has a back carrier (2) with a back carrier plate (15). The back carrier plate (15) extends in an upward direction (21) and in a lateral direction (41) when the back carrier (2) is arranged on the back of an operator (14). A drive motor (8) is arranged on the back carrier (2) and rotatably drives a blower wheel (9) about a rotational axis (11) arranged transversely to the back carrier plate (15). The blower wheel (9) moves an air flow through the blower spiral (10) and blower tube (12) connected to the blower output (23) of the blower spiral (10). A simple configuration results when the blower tube (12) is pivotally mounted about a pivot axis (25) which extends in the lateral direction (41) of the back carrier plate (15).
    Type: Application
    Filed: September 7, 2010
    Publication date: March 10, 2011
    Inventors: Harald Schliemann, Klaus Langhans
  • Publication number: 20110056443
    Abstract: A back-carried work apparatus has a back carrier (2), which has two shoulder straps (3, 4) to carry the back carrier (2) on a back and carries a drive motor (20). The drive motor (20) is configured as a combustion engine. A fuel tank (7) for the drive motor (20) is arranged on the back carrier (2). In order to make fuel extraction possible up to the least possible amount of residual, the tank base (8, 28) of the fuel tank (7) has a lowest region which extends over less than 20% of the width (d) of the tank base (8, 28) when the shoulder straps (3, 4) are arranged on the shoulders of the operator.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 10, 2011
    Inventor: Harald Schliemann
  • Patent number: 7896612
    Abstract: A blower unit for a portable blower, having a drive shaft that is rotatably driven by a drive motor. Disposed in the blower unit is an axial fan that is provided with at least one fan wheel driven by the drive shaft and at least guide wheel fixedly disposed in the housing. To achieve a simple construction and a simple manufacture, the housing has at least two housing sections and is divided approximately parallel to the axis of rotation of the drive shaft.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: March 1, 2011
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Harald Schliemann, Manfred Rabis, Daniel Hirt
  • Patent number: 7837434
    Abstract: A hand-guided power tool has a housing having a first housing part and a second housing part. A grip unit has at least one handle for guiding the power tool and forms the first housing part. A motor unit is arranged in the second housing part and has a drive motor. The grip unit and the motor unit are connected to one another by at least one antivibration element. The at least one antivibration element has a first end secured to the first housing part and a second end secured to the second housing part. The first housing part has at least one receptacle extending from an exterior of the first housing part into a housing interior of the housing. The at least one antivibration element has a longitudinal extension and is surrounded over at least a portion of the longitudinal extension by the at least one receptacle.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: November 23, 2010
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Manfred Rabis, Harald Schliemann