Patents by Inventor Rolf Walter

Rolf Walter 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: 11303048
    Abstract: A plug connector for electrically connecting a tag connector to an electrical line of a motor-driven garden and/or forestry working apparatus includes a tag connector receptacle portion and a line receptacle portion. The tag connector receptacle portion has a first surface-clamping leg, a second surface-clamping leg, a first peripheral guiding blade and a second peripheral guiding blade, wherein the surface-clamping legs are disposed so as to be opposite one another and wherein the peripheral guiding blades are disposed so as to be opposite one another.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: April 12, 2022
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Georg Maier, Michael Schneider, Mario Haefele, Rolf Walter
  • Publication number: 20210167525
    Abstract: A plug connector for electrically connecting a tag connector to an electrical line of a motor-driven garden and/or forestry working apparatus includes a tag connector receptacle portion and a line receptacle portion. The tag connector receptacle portion has a first surface-clamping leg, a second surface-clamping leg, a first peripheral guiding blade and a second peripheral guiding blade, wherein the surface-clamping legs are disposed so as to be opposite one another and wherein the peripheral guiding blades are disposed so as to be opposite one another.
    Type: Application
    Filed: December 1, 2020
    Publication date: June 3, 2021
    Inventors: Georg MAIER, Michael SCHNEIDER, Mario HAEFELE, Rolf WALTER
  • Publication number: 20150126663
    Abstract: A resin composition [composition (C)] comprising: from 40 to 95% by volume (% v) of at least one aromatic polyimide [polymer (PI)], from 0.1 to 15% by volume (% v) of at least one compound having the general formula AnXm [compound (AnXm)], wherein each A is independently selected from a group consisting of a metal atom (M) which is selected from the group consisting of Fe, Co, Ni, Cu, Zn, Mo, Ag, Cd, Sn, Pt, Au, Hg, Pb and Tl and a semimetal atom (SM) which is selected from the group consisting of As, Sb and Bi; wherein each X is independently selected from a group consisting of As, Sb, S, Se and Te; with the proviso that when A is As or Sb then X is different from A; and wherein n and m equal or different from each other, are independently 1, 2, 3 and 4, from 0.
    Type: Application
    Filed: May 16, 2013
    Publication date: May 7, 2015
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC.
    Inventors: Thomas Burkhart, Rolf Walter, Hans-Peter Feldner, Yuhong Wu, Geoffrey Scott Underwood, Brian A. Stern
  • Patent number: 8833322
    Abstract: A portable work apparatus has a combustion engine for driving a work tool. An air/fuel mixture is supplied to the engine via a carburetor which is provided with an electrical heating element for heating to a given temperature. The heating element is connected to a switch via which electrical energy, which is provided by a generator driven by the engine, is supplied. When a given temperature is exceeded, the switch interrupts the energy supply. To achieve an exact temperature control, the ohmic resistance value of the heating element is stored in a memory in dependence on the temperature. The current flowing through the heating element and the voltage drop at the heating element are measured and the instantaneous resistance of the heating element is calculated therefrom. This calculated value is compared to the value stored in the memory to open or close the switch in dependence on the comparison.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 16, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Heinrich Leufen, Jörg Präger, David Fallscheer, Rolf Walter, Michael Link
  • Publication number: 20120118254
    Abstract: A portable work apparatus has a combustion engine for driving a work tool. An air/fuel mixture is supplied to the engine via a carburetor which is provided with an electrical heating element for heating to a given temperature. The heating element is connected to a switch via which electrical energy, which is provided by a generator driven by the engine, is supplied. When a given temperature is exceeded, the switch interrupts the energy supply. To achieve an exact temperature control, the ohmic resistance value of the heating element is stored in a memory in dependence on the temperature. The current flowing through the heating element and the voltage drop at the heating element are measured and the instantaneous resistance of the heating element is calculated therefrom. This calculated value is compared to the value stored in the memory to open or close the switch in dependence on the comparison.
    Type: Application
    Filed: November 17, 2011
    Publication date: May 17, 2012
    Inventors: Heinrich Leufen, Jörg Präger, David Fallscheer, Rolf Walter, Michael Link
  • Patent number: 8177586
    Abstract: A connector system (1) includes a plurality of connectors (39 to 45) which each have a plug and a counter plug. Each plug has a plurality of receptacles (29, 30) for contacts and each counter plug has a plurality of receptacles (29, 30) for counter contacts. In at least one receptacle (29, 30) of each plug, a contact is arranged and in at least one allocated receptacle (29, 30) of each counter plug, an allocated counter contact is arranged. In at least one of the connectors (39 to 45), at least one receptacle of a plug does not have a contact. In the allocated receptacle (29, 30) of the counter plug, a coding element is arranged which prevents the insertion of a contact into this receptacle (29, 30) of the counter plug.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: May 15, 2012
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Heiko Däschner, Rolf Walter, Michael Schneider
  • Publication number: 20110003516
    Abstract: A connector system (1) includes a plurality of connectors (39 to 45) which each have a plug and a counter plug. Each plug has a plurality of receptacles (29, 30) for contacts and each counter plug has a plurality of receptacles (29, 30) for counter contacts. In at least one receptacle (29, 30) of each plug, a contact is arranged and in at least one allocated receptacle (29, 30) of each counter plug, an allocated counter contact is arranged. In at least one of the connectors (39 to 45), at least one receptacle of a plug does not have a contact. In the allocated receptacle (29, 30) of the counter plug, a coding element is arranged which prevents the insertion of a contact into this receptacle (29, 30) of the counter plug.
    Type: Application
    Filed: July 2, 2010
    Publication date: January 6, 2011
    Inventors: Heiko Däschner, Rolf Walter, Michael Schneider
  • Patent number: 7816796
    Abstract: A hand-held power tool has a drive motor driving a tool and a generator. One or more heating devices having one or more heating elements are provided. The generator supplies the one or more heating devices with energy. A control device controls a power supplied to the one or more heating elements as a function of at least one operating parameter of the drive motor.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: October 19, 2010
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Heinrich Leufen, Rolf Walter, Fried Berkenkamp
  • Publication number: 20100224466
    Abstract: A portable handheld work apparatus has an internal combustion engine (7) which includes an ignition system. An operating-mode position selector (55) is provided which closes a first switch (76) in a first position and closes a second switch (77) in a second position. The first switch (76) includes a first contact (39) and the second switch (77) includes a second contact (40). A simple and robust configuration is provided when the first contact (39) and the second contact (40) are formed on the operating-mode position selector (55).
    Type: Application
    Filed: March 3, 2010
    Publication date: September 9, 2010
    Inventors: Klaus Leinmüller, Lukas Zürcher, Rolf Walter
  • Publication number: 20080036429
    Abstract: A hand-held power tool has a drive motor driving a tool and a generator. One or more heating devices having one or more heating elements are provided. The generator supplies the one or more heating devices with energy. A control device controls a power supplied to the one or more heating elements as a function of at least one operating parameter of the drive motor.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 14, 2008
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventors: Heinrich Leufen, Rolf Walter, Fried Berkenkamp
  • Publication number: 20030097730
    Abstract: A heating device is provided for a handle of a portable implement, especially a chain saw, a brush cutter, trimmer or the like. At least one heating element is disposed in the handle for heating the handle. The heat-conducting element is connected to the heating element and serves for a distribution of heat within the handle and for a transfer of heat to the handle.
    Type: Application
    Filed: November 12, 2002
    Publication date: May 29, 2003
    Applicant: Andreas Stihl AG & Co, Badstr.
    Inventors: Heinrich Leufen, Rolf Walter, Mohamed Abou-Aly
  • Patent number: 6232672
    Abstract: A hand-held work tool has a housing with a carburetor heater and a grip heater. An internal combustion engine is mounted in the housing and has a crankshaft and an ignition system. The ignition system has a pole wheel with permanent magnets fastened sequentially at a periphery of the pole wheel in the circumferential direction. Charge armatures are mounted in the housing and close the magnetic circuit between neighboring permanent magnets. The charge armatures have legs and excitation coils mounted on the legs. Upon rotation of the pole wheel, the permanent magnets generate an electric current in the excitation coils, wherein a first set of excitation coils is combined to a first partial generator and connected to an electric circuit of the carburetor heater and a second set of the excitation coils is combined to a second partial generator and connected to an electric circuit of the grip heater such that the electric current is supplied respectively to the carburetor heater and the grip heater.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: May 15, 2001
    Assignee: Firma Andreas Stihl AG & Co.
    Inventors: Heinrich Leufen, Rolf Walter
  • Patent number: 5740842
    Abstract: A fuel tank arrangement for a motor vehicle. The arrangement includes a fuel tank containing fuel therein and having a gas space disposed above the fuel, and a venting device connected to the fuel tank. The venting device includes an activated charcoal filter and a venting conduit connecting the gas space to the activated charcoal filter for establishing gas communication therebetween. A stop valve is disposed in the venting conduit and is adapted to open gas communication between the gas space and the activated charcoal filter during refueling. Moreover, a fuel separator is disposed in the venting conduit for separating fuel from a gas flow through the venting conduit thereby yielding separated fuel.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: April 21, 1998
    Assignees: Walter Alfmeier GmbH + Co. Prazisions-Baugruppenelemente, Mercedes Benz AG
    Inventors: Josef Maier, Dieter Simon, Wolfgang Liebhart, Thomas Theuer, Klaus Muller, Rolf Walter, Dieter Scheurenbrandt, Manfred Weil, Wolfgang Freiwald, Gerhard Kiermaier
  • Patent number: 4296981
    Abstract: A desk with a channel which extends directly below the table top on the backside thereof and which is removably guided in the desk. The channel has a U or L-shaped profile for receiving cables and wires therein. The outer leg of the profile is in alignment, in the retracted condition thereof, with the desk wall and has openings for facilitating an exiting of the cables and wires therethrough. At least on one side of the channel which extends parallel to the table top there is secured a further channel extending perpendicularly to the channel and which extends downwardly. This further channel together with the first channel is movable and can be moved into a recess in a base of the desk and has a connection to the horizontally extending channel.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: October 27, 1981
    Inventors: Norbert Hildebrandt, Norbert Becker, Rolf Walter, Manfred Hoffman