Patents by Inventor Dietmar Hartmann

Dietmar Hartmann 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: 7878490
    Abstract: An implement for lawn and garden care includes a housing, a drive, and a handle attached to the housing with a vibration damping arrangement. The damping arrangement includes an at least partially elastic damping element. The stiffness of the damping element is determined by its cross section that includes at least one cavity or recess.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: February 1, 2011
    Assignee: Deere & Company
    Inventors: Dietmar Hartmann, Wolfgang Nowack, Franz Joseph
  • Patent number: 7873451
    Abstract: An air supply mechanism for a vehicle seat comprises a control device for driving a fan and a heating element connected downstream of the fan. When the vehicle is unlocked, a vehicle door is opened and/or a folding-top switch is actuated in order to open the folding-top, the control device causes a heating element to be preconditioned. When there is a switching-on signal for the air supply mechanism, the control device ends the preconditioning and switches on the heating element and the fan. The heating element and fan are subsequently regulated by the control device as a function of vehicle speed and external temperature. In this manner, a seat occupant does not experience an initial draft or a delayed switching-on reaction but rather experiences a pleasant warmth even immediately after the air supply mechanism is switched on.
    Type: Grant
    Filed: June 18, 2005
    Date of Patent: January 18, 2011
    Assignee: Daimler AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Patent number: 7708626
    Abstract: An air supply device for an automotive seat includes an air duct which is arranged at the delivery side of a fan and has at least one air outlet opening provided in the upper region of the seat for supplying the head, shoulder and neck region of a seat occupant with a flow of air. A heating element is arranged in the air duct between the fan and the air outlet opening, and the air supply device has at least one sensor for detecting a parameter value as a function of which the flow of air emerging from the air outlet opening is controlled. In order to provide the air supply device with a flow of air which can be controlled in a more universal manner, the sensor is arranged inside the air duct between the air outlet opening and the heating element.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: May 4, 2010
    Assignee: Daimler AG
    Inventors: Claudio Bargheer, Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Patent number: 7621594
    Abstract: The present invention discloses an air supply mechanism for a vehicle seat (12), and a method for the operation thereof. The air supply mechanism comprises a control device (24), for driving a fan (38) and a heating element (39) connected downstream of the fan (38). When the air supply mechanism is switched on, the control device (24) switches on a heating element (39) and at the same time carries out a starting control of a fan (38) in such a manner that the fan (38) starts and is operated at minimum blower speed for a predetermined period of time before the blower speed is raised to a predetermined working point and subsequently the blower speed is regulated as a function of the driving speed. In this manner, a seat occupant does not experience an initial sensation of draft due to a powerful discharge of relatively cold air but rather experiences a pleasant warmth even directly after the mechanism is switched on.
    Type: Grant
    Filed: June 18, 2005
    Date of Patent: November 24, 2009
    Assignee: Daimler AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Patent number: 7503625
    Abstract: An air supply device for a vehicle seat has an air channel arranged on the pressure side of a blower. The channel comprises at least one air discharge opening provided in the upper region of the seat for supplying the head, shoulder and neck area of an occupant of the seat with an adjustable airflow. A heating element is arranged in the air channel between the blower and the air discharge opening. In order to provide the air supply device with an airflow which feels more comfortable to the occupant of the seat, a grid element is arranged inside the air channel between the air discharge opening and the heating element. As a result, the airflow emerging from the air discharge opening is homogenized and slowed down, and this slowing-down allows more heat to be transferred to the airflow from the heating element.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: March 17, 2009
    Assignee: Daimler AG
    Inventors: Claudio Bargheer, Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20090028534
    Abstract: A heating device for heating an air stream in a motor vehicle has at least one heating layer, preferably consisting of electrically heatable material, and at least one air-throughflow layer through which the air stream can pass. The air-throughflow layer has a structure by which the air stream can be converted into a turbulent or diffuse flow. For this purpose, the structure of the air-throughflow layer preferably has a multiplicity of spacer threads, webs and wires, or the like.
    Type: Application
    Filed: February 16, 2006
    Publication date: January 29, 2009
    Applicant: DaimlerChrysler AG
    Inventors: Dietmar Hartmann, Peter Maly, Karl Pfahler, Lothar Renner, Ina Von Szczepanski
  • Publication number: 20080315634
    Abstract: A motor vehicle seat, in particular for an open motorcar, having an air supply device for supplying an air flow from an air output opening to the head, neck and shoulder area of a passenger. The air supply device includes a heating or cooling system for heating or cooling the air flow. This air supply device is a more efficient heating or cooling system for a motor vehicle seat. For this purpose, the air supply device comprises a sandwich that includes at least one heating or cooling layer and at least one air penetrable layer and a structure which makes it possible to convert the air flow into turbulent or diffused steam.
    Type: Application
    Filed: July 21, 2006
    Publication date: December 25, 2008
    Applicant: DAIMLER AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner, Dirk Weisser
  • Publication number: 20080300749
    Abstract: An air supply mechanism for a vehicle seat comprises a control device for driving a fan and a heating element connected downstream of the fan. When the vehicle is unlocked, a vehicle door is opened and/or a folding-top switch is actuated in order to open the folding-top, the control device causes a heating element to be preconditioned. When there is a switching-on signal for the air supply mechanism, the control device ends the preconditioning and switches on the heating element and the fan. The heating element and fan are subsequently regulated by the control device as a function of vehicle speed and external temperature. In this manner, a seat occupant does not experience an initial draft or a delayed switching-on reaction but rather experiences a pleasant warmth even immediately after the air supply mechanism is switched on.
    Type: Application
    Filed: June 18, 2005
    Publication date: December 4, 2008
    Applicant: DaimlerChrysler AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20080191520
    Abstract: An air supply mechanism for a vehicle seat has an air discharging opening which is provided in the upper region of the vehicle seat and via which the head, shoulder, and neck region of a seat occupant can be subjected to an airflow in order to reduce undesirable draft phenomena. The airflow can be regulated with a control device, by regulating a blower speed of a fan, and can be heated via a heating element. The heating element has three heating stages which can be selected by a manually setting a regulating device by the seat occupant in order to select a heating stage and/or by the control device in response to an external parameter value. It is possible for the control device to regulate the blower speed of the fan in response to a further external parameter value. This construction makes it possible for the sensation of heat experienced by the seat occupant to be taken into account in the elimination of a sensation of a draft.
    Type: Application
    Filed: June 17, 2005
    Publication date: August 14, 2008
    Applicant: DAIMLER AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20080136221
    Abstract: The present invention discloses an air supply mechanism for a vehicle seat (12), and a method for the operation thereof. The air supply mechanism comprises a control device (24), for driving a fan (38) and a heating element (39) connected downstream of the fan (38). When the air supply mechanism is switched on, the control device (24) switches on a heating element (39) and at the same time carries out a starting control of a fan (38) in such a manner that the fan (38) starts and is operated at minimum blower speed for a predetermined period of time before the blower speed is raised to a predetermined working point and subsequently the blower speed is regulated as a function of the driving speed. In this manner, a seat occupant does not experience an initial sensation of draft due to a powerful discharge of relatively cold air but rather experiences a pleasant warmth even directly after the mechanism is switched on.
    Type: Application
    Filed: June 18, 2005
    Publication date: June 12, 2008
    Applicant: DAIMLERCHRYSLELR AG
    Inventors: Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20070018369
    Abstract: An implement for lawn and garden care includes a housing, a drive, and a handle attached to the housing with a vibration damping arrangement. The damping arrangement includes an at least partially elastic damping element. The stiffness of the damping element is determined by its cross section that includes at least one cavity or recess.
    Type: Application
    Filed: June 16, 2006
    Publication date: January 25, 2007
    Inventors: Dietmar Hartmann, Wolfgang Nowack, Franz Joseph
  • Publication number: 20060267383
    Abstract: An air supply device for an automotive seat includes an air duct which is arranged at the delivery side of a fan and has at least one air outlet opening provided in the upper region of the seat for supplying the head, shoulder and neck region of a seat occupant with a flow of air. A heating element is arranged in the air duct between the fan and the air outlet opening, and the air supply device has at least one sensor for detecting a parameter value as a function of which the flow of air emerging from the air outlet opening is controlled. In order to provide the air supply device with a flow of air which can be controlled in a more universal manner, the sensor is arranged inside the air duct between the air outlet opening and the heating element.
    Type: Application
    Filed: February 26, 2004
    Publication date: November 30, 2006
    Inventors: Claudio Bargheer, Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20060261645
    Abstract: An air supply device for a vehicle seat has an air channel arranged on the pressure side of a blower. The channel comprises at least one air discharge opening provided in the upper region of the seat for supplying the head, shoulder and neck area of an occupant of the seat with an adjustable airflow. A heating element is arranged in the air channel between the blower and the air discharge opening. In order to provide the air supply device with an airflow of which feels more comfortable to the occupant of the seat, a grid element is arranged inside the air channel between the air discharge opening and the heating element. As a result, the airflow emerging from the air discharge opening is homogenized and slowed down, and this slowing-down allows more heat to be transferred to the airflow from the heating element.
    Type: Application
    Filed: February 25, 2004
    Publication date: November 23, 2006
    Inventors: Claudio Bargheer, Dietmar Hartmann, Lothar Renner
  • Patent number: 7075034
    Abstract: An air supply device is provided for a vehicle seat of an open-top motor vehicle having at least one air outflow opening which is provided in the upper region of the vehicle seat and via which an airstream can be applied to the head area, shoulder area and nape area of the sitting vehicle occupant in order to reduce undesired draft phenomenon. The airstream can be regulated by way of a control device. In order to provide improved comfort for the sitting vehicle occupant when driving with the top open, the airstream is adjusted, when the air supply device is switched on, by way of the control device as a function of an automatically sensed external parameter value or of a predefined value selectable by the sitting vehicle occupant, to an assigned basic value, starting from which the further adjustment of the airstream is carried out as a function of an automatically sensed further parameter value.
    Type: Grant
    Filed: April 26, 2003
    Date of Patent: July 11, 2006
    Assignee: DaimlerChrysler AG
    Inventors: Claudio Bargheer, Dietmar Hartmann, Karl Pfahler, Lothar Renner
  • Publication number: 20050238339
    Abstract: Air supply device is provided for a vehicle seat of an open-top motor vehicle having at least one air outflow opening which is provided in the upper region of the vehicle seat and via which an airstream can be applied to the head area, shoulder area and nape area of the sitting vehicle occupant in order to reduce undesired draught phenomenon. The airstream can be regulated by means of a control device. In order to provide improved comfort for the sitting vehicle occupant when driving with the top open, the airstream is adjusted, when the air supply device is switched on, by means of the control device as a function of an automatically sensed external parameter value or of a predefined value selectable by the sitting vehicle occupant, to an assigned basic value, starting from which the further adjustment of the airstream is carried out as a function of an automatically sensed further parameter value.
    Type: Application
    Filed: April 26, 2003
    Publication date: October 27, 2005
    Applicant: DAIMLER CHRYSLER AG
    Inventors: Claudio Bargheer, Dietmar Hartmann, Karl Pfahler, Lothar Renner