Patents by Inventor Alfred Memmel

Alfred Memmel 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: 10508704
    Abstract: An air spring for a motor vehicle having a rolling bellows filled with gas under pressure, one end of the rolling bellows is connected to a load receiver and the other end is fastened to a roll-off piston?. The load receiver and the roll-off piston are moveable relative to one another depending on a force impinging on the load receiver toward the roll-off piston. A sensor device is arranged inside the rolling bellows by which a distance between the load receiver and the roll-off piston is detected. A pressure piece extending in direction of the roll-off piston is arranged at the load receiver and a sensor body is movably drivable along a sensor track of the sensor device by an end region of the pressure piece facing the roll-off piston. The sensor device generates an electric signal corresponding to the position of the sensor body on the sensor track.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: December 17, 2019
    Assignee: ZF Friedrichshafen AG
    Inventors: Thomas Nowotka, Alfred Memmel, Georg Memmel
  • Publication number: 20180216689
    Abstract: An air spring for a motor vehicle having a rolling bellows filled with gas under pressure, one end of the rolling bellows is connected to a load receiver and the other end is fastened to a roll-off piston’. The load receiver and the roll-off piston are moveable relative to one another depending on a force impinging on the load receiver toward the roll-off piston. A sensor device is arranged inside the rolling bellows by which a distance between the load receiver and the roll-off piston is detected. A pressure piece extending in direction of the roll-off piston is arranged at the load receiver and a sensor body is movably drivable along a sensor track of the sensor device by an end region of the pressure piece facing the roll-off piston. The sensor device generates an electric signal corresponding to the position of the sensor body on the sensor track.
    Type: Application
    Filed: August 1, 2016
    Publication date: August 2, 2018
    Inventors: Thomas NOWOTKA, Alfred MEMMEL, Georg MEMMEL
  • Patent number: 7987737
    Abstract: A sensor holder for a piston-cylinder unit with a cylinder and a piston rod which is movable relative to the latter comprises a holding element which carries out a synchronous movement with respect to the piston rod and has a first position measuring device. A second position measuring device is held by a holder so as to be axially stationary with respect to the cylinder, and there is a rotationally oriented installation position between the first position measuring device and second position measuring device. The cylinder-side holder and the holding element are rotatable relative to one another, and a magnetic force acting between the holder and the holding element brings about a rotational orientation of the two position measuring devices relative to one another.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: August 2, 2011
    Assignee: ZF Friedrichshafen AG
    Inventors: Alfred Memmel, Thomas Nowotka
  • Publication number: 20090064804
    Abstract: A sensor holder for a piston-cylinder unit with a cylinder and a piston rod which is movable relative to the latter comprises a holding element which carries out a synchronous movement with respect to the piston rod and has a first position measuring device. A second position measuring device is held by a holder so as to be axially stationary with respect to the cylinder, and there is a rotationally oriented installation position between the first position measuring device and second position measuring device. The cylinder-side holder and the holding element are rotatable relative to one another, and a magnetic force acting between the holder and the holding element brings about a rotational orientation of the two position measuring devices relative to one another.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 12, 2009
    Applicant: ZF Friedrichshafen AG
    Inventors: Alfred Memmel, Thomas Nowotka
  • Publication number: 20060097434
    Abstract: Pneumatic spring comprises a rolling bellows, one end of which is attached to a connector part. The connector part has a profiling, which cooperates with a clamping ring to hold the rolling bellows in position. The profiling is in the form of a shoulder, against the axial surface of which the rolling bellows rests, where the rolling bellows is deformed axially by the clamping ring onto a radial clamping surface.
    Type: Application
    Filed: November 9, 2005
    Publication date: May 11, 2006
    Inventors: Alfred Memmel, Christine Markert-Hess, Thomas Nowotka, Matthias Planitzer, Horst Drescher
  • Patent number: 6581734
    Abstract: Damping valve comprising a damping valve body with at least one flow-through channel, the outlet of which is covered at least by an elastic valve disk, which is pretensioned against the damping valve body at least indirectly by a spring, where at least one support disk of smaller diameter is provided on the elastic valve disk, facing the spring, this support disk not executing any elastic movement, the spring exerting its force in the area radially outside the support disk.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: June 24, 2003
    Assignee: ZF Sachs AG
    Inventors: Steffen Heyn, Andreas Sieber, Robert Moller, Alfred Memmel
  • Publication number: 20020175033
    Abstract: Damping valve comprising a damping valve body with at least one flow-through channel, the outlet of which is covered at least by an elastic valve disk, which is pretensioned against the damping valve body at least indirectly by a spring, where at least one support disk of smaller diameter is provided on the elastic valve disk, facing the spring, this support disk not executing any elastic movement, the spring exerting its force in the area radially outside the support disk.
    Type: Application
    Filed: May 21, 2002
    Publication date: November 28, 2002
    Applicant: ZF Sachs AG
    Inventors: Steffen Heyn, Andreas Sieber, Robert Moller, Alfred Memmel