Patents by Inventor Walter Mittermeier

Walter Mittermeier 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).

  • Guide rail for drive chains
    Patent number: 4832664
    Abstract: A guide rail, and method of making same, for the guiding and/or tightening of chains that are used in internal-combustion engines, for example, for driving camshafts, auxiliaries or the like is disclosed. For reasons concerning weight and manufacturing, the guide rail consists of a plastic material and is formed by a slideway lining body and a carrier. Both the carrier and the slideway lining body are produced in a progressive manufacturing cycle and are interconnected via one or several dovetailed connections.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: May 23, 1989
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventors: Klaus Groger, Walter Mittermeier, Robert Binder, Volker Diehm
  • Air-cooled multi-cylinder internal combustion engine
    Patent number: 4779588
    Abstract: An air-cooled multi-cylinder internal combustion engine in which cooling air flows through a cylinder row transversely to the cylinders. A one-piece deflection part made of light-metal or plastic material and covering all cylinders is arranged as air guide device at the cooling air discharge side.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: October 25, 1988
    Assignee: Dr. Ing. h.c.F. Porsche Aktiengesellschaft
    Inventors: Gerhard Ziegler, Karl Gregotsch, Walter Mittermeier
  • Hydraulic chain tensioner
    Patent number: 4507103
    Abstract: A hydraulic chain tightener with a hollow piston longitudinally movably guided within a hydraulic housing; the hollow piston is closed off at the top by a throttling plug and the hydraulic housing is to be vented by way of the channels of the throttling plug; an expansion space is formed between the throttling plug and the pressure space present at the bottom side of the hollow piston, which is closed off with respect to the pressure space by a ball check valve; during chain impacts on the hollow piston and corresponding pressure increases in the pressure space, the check valve opens and enables by pump action a rapid venting of the hydraulic housing.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: March 26, 1985
    Assignee: Dr. Ing. h.c.F. Porsche A.G.
    Inventor: Walter Mittermeier
  • Hydraulic chain tensioner
    Patent number: 4504251
    Abstract: A hydraulic chain tensioner with a hollow piston longitudinally guided in a hydraulic housing which is closed off at the top by a plug provided with an external thread; the plug is pressed into a smooth central bore of the hollow piston and the thread grooves are in communication with the atmospheric air by way of radial channels of the hollow piston, thus permitting a venting of the hydraulic housing; a further venting possibility exists by an excess pressure valve which is built into an ante-chamber disposed parallel to the hollow piston.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: March 12, 1985
    Assignee: Dr. Ing. h.c.F. Porsche A.G.
    Inventor: Walter Mittermeier