Patents by Inventor Hannibal, Wilhelm

Hannibal, Wilhelm 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).

  • Valve-controlled internal combustion engine
    Patent number: 5144921
    Abstract: A valve-controlled internal combustion engine has an device 13 for adjusting the camshaft 2 relative to its timing gear 14. The adjusting device has an operating sleeve, which is interlocked over different gear systems, on the one hand, with the timing gear and, on the other, with the camshaft, and a hydraulic adjusting piston, which can be acted upon on both sides. Pressure is caused to act upon the adjusting piston by means of the engine oil, which is circulating under pressure and which is branched off before a restrictor 11 in the inflow to the bearings 12 in the cylinder head 2 of the internal combustion engine. By these means, the full pressure of the lubricating pump 7 can be used to shift the operating sleeve.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: September 8, 1992
    Assignee: Audi, A.G.
    Inventors: Richard Clos, Hannibal, Wilhelm, Fred Schafer, Norbert Sudhaus