Patents by Inventor Jens Schäfer

Jens Schäfer 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).

  • Device for varying timing of gas exchange valves of internal combustion engines, particularly a vane-type camshaft adjusting device
    Patent number: 6186103
    Abstract: A vane-type camshaft adjusting device for an internal combustion engine, with a drive pinion (2) connected in driving relationship to a crankshaft, and a winged wheel (7) connected rotationally fast to a camshaft. The drive pinion (2) a hollow space (6) which is defined by a circumferential wall (3) and two side walls (4, 5), into which hollow space (6) is inserted the winged wheel (7) having at least two wings (9) on its wheel hub (8). Limiting walls (10) define at least two working chambers (14) in the hollow space (6) of the drive pinion (2), and each of these working chambers (14) is divided into two hydraulic pressure chambers (18, 19) by one of the wings (9) of the winged wheel (7). The limiting walls (10) of the drive pinion (2) are in sealing contact by axial sealing strips (13) with the wheel hub (8) of the winged wheel (7), while the wings (9) of the winged wheel (7) are in sealing contact by axial sealing strips (17) with the circumferential wall (3) of the drive pinion (2).
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: February 13, 2001
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Jens Schäfer, Manfred Schindler