Patents by Inventor Willi Rathke

Willi Rathke 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: 4526294
    Abstract: A dispenser for dispensing controlled quantities of liquid from a bottle includes a piston, which is movable in a cylinder and serves to suck and discharge an adjustable quantity of liquid. The cylinder is secured to a valve block, which contains a suction valve and a discharge valve. A cylindrical sleeve surrounds the cylinder and defines an annular clearance therewith. To change the length of the stroke of the piston and the quantity of liquid which is to be sucked and discharged depends on the stroke length, an adjustable stop and a fixed stop, which is engageable with the adjustable stop and are accommodated in the clearance.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: July 2, 1985
    Assignee: Glasgeratebau Hirschmann
    Inventors: Adolf M. Hirschmann, Klaus Kaser, Hans Rieker, Hans-Peter Busch, Willi Rathke, Heinz P. Maul