Patents by Inventor Hans-Jurgen Riggenmann

Hans-Jurgen Riggenmann 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).

  • Reciprocating pump for the pulsation-free delivery of a liquid
    Patent number: 4359312
    Abstract: A piston pumping system is disclosed having a pair of piston pumps operated by plungers with roller follows which ride in rotary cam plate grooves. The grooves are arranged such that the delivery of each pump overlaps the suction of the other pump. Means are provided to sense any pulsations in pressure to change the cam speed during the precompression phase of operation and means are provided to sense delivery pressure and to adjust cam plate speed during the interval between the initial phase of delivery and the end of the precompression stroke.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: November 16, 1982
    Assignee: Zumtobel KG
    Inventors: Herbert Funke, Hans-Jurgen Riggenmann