Patents by Inventor Donald A. Sievenpiper

Donald A. Sievenpiper 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).

  • System for distributing viscous lubricant
    Patent number: 5285871
    Abstract: A system for distributing measured quantities of viscous lubricant to a plurality of lubricating points. The system includes a plurality of injector cylinders and a container for viscous lubricant. A selectively operable hydraulic fluid pressure supply pump supplies hydraulic fluid to an hydraulic cylinder for pressurizing lubricant in the container at a low pressure to feed lubricant to the injector cylinders, and the fluid pressure supply pump supplies hydraulic fluid at a high pressure to the injector cylinders to feed lubricant to the lubricating points.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: February 15, 1994
    Assignee: Mechanical Tool & Engineering Co.
    Inventor: Donald A. Sievenpiper