With Time Control Patents (Class 210/89)
  • Single needle alternating flow blood pump system
    Patent number: 4063554
    Abstract: A blood pump system, typically employed in dialysis, includes a blood pump for withdrawing blood via a single hypodermic needle and valve means operated in synchronism therewith for returning treated blood via the same hypodermic needle. The operation of the blood pump is cyclically interrupted and the valve means opened for the alternate withdrawal and return of blood.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: December 20, 1977
    Inventors: Charles B. Willock, Roger E. Wood
  • Removal of grease and oil from particulate bed granules by backwashing with a detergent
    Patent number: 4032443
    Abstract: Filtering solids from waste water liquids and cleaning, degreasing and restoring the filtering media through the use of cleaning compounds forced up through the filtering substances.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: June 28, 1977
    Assignee: Sterling Drug Inc.
    Inventor: David S. Ross