Patents Assigned to Hydraulic Concepts
  • Variable delivery pump
    Patent number: 5224839
    Abstract: Variability of the output of a pump is achieved in a power efficient manner by forcing fluid through a check valve while intermittently shunting the pump's output side to is input side. A diverter valve is employed for this purpose wherein a perforated valve cylinder is rotated within a perforated sleeve. By controlling the axial position of the valve cylinder, the amount of overlap of the two component's perforations is variable and thereby serves to control the delivered output.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: July 6, 1993
    Assignee: Hydraulic Concepts
    Inventor: Joseph S. Cardillo