Patents Assigned to Hargraves Aerobic Systems, Inc.
  • Rotary low pressure air displacement pump
    Patent number: 4179244
    Abstract: A low pressure air displacement pump including one or more cylinders or bellows powered by rotary or reciprocating motivation means. This device employs two or more bellows radially disposed and activated by a singular rotary source of power which imparts a cranking motion to connecting rods affixed to the bellows, which, in turn supply individual conduits with equal or varying amounts of displaced air, in accordance with the particular sizes of the individual bellows.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: December 18, 1979
    Assignee: Hargraves Aerobic Systems, Inc.
    Inventor: Elwood Marple