Patents Assigned to Lawrence E. Johnson
  • Aerator
    Patent number: 4057372
    Abstract: An aerator for a spa is made of a section of pipe mounted to a base having an axially directed output fitting. A blower oriented axially of the pipe is mounted near the base in an annular mounting and sealing ring, and one or more additional blowers may be mounted to provide a series of blower stages all axially aligned with one another along the pipe. A solid body of porous foam having a through aperture fills the pipe above the first of the blowers and a cover is detachably connected to the top of the pipe section housing.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: November 8, 1977
    Assignee: Lawrence E. Johnson
    Inventors: Lawrence E. Johnson, William W. Conger, IV