Patents by Inventor Douglas D. Cramer

Douglas D. Cramer 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).

  • Patent number: 7470895
    Abstract: A submersible transformer assembly including a housing for holding an electrical transformer and having an aperture in a top panel of said housing for receiving a photocell assembly, the photocell assembly including a photocell positioned above the housing and electrically coupled with a socket held within the aperture by a socket retainer mounted to the underside of the housing top panel below the aperture. A transparent photocell cover or lens is mounted on top of the housing in covering and sealing relationship with the photocell and the aperture. The transformer positioned within the housing is electrically governed by the photocell which switches power to the transformer on and off in response to changes in ambient light conditions.
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: December 30, 2008
    Assignee: Air-O-Lator Corporation
    Inventors: Douglas D. Cramer, Roy L. Watkins
  • Patent number: 5718379
    Abstract: A fountain having a submersible motor and a pump secured to a frame so as to have a relatively low profile such that the entire unit is submersible in a relatively shallow pool. The pump motor is supported at a front end to the frame and along with its shaft generally extends horizontally. The pump is secured to the frame generally in front of the motor. An impeller mounted in a first pump chamber draws water into the first pump chamber through an intake opening on a rear wall of the pump housing. The water is directed out a side of the first pump chamber, through a first pump chamber discharge passageway and back through a pump return passageway and into a second pump chamber. The water is then directed out of the pump housing through a discharge opening on a front wall thereof which is aligned with the intake opening. The water is then directed through a piping assembly which is secured to the front wall of the pump housing.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: February 17, 1998
    Assignee: Air-O-Lator Corporation
    Inventor: Douglas D. Cramer