Patents by Inventor John Frederick Ward

John Frederick Ward 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: 5886299
    Abstract: This invention relates to an inlet valve assembly for central vacuum systems. In particular, this invention relates to an inlet valve assembly including an inlet face plate, a mounting plate, having a deformable mounting flange, and an electrical receptacle integrally formed with a high voltage wire. In some uses, the inlet valve assembly also can include a low voltage wire which can be used to complete a low voltage circuit to initiate a central vacuum motor. The mounting plate can accommodate the electrical receptacle in a temporary position and the inlet face plate can rear mount the receptacle into a locked position where the receptacle is securely attached to the inlet face plate. In this manner, the receptacle may be mounted to the inlet face plate even though one end of the high voltage wire is already wired into an electrical box.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: March 23, 1999
    Assignee: Canplas Industries, Ltd.
    Inventor: John Frederick Ward
  • Patent number: 5664375
    Abstract: An exterior ventilation device having a main body with an upstanding perimeter wall and an attachment flange extending outwardly from the upstanding perimeter wall. A plurality of louvers extend across the body adjacent to the other end of the perimeter wall each of the louvers being sloped downwardly and outwardly. A trim ring is attachable to the main body and defines a cavity between the attachment flange and the skirt of the trim ring into which siding may be inserted. The body is provided with a water directing rib to direct any water running down the body from the back of the body towards the front of the body and thus outside of any cladding material located in the cavity between the trim ring and the attachment flange. In one embodiment the water directing feature is a rib and in another embodiment the feature is a groove.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 9, 1997
    Assignee: Canplas Industries, Ltd.
    Inventor: John Frederick Ward