Patents by Inventor David G. Blaker

David G. Blaker 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).

  • Switch apparatus responsive to distortion
    Patent number: 4565910
    Abstract: An improved switch apparatus for monitor presence of the patient in a hospital or nursing home bed and responsible to distortion by the weight of the patient, the switch being formed of an elongated, thin rectangular base member of insulating, flexible material having an elongated generally rectangular cutout in it, a first and second plastic cover members encompassing the base member, the plastic cover members being sealed around the edges and the plastic cover members having conductive layers affixed to the opposed surfaces on either side of the base member and arranged so that the conductive layers are spaced apart from each other in the area of the cutout and held apart by the memory of the base and plastic covers and a cable having one conductor connected to the conductive layer on one cover member and another conductor connected to the conductive layer on the other cover member, the conductive surfaces contacting each other through the cutout in the base member when the switch apparatus is subject to be
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: January 21, 1986
    Assignee: Bed-Check Corporation
    Inventors: Jeff L. Musick, Robert D. Blaker, David G. Blaker
  • Switch apparatus responsive to pressure or distortion
    Patent number: 4484043
    Abstract: An apparatus for monitoring the presence of a patient in a hospital bed including an elongated, thin, generally rectangular base member of insulating flexible material, such as high-density polyethylene foam, having a generally rectangular cutout opening therein, a rectangular, thin, electrically conductive member affixed to each surface of the base, the base serving to normally maintain the conductive elements spaced apart from each other, a plastic cover cemented to the exterior surface of each of the conductive elements, the edges of the plastic cover being sealed around the full periphery of the device, a cable having two conductors, one conductor being attached to each of the conductive members, the device being generally about 4 inches wide and 34 inches long so that it may be positioned under a patient in a hospital bed, the weight of the patient serving to distort the device so that the conductive members are in contact, providing a closed signal, and the device being sufficiently rigid so that in the
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: November 20, 1984
    Assignee: Bed-Check Corporation
    Inventors: Jeff L. Musick, Robert D. Blaker, David G. Blaker, Jr.