Patents by Inventor William R. Swallen

William R. Swallen 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).

  • Air chamber type patient mover air pallet with multiple control features
    Patent number: 5067189
    Abstract: Air chamber-type air pallets incorporate side-to-side linked air pressurized tubes or chambers in two integrated rows, having common members for adjacent chambers under air pressurization rendered rigid over a certain extent to rigidify the air chambers thereof which form load backing chambers in place of rigid backing members conventionally employed in air pallets maintaining the load footprint borne by the air pressurized backing chambers matched by that of the developed air bearing or air film by passage of compressed air through the pattern of perforations. Preferably, linked tubes of one row are laterally offset but integrated physically to those of a second row to both limit lateral shrinkage of linked tubes extending completely across the pin hole perforations within the thin, flexible bottom sheet partially forming such air pallets.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: November 26, 1991
    Inventors: Robert E. Weedling, William R. Swallen, Raynor Johnson, Jack Wegener, David T. Davis
  • Air chamber type patient mover air pallet with multiple control features
    Patent number: RE35299
    Abstract: Air chamber-type air pallets incorporate side-to-side linked air pressurized tubes or chambers in two integrated rows, having common members for adjacent chambers under air pressurization rendered rigid over a certain extent to rigidify the air chambers thereof which form load backing chambers in place of rigid backing members conventionally employed in air pallets maintaining the load footprint borne by the air pressurized backing chambers matched by that of the developed air bearing or air film by passage of compressed air through the pattern of perforations. Preferably, linked tubes of one row are laterally offset but integrated physically to those of a second row to both limit lateral shrinkage of linked tubes extending completely across the pin hole perforations within the thin, flexible bottom sheet partially forming such air pallets.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: July 23, 1996
    Assignee: Robert E. Weedling
    Inventors: Robert E. Weedling, William R. Swallen, Raynor Johnson, Jack Wegener, David T. Davis