Patents by Inventor John Tracey Scales

John Tracey Scales 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).

  • Assessment of patient support systems
    Patent number: 6220088
    Abstract: A method and equipment for assessing the suitability of support surfaces such as mattresses and chairs is disclosed. The method comprises applying a load to each of two such support surfaces with a first indenter having a given profile and a substantially rigid form and measuring the interface pressure, applying the same load to each said surface with a second indenter having substantially the same profile as said first indenter, but having a viscoelastic form and measuring the interface pressure and deriving information as to the characteristics of the supporting surfaces by comparing said measurements.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: April 24, 2001
    Assignee: RAFT Trustees Limited
    Inventors: John Tracey Scales, Duncan Shirreffs Bain
  • Inflatable support appliance
    Patent number: 3949438
    Abstract: The disclosure relates to a support appliance in the form of a mattress formed from a resilient foam material having interconnecting air transmitting cells, the upper surface of the mattress having at least an impedance to gas flow whilst permitting transmission of water vapour from the outer to the inner side thereof for removal by air flow through the mattress effected by an air pump.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: April 13, 1976
    Inventor: John Tracey Scales