Patents by Inventor C. David Cawood

C. David Cawood 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).

  • Publication number: 20040230181
    Abstract: An apparatus and method for collecting urine from an incontinent person including a condom catheter fluidly coupled to the inlet of a urine pump, with the outlet of the pump fluidly coupled to a urine collection bag suspended about the person's abdomen by an integral strap. The pump is fastened to the strap adjacent to the urine bag. The pump mechanism has a resilient flexible tubular section that is provided with inlet and outlet check valves and functions by displacing liquid present within the tubular section by physically deforming the tubing. A cam, driven by a solenoid, causes a crimping of the tubular section which expels fluid through pump discharge. When the force causing physical deformation is released, the resilient tubular section returns to its original shape, providing a suction at the pump inlet.
    Type: Application
    Filed: May 14, 2004
    Publication date: November 18, 2004
    Applicant: Cawood Family Limited Partnership
    Inventor: C. David Cawood
  • Patent number: 6736803
    Abstract: This bag includes an improvement in the form of an extendable drain tube that is normally retracted and retained in flat coiled condition against the front wall of the bag. The tube is biased into its coiled condition by the elastic memory of the thermoplastic material from which it is formed and, in a preferred embodiment, the flat coil is oval-shaped with its major axis extending generally vertically when the bag is worn. A retention strap attached to the front wall of the bag serves to hold the drain tube in its coiled condition against the bag's front wall. A valve is located at a distal end of the drain tube, which is used to control drainage. The location of the valve prevents spillage of residual urine upon recoil of the drain tube.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: May 18, 2004
    Assignee: Cawood Family Limited Partnership
    Inventor: C. David Cawood
  • Publication number: 20030032944
    Abstract: A urine collection bag having the basic features appearing in U.S. Pat. No. 4,449,971 is disclosed. The bag also includes an improvement in the form of an extendable drain tube that is normally retracted and retained in flat coiled condition against the front wall of the bag. The tube is biased into its coiled condition by the elastic memory of the thermoplastic material from which it is formed and, in a preferred embodiment, the flat coil is oval-shaped with its major axis extending generally vertically when the bag is worn. A retention strap attached to the front wall of the bag serves to hold the drain tube in its coiled condition against the bag's front wall. A valve is located at a distal end of the drain tube, which is used to control drainage. The location of the valve prevents spillage of residual urine upon recoil of the drain tube.
    Type: Application
    Filed: September 11, 2002
    Publication date: February 13, 2003
    Applicant: CAWOOD FAMILY LIMITED
    Inventor: C. David Cawood