Patents Examined by Denis L. Ferensic
  • Apparatus for varying the flow area of a conduit
    Patent number: 6119723
    Abstract: An apparatus (10) for varying the flow area of a conduit (12). The apparatus comprises a flap (14) mounted in said conduit (12) which is off-center pivotally mounted to pivot in response to flow of fluid (F) through said conduit (12). The apparatus (10) also includes biasing means associated with the flap to rotationally urge the flap against the action of the flow (F).
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: September 19, 2000
    Assignee: ResMed Limited,
    Inventor: Barton John Kenyon