×

Automatic safety valve and diffuser for nasal and/or oral gas delivery mask

  • US 5,438,981 A
  • Filed: 09/30/1993
  • Issued: 08/08/1995
  • Est. Priority Date: 09/30/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus adapted for use with respiratory equipment, said apparatus comprising, in combination:

  • a self-regulating valve device comprising;

    a housing including a primary inlet adapted for connection to a source of pressurized gas, a secondary inlet in communication with an ambient atmosphere, and an outlet; and

    a substantially rigid valve element and means for pivotally mounting said valve element within said housing, said valve element being operable to open said primary inlet and close said secondary inlet in the presence of a flow of pressurized gas from said pressurized gas source and to open said secondary inlet and close said primary inlet in the absence of said flow of pressurized gas, said valve element comprising a closure portion dimensioned to cover said primary and secondary inlets and means for counterbalancing said closure portion with respect to said pivotally mounting means; and

    a gas diffuser element comprising;

    means for receiving said outlet;

    means for sealing a region surrounding an inlet of a respiratory mask from an ambient atmosphere; and

    means for diffusing a flow of gas discharged by said outlet.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×