×

Equipment for protecting personnel from contamination

  • US 4,741,332 A
  • Filed: 09/19/1985
  • Issued: 05/03/1988
  • Est. Priority Date: 02/15/1984
  • Status: Expired due to Term
First Claim
Patent Images

1. Protective breathing equipment comprising:

  • breathing mask means for donning by a wearer;

    protective hood means for wearing over and encompassing the head of the wearer and the breathing mask and for preventing entrance of ambient air and overpressurizing;

    a positive pressure type demand regulator having a housing provided with an inlet adapted for connection with a source of pressurized breathing gas, an outlet connected to said breathing mask and pressure regulating means in said housing for controlling flow of pressurized breathing gas from said inlet to said outlet,case means surrounding said housing and defining therewith a space surrounding said housing, andmeans for supplying said hood and said surrounding space with filtered air under a pressure higher than ambient pressure,said housing being provided with an inlet communicating said surrounding space and said pressure regulating means for delivering dilution air to be mixed with said breathing gas.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×