Gas mask structure

  • US 6,435,184 B1
  • Filed: 09/01/2000
  • Issued: 08/20/2002
  • Est. Priority Date: 09/01/2000
  • Status: Expired due to Fees
First Claim
Patent Images

1. A gas mask structure comprising:

  • a rear cup body having opposing front and rear ends, the rear end having an opening formed therein for receiving a portion of a user'"'"'s face therein, the opening in the rear end of the rear cup body having a peripheral portion with a soft rubber sealing pad affixed thereto, the front end of the rear cup body having a vertically directed guide way with an inlet opening formed at one end thereof in open communication with the opening of the rear end of the rear cup body, the front end of the rear cup body having an inclined wall portion with an outlet opening formed therethrough with a check membrane overlaying the outlet opening;

    a pair of cell seats respectively disposed on opposing sides of the rear cup body and forming an air exit therebetween for discharging air from the outlet opening, each cell seat having a recessed receiving chamber for receiving at least one cell therein, each cell seat having an outer cover forming a closure for the recessed receiving chamber thereof;

    a retaining seat disposed between the pair of cell seats and spaced from the air exit;

    a motor disposed in the retaining seat and powered by cells within the pair of cell seats, the motor having a shaft extending into the guide way of the front end of the rear cup body;

    a charging seat disposed in the retaining seat;

    a power switch disposed in the retaining seat and for controlling power from the cells in the pair of cell seats;

    a front cup body having opposing front and rear ends, the rear end of the front cup body being affixed to the front end of the rear cup body and having a through hole in open communication with the guide way, the front end of the front cup body being formed with a circular fixing seat;

    a circular activated carbon filter body positioned in the fixing seat;

    a ring-shaped cover body being releaseably coupled to the fixing seat, the cover body including an annular flange for retaining the activated carbon filter body within the fixing seat;

    a second filter overlaying the activated carbon filter body, the second filter having a filter layer formed of one of an unwoven fabric or a folded fiber filter paper, the second filter having a protective cover on one end thereof and an annular flange on an opposing end, the annular flange of the second filter being captured under the annular flange of the cover body; and

    , a fan disposed in the guide way of the front end of the rear cup body in alignment with the through hole of the front cup body, the fan being coupled to the shaft of the motor to be rotatably driven thereby for generating an air flow through the second filter, the activated carbon filter body, the through hole of the front cup body, guide way and then through the inlet opening to be inhaled by the user.

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