GB2266247A

GB2266247A - Gas mask device

Info

Publication number: GB2266247A
Application number: GB9208372A
Authority: GB
Inventors: Kuo-Jen Chen
Original assignee: CHEN KUO JEN
Current assignee: CHEN KUO JEN
Priority date: 1992-04-16
Filing date: 1992-04-16
Publication date: 1993-10-27
Anticipated expiration: 2012-04-16
Also published as: GB9208372D0; GB2266247B

Abstract

A gas mask device comprised of a goggles 1 worn around the upper pan of the head to protect the eyes and detachably connected to a mask 2 worn around the lower part of the head to eliminate poisonous substances from inhaled air, a chemical filter 26 within the mask, and a detachable wet type chemical air filter can 3 connected to said mask to treat intake air before entering said mask. The goggles has detachable eyepieces so that different lenses can be used according to user's eyesight (Figs 2 and 3). The goggles can be separately used in water sports. The filter 26 is sealed by covering strips (264, Figs 5 and 6) provided with pull wires extending through the mask to facilitate strip removal prior to use. The inlet of the filter can 3 is sealed by a tape 331 before use. In a modifications (Fig 8), the filter can 3 includes a motor-driven fan. <IMAGE>

Description

GAS MASK DEVICE The present invention relates to gas masks, and more particularly, the present invention relates to a gas mask device comprised of a detachable goggles having detachable eyepieces and therefore different lenses can be used according to user's eyesight.

Regular gas masks are generally designed for military use, and comprised of a covering for the head and a dry type chemical air filter can to eliminate poisonous substances from inhaled air. The filter material used in the dry type chemical air filter can has a short service-life and limited function. These gas masks are not easy to put on the head. Furthermore, one's glasses must be taken off before wearing a gas mask. Therefore, these gas masks are not practical to those persons having eyesight problems.

The present invention has been accomplished under the aforesaid circumstances. According to one aspect of the present inventions a gas mask device is generally comprised of a goggles worn around the upper part of the head to protect the eyes, a mask worn around the lower part of the head to eliminate poisonous substances from inhaled air, and a detachable wet type chemical air filter can connected to said mask to treat intake air before entering the mask.

According to another aspect of the present invention, the goggles can be separately used in water sports, and the mask can be separately used in a smoky area. According to still another aspect of the present invention the goggles has detachable eyiaca so that different lenses can be used according to user's eyesight. According to still another aspect of the present invention, different chemical solution can be filled in the wet type chemical air filter can to filtrate different poisonous substances from intake air.

According to still another aspect of the present inventions the wet type chemical air filter can can be put inside the pocket or hung one the belt. According to still another aspect of the present inventions a DC fan is provided in the wet type chemical air filter can to automatically deliver clean air to the mask for taking into the user's lungs.

According to still another aspect of the present invention, a handy oxygen can may be alternatively connected to the mask to provide oxygen. According to still another aspect of the present inventions the mask has a chemical air filter bag in a filtration chamber inside a rigid shell thereof behind an air intake chamber, which chemical air filter bag is sealed before use and can be conveniently opened by a pull rope.

An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings in which: Fig. 1 is an elevational view of the preferred embodiment of the gas mask device of the present inventions Fig. 2 is an exploded view of the eyepiece; Fig. 3 is a sectional assembly view of the eyepiece; Fig. 4 is a cross section of the mask showing the internal arrangement of the air filter inside the rigid shell thereof; Fig. 4A is a partly sectional view of the air filter in an enlarged scale; Fig. 5 is an elevational view of the chemical air filter bag; Fig. 6 illustrates that pulling the pull rope causes the covering strips to be removed from the two opposite filtration faces of the chemical air filter bag; Fig. 7 is a cross section of the detachable wet type chemical air filter bag; and Fig. 8 is a cross section of an alternate form of the detachable wet type chemical air filter bag.

Referring to the various drawings attached herewith, a detailed description of the structural features of "Gas Mask Device" of the present invention is as follows: Referring to Fig. 1, therein illustrated is a gas mask device embodying the present invention which is generally comprised of a goggles 1 a mask 2, and a detachable wet type chemical air filter can 3. The goggles 1, which is made from rubber, comprises two eyepieces 11,12 with a bridge 13 connected therebetween, and a head band 14 to be worn around the upper part of the head.

Referring to Figs. 2 and 3 and seeing Fig. 1 again, each eyepiece 11 or 12 comprises a rim 15 to hold a lens 16 by an externally threaded lock ring 17. The rim 15 is covered with a window glass 152, and comprises an inner thread 151. By screwing the externally threaded lock ring 17 into the inner thread 151, the lens 16 is firmly retained inside the rim 15. Further, a rubber seal ring 161 may be mounted on the lens 16 to seal the gap between the lens 16 and the inner thread 151 of the rim 15.

Referring to Figs. 4, 4A, 5 and 6 and seeing Fig.

1 again, the mask 2 is connected to the goggles 1 by connecting straps 21 for covering over the lower part of the head. The mask 2 comprises a rigid shell 22 sealed to the body portion 23 thereof to cover over the mouth and the nose.

and a head band 24 to be worn around the lower part of the head. The rigid shell 2 has an air filter 25 incorporated on the inside. The air filter 25 comprises an air intake port 251 at the bottom, an air intake chamber 253, an one-way valve 252 connected between the air intake port 251 and the air intake chamber 253, a filtration chamber 254 behind the air intake chamber 253, a chemical air filter bag 26 fastened inside the filtration chamber 254 by a screen cap 255 and a rubber ring 256. Therefore, current of air was treated through the chemical air filter bag 26 before having been taken into the user's lungs. The rigid shell 2 further comprises an exhaust port 27 on the bottom thereof behind the air intake port 251, with an one-way valve 271 fastened on the inside. Therefore, exhaled air is guided by the oneway valve 271 to discharge through the exhaust port 27.

Referring to Figs. 5 and 6 again, the chemical air filter bag 26 is packed through the process of vacuum packing, having two opposite filtration faces 261,262 respectively covered by covering strips 264. Each covering strip 264 is attached with a wire 263 around the border thereof. The wires 263 of the covering strips 264 are connected at one end forming into a pull rope extended out of the rigid shell 22 through a through hole 264. Before the use of the gas mask device, the covering strips 264 are removed from the filtration faces 261,262 by pulling the pull rope 263.

Referring to Fig. 7 and seeing Fig. 1 again, the detachable wet type chemical air filter can 3 comprises a threaded outlet port 31 connected to the air intake port 251 of the mask 2 by an air pipe 32 and two connectors 321,322, an air intake port 33, an absorptive cotton 35 on the inside, an air passage way 34, which guides intake air from the air intake port 33 toward the absorptive cotton 35, and a filter bed 351 disposed between the absorptive cotton 35 and the threaded outlet port 31 to eliminate moisture from current of air passing therethrough. Therefore, intake air is guided by the air passage 34 through the absorptive cotton 35 and the filter bed 351 and taken into the user's lungs through the air pipe 32 and the mask 2.Suitable neutralization reagent solution or diluent may be filled into the wet type chemical air filter can 3 and sucked by the absorptive cotton 35 for eliminating certain substances from intake air. Furthermore, the air intake port 33 is sealed by a self-sticking tape 331 before use, and a belt 4 s provided for securing the detachable wet type chemical air filter can 3 to the user's body.

Referring to Fig. 8, therein illustrated is an alternate form of the detachable wet type chemical air filter can 3. In this alternate form, a dry battery set 36 and an induced draft fan 37 are fastened on the inside and controlled by a switch (not shown). The induced draft fan 37 automatically continuously sucks in air through the air intake port 33, the air passage way 34, the absorptive cotton 35 and the filter bed 351, and sends it through the air pipe 32 toward the mask 2. This arrangement helps patient take in fresh air easily.

Claims

CLAIMS:

1. A gas mask device comprising: goggles to be worn around the upper part of the head; a mask to cover the lower part of the head, said mask comprising a rigid shell over the area of the mouth and the nose, said rigid shell comprising an air intake port on a bottom edge thereof. an air intake chamber behind said air intake port. a filtration chamber bid said air intake chamber, a chemical air filter bag placed inside said filtration chamber, and an exhaust port on said bottom edge behind said air intake port;; a chemical air filter detachably connected to said mask, said chemical air filter comprising an air intake port sealed by a detachable strip, an air passage way connected to the air intake port thereof, an outlet port connected to the air intake port on said mask by a flexible air pipe, an absorptive cotton for absorbing dilutent and a moisture eliminating filter bed connected between said air passage way and said outlet port.

2. The gas mask device of claim 1, wherein said goggles comprises two eyepieces, said eyepieces each comprised of an internally threaded rim, a window glass covered on said rim at an inner side, a lens placed inside said rim, and an externally threaded lock ring meshed with said rim to hold said lens in place.

3. The gas mask device of claim 2, wherein said lens is covered with a rubber ring, said rubber ring being to seal the gap between said lens and said rim.

4. The gas mask device of claim 1, wherein said mask is detachabl connected to said goggles by straps.

5. The gas mask device of claim 1, wherein filter bag is fastened inside said filtration chamber by a rubber ring and a screen cap.

6. The gas mask device of claim 1, wherein said chemical air filter bag has two opposite filtration faces respectively covered by covering strips, said covering strips being attached with a pull wire extended out of said rigid shell through a wire hole, pulling said pull wire causing said covering strips to be removed from said filtration faces permitting said chemical air filter bag to be opened into operative condition in the current of air passing therethrough.

7. The gas mask device of claim 1, wherein said chemical air filter can further comprises a dry battery set and an induced-draft fan, sald induced 4raft fan being to suck in air through said diluent absorbed absorptive cotton and said moisture eliminating filter bed. and sends it to the air intake port on said mask.

8. The gas mask device of claim I which further comprises an oxygen can alternatively connected to the air intake port of said mask by a flexible air pipe.

9. A gas mask device substantially as hereinbefore described with reference to, and as illustrated in Figs. I, 2, 3, 4, 4A, 5, 6 and 7 or Figs. 1 to 7 as modified according to Fig. 8 of the accompanying drawings.