Gas mask

Patent metadata

Field	Value
Publication number	US-10173084-B2
Application number	US-201213492048-A
Country	US
Kind code	B2
Filing date	Jun 8, 2012
Priority date	Apr 10, 2012
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A gas mask is provided with a mask body, which is designed to cover the face of a user, and with an opening in the mask body, which is closed by a speech diaphragm (8) in a gas-tight manner. A funnel (4) is directed toward the speech diaphragm with an opening angle in the range of 20° to 90°. The funnel (4) is arranged in front of the speech diaphragm in the interior space of the mask body in order to focus sound waves onto the speech diaphragm.

First claim

What is claimed is:

1. A gas mask comprising:
a mask body, which is designed to cover the face of a user, and with an opening in the mask body;
a speech diaphragm closing said opening in the mask body in a gas-tight manner; and
a funnel directed towards said speech diaphragm with an opening angle in a range between 20° and 90°, said funnel having a funnel opening at one end thereof, said speech diaphragm closing said funnel opening at said one end of said funnel, said funnel being arranged in front of said speech diaphragm in an interior space of the mask body in order to focus sound waves onto said speech diaphragm, wherein said funnel comprises an upper circumferential area and a lower circumferential area, said upper circumferential area and said lower circumferential area extending less from said speech diaphragm than laterally adjacent side portions, whereby each of said laterally adjacent side portions is located between said upper circumferential area and said lower circumferential area, said upper circumferential comprising a nose engaging surface configured for engaging a nose of the user and said lower circumferential axial comprising an adjacent mouth engaging surface configured for engaging an area adjacent to the mouth of the user.

2. A gas mask in accordance with claim 1 , wherein said funnel opening faces said speech diaphragm, said diaphragm having a size equal to a size of said funnel opening to fully cover said funnel opening in a gas-tight manner without said diaphragm extending beyond a contour of said funnel opening, said speech diaphragm being arranged in said funnel opening, said opening angle of said funnel being between 30° and 50°, said funnel having a first end portion and a second end portion, said first end portion defining said funnel opening, said second end portion defining a second end portion opening, said funnel opening being in communication with said second end portion opening and said interior space of the mask body, wherein said funnel extends from a proximal end adjacent to said speech diaphragm wider towards distal ends of said upper circumferential area, said lower circumferential area and said laterally adjacent side portions.

3. A gas mask in accordance with claim 1 , wherein said funnel is connected to a frame at or adjacent to said funnel opening facing the speech diaphragm, said frame holding said speech diaphragm in a tensioned manner, said speech diaphragm being arranged in said funnel opening.

4. A gas mask in accordance with claim 3 , wherein said frame is made in one piece with said funnel.

5. A gas mask in accordance with claim 1 , further comprising a protective grid, wherein:
said funnel opening faces the speech diaphragm; and
said protective grid is arranged in said funnel opening.

6. A gas mask in accordance with claim 5 , wherein said protective grid has a plurality of ring elements, which are located concentrically in the funnel opening facing said speech diaphragm and which are held by a plurality of radially extending web elements in the funnel opening facing said speech diaphragm.

7. A gas mask in accordance with claim 5 , wherein said protective grid is formed by a plurality of web elements, which divide the funnel opening facing said speech diaphragm into a plurality of honeycombed openings.

8. A gas mask in accordance with claim 7 , wherein all of said honeycombed openings have the same size, which is in the range of 10 mm 2 to 100 mm 2 .

9. A gas mask in accordance with claim 1 , wherein said funnel is made of a plastic material with a Shore A hardness of 30 to 80.

10. A gas mask in accordance with claim 9 , wherein said funnel is made of a plastic material with a Shore A hardness of 45 to 65.

11. A gas mask in accordance with claim 1 , wherein a diameter of said funnel increases in a direction of said interior space of the mask body, said first circumferential area comprising a first circumferential area proximal end and a first circumferential distal end, said first circumferential area proximal end and said first circumferential distal end defining a first circumferential area extent, said first circumferential distal end being located at a spaced location from said first circumferential area proximal end, said second circumferential area comprising a second circumferential area proximal end and a second circumferential distal end, said second circumferential area proximal end and said second circumferential distal end defining a second circumferential area extent, said second circumferential distal end being located at a spaced location from said second circumferential area proximal end, each of said laterally adjacent side portions comprising a laterally adjacent side portion proximal end and a laterally adjacent side portion distal end, said laterally adjacent side portion proximal end and said laterally adjacent side portion distal end defining a laterally adjacent side portion extent, said laterally adjacent side portion distal end being located at a spaced location from said laterally adjacent side portion proximal end, said laterally adjacent side portion extent being greater than said first circumferential area extent and said second circumferential area extent, said first circumferential area proximal end, said second circumferential area proximal end and said laterally adjacent side portion proximal ends defining said funnel opening, said speech diaphragm being arranged in said funnel opening.

12. A gas mask in accordance with claim 1 , wherein said upper circumferential area, said lower circumferential area and said laterally adjacent side portions are integrally connected to each other to form a one-piece funnel and said one-piece funnel is adapted to surround a mouth area and a nose area of the user, said funnel opening defining a speech diaphragm opening, said speech diaphragm being arranged in said speech diaphragm opening.

13. A gas mask comprising:
a mask body having an exterior side and a user face engaging side providing a user interior space and having an opening passing through the mask body from the exterior side to the user face engaging side;
a speech diaphragm closing said opening in the mask body in a gas-tight manner; and
a funnel part with a funnel opening end defining a funnel opening and a wall extending from said funnel opening end to a funnel interior end, a straight line mean tangent slope at an inner wall surface and a straight line mean tangent slope at a diametrically opposed inner wall surface forming a wall angle in a range between 20° and 90°, said funnel part being arranged adjacent to said speech diaphragm and said wall extending into said user interior space of the mask body to focus sound waves from said interior space onto said speech diaphragm, said speech diaphragm closing said funnel opening at said funnel opening end, said funnel part being arranged directly adjacent to a user nose area and a user mouth area, said funnel part comprising a first circumferential area, a second circumferential area and laterally adjacent side portions, said first circumferential area, said second circumferential area and said laterally adjacent side portions extending in a direction away from said speech diaphragm, each of said laterally adjacent side portions being arranged adjacent to said first circumferential area and said second circumferential area, wherein an extent of said first circumferential area from said speech diaphragm and an extent of said second circumferential area from said speech diaphragm is shorter than an extent of said laterally adjacent side portions from said speech diaphragm, one of said laterally adjacent side portions comprising said inner wall su

Assignees

• Feil Dirk
• Lange Werner
• Schmidt Christoph
• Volmer Achim
• Weisgerber Martin
• Draeger Safety Ag & Co Kgaa

Inventors

• Feil Dirk
• Lange Werner
• Schmidt Christoph
• Volmer Achim
• Weisgerber Martin

Classifications

• A62B18/02 Primary

  Masks (gas-masks for animals A62B18/06; masks for welders A61F9/06) · CPC title

• A62B18/08

  Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices (eye-pieces for protective goggles A61F9/02; composition of materials for the windows or other transparent parts A62D7/00) · CPC title