Patent EP0252052A1 successfully refreshed from Google Patents.
EP0252052A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Inner mask for protective face mask
Assignee: Horda Gummifabrik AB
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Filing: 1987-07-01
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Granted: —
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Expires: 2007-07-01
Abstract
Abstract The present invention relates to an inner mask for protective masks with openings allowing air to flow from the space between protective mask and inner mask. Said openings (6,8) are provided with non-return valves in the form of a compression moulded membrane (7,7') of elastomeric material designed to tightly abut the area surrounding the inner mask (1) thanks to the inherent elasticity of the material.
Inventors
- 👤 Valter Söderberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:56
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
An inner mask for protective masks of the type fitting tightly around the whole face of the wearer, said inner mask being designed to surround the nose and mouth of the wearer and comprising at least one opening provided with a non-return valve for the supply of air from the space between protective mask and inner mask, and an exhalation opening, wherein the non-return valve is formed by a membrane of elastomeric material secured to the inner mask (1) and arranged in closed position to be in sealing contact with the area surrounding the air through-flow opening (6) in the inner mask (1).
Claim 2
Dependent Claim
103 words
An inner mask for protective masks of the type fitting tightly around the whole face of the wearer, said inner mask being designed to surround the nose and mouth of the wearer and comprising at least one opening provided with a non-return valve for the supply of air from the space between protective mask and inner mask, and an exhalation opening, wherein the non-return valve is formed by a membrane of elastomeric material secured to the inner mask (1) and arranged in closed position to be in sealing contact with the area surrounding the air through-flow opening (6) in the inner mask (1).
Claim 3
Dependent Claim
50 words
An inner mask as claimed in claim 1, wherein the membrane is elongate and so secured to the inner surface of the inner mask that it is forming a free end, which covers said opening (6) and is sealing against the area surrounding the opening in the inner mask (1).
Claim 4
Dependent Claim
34 words
An inner mask as claimed in claims 1 - 2, wherein the membrane is compression-moulded to a flat shape and that the inherent elasticity of the material is utilized to effect the sealing abutment.
Claim 5
Dependent Claim
25 words
An inner mask as claimed in claims 1 - 3, wherein the membrane is secured to the inner mask by means of beaded attachment studs.
Claim 6
Dependent Claim
27 words
An inner mask as claimed in claims 1 - 4, wherein the membrane covering the opening is arranged to guide the air entering, towards the respiratory organs.
Claim 7
Dependent Claim
56 words
An inner mask as claimed in claims 1 - 5, wherein air through-flow openings (6, 8) are arranged on each side of the inner mask (1), the membranes covering both air through-flow openings (6, 8) consisting of the free ends (7') of an elongate memhrane (7) of elastomeric material secured between the two openings (at 9).
References Cited (Backward Citations)
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