Sprayable composition using acetone solvent

• US 5,040,530 A
• Filed: 06/25/1990
• Issued: 08/20/1991
• Est. Priority Date: 06/30/1989
• Status: Expired due to Fees

• Current Assignee: Dragerwerk AG
• Original Assignee: Dragerwerk AG
• Inventors: Marquardt, Wolfgang, Bauer, Christoph, Greiff, Rudolf, Rohling, Holmer
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): Funk, Stephen R.
• Application Number:
  US07/543,336
• Time in Patent Office: 421 Days
• Field of Search: 128/206.12, 128/206.28, 128/207.11, 128/205.27, 128/206.14, 128/206.17, 128/206.21, 128/201.22, 128/201.25, 128/201.23 , 128/205.25, 128/201.12, 128/201.14, 128/201.15, 128/201.16, 128/201.17, 128/201.24, 128/206.19, 128/206.22, 128/206.23 , 128/206.24, 128/206.25, 128/206.26, 2/206, 2/5, 2/7, 2/6, 2/9, 2/10
• US Class Current: 128/206.12
• CPC Class Codes: A62B 17/04 Hoods
• CPC Class Codes: A62B 18/025 Halfmasks A62B23/02 takes precedence; surgical face masks A41D13/11

Abstract

A breathing mask with a half mask and a nape band is to be improved such that secure contact of the mask in the entire nose and mouth region of the mask user is ensured by the nape band. The mask is thus effectively prevented from slipping despite the fact that the band is located in the nape region only. An additional application of a hood is possible without providing additional holding members. To accomplish this task, the band can be applied in the form of a rubber-elastic cuff (5) which has a neck opening (6) and a head opening (7). The mask and cuff are preferably made in one piece of silicone rubber, and the hood can additionally be bonded to the cuff.

Claims

1. A breathing apparatus to be worn around the head and neck of a user allowing the user to breathe uncontaminated air, the apparatus comprising:

a half mask covering the nose and mouth of a user, said half mask having mask edges which come into contact with the face of the user;

a connection opening formed in said half mask to allow the uncontaminated air into said half mask and to be breathed by the user;

a wide cuff elastic band connected to said half mask, said elastic cuff band for positioning around the cheeks and nape of the users head, said wide cuff band being connected along the entire length of said mask edges to provide a head opening and a neck opening for the user, said neck opening forming a sealing contact with the neck of the user when worn;

a sealing lip on said head opening contacting at least a portion of the head, and forming a sealing contact with the head; and

an at least partially transparent hood and means to air tightly attach said hood to said head opening.

2. An apparatus in accordance with claim 1, wherein:

said partially transparent hood is made of flame proof and heat resistant materials.

3. An apparatus in accordance with claim 1, wherein:

said partially transparent hood is provided with a barrier layer that is impermeable to water vapor.

4. An apparatus in accordance with claim 3, wherein:

a filter is connected to said connection on said mask;

said partially transparent hood is used as a vacuum tight packaging envelope for said half mask and said filter.

5. An apparatus in accordance with claim 4, wherein:

said packaging envelope in sealed with a pulloff strip.

6. A breathing apparatus to be worn around the head and neck of a user allowing the user to breathe uncontaminated air, the apparatus comprising:

a half mask covering the nose and mouth of a user, said half mask having mask edges which come into contact with the face of the user;

a connection opening formed in said half mask to allow the uncontaminated air into said half mask and to be breathed by the user;

a wide cuff elastic band connected to said half mask forming a continuous loop, said elastic cuff band for positioning around the cheeks and nape of the users head, said wide cuff band being connected along the entire length of said mask edges to provide said continuous loop with a head opening and a neck opening for the user, said neck opening forming a sealing contact with the neck of the user when worn;

a sealing lip on said head opening contacting at least a portion of the head, and forming a sealing contact with the head; and

an at least partially transparent hood and means to air tightly attach said hood to said head opening.

7. An apparatus in accordance with claim 6 wherein:

said half mask and said wide cuff are made in one piece.

8. An apparatus in accordance with claim 6 wherein:

said wide band cuff has a strap that is in contact with the occipital region of the mask user.