GB1297305A - - Google Patents
Info
- Publication number
- GB1297305A GB1297305A GB1297305DA GB1297305A GB 1297305 A GB1297305 A GB 1297305A GB 1297305D A GB1297305D A GB 1297305DA GB 1297305 A GB1297305 A GB 1297305A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- tube
- opening
- outlet
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/04—Couplings; Supporting frames
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
1297305 Breathing masks; valve and speaking diaphragm unit MINE SAFETY APPLIANCES CO 6 March 1970 [29 April 1969] 10881/70 Heading A5T A breathing mask comprising an air inlet, and a nose cup having an air outlet is provided with a valve and speaking diaphragm unit in fluid communication with the said inlet through an inhalation valve, and with the said outlet through an exhalation valve. As shown, the nose cup 2 has an outlet 4, and inlet passages 6 of the mask are in communication with the inside of an open tube 10 via an opening 11 in the walls of the tube diametrically opposite a speaking diaphragm 16 in a second opening. A second tube 17 is sealed at one end around the diaphragm 16 and extends transversely to the tube 10 through the opening 11 and is spaced from the walls of a flange 12 mounted around the opening 11 but connected to the flange by walls 18, 20. The flange 12 has an opening 14, and the second tube 17, an opening 19 such that the inlet passages 6 are in communication only with one end of the tube 10, while the outlet 4 is in communication only with the other. An inhalation valve 23 is placed inside the end portion of the inlet portion of the tube 10 and an exhalation valve 22, inside the other end portion. Each of the valves comprises a generally cylindrical cup 25 with a base 26 with an opening 28 over which is placed a flexible flap 33, within the body for an exhalation valve and outside it for an inhalation valve. Ribs (35)-(37), Fig. 6 (not shown), are provided extending longitudinally over the surface of the cup 25 and are adapted to fit into grooves in the inside of the tube 10, the cups of either type of valve being initially identical. A rib of the exhalation valve 22 is removed prior to insertion and one of the inhalation valve 23 is also removed, this rib being in a different position on the body 25 to that removed from the valve 22, corresponding grooves of the tube 10 being placed so that the valves may not be inserted into the wrong ends.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82007069A | 1969-04-29 | 1969-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1297305A true GB1297305A (en) | 1972-11-22 |
Family
ID=25229809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1297305D Expired GB1297305A (en) | 1969-04-29 | 1970-03-06 |
Country Status (6)
Country | Link |
---|---|
US (1) | US3572332A (en) |
JP (1) | JPS499518B1 (en) |
DE (1) | DE2014969C3 (en) |
FR (1) | FR2043022A5 (en) |
GB (1) | GB1297305A (en) |
NL (1) | NL7005824A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2209123A (en) * | 1987-08-29 | 1989-05-04 | M S A | Breathing apparatus |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029092A (en) * | 1973-09-17 | 1977-06-14 | U. S. Divers Co. | Compartmentalized full face mask |
JPS5621409Y2 (en) * | 1976-07-05 | 1981-05-20 | ||
EP0087909B1 (en) * | 1982-02-26 | 1987-06-24 | Avon Industrial Polymers Limited | Respirator air guide |
IT1216459B (en) * | 1988-02-26 | 1990-03-08 | Ind Pirelli S P A Milano Minis | PROTECTIVE MASK FOR OPERATIONAL INTERVENTIONS IN CONTAMINATED ENVIRONMENTS. |
US5570688A (en) * | 1993-11-17 | 1996-11-05 | Cochran Consulting, Inc. | Advanced dive computer for use with a self-contained underwater breathing apparatus |
DE19845572C2 (en) * | 1998-10-02 | 2002-06-06 | Draeger Safety Ag & Co Kgaa | Speech transmitter for a respirator |
GB0406291D0 (en) * | 2004-03-19 | 2004-04-21 | Scott Health & Safety Ltd | Respirators |
US20070235031A1 (en) * | 2006-03-31 | 2007-10-11 | 3M Innovative Properties Company | Full face respiratory protection device |
-
1969
- 1969-04-29 US US820070A patent/US3572332A/en not_active Expired - Lifetime
-
1970
- 1970-03-06 GB GB1297305D patent/GB1297305A/en not_active Expired
- 1970-03-28 DE DE2014969A patent/DE2014969C3/en not_active Expired
- 1970-04-07 FR FR7012511A patent/FR2043022A5/fr not_active Expired
- 1970-04-22 NL NL7005824A patent/NL7005824A/xx unknown
- 1970-04-27 JP JP45035499A patent/JPS499518B1/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2209123A (en) * | 1987-08-29 | 1989-05-04 | M S A | Breathing apparatus |
Also Published As
Publication number | Publication date |
---|---|
US3572332A (en) | 1971-03-23 |
DE2014969A1 (en) | 1970-11-12 |
JPS499518B1 (en) | 1974-03-05 |
NL7005824A (en) | 1970-11-02 |
DE2014969C3 (en) | 1975-02-06 |
FR2043022A5 (en) | 1971-02-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |