GB837354A - Mask for breathing apparatus - Google Patents

Mask for breathing apparatus

Info

Publication number
GB837354A
GB837354A GB1840/58A GB184058A GB837354A GB 837354 A GB837354 A GB 837354A GB 1840/58 A GB1840/58 A GB 1840/58A GB 184058 A GB184058 A GB 184058A GB 837354 A GB837354 A GB 837354A
Authority
GB
United Kingdom
Prior art keywords
bead
window
facepiece
clamp
deflector
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
Application number
GB1840/58A
Inventor
Harry Wilson Austin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MSA Safety Inc
Original Assignee
Mine Safety Appliances Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mine Safety Appliances Co filed Critical Mine Safety Appliances Co
Priority to GB1840/58A priority Critical patent/GB837354A/en
Priority to GB17737/59A priority patent/GB837355A/en
Publication of GB837354A publication Critical patent/GB837354A/en
Expired legal-status Critical Current

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
    • 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
    • A62B18/02—Masks

Abstract

837,354. Breathing-masks. MINE SAFETY APPLIANCES CO. Jan. 20, 1958, No. 1840/58. Class 81(2). A breathing-mask has a window secured in a slot in a bead around the window, clamping means engaging the bead on opposite sides of the slot and being spaced from the bead where it surrounds the edge of the window. A rubber facepiece 1 has a window opening 3 surrounded by an integral bead 4. A window 6 is fitted in a slot 5 in the bead 4, the sides of which are clamped together by a clamp 10 which encircles the bead 4. The clamp 10 comprises rigid upper and lower interchangeable halves each having an outer flange 11, which engages a shoulder 7 on the bead 4, and an inner flange 12 which engages a groove 8 formed between the bead 4 and the facepiece 1. The halves of the clamp 10 are drawn together by screws 16 engaging lugs 15 at their ends and thus stretch the bead slot 5 over the edge of the window 6 and press the sides of the bead slot 5 against the window 6. When in position a space 13 is left between clamp 10 and the part of the bead 4 adjacent the extreme edge of the window 6. The facepiece has a flexible sealing lip 2 near its edge and grooves 19 adjacent the ends of the window 6 to increase the flexibility of the facepiece. An air supply is connected to a coupling 23, air flowing, on inhalation, into a housing 21 and thence by way of an inhalation valve 26 into a space between the facepiece and a deflector 31. Most of the edges of the deflector 31, which is secured around a speaking diaphragm 32 by a ring 33, contact the facepiece 1 to define a duct on each side of the facepiece. The ducts open adjacent the ends of the window 6 so that air sweeps across the window 6 before being inhaled. A tube 24 extending through the deflector 31 and the housing 21 conveys exhaled air to an exhalation valve 27. In an alternative construction (not shown) the tube 24 is omitted and inhalation valves are provided in the air inlet housing and in the ducts formed by the deflector. Exhalation valves are provided in the base of the deflector and in the housing. The inner flange of the clamp 10 may be replaced by a band pressed against the groove between the bead and the facepiece by the clamp. Specification 837,355 is referred to.
GB1840/58A 1958-01-20 1958-01-20 Mask for breathing apparatus Expired GB837354A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1840/58A GB837354A (en) 1958-01-20 1958-01-20 Mask for breathing apparatus
GB17737/59A GB837355A (en) 1958-01-20 1958-01-20 Breathing mask construction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1840/58A GB837354A (en) 1958-01-20 1958-01-20 Mask for breathing apparatus
GB17737/59A GB837355A (en) 1958-01-20 1958-01-20 Breathing mask construction

Publications (1)

Publication Number Publication Date
GB837354A true GB837354A (en) 1960-06-15

Family

ID=62527845

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1840/58A Expired GB837354A (en) 1958-01-20 1958-01-20 Mask for breathing apparatus
GB17737/59A Expired GB837355A (en) 1958-01-20 1958-01-20 Breathing mask construction

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB17737/59A Expired GB837355A (en) 1958-01-20 1958-01-20 Breathing mask construction

Country Status (1)

Country Link
GB (2) GB837354A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1234531B (en) * 1965-03-10 1967-02-16 Draegerwerk Ag Respirator with window flush
DE1238780B (en) * 1960-04-01 1967-04-13 Pirelli Societa Per Aziona Respirator made of rubber with a window and window flush and mold for making the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315673A (en) * 1964-07-13 1967-04-25 Sierra Eng Co Retaining means for face masks
BE904392A (en) * 1986-03-12 1987-04-23 Vandeputte Gilbert GAS MASK
ES2000236B3 (en) * 1986-03-12 1990-10-16 Engicom Nv GAS MASK
BE905393A (en) * 1986-09-08 1986-12-31 Vandeputte Gilbert Gas mask accessory - has valve shutting off connection from inside to outside and allowing food supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238780B (en) * 1960-04-01 1967-04-13 Pirelli Societa Per Aziona Respirator made of rubber with a window and window flush and mold for making the same
DE1234531B (en) * 1965-03-10 1967-02-16 Draegerwerk Ag Respirator with window flush

Also Published As

Publication number Publication date
GB837355A (en) 1960-06-15

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