GB695675A - Improvements in or relating to respirator half masks - Google Patents

Improvements in or relating to respirator half masks

Info

Publication number
GB695675A
GB695675A GB20735/51A GB2073551A GB695675A GB 695675 A GB695675 A GB 695675A GB 20735/51 A GB20735/51 A GB 20735/51A GB 2073551 A GB2073551 A GB 2073551A GB 695675 A GB695675 A GB 695675A
Authority
GB
United Kingdom
Prior art keywords
nose
facepiece
flexible
lip
sides
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
GB20735/51A
Inventor
William Parks Yant
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 GB20735/51A priority Critical patent/GB695675A/en
Publication of GB695675A publication Critical patent/GB695675A/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
    • A62B18/02—Masks
    • A62B18/025—Halfmasks

Abstract

695,675. Respirators. MINE SAFETY APPLIANCES CO. Sept. 3, 1951, No. 20735/51. Class 81 (ii). A respirator mask for covering the nose and mouth has a facepiece of resilient material and is provided with a single breathing compartment, a flexible cross strap being located at the lower end of the nose-covering portion to be engaged by the wearer's upper lip to prevent the sides of the nose covering portion spreading apart. A facepiece 1 of rubber or other impervious flexible material is provided along the rear edge with a more flexible sealing lip 11. A flexible crossmember 13 joined to the lip 11, or to the rear part of the facepiece (not shown), below the nose prevents the sides of the nose portion being pulled apart by headstraps passing through wires 9. Air inlets provided with filters 4 and an exhalation valve 7 having a cover 8 are arranged in the facepiece.
GB20735/51A 1951-09-03 1951-09-03 Improvements in or relating to respirator half masks Expired GB695675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20735/51A GB695675A (en) 1951-09-03 1951-09-03 Improvements in or relating to respirator half masks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20735/51A GB695675A (en) 1951-09-03 1951-09-03 Improvements in or relating to respirator half masks

Publications (1)

Publication Number Publication Date
GB695675A true GB695675A (en) 1953-08-12

Family

ID=10150778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20735/51A Expired GB695675A (en) 1951-09-03 1951-09-03 Improvements in or relating to respirator half masks

Country Status (1)

Country Link
GB (1) GB695675A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302219A3 (en) * 2001-10-12 2003-05-07 Euromaski Oy Protective device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302219A3 (en) * 2001-10-12 2003-05-07 Euromaski Oy Protective device
US7762256B2 (en) 2001-10-12 2010-07-27 Euromaski Oy Protective device

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