GB689186A - Improvements in or relating to gas masks or respirator face-pieces - Google Patents

Improvements in or relating to gas masks or respirator face-pieces

Info

Publication number
GB689186A
GB689186A GB731950A GB731950A GB689186A GB 689186 A GB689186 A GB 689186A GB 731950 A GB731950 A GB 731950A GB 731950 A GB731950 A GB 731950A GB 689186 A GB689186 A GB 689186A
Authority
GB
United Kingdom
Prior art keywords
relating
pieces
gas masks
respirator face
face
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
GB731950A
Inventor
Cyril George Trotman
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB731950A priority Critical patent/GB689186A/en
Publication of GB689186A publication Critical patent/GB689186A/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

Abstract

A respirator facepiece of the type having an annular pneumatic cushion which forms part of the inner surface of the facepiece and which makes continuous contact with the face of the wearer so as to form an air-tight seal, has the annular cushion arranged so as to provide an enlarged portion which makes contact under the chin.
GB731950A 1950-03-23 1950-03-23 Improvements in or relating to gas masks or respirator face-pieces Expired GB689186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB731950A GB689186A (en) 1950-03-23 1950-03-23 Improvements in or relating to gas masks or respirator face-pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB731950A GB689186A (en) 1950-03-23 1950-03-23 Improvements in or relating to gas masks or respirator face-pieces

Publications (1)

Publication Number Publication Date
GB689186A true GB689186A (en) 1953-03-25

Family

ID=9830861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB731950A Expired GB689186A (en) 1950-03-23 1950-03-23 Improvements in or relating to gas masks or respirator face-pieces

Country Status (1)

Country Link
GB (1) GB689186A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2868195A (en) * 1955-08-03 1959-01-13 Leonard P Frieder Oxygen mask
CN104375288A (en) * 2014-12-15 2015-02-25 徐文茜 Wind blocking glasses
CN104391381A (en) * 2014-12-15 2015-03-04 徐文茜 Adjustable wind-proof glasses
CN104460045A (en) * 2014-12-15 2015-03-25 徐文茜 Wind-proof glasses with rain wipers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2868195A (en) * 1955-08-03 1959-01-13 Leonard P Frieder Oxygen mask
CN104375288A (en) * 2014-12-15 2015-02-25 徐文茜 Wind blocking glasses
CN104391381A (en) * 2014-12-15 2015-03-04 徐文茜 Adjustable wind-proof glasses
CN104460045A (en) * 2014-12-15 2015-03-25 徐文茜 Wind-proof glasses with rain wipers

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