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CA640428A - Pressure helmets, breathing masks or the like - Google Patents

Pressure helmets, breathing masks or the like

Info

Publication number
CA640428A
CA640428A CA640428A CA640428DA CA640428A CA 640428 A CA640428 A CA 640428A CA 640428 A CA640428 A CA 640428A CA 640428D A CA640428D A CA 640428DA CA 640428 A CA640428 A CA 640428A
Authority
CA
Canada
Prior art keywords
helmets
pressure
breathing masks
masks
breathing
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
CA640428A
Inventor
H. Taylor Eric
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA640428A publication Critical patent/CA640428A/en
Expired legal-status Critical Current

Links

CA640428A Pressure helmets, breathing masks or the like Expired CA640428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA640428T

Publications (1)

Publication Number Publication Date
CA640428A true CA640428A (en) 1962-05-01

Family

ID=35918942

Family Applications (1)

Application Number Title Priority Date Filing Date
CA640428A Expired CA640428A (en) Pressure helmets, breathing masks or the like

Country Status (1)

Country Link
CA (1) CA640428A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345642A (en) * 1965-12-09 1967-10-10 Mine Safety Appliances Co Headgear with retractable vertically movable eye shield
US4024587A (en) * 1975-03-03 1977-05-24 Griffin Products Incorporated Helmet conversion kit safety helmet
US4802243A (en) * 1987-10-26 1989-02-07 Griffiths John W Acoustic headgear-sun visor assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345642A (en) * 1965-12-09 1967-10-10 Mine Safety Appliances Co Headgear with retractable vertically movable eye shield
US4024587A (en) * 1975-03-03 1977-05-24 Griffin Products Incorporated Helmet conversion kit safety helmet
US4802243A (en) * 1987-10-26 1989-02-07 Griffiths John W Acoustic headgear-sun visor assembly

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