GB353380A - Improvements in or relating to gas masks and the like - Google Patents

Improvements in or relating to gas masks and the like

Info

Publication number
GB353380A
GB353380A GB6884/31A GB688431A GB353380A GB 353380 A GB353380 A GB 353380A GB 6884/31 A GB6884/31 A GB 6884/31A GB 688431 A GB688431 A GB 688431A GB 353380 A GB353380 A GB 353380A
Authority
GB
United Kingdom
Prior art keywords
march
valve body
relating
rubber
gas masks
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
GB6884/31A
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.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
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 Pirelli SpA filed Critical Pirelli SpA
Publication of GB353380A publication Critical patent/GB353380A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

353,380. Elastic non-return valves. SOC. ITALIANA PIRELLI, 21, Via Fabio Filzi, Milan, Italy. March 5, 1931, No. 6884. Convention date, March 6, 1930. [Class 135.] A non-return valve for use on a gas mask comprises a rubber membrane 4 secured at intervals around its periphery to a seat 3 formed integrally with a valve body made of plastic material such as rubber. The valve body has a lower flange 2 reinforced by an annular perforation stiffening ring 9.
GB6884/31A 1930-03-06 1931-03-05 Improvements in or relating to gas masks and the like Expired GB353380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT353380X 1930-03-06

Publications (1)

Publication Number Publication Date
GB353380A true GB353380A (en) 1931-07-23

Family

ID=11241218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6884/31A Expired GB353380A (en) 1930-03-06 1931-03-05 Improvements in or relating to gas masks and the like

Country Status (1)

Country Link
GB (1) GB353380A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429984A (en) * 1944-08-23 1947-11-04 American Can Co Valve closed container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429984A (en) * 1944-08-23 1947-11-04 American Can Co Valve closed container

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