GB2239328B - Pilot operated valves - Google Patents

Pilot operated valves

Info

Publication number
GB2239328B
GB2239328B GB9102595A GB9102595A GB2239328B GB 2239328 B GB2239328 B GB 2239328B GB 9102595 A GB9102595 A GB 9102595A GB 9102595 A GB9102595 A GB 9102595A GB 2239328 B GB2239328 B GB 2239328B
Authority
GB
United Kingdom
Prior art keywords
pilot operated
operated valves
valves
pilot
operated
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 - Lifetime
Application number
GB9102595A
Other versions
GB9102595D0 (en
GB2239328A (en
Inventor
Peter Joseph Jackson
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
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
Priority claimed from GB868621516A external-priority patent/GB8621516D0/en
Application filed by Individual filed Critical Individual
Priority to GB9102595A priority Critical patent/GB2239328B/en
Publication of GB9102595D0 publication Critical patent/GB9102595D0/en
Publication of GB2239328A publication Critical patent/GB2239328A/en
Application granted granted Critical
Publication of GB2239328B publication Critical patent/GB2239328B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A62B9/022—Breathing demand regulators
    • A62B9/027—Breathing demand regulators pilot operated, i.e. controlled by valve means sensitive to a reduced downstream pressure
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/14—Control of fluid pressure with auxiliary non-electric power
    • G05D16/16—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid
    • G05D16/163—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid using membranes within the main valve

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
GB9102595A 1986-09-06 1991-02-06 Pilot operated valves Expired - Lifetime GB2239328B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9102595A GB2239328B (en) 1986-09-06 1991-02-06 Pilot operated valves

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868621516A GB8621516D0 (en) 1986-09-06 1986-09-06 Pilot operated valves
GB9102595A GB2239328B (en) 1986-09-06 1991-02-06 Pilot operated valves

Publications (3)

Publication Number Publication Date
GB9102595D0 GB9102595D0 (en) 1991-03-27
GB2239328A GB2239328A (en) 1991-06-26
GB2239328B true GB2239328B (en) 1991-09-25

Family

ID=26291266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9102595A Expired - Lifetime GB2239328B (en) 1986-09-06 1991-02-06 Pilot operated valves

Country Status (1)

Country Link
GB (1) GB2239328B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9301959D0 (en) * 1993-02-01 1993-03-17 Sabre Safety Ltd A valve for use in breathing apparatus
GB2378745B (en) 2001-08-15 2005-07-13 Internat Safety Instr Inc Demand valve for breathing apparatus

Also Published As

Publication number Publication date
GB9102595D0 (en) 1991-03-27
GB2239328A (en) 1991-06-26

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20070825