GB1517090A - Non-return valve - Google Patents

Non-return valve

Info

Publication number
GB1517090A
GB1517090A GB5406276A GB5406276A GB1517090A GB 1517090 A GB1517090 A GB 1517090A GB 5406276 A GB5406276 A GB 5406276A GB 5406276 A GB5406276 A GB 5406276A GB 1517090 A GB1517090 A GB 1517090A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
rim
seat
return valve
shape
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
GB5406276A
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.)
NORTHVALE Ltd
Original Assignee
NORTHVALE Ltd
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 NORTHVALE Ltd filed Critical NORTHVALE Ltd
Priority to GB5406276A priority Critical patent/GB1517090A/en
Publication of GB1517090A publication Critical patent/GB1517090A/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
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

1517090 Valves NORTHVALE (ENG) Ltd 24 Dec 1976 54062/76 Heading F2V The diaphragm (22) of a non-return valve (10, Fig. 1, not shown) of the type having an apertured hollow conical seat (19) and a hollow conically shaped diaphragm secured therein, is moulded so as to give at least a portion of the length a non-circular cross-section (e.g. as shown) to pre-stress the diaphragm to ensure uniform distortion away from the seat in use. All of the diaphragm may have this shape, the radii of the holes 33 at the rim being greater than the radius of the rim 19C of the seat so that the diaphragm distorts to a conical shape when inserted into the seat. Alternatively, Figs. 6-8 (not shown), only a portion of the length, removed from the rim, may have a non- circular cross-section which forms longitudinal grooves (40) through which fluid flows to force the rim to distort to the same shape.
GB5406276A 1976-12-24 1976-12-24 Non-return valve Expired GB1517090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5406276A GB1517090A (en) 1976-12-24 1976-12-24 Non-return valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5406276A GB1517090A (en) 1976-12-24 1976-12-24 Non-return valve

Publications (1)

Publication Number Publication Date
GB1517090A true GB1517090A (en) 1978-07-12

Family

ID=10469810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5406276A Expired GB1517090A (en) 1976-12-24 1976-12-24 Non-return valve

Country Status (1)

Country Link
GB (1) GB1517090A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599675B2 (en) * 1986-06-20 1990-07-26 Ds-Chemie Gmbh Moulding
US6615774B2 (en) * 2001-10-03 2003-09-09 Robert G. Heulitt Adjustable pressure actuated fuel/air diaphragm valve assembly
US10143864B2 (en) 2013-11-15 2018-12-04 3M Innovative Properties Company Respirator having noncircular centroid-mounted exhalation valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599675B2 (en) * 1986-06-20 1990-07-26 Ds-Chemie Gmbh Moulding
US6615774B2 (en) * 2001-10-03 2003-09-09 Robert G. Heulitt Adjustable pressure actuated fuel/air diaphragm valve assembly
US10143864B2 (en) 2013-11-15 2018-12-04 3M Innovative Properties Company Respirator having noncircular centroid-mounted exhalation valve
US11305134B2 (en) 2013-11-15 2022-04-19 3M Innovative Properties Company Respirator having noncircular centroid-mounted exhalation valve

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19931224