GB1374833A – Backflow preventors
– Google Patents
GB1374833A – Backflow preventors
– Google Patents
Backflow preventors
Info
Publication number
GB1374833A
GB1374833A
GB1671772A
GB1671772A
GB1374833A
GB 1374833 A
GB1374833 A
GB 1374833A
GB 1671772 A
GB1671772 A
GB 1671772A
GB 1671772 A
GB1671772 A
GB 1671772A
GB 1374833 A
GB1374833 A
GB 1374833A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
cap
assembly
anchors
april
Prior art date
1971-04-20
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
GB1671772A
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.)
Pegler Hattersley Ltd
Original Assignee
Pegler Hattersley 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.)
1971-04-20
Filing date
1972-04-11
Publication date
1974-11-20
1972-04-11
Application filed by Pegler Hattersley Ltd
filed
Critical
Pegler Hattersley Ltd
1974-11-20
Publication of GB1374833A
publication
Critical
patent/GB1374833A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
E—FIXED CONSTRUCTIONS
E03—WATER SUPPLY; SEWERAGE
E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
E03C1/02—Plumbing installations for fresh water
E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
E—FIXED CONSTRUCTIONS
E03—WATER SUPPLY; SEWERAGE
E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
E03C1/02—Plumbing installations for fresh water
E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
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
F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
F16K11/105—Three-way check or safety valves with two or more closure members
Abstract
1374833 Valves PEGLER-HATTERSLEY Ltd 11 April 1972 [20 April 1971] 16717/72 Heading F2V A three valve assembly consisting of two check and one relief valve, comprises a central body portion 10 the ends of which are in screwthreaded engagement with spigot carrying end caps 12 and 14. Cap 12 anchors a first diaphragm 32 which has a central aperture 34 and which co-operates with a seat member 36 extending from a filter assembly 38. Similarly, cap 14 anchors a second diaphragm 40 which has a central aperture 42 and which co-operates with a seat member 44 extending from a hollow chamber 22 apertured at 27, a further filter assembly 46 being disposed proximate the spigot 16 of cap 14. Flow in the direction indicated by arrows, tends to move both diaphragms away from their respective chambers so creating a flow path 16, 38, 34, 23, 27, 42, 46 and 16. Should the pressure differential across the assembly fall below a certain value, then diaphragm 40 is seated against member 44 and the pressure acting on this diaphragm tends to move a piston assembly 52, 48, 46 leftwardly, as seen in the drawing. This serves to displace diaphragm 32 from an annular flange 24 and so open chamber 23 to the piston assembly containing chamber 20, the latter being vented to drain by an opening 18. Similar venting is obtained in the event of diaphragm rupture or leakage between a seating member and its associated diaphragm. Modifications of the above embodiment are depicted in Figs. 3 to 6, not shown.
GB1671772A
1971-04-20
1972-04-11
Backflow preventors
Expired
GB1374833A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NZ16342671
1971-04-20
Publications (1)
Publication Number
Publication Date
GB1374833A
true
GB1374833A
(en)
1974-11-20
Family
ID=19916758
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1671772A
Expired
GB1374833A
(en)
1971-04-20
1972-04-11
Backflow preventors
Country Status (3)
Country
Link
FR
(1)
FR2138644B1
(en)
GB
(1)
GB1374833A
(en)
NL
(1)
NL7205276A
(en)
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2006027037A1
(en)
*
2004-09-10
2006-03-16
Alfred Kärcher Gmbh & Co. Kg
Back flow preventor
CN1333191C
(en)
*
2003-03-20
2007-08-22
李金友
Novel controllable non-return valve
EP2801672A1
(en)
*
2013-05-07
2014-11-12
Honeywell Technologies Sarl
System separator
CN110360345A
(en)
*
2019-07-26
2019-10-22
黄洪刚
A kind of protecting against shock three-way pressure reducing valve
1972
1972-04-11
GB
GB1671772A
patent/GB1374833A/en
not_active
Expired
1972-04-19
NL
NL7205276A
patent/NL7205276A/xx
unknown
1972-04-19
FR
FR7213860A
patent/FR2138644B1/fr
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN1333191C
(en)
*
2003-03-20
2007-08-22
李金友
Novel controllable non-return valve
WO2006027037A1
(en)
*
2004-09-10
2006-03-16
Alfred Kärcher Gmbh & Co. Kg
Back flow preventor
EP2801672A1
(en)
*
2013-05-07
2014-11-12
Honeywell Technologies Sarl
System separator
CN110360345A
(en)
*
2019-07-26
2019-10-22
黄洪刚
A kind of protecting against shock three-way pressure reducing valve
Also Published As
Publication number
Publication date
NL7205276A
(en)
1972-11-29
DE2218646B2
(en)
1975-11-13
DE2218646A1
(en)
1972-11-16
FR2138644A1
(en)
1973-01-05
FR2138644B1
(en)
1973-07-13
Similar Documents
Publication
Publication Date
Title
US4013089A
(en)
1977-03-22
Back flow preventer valve
US4194522A
(en)
1980-03-25
Air pressure regulator
US3782410A
(en)
1974-01-01
Valve
US2886283A
(en)
1959-05-12
Seat and seal
GB1412729A
(en)
1975-11-05
Valve
GB1104424A
(en)
1968-02-28
Liquid flush control valves and pistons therefor
GB1024524A
(en)
1966-03-30
Pressure protection valve
US3196890A
(en)
1965-07-27
Double acting check valve
US3943975A
(en)
1976-03-16
Solenoid operated pilot controlled valve
GB1490553A
(en)
1977-11-02
Fluid flow apparatus
GB1418100A
(en)
1975-12-17
Safety cut-off valve
GB1345641A
(en)
1974-01-30
Flow control valve with closure sealing ring
GB1352404A
(en)
1974-05-08
Fluid control valve assembly
GB1374833A
(en)
1974-11-20
Backflow preventors
FR1597978A
(en)
1970-06-29
US3217740A
(en)
1965-11-16
Relief valve having partial balancing arrangement
US3675896A
(en)
1972-07-11
Valve including resilient seat washer with abutting rigid annular washer
GB1122316A
(en)
1968-08-07
Improvements in fluid valve devices
US4056121A
(en)
1977-11-01
Pressure compensation valve arrangement
GB1021500A
(en)
1966-03-02
Fluid-flow control spool valves
US1884810A
(en)
1932-10-25
Relief valve
GB1413928A
(en)
1975-11-12
Gas pressure regulating valve
US4231386A
(en)
1980-11-04
Differential pressure relief valve
GB1446704A
(en)
1976-08-18
Valves
GB1393450A
(en)
1975-05-07
Combined over-and-under pressure relief valves
Legal Events
Date
Code
Title
Description
1975-04-03
PS
Patent sealed
1982-11-10
PCNP
Patent ceased through non-payment of renewal fee
