CA929821A - Backflow preventer - Google Patents

Backflow preventer

Info

Publication number
CA929821A
CA929821A CA108496A CA108496A CA929821A CA 929821 A CA929821 A CA 929821A CA 108496 A CA108496 A CA 108496A CA 108496 A CA108496 A CA 108496A CA 929821 A CA929821 A CA 929821A
Authority
CA
Canada
Prior art keywords
backflow preventer
preventer
backflow
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
CA108496A
Inventor
R. Butcher James
G. Gyllstrom Richard
Doyle Lamb W.
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.)
A W Cash Valve Manufacturing Corp
Original Assignee
A W Cash Valve Manufacturing Corp
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 A W Cash Valve Manufacturing Corp filed Critical A W Cash Valve Manufacturing Corp
Application granted granted Critical
Publication of CA929821A publication Critical patent/CA929821A/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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/06—Devices, e.g. valves, for venting or aerating enclosures for aerating only
    • 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
    • F16K15/141—Check valves with flexible valve members the closure elements not being fixed to the valve body
    • F16K15/142—Check valves with flexible valve members the closure elements not being fixed to the valve body the closure elements being shaped as solids of revolution, e.g. toroidal or cylindrical rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185—Air vent in liquid flow line
    • Y10T137/3294—Valved
    • Y10T137/3331—With co-acting valve in liquid flow path

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
CA108496A 1970-08-13 1971-03-23 Backflow preventer Expired CA929821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6356070A 1970-08-13 1970-08-13

Publications (1)

Publication Number Publication Date
CA929821A true CA929821A (en) 1973-07-10

Family

ID=22050023

Family Applications (1)

Application Number Title Priority Date Filing Date
CA108496A Expired CA929821A (en) 1970-08-13 1971-03-23 Backflow preventer

Country Status (2)

Country Link
US (1) US3670760A (en)
CA (1) CA929821A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT971505B (en) * 1972-12-04 1974-05-10 Goglio L DEGASSING VALVE FOR FLEXIBLE COUNTERS WITH HERMIC CLOSURE AND CONTAINER FITTED WITH THE VALVE
US3850190A (en) * 1973-09-17 1974-11-26 Mark Controls Corp Backflow preventer
USRE30849E (en) * 1975-02-07 1982-01-19 Jaclo, Inc. Anti-siphon and backflow prevention valve
US4080981A (en) * 1976-10-12 1978-03-28 Stewart Anthony F Antisiphon check valve
US4726390A (en) * 1986-03-26 1988-02-23 Waltec, Inc. Hose bibb vacuum breaker
US4712575A (en) * 1987-03-02 1987-12-15 A. W. Cash Valve Manufacturing Corporation Self-draining hose connection vacuum breaker and backflow preventer
US4958803A (en) * 1987-05-04 1990-09-25 Chappell Gilmore H Automatic fluid valve
US4895468A (en) * 1987-05-04 1990-01-23 Chappell Gilmore H Brush with automatic water shut-off
US5169252A (en) * 1987-05-04 1992-12-08 Chappell International, Inc. Cleaning implement with automatic hand regulated shut-off
IT1222592B (en) * 1987-09-04 1990-09-05 Marco Giacomini NON-RETURN VALVE FOR DISPENSING TAPS
US5566704A (en) * 1995-01-06 1996-10-22 Watts Investment Company Backflow preventer and test cock assembly
US5992442A (en) * 1997-05-29 1999-11-30 Urquhart; Edward F. Relief valve for use with hermetically sealed flexible container
US20060157110A1 (en) * 2005-01-18 2006-07-20 Yeh Ming C Vacuum breaker for hose connection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2033467A (en) * 1935-06-07 1936-03-10 Pierce John B Foundation Air valve-vacuum breaker
US2997054A (en) * 1958-12-17 1961-08-22 Joseph C Woodford Vacuum breaker
US3207171A (en) * 1962-05-09 1965-09-21 R E Chapin Mfg Works Inc Back-flow preventing valve
US3270771A (en) * 1963-06-11 1966-09-06 Robertshaw Controls Co Resilient disc check valve
US3303800A (en) * 1964-03-12 1967-02-14 Milton K Stabe Soil conditioning apparatus

Also Published As

Publication number Publication date
US3670760A (en) 1972-06-20

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