US2233200A - Vacuum breaking device for flushing valves - Google Patents
Vacuum breaking device for flushing valves Download PDFInfo
- Publication number
- US2233200A US2233200A US26710239A US2233200A US 2233200 A US2233200 A US 2233200A US 26710239 A US26710239 A US 26710239A US 2233200 A US2233200 A US 2233200A
- Authority
- US
- United States
- Prior art keywords
- valve
- breaking device
- air
- check valve
- flushing
- 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
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Classifications
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- 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
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- 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
- E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
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- 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
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- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7838—Plural
- Y10T137/7846—Mechanically interconnected
Definitions
- This invention relates to an improved vacuum-breaking device for use in conjunction with a flushing valve, and applies more particularly to that type of flushing valve designed for direct connection to a Water supply main such as the valve described in my earlier U. S. A. Patent No. 2,177,099.
- Flushing valves of the above referred to type have previously sufiered from a defect in that, in the event of the water mains being emptied for repairs or other purposes, the partial vacuum created by the outgoing volume or water, tends to cause contaminated air, and even sewage, to be sucked into the water mains with serious consequences as regards the health of the device which, by automatically admitting pure air to break any partial vacuum which may be created in the flush pipe; overcomes the above described rather serious defect.
- a vacuum-breaking device adapted for use in conjunction with a flushing valve of the type described, consists of a casing adapted for connection in series with the flush pipe, a check valve in said casing norto be opened by the stream of flushing water, and an inwardly opening valve-controlled air admission aperture in said casing communicating with that part of the interior space thereof which is on the upstream side of the check valve.
- the interior space of the casing is divided by a holed partition wall into upper and lower chambers adapted for connection to the flushing valve and flush pipe respectively.
- a downwardly opening check valve is located in the lower chamber, and forms a closure for the hole in said partition wall, while an inwardly-opening valve-controlled air admission aperture communicates from the atmosphere with the upper chamber.
- valve-controlled air admission aperture is arranged at a level above the level of the check valve. This arrangement. besides ensuring the admissionof pure air obviates any leakage of residual flush water through the said air admission apertures.
- the check valve is interconnected by means of a pivoted lever with a single air vvalve forming the closure for an air admission aperture or apertures, located in a passage communicating with the upper chamber, the arrangement being-such that said check valve is held in the closed position by the action of gravity due to a oounterbalancing efiect produced by said air valve or the pivoted lever to which it is attached.
- a casing 30 is divided by a holed partition wall 3
- a check valve Ba and an air valve 35; are attached to opposite ends of an intermediately pivoted lever 33.
- the air valve 35 forms a closure for the air admission aperture 33 and the arrangement is such that the clockwise counter-balancing moment about the axis of the pivot 31, is always greater than the anti-clockwise moment about this axis, so that the check valve 3a is at all times biased towards its closed position. This is simply accomplished by weighting the air valve 35 or its lever arm.
- the check valve 8a may be pivotally connected to its lever arm as shown, to facilitate seating.
- the check valve 8 or 8a is opened by the force and weight of the flushing water descending upon it and, in the case of the device of Fig. 7 such opening causes the air valve 35 to close the air admission aperture 33.
- the check valve 8 or '8a prevents contaminated air passing into the mains from the flush pipe while the air admission apertures l2,
- a vacuum-breaking device comprising a casing defining a conduit for the passage of a stream offluid therethrough, a non-return check valve in said casing intermediate the ends of said conduit, said casing being further provided with an inwardly-opening air admission aperture communicating with that part of the said conduit which is on the upstream side of said check valve, an air valve controlling said air admission aperture, and a lever in said casing pivoted-intermediate the ends thereof and interconnecting said check valve and air valve for simultaneous FRANCIS L. DRE-YER.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
I Feb. 25, 1941. DREYER 2,233,200
VACUUM BREAKING DEVICE FOR FLUSHING VALVES Filed April 10, 1939 Patented Feb. 25, 1941 UNITED smrss vacuum BREAKING DEVICE FOR FLUSHING VALVES Francis Louis Dreyer, Pretoria West, Transvaal, Union of South Africa Application April 10, 1939, Serial No. 267,102. In the Union of South Africa February 7, 1939 1 Claim.
This invention relates to an improved vacuum-breaking device for use in conjunction with a flushing valve, and applies more particularly to that type of flushing valve designed for direct connection to a Water supply main such as the valve described in my earlier U. S. A. Patent No. 2,177,099.
Flushing valves of the above referred to type, have previously sufiered from a defect in that, in the event of the water mains being emptied for repairs or other purposes, the partial vacuum created by the outgoing volume or water, tends to cause contaminated air, and even sewage, to be sucked into the water mains with serious consequences as regards the health of the device which, by automatically admitting pure air to break any partial vacuum which may be created in the flush pipe; overcomes the above described rather serious defect.
According to the invention, a vacuum-breaking device adapted for use in conjunction with a flushing valve of the type described, consists of a casing adapted for connection in series with the flush pipe, a check valve in said casing norto be opened by the stream of flushing water, and an inwardly opening valve-controlled air admission aperture in said casing communicating with that part of the interior space thereof which is on the upstream side of the check valve.
More particularly the interior space of the casing is divided by a holed partition wall into upper and lower chambers adapted for connection to the flushing valve and flush pipe respectively. A downwardly opening check valve is located in the lower chamber, and forms a closure for the hole in said partition wall, while an inwardly-opening valve-controlled air admission aperture communicates from the atmosphere with the upper chamber.
It is to be understood from the foregoing, that the valve-controlled air admission aperture is arranged at a level above the level of the check valve. This arrangement. besides ensuring the admissionof pure air obviates any leakage of residual flush water through the said air admission apertures. I
In a presently-preferred embodiment of the invention, the check valve is interconnected by means of a pivoted lever with a single air vvalve forming the closure for an air admission aperture or apertures, located in a passage communicating with the upper chamber, the arrangement being-such that said check valve is held in the closed position by the action of gravity due to a oounterbalancing efiect produced by said air valve or the pivoted lever to which it is attached.
is now made to the accompanying figure of draw- 7 ing showing a vertical section through the aforesaid preferred embodiment of the invention.
According to this embodiment, all springs may be eliminated and the force of gravity used instead thereof. A casing 30 is divided by a holed partition wall 3| intoupper and lower chambers 6a and 111 respectively. A passage 3200mmunicates with the chamber Ba, and an air admission aperture 33 protected by a dust cover 34, is provided in its upwardly directed end. A check valve Ba and an air valve 35;, are attached to opposite ends of an intermediately pivoted lever 33. The air valve 35 forms a closure for the air admission aperture 33 and the arrangement is such that the clockwise counter-balancing moment about the axis of the pivot 31, is always greater than the anti-clockwise moment about this axis, so that the check valve 3a is at all times biased towards its closed position. This is simply accomplished by weighting the air valve 35 or its lever arm. The check valve 8a may be pivotally connected to its lever arm as shown, to facilitate seating.
During normal operation 'the check valve 8 or 8a is opened by the force and weight of the flushing water descending upon it and, in the case of the device of Fig. 7 such opening causes the air valve 35 to close the air admission aperture 33. In the event of a partial vacuum being created in the mains and subsequently, when the flushing valve is operated, in the chamber 6 or 6a, the check valve 8 or '8a prevents contaminated air passing into the mains from the flush pipe while the air admission apertures l2,
20, 23 or 33 open and permit pure air to enter the mains .so as to break the partial vacuum and restore normal conditions.
What I claim is:
" A vacuum-breaking device comprising a casing defining a conduit for the passage of a stream offluid therethrough, a non-return check valve in said casing intermediate the ends of said conduit, said casing being further provided with an inwardly-opening air admission aperture communicating with that part of the said conduit which is on the upstream side of said check valve, an air valve controlling said air admission aperture, and a lever in said casing pivoted-intermediate the ends thereof and interconnecting said check valve and air valve for simultaneous FRANCIS L. DRE-YER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2233200X | 1939-02-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2233200A true US2233200A (en) | 1941-02-25 |
Family
ID=25588301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US26710239 Expired - Lifetime US2233200A (en) | 1939-02-07 | 1939-04-10 | Vacuum breaking device for flushing valves |
Country Status (1)
Country | Link |
---|---|
US (1) | US2233200A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2580198A (en) * | 1947-04-04 | 1951-12-25 | J A Zurn Mfg Company | Check valve and venting means for hydrants |
US2709045A (en) * | 1950-06-06 | 1955-05-24 | Onderzoekings Inst Res | Process of manufacturing cellulose powder |
US4080981A (en) * | 1976-10-12 | 1978-03-28 | Stewart Anthony F | Antisiphon check valve |
US4287905A (en) * | 1980-04-10 | 1981-09-08 | Gilberto Iglesias | Anti-backflow valve for a faucet |
-
1939
- 1939-04-10 US US26710239 patent/US2233200A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2580198A (en) * | 1947-04-04 | 1951-12-25 | J A Zurn Mfg Company | Check valve and venting means for hydrants |
US2709045A (en) * | 1950-06-06 | 1955-05-24 | Onderzoekings Inst Res | Process of manufacturing cellulose powder |
US4080981A (en) * | 1976-10-12 | 1978-03-28 | Stewart Anthony F | Antisiphon check valve |
US4287905A (en) * | 1980-04-10 | 1981-09-08 | Gilberto Iglesias | Anti-backflow valve for a faucet |
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