Патент USA US2131430код для вставки
Sept. 27, 1938. A. c. 'DoBRlcK ET AL VACUUM BREAKER original Filed Nov. '25, 1955 @Y v' 2,131,430 n 2 sheets-sheet 1 Sept. 27, 1938. A.- c. DoBRlcK ET Al. 2,131,430 VACUUM B_REAKER Original Filed Nov. >25, 1935 2 Sheets-Sheet 2 Patented Sept. 27‘, 1938 ' l y UNITED STATES PATENT oFEicE VACUUM BREAKER August C. Dobrick and Ralph A, Tank, Chicago, Ill., assignors to The Imperial Brass Manufac turing Company, Chicago, Ill., a corporation of Illinois Application'A November z5, 1935, serial No. 51,382 ~ Renewed March 3, 1,938 18 Claims. (Cl. 137-69) Our invention is concerned with vacuum said end with the gasket 24 interposed> in the breakers for use with flush valves, etc., of the customary manner. f type shown in the patent to William C. Shanley, ’ The upper end of the casing I8 is secured to No. 2,087,049, granted July 13, 1937, in which the 5 pipe between the valve and the bowl or similar member is provided with an -air inlet to prevent back-Siphonage, vand a valve cooperating therewith to prevent the possibility of any water being ` forced outward through the air inlet during the 10 flushing operation, as may tend to occur where the back-pressure is unusually high. In the vacuum breaker shown in the aforesaid the inlet member by the annulus 24’ which` is externally threaded to screw into the top of the casing I8, and internally threaded tov screw onto the reduced portion 25 of the inlet member I4. 'I‘he annulus 24'* is preferably sweated or otherwise permanently. secured upon the member I4. The air inlets 25, preferably four in number and of the shape shown in Figs. 2 and 4, extend through the annulus 24' and are protected from Shanley application, the valve and its casing are located outside of and to one side of- the pipe, 15 making an -asymmetrical structure and one in the entry of anything except air ,by the skirt 2l preferably formed integrally with the member` I4 and extending over the inlets 26, and thence 15 which the valve casing protrudes so that it is downwardly. v likely» to be accidentally struck and possibly knocked off. In our improved construction the member carrying the inlet takes the _form of What may be considered as added features to the structure of the vacuum breaker of the afore said Shanley application No. 6,761 will now be 20 annulus with the axis of the pipe as a center, so as to prevent any objectionable projections, and the valve is preferably held open by gravity instead of closed, as in the aforesaid Shanley vacuum breaker. 25 ‘To illustrate our invention we annex hereto two sheets of drawings in which the same reference characters are used to designate identical parts in all the ñgures, of whichFlg. 1 is a side elevation of a flush valve with 30 our vacuum breaker applied thereto. Fig. 2 is a central vertical section of the vacuum breaker on an enlarged scale. ' Fig. 3 is a portion of a similar view but with the parts _shown in their non-flushing position. 35 ' Figs. 4, 5 and 6 are horizontal sections on the lines 4_4, 5_5, and 6-6 of Figsg2 and 3. As usual, the supply pipe I0 to be protected opens into a hush valve II, which may be of any desired construction, operated by the handle I2 40 and having the outlet I3 upon which is screwed the inlet member I4 by the connection I5, preferably integral with the -body portion I5 which - has its internal cross section tapered, as seen at I'l, to produce a nozzle effect as shown in the 45 vacuum breaker of the Shanley application No. 6,761 ñìed February 15, 1935, upon which our invention in some respects may be considered to be an improvement. The casing member Il is in the form of agenerally cylindrical shell with A50 the inwardly and downwardly -inclined flange portion I9 forming a reduced outlet 20 of an 5 _ 10 - . described. Instead of having the nozzle inte- 20 gral for its entire length, the lower part 28 is formed of a separate tube, preferably with the vertical ribs 29 on its exterior and with its upper end threaded into the annulus 24" and contact ing the portion 25 to form a continuous outlet. _25 Ears 30 project from the lower end of the part 28, and pivoted on the ears are `the hinged p0r tions 3| of the ñaps 32, preferably two in num ber, by the pins 33,`which are loosely mounted in the aperturesof the ears 30 and the portions 3I 30 _ so that there can never beany danger of bind ing due to corrosion or possible impurities in the water. To insure the pins 33 remaining in place, we, as seen in Fig. 5, make them so long that _their ends almost contact withI the casing I8. 35 The hinged portions' 3| ` are shaped, as seen in Figs. 2 and 3, so as to cooperate with the annular valve member 34 which preferably has-'the rub ber seat 35 set „in its upper portion to cooperate with the annular seat formed by the annular ribs 4o 35_projecting downwardly from and forming the . bottom of „an annular channel 31 in the annulus 24’ and extending to the air inlets 26. 'I'he ribs 29 guide the member 34 and reduce any- possible friction. As seen in Fig. 5, the semi-annular 45 ñaps 32 do not quite meet at their edges so that a passage for air from the outside up through the inlet member I4 always exists when the valve II is not in operation, and the weight of the , annulus 24 resting on the hinged members 3| 60 . holds them closed, as' seen in Fig. 3. Instead of vleaving a passage between the flaps, we might area slightly larger than that of the nozzle outlet 28. Its lower end is externally threadedv so -form one_„or two small apertures therethrough, as that the threaded connection 22 may be usecl- to indicated in dotted lines at 38 in Fig. 5. When, _ 55 secure the flanged upper end of the pipe 23 to however, the flushing, occurs, as indicated in Fig. 66 2,131,430 2 2, the flow of the water swings the flaps 32 to the position shown, and the hinged members 3| lift the annulus to the position shown, sealing the air inlets -2li and preventing the possibility of any Ul water being forced out through them by back' pressure, no matter how strong. While we have shown and described our inven tion as embodied in the form which we at present 9. A vacuum breaker as defined in claim 1 yin which there are a pair of flaps pivoted to the noz zle substantially closing its outlet, and in which there are a plurality of arcuate air inlets located in an annulus connecting the tops of the cham ber and the nozzle and the valve member is an annulus beneath the inlets resting directly on por consider best adapted to carry out its purposes, it will be understood that it is capable of modiñ cation, and that We do not desire to be limited in the interpretation of the following claims tions of the flaps to hold them against the nozzle outlet. 10. In a vacuum breaker, the combination with 10 except as may be necessitated by the state of the prior art. _ What we claim is new, and desire to secure by Letters Patent of the United States is: 1. In a. vacuum breaker, the combination with a chamber having an outlet through which a liquid is discharged at intervals, of a nozzle ex tending thereinto well toward the outlet, a flap a cylindrical chamber having an outlet at its bottom, of a nozzle let into the top thereof and extending towards its outlet and concentric therewith, an apertured annulus connecting the top of the chamber and the upper part of the 15 nozzle, a nap cooperating with the outlet of the nozzle, and an annular valve member surrounding the nozzle and located between the flap and the apertured annulus and moved by the former` to 20 held by gravity against the outlet of said nozzle when there is no discharge of the liquid, an air inlet to said chamber concentric with the noz zle, and a valve member cooperating with the air inlet controlled by the flap. 2. In a vacuum breaker, the combination with a chamber having an outlet, of a nozzle extend ing thereinto well toward the outlet, a pair of flaps pivoted on the nozzle and held by gravity against the end of the nozzle, an air inlet to said chamber concentric with the nozzle, and a valve member cooperating with the flaps and moved thereby to engage it with the latter. 11. A vacuum breaker as defined in claim 10 in which there are a pair of flaps pivoted to the bot tom of the nozzle. tom of the nozzle and the annular valve member normally rests directly on portions of the flaps. 13. A vacuum breaker as defined in claim 10 in which there are a pair of flaps loosely pivoted to the bottom of the nozzle by pins passing loosely 30 through the pivotal portion of the flaps and ears on the nozzle and extending to the inner wall of the chamber. engage the inlet. 3. A vacuum breaker as` defined in claim 1 in which the valve member> holds the flap to the \ nozzle. - 4. A vacuum breaker as defined in claim 1 in which the flap is pivoted to the nozzle and the valve member rests on a portion of the flap to 40 hold it normally to the nozzle outlet. 5. A vacuum breaker as defined in claim 1 in which there are a pair of flaps pivoted to the nozzle substantially closing its outlet and the an nular valve member rests on portions of the ñaps. ' 12. A vacuum breaker as defined in claim 10 in which there are a pair of flaps pivoted to the bot 25 ' . ~ 14. A vacuum breaker as defined in claim 10 in which there are vertical ribs interposed between 35 the exterior of the nozzle and the interior of the annular valve member to position the latter and to reduce friction. 15. A vacuum breaker as defined in claim 10 in which there are vertical ribs on the exterior of 40 the nozzle to position the annular valve member and to reduce friction. 16. A vacuum breaker as defined in claim 10 in which there is a skirt extending from the top of the nozzle over the apertured annulus and thence 45 6. A vacuum breaker as defined in claim 1 in which the air inlet is located in an annulus con downward. necting the tops of the chamber and the nozzle. which the nozzle is composed of two parts with the lower part having the ilap‘pivoted thereto and with the upper part threaded to the aper tured annulus. '1. A vacuum breaker as defined in claim 1 in which there are a plurality of arcuate air inlets in an annulus connecting the tops of the chamber and the nozzle. 8. A vacuum breaker as defined in claim 1 in which a plurality of arcuate air inlets are located in an annulus connecting the tops of the chamber and the nozzle and the valve member is an an 55 nulus beneath the inlets and rests directly on portions of the flaps to hold them against the nozzle outlet. 17. A vacuum breaker as defined in claim 10 in 18. A vacuum breaker as defined in claim 10 in which the apertured annulus has a pair of an nular members projecting downwardly from its under side forming Va valve seat with which the annular valve member cooperates. AUGUST C.- DOBRICK. RALPH A. TANK.