US3166086A

US3166086A - Fluid mixing device

Info

Publication number: US3166086A
Application number: US250713A
Authority: US
Inventors: Holmes Lambert
Original assignee: HERMAN DEUTSCH
Current assignee: HERMAN DEUTSCH
Priority date: 1963-01-10
Filing date: 1963-01-10
Publication date: 1965-01-19
Anticipated expiration: 1982-01-19
Also published as: GB1064497A

Description

Jan. 19, 1965 L. HOLMES FLUID MIXING DEVICE 2 Sheets-Sheet 1 Filed Jan. 10, 1963 3 2 4 Q 3 3 1 5 7//// g 2 4 2 I 0 2 6 I l 3 In-I l c n 6' l flllln a o F .l 2 G40 7 6 54 2 3 2 3 32 5 5 4 m m m 1 3 54 2 7 l 34 44 W 7 M. 6 2 2 3 3 2 a Br I 5 b 6 o o .l 4

an" I G 3 m R B 3 5 F C I l m B 4 m 5 a m w. vvvv N .3. 9 9%.

INVENTOR.

' LAMBERT HOLMES ATTORNEY.

3,166,686 FLUID MEXENG DEVICE Lambert Holmes, (Jreve Coeur, Mm, assignor to Bela Deutsch, Herman Deutsch, and Qarl Deutsch, doing business as Standard Machine 3; Manufacturing Co. Filed lan. it), 196?, Ser. No. 250,713 14 Claims. (Ql. 137217) This invention relates generally to improvements in a fluid mixing device, and more particularly to an improved device of this type that enables selectively the mixing of a liquid detergent with a stream of water.

An important object is to achieve a fully automatic fluid mixing device that is adapted to induct a liquid detergent into a stream of water and to mix such detergent and water in the desired proportion.

In the conventional installation of one type of this device, the proportioner is attached to the kitchen sink faucet and a small hose connects the device to a detergent supply normally located beneath the sink. A foot valve in the hose inlet serves to keep the hose full of detergent at all times. In another type of device, the automatic liquid controller is mounted to the side of a dishwashing machine over the wash tank, draws a liquid product from any size container and discharges it directly into the wash tank. The flow is timed and actuated by a very small flow of Water bled from the final rinse line. 7

In most water supply systems, there is the possibility of transient conditions that could create a partial vacuum inside the water lines. During such an occurrence, there is a reverse flow through an open faucet or other opening between the atmosphere and the inside Water supply lines. This reverse flow is commonly called back-syphonage. The use of the heretofore conventional fluid mixing device not having a protective mechanism could cause contamination of the water supply, as for example, by the introduction of detergent under these conditions.

As a precaution against the possible contamination of the water supply, many cities require the installation of a vacuum breaker between the water supply and any attachment that is a potential source of contamination. To protect a simple faucet attachment is both cumbersome and relatively costly.

It is an important object to provide a fluid mixing device that is constructed so as to preclude detergent or other foreign or undesirable liquid matter from being introduced into the water supply upon the occurrence of a partial vacuum in the water lines. The present proportioner has means that cause the device automatically to disconnect operatively from the liquid detergent and instead causes the faucet to communicate operatively with the atmosphere upon the existence of any vacuum in the water line to which the proportioner is attached.

Another important object is realized by the provision of an air chamber open to atmospheric pressure between the inlet opening to the valve body and the faucet which provides the above mentioned protective action against back-syphonage.

An important objective is achieved by the provision of a nozzle in the valve body passage including a main channel therethrough with an inlet aligned with the spaced partition aperture, the nozzle providing at least one auxiliary channel in the passage to receive any excess Water flow.

, Another important object is realized by an inclined wall on the inlet end of the nozzle which extends outwardly in the direction of flow toward the auxiliary channel so as to deflect excess Water flow laterally into such auxiliary channel. This structure precludes excess flow from splashing into and thence out of the chamber constituting a part of the vacuum breaker.

Other important advantages are afforded by making the main channel slightly smaller in cross section than the partition aperture and yet proportioned to acccommodate' substantially all of the fluid flow during proportioning operation upon formation of a vacuum, the excess fluid being deflected into the auxiliary channel upon breaking the vacuum.

An important object is realized by the nozzle construction in which opposite sides are spaced from the valve body to provide a pair of parallel auxiliary channels inthe passage externally of the nozzle, and in whichthe nozzle is provided with an inverted substantially V-shapedwall the apex of which is substantially centered with the inlet to the main channel and which extends outwardly in the direction offlow to the opposed auxiliary channels.

Another important objective is achieved by arranging the outlet of the auxiliary channel adjacent the outlet of the main channel and directing the flow of such channels a in connection with the accompanying drawings, in which:

FIGURE 1 is a cross sectional view of the device as seen in a plane passed through the vertical longitudinal axis;

FIG. 2 is a cross sectional view as seen in a plane passed through the vertical longitudinal axis at a right angle to the view of FIG. 1; FIglG. 3 is a bottom plan view ofthe device shown in FIG. 4 is a cross sectional view of a'm'odified device as seen in a plane passed through the vertical longitudinal axis, and 1 FIG. 5 is a fragmentary cross sectional view of the device shown in FIG. 4 as seen in a plane passed through the vertical longitudinal axis at a right angle to the ,view of FIG. 4.

Referring now by characters of reference to the draw-l ings, and first to FIGS. 1+3, inclusive, it is seen that the fluid mixing'device is of the type adapted to be attached to a Water faucet (not shown) The device includes a cylindrical cap 10 that is provided withinternal threads 11 at its uppermost portion, such threads 11 being adapted to engage a compatible fitting (not shown) for attachment to the water faucet. A partition 12 extends across the cap 10. Located in the upper recess of cap 10 and seating on the partition 12 are a pair of resilient washers 13, such washers 13 assuring a tight-fitting seal.

The cap 10 is provided with. a skirt portion 14 dependis provided in partition 12 through which the water under pressure from the faucet is forcibly ejected in a jet stream. A valve bodylfi includes a reduced uppermost portion 17 that interfits the skirt portion 14 of cap 10. A plurality of screw fasteners 20 attach the skirt portion 14 to Y the reduced portion 17 of valve body 16. It is seen that the skirt portion 14 seats on a shoulder formed by the re- V 7 a such chamber 21 under atmospheric pressure. Each of theopposed side surfaces 22 of valve body 16 is provided with a pair of longitudinal grooves 24 extending from the bottom to the top of the valve body 16,.suchgrooves 24 I being in communication with the chamber 21.

Th'eflvalve body 16 is providedwith a primarypassage 25. An inlet opening 26 .to the primary passage 25 is located on the opposite side. of chamber 21 from aperture 15, andhence is maintained in spaced relation to such aperture 15. However, it .is seen that the inlet opening 26 is directly aligned with the partition aperture so that the stream ofwater flowing through partition aperture 15 entersv the inlet opening 26 for flow through the. primary passage 25.. p 7 r A nozzle 27 is disposed in the primary passage Zi-such V nozzle 27 including a mair'i channelv 3t) 'therethrough, the

inlet 31 of which is aligned directly below ,theIpartition aperture 15 to receive the how therefrom as'it-crossses the air chamber'21. The inlet end of the nozzle 27 is lo cated behind or belowthe inlet- 26 of the primary passage 25. :The main'channel 3t] converges slightly downward- 1y from .its inlet 31 to a restricted portion 32 at which point the stream of water has its greatest velocity and lowest pressure.- The main channel 39 is provided with an outlet 33, at the bottom'end of the nozzle.

For reasons which will later appear, the main channel 30 is of slightlysmaller cross section than the'partition aperture 15 and yet is proportioned to accommodate all of the fluid flow during proportioning operationupon formation ofa vacuum in the restricted portion 32. This will of course necessitate an excess fluid that will not be accommodatedbythe main channel 30 upon breaking the vacuum. I i

The nozzle 27 includes opposite flat sides 34s'paced from thevalve body. to provide a pair of auxiliary channels 35 in the passage externally of thenozzle 27. Each of the auxiliary channels 35 is provided with an outlet 29 immediately adjacent the lower end of the noz'zle 27 and-immediately adjacent the outlet 33offthe main channel 30, the flow from the main channel -and auxil iary channels mergingin the primary passage 25 be- V fore discharge from. the valve body through'the. passage outlet-28. The auxiliary channels 35 direct the excess fluid flow inthe same direction as the jet flow from the main channel 30. Because of the structural relationship; the jet-flow from the main channel 30 induces flow through and from the auxiliary channels 35. i The other opposed -sides .36 of the nozzle the valve body 22 defining the walls of the primary passage 25. The upper end ofthe nozzle 27 is provided with an inverted V-shaped wall 37 the apex of which is cen-. tered with the inlet 31 and which extends outwardly in.

the direction of'flow tothcauxiliary channels 35. Any

excess fluid flow from the partition aperture 15,. i.e., that portion of thefiow not accommodated by the main channel 3t), strikes the inclined'wall 37 and is deflected later-, ally into the auxiliary channels 35. It is seen that water.

cannot and-does not under 'all conditions splash into the air chamber 21 and hence out of the passageway-'23. All of the fluid tlow passes directly through thevalve body for discharge. 7

An air induction passage4t) is provided in the valve body 22 and in one side wall 36of'the nozzle 27, the air inductionpassage 40 has an outlet that communicates with the main channel 30 at the restricted portion 32.

27 engages its outermost open position.

Formed in valve body 22 and in the other side wall 36 of the nozzle 27 is a'liquid induction passage 46 communicating with ,the'main channel 30 just below the restricted; portion 32 and having an outlet directly aligned with the outlet of the air induction passage 40. A fitting 47 is threadedly attached to the valve body 22 and communicates directly withthe liquid induction passage 46. The fitting 47 is adapted to receive and retain the hose (not shown) leading from the liquid detergent supply.

' A metering screw 5% is threadedly attached to theva lve body 22 in a bore that intersects the liquid induction pas- I sage 46.. As is best seen in FIG. 1, the screw 59 carries an O-ring 51 that provides a seal between the screw and its bore, thus preventing leakage of the liquid'detergent from the liquid induction passage 46 and past the screw .59.

As is best seen from FIG. 1, the position of the metering screw Ed'can be regulated uponthreaded adjustment 7 so as to'open o'r close the liquid induction passage, 46 to a greater or lesserextcnt as desired.

The valve body 22 is provided with a reduced lower 7 portion 52 through which the primary passage 25 discharges. Retai'ned on the lower body portion 52 is a screen retainer 53 thatcarries and positions a screen 54 below the primary pass-age 25..

' It is'thought that the mode of operation and functional results of the device disclosed in FIGS. 1-3 inclusive have become full an arent from the foregoin detailed description of parts, but for completeness of disclosure,

which it is directed into the inlet 31 of the main channel "The waterstreain bridges air chamber 21. Asthe water flows through the main channel 30 it passes through the. restricted'portion 32 and is emitted through the otztletfid 'inthe bottom ofnozzle .27. Because the air. induction passagedti is open to. atmospheric pressure, thereis no liquid detergent induced into thewaterstream.

- Any excesswater flow from the partition aperture 15 strikes the inclined wall 37 and is deflected laterally into the auxiliary channels 35 through which it is directed until it isrnerged with the jet flow from themain channel 36 for discharge from the valve body.

When it is desired to mix detergent with the water, the button 42 is. depressed until it engages the valve seat 43 and closes the air induction passage 49. Under these circumstances, the low pressure value existing at the re- A button retainer 41 is attached to the valvebody 22 lustrated in FIG. 1. A pair of inlet openings 45 are,

shown on opposite sides'of the button retainer 41, each of the inlet openings 45 being in communication with the A valve seat 43 surrounds; l

stricted channel portion 32' causes the liquid detergent to how through the liquid induction passage 45 and into' the main channel 30 where it mixes withthe water'strearn' 'the low pressure value existingat the outlet of the air induction passage-4t adjacent the'restricted-channel portion 32 and exerted on -one side of the valve button42 and the atmospheric pressureexisting on the other side of button 42; causes the button 42*to remain seated in continues through the main channel 3%.

closed position automatically'as long as the flow of'water .If it is desired to-discontinuethe mixing of liquid dc tergent with the Water. stream, the water faucet valve is closed so as to'stop the water flow-through the main V channel 3% When this action'is accomplished, the pressure value at the restricted portion 32- and the outlet of v the air induction passage 40 is equalized to atmospheric pressure; Then the spring 4drurges the valve button 52;.

" seous to its open position illustrated in FIG. 1. Then the faucet valve can be reopened to continue the flow of water under pressure through the main channel and the auxiliary channels 35, in which event'the air induction passage remains open so' as to cause a flow of air through such passage 41 to mix with the water stream rather than causing any induction of liquid detergent.

In order to introduce detergent again into the water stream, the button 42 must be depressed again to close the air induction passage 4% as previously described.

It for any reason a partial vacuum wouldexist in the water supply line when the fluid mixing device is used, there is a provision that would preclude the introduction of liquid detergent into the reverse flow of water. In other words, this mixing device precludes any backsyphonage of detergent into the'water supply line upon the occurrence of any vacuum conditions.

For example, it is seen that if the valve button 42 were depressed to a closed position and liquid detergent were being introduced into the water stream, and then a condition would occur whereby a vacuum in the water supply line would cause a reverse flow, it is seen that the existence of the air chamber 21 between the partition aperture 15 and the inlet 31 prevents reverse flow through the main channel 3!) and inlet opening 31., As mentioned previously, the chamber 21 is under atmospheric pressure .by reason of the passageways 23 formed between the casing skirt portion 14 and the valve body 22. Reverse flow of water in the water line would merely cause air to be drawn through the passageways 23 into the chamber 21, and thence into and through the partition aperture 15 in the direction of reverse water flow; It is seen that upon the existence of a vacuum in the water line, the flow of water through the main channel 38 and auxiliary channels 35 is stopped, resulting in an equalization of pressures. Then there would be no chance in any event of liquid detergent entering the main channel 30.

Referring to FIGS. 4 and 5, a modified fluid mixing device is illustrated that is adapted to feed detergent automatically into a dishwashing machine. Many of the parts correspond and are equivalent to the structure disclosed in FIGS. 1-3 and therefore corresponding terminology will be used where possible.

The device includes a cap 55 having external threads 55 on its upper end. A fitting 57 is threadedly attached to the cap 55 on threads 56 and is adapted to connect the cap 55 to a tubing 69 that is in turn directly connected to the final rinse line (not shown) of the dishwashing unit. A screen 61 is held Within the cap 55 to remove impurities.

A partition 62 extends across the cap 55. ture 63 is provided in partition 62 through which the water under pressure from the rinse line and tubing 64 is forcibly ejected in a jet stream. The cap 55 is provided with a skirt portion d- 'depending peripherally about the partition 62. I

A valve body 65 includes a reduced uppermost portion 66 that interfits the skirt portion 64 of cap 55. .A plurality of screw fasteners 67 attach the skirt portion 64 to the reduced portion 66 of valve body 65. It is seen that the skirt portion 64 seats on a shoulder formed by the reduced valve body portion 66 and extends below the uppermost surface to provide a splash guard. The uppermost end of the valve body 65 is spaced from the partition 62 to provide an air chamber 70 therebetween.

As is best seen in FIG. 5, the valve body 65 is provided with opposed flat surfaces 71 that are spaced from the skirt portion 64 of cap 55 to providerpassageways 72 communicating with air. chamber 70 so. as to place such chamber 70 under atmospheric pressure.

The valve body 65 is provided with a primary passage 73 the inlet 74 of which is located on the opposite side of chamber 7% from aperture 63, and hence is maintained in spaced relation to said' aperture. However, it is seen An aper 5 that the inlet 74 is directly aligned with the partition aperture 63 so that the stream of water flowing through partition aperture 63 enters the inlet 74' of the primary passage 73.

It will be noted that in this embodiment, the primary passage 73 includes a substantially vertical passage portion 75 and a right angularly related, substantially horizontal passage portion 76 having an outlet at the side of the valve body 65. A fitting 77 is attached to the valve body 65 and communicates with the outlet of the horizontal primary passage portion 76, the fitting 77 carrying a line 39 that serves to direct the discharge from the mixing device into the dishwasher.

Disposed in the vertical primary passage portion .75 is a nozzle 81 having a substantially vertical main channel portion 32 and a right angularly related, substantially horizontal main channel portion 83 having an outlet 84 communication axially Withthe horizontal primary passage portion 76. channel portion 32 is directly aligned with the partition aperture 63 so that the stream of water flowing through the partition aperture 63 enters the inlet 85 and flows through the

main channel portions

82 and 83. The vertical main channel portion 82 is provided with a re stricted portion 86 at which point the stream of water has its greatest velocity and lowest pressure.

The nozzle 81 includes opposed flat sides 87 that are spaced from the valve body 65 defining the substantially vertical primary passage portion 75 in order to provide a pair of opposed, parallel auxiliary channels 90 as is best seen in FIG. 5. Each of the auxiliary channels 90 is provided with an outlet 91 that communicates directly with the substantially horizontal primary passage portion 76 immediately adjacent the outlet 84- of the main chan nel portion 83. It will be understood that the discharge from the

main channel portions

82 and 83 and the auxiliary channels 90 is into the passage portion 76 axially in the same direction for flow through the line 80. Because of the structural arrangement, the jet flow fromthe main

chan nel portions

82 and 83 induces flow through the auxiliary channels 90 and thereby keeps the auxiliary channels 90 free flowing. The auxiliary channels 90 might otherwise back up with excess water flow because of the angular relationship of the

primary passage portions

75 and 76. a

The upper end of the nozzle 81 is provided with an inverted substantially V-shaped wall 92, the apex of which I is centered with the inlet 85 of the main channel. Any

excess water flow that is not accommodated by the main channel will strike the inclined wall 92 and be deflected.

laterally into the auxiliary channels 9%. Again, for more efiicient operation, the cross section ofthe main channel is slightly less than the cross section of the partition aperture 63. As a result, there mightbe an excess of water. flow that must be handled without having such water flow splash up into the air chamber 70 and splash to receive and retain the hose (not shownlleading from the liquid detergent supply. I

It is thought that the mode'of operation and functional results of this modified embodiment have become fully apparent from the foregoing detailed description of-parts, but for completeness of disclosure, it will be'noted that the fluid mixing device of FIGS. 4 and 5 is attached to the final rinse line of a dishwasher and the liquid detergent hose (not shown) is connected to the fitting 94.

Upon operation of the dishwasher, andupon start of the final rinse cycle, water flows through line 6t} and hence through the fluid mixing device under pressure;

The inlet 85' of the vertical main;

. :7 The water streams through the partition aperture 63 from which it is directed into the inlet .85 of the main channel portion 82. The water stream bridges air chamber- Ytlhl As the water flows through the main channel portion 82, it passes through the restricted portion 85, the

horizontal channel portion 83, and is emitted through the discharge line $0.

Any exeesswater flow from the partition aperture 63 strikes the inclined wall 92 and is deflected into the.

V auxiliary channels 90.

out through the passageway 72, except for the fact that the jet flow from the outlet 34 of the horizontal main channel portion 83 has suflicient velocity to create a partialvacuum that draws the water from the auxiliary channels 94? and discharges it through the line 8% When the fiow of fresh water to the dishwasher tank is stopped, there is no flow through the

main channel portions

82 and 83 of the nozzle 81, and therefore the flow of liquid detergent is halted, 1

It will be also noted that this unit also precludes any back-syphonage into the source of fresh water for the reasons discussed above with respect to the other embodiment of FIGS. 13.

Although the invention has been described by making;

detailed reference to two embodiments, such detail is to be understood in an instructive, rather than many restrictive sense, many variarrts being possible within the scope of the claims hereunto appended. 1 claim as my invention: 1. In a vacuum breaker for afluidmixing device: (a) a cap adapted tobe attached to a source of fluid under pressure, V (b) a partition across said cap,

(c) a valve body attached to said cap and spaced from 7 said partition to provide a chamber therebetween, (d) means communicating with said chamber to (place said chamber under atmospheric pressure, (e) the partition being provided with an aperture at one side of said chamber,

(1) the.v valve body being provided with a passage at the opposite side ofsaid chamber, 7 V V (g) a nozzle disposed in said passage having a main channel thcrethrough with an inlet aligned with said aperture, and v (h) said nozzle providing at least one auxiliary channel in said passage, the said nozzle havingits inlet end spaced inwardly of the entrance to said passage so that the deflection of the excess fluid flow to said auxiliary channeloccurs in said passage,

(i) the flow of fluid'being through said partition aperture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel.

2. In a vacuum'breaker for afluid'mixing device I (a)'r.a cap adapted to be attached to a source of fluid V under pressure, 1

(b) a partitionacross said'cap,

Q (0) a valve body attached to said capand spaced from said partition to provide a chamber therebetween, (d) means 'communicating with said chamber to place said chamber under atmospheric pressure,

(a) the partition being provided with an aperture'at 7 one side of said chamber, 7 (f) the valve body being provided with a passage at &the opposite side of said chamber,

Vii (g) anozzle' disposedin said passage having'a main i sueepee aperture, and

(/1) said nozzle providing at least one auxiliary channel in said passage, said nozzle having its inlet end provided with an inclined wall extending from said inlet outwardly in the direction of flow toward said auxiliary channel so as to deflect excess fluid flow laterally into said auxiliary channel,

(i) the flow of fluid being through said partitionap erture, across the chamber and intoisaid inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel.

3. In a vacuum breaker for a fluid mixing device:

(a) a cap adapted to' be attached to a source] of fluid under pressure, i

(b) a partition across said cap, I

(c) a valve body attached to said cap and spaced from said partition to provide a chamber therebetween, (d) means communicating with said chamber to place said chamber under atmospheric pressure,

(e) the partition being provided with one side of said chamber,

(f)'the valve body being provided with a passage at the opposite side of said chamber,

(g) a nozzle disposed in said passage having a main channel therethrough with an inlet aligned with said aperture, and t t (11) said nozzle providing at least one auxiliary channel in said passage, the nozzle having its inlet end spaced inwardly of the entrance to said passage, the inlet end of said nozzle being provided with an inclined wall extending from said inlet outwardly in the. direction of flow toward said auxiliary channel so as to deflect excess fluid flow laterallyinto said auxiliary channel, p

(z') the flow of'fluid being through said partition aperture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel.

4. In a vacuum breaker for a fluid mixing device:

(a) a cap adapted to be attached to a source of fluid under pressure,

(b) a partition across'said cap,

(c) a valve body attached to said cap and spaced from said partition to provide a chamber thercbetween, (d) means communicating with said chamber to place said chamber, under atmospheric pressure,

(a) the partition being provided with an aperture at oneside of said chamber, 7

(f) the valve body beingprovided with a passage a the opposite side of said chamber,

(g) a nozzle disposed in said passage having a main channel therethroug'h with an inlet aligned with said aperture, the main channel having a restricted portion, j

(It) said nozzle providing at least one auxiliary channel in said passage, V

,(i) the' flow of fluid being through said partition aperture across the chamber and into said inletifor movement through the main channel, any excess 'fluid' flow moving along said auxiliary channel,

(j) a liquid induction passage in said body and nozzle communicating with said restricted portion,

(k) an air induction passage in said body and nozzle communicatingwith said restricted portion, and

(l) valve means in the air passage selectively closing or opening said air passage to form or relieve a vacuum respectively, a

5. In a vacuum breaker for a fluidr mixing device as defined in claim 4 in which:

(m) the said partition aperture and nozzle main chan nel are proportioned to accommodate substantially all of the fluid flow during proportioning operation upon formation of a vacuum when the valve is closed, and the excess fluid being deflected into said an aperture at amtes 9 auxiliary channel upon breaking the vacuum when the valve is opened.

6. In avacuum breaker for a fluid mixing device:

(5) a partition across said cap,

(c) a valve body attached to said cap and spaced from said partition to provide a chamber therebetween,

(d) means communicating with said chamber to place said chamber under atmospheric pressure,

(e) the partition being provided with an aperture at one side of said chamber,

(f) the valve body being provided with a passage at the opposite side of said chamber,

(g) a nozzle disposed in said passage having a main channel therethrough with an inlet aligned with said aperture, and

(h) the said nozzle having opposite sides spaced from the valve body to provide a pair of auxiliary channels in the passage externally of the nozzle, and the nozzle being provided with an inverted V-shaped wall, the apex of which is substantially centered with the inlet and which extends outwardlyin the direction of flow to the auxiliary channel,

(2) the flow of fluid being through said partition aperture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel.

7. In a vacuum breaker for a fluid mixing device:

(a) a cap adapted to be attached to a source of fluid under pressure,

(b) a partition across said cap,

(0) a valve body attached to said cap and spaced from said partition to provide a chamber therebetween, (d) means communicating with said chamber to place said chamber under atmospheric pressure,

(2) the partition being provided with an aperture at one side of said chamber,

(1) the valve body being provided with a passage at the opposite side of said chamber,

(h) said nozzle providing at least one auxiliary channel in the passage, the auxiliary channel having an outlet closely adjacent the outlet of the main channel and directing the flow in the same direction, the jet flow from the main channel inducing flow from the auxiliary channel,

(1') the flow of fluid being through said partition aperture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel.

8. In a vacuum breaker for a fluid mixing device:

(a) a cap adapted to be attached to a source of fluid under pressure,

(b) a partition across said cap,

(e) the partition being provided with an aperture at one side of said chamber,

(1) the valve body being provided with -a passage at the opposite side of said chamber,

(g) a nozzle disposed in the passage having a main channel therethrough with an inlet aligned with the aperture, the main channel having a restricted portion,

(11) the nozzle having opposite sides spaced from the valve body to provide a pair of parallel auxiliary channels in the passage externally of the nozzle, the nozzle being provided with an inverted V-shaped wall the apex of which extends outwardly in the direction of flow to the auxiliary channels,

.- (i) the flow of fluid being through said partition fape' rture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel,

(1') a liquid induction passage in. the body andnozzle communicating with the restricted portion, a

(k) an air induction passage in the body and nozzle communicating with the restricted portion, and- (l) valve means in the air passage selectively closing or opening said air passage to form or relieve a vacuum respectively.

9. In a vacuum breaker for a fluid mixing device as defined in claim 8, in which:

(m) the partition aperture and the nozzle main channel are proportioned to accommodate all of the fluid flow during proportioning operation upon formation of a vacuum when the valve is closed, the excess fluid being deflected into the auxiliary channels by the V-shaped wall upon breaking the vacuum when the valve is opened.

10. In a vacuum breaker for a fluid mixing device as defined in claim 9, in which:

(n) the auxiliary channels having outlets closely adjacent the outlet of the main channel and directing the flow in the same direction, the jet flow from the main channel inducing flows from the auxiliary channels.

11. In a vacuum breaker for a fluid mixing device:

(a) a cap adapted to be attached to a source of fluid under pressure,

(b) a partition across said cap,

(0 a valve body attached to said cap and spaced from said partition to provide a chamber therehetween, (d) means communicating with said chamber to place said chamber under atmospheric pressure,

(e) the partition being provided with an aperture at one side of said chamber,

(h) said nozzle providing at least one auxiliary channel in said passage, V 1

(i) the flow of fluid being through said partition aperture, across the chamber and into said inlet for movement through the main channel, any excess fluid flow moving along said auxiliary channel, and

(j) the main channel being of slightly smaller cross section thanthe partition aperture and yet proportioned to accommodate all of the fluid flow during proportioning operation upon formation of a vacuum, the excess fluid being deflected into the auxiliary channel upon breaking the vacuum.

12. In a vacuum breaker for a fluid mixing device as defined in claim 11, in which:

(k) the nozzle having its inlet end provided with an inclined wall extending from the inlet outwardly in the direction of flow toward the auxiliary channel to deflect excess fluid flow laterally into the auxiliary channel.

13. In a vacuum breaker for a fluid mixing device as deflned in claim 11, in which:

(k) the main channel having a restricted portion,

(l) a liquid induction passage in the body and nozzle communicating with the restricted portion,

(m) an air induction passage in the body and nozzle communicating with the restricted portion,

(:1) valve means in the air passage selectively closing or opening the air passage to form or relieve a vacuum respectively, and v (0) the partition aperture and nozzle main channel being proportioned to accommodate all of the fluid flow during proportioning operation upon formation of a vacuum when the valve is closed, the excess fluid (c) a valve body attached to said cap'and spaced from said partition to provide a chamber therebetween,

' (a') means communicating with said chamber to place.

said chamber under atmospheric pressure,

(a) the partition being provided with an aperture at one side of said chamber, I (f) the valve body being provided-with a passage at the opposite side of the chamber, the passage including an angularly related discharge portion having an outlet port at the side of the valve body, (g) a nozzle disposed in the passage having a main channel therethrough with an inlet aligned with the aperture, the main channel of the'nozzle having an angularly related portion communicating with an directing flow into the angularly related passage portion for discharge through'the passage oul'et', I

(h) the nozzle providing at least one auxiliary channel in the passage, the auxiliary channel communicating with the angularly related passage portion at the be 4 References Cited in the file of this patent 7' UNITED STATES PATENTS Boosey July22, 19.41 McDougall Jan. 8, 1963

Claims

1. IN A VACUUM BREAKER FOR A FLUID MIXING DEVICE; (A) A CAP ADAPTED TO BE ATTACHED TO A SOURCE OF FLUID UNDER PRESSURE, (B) A PARTITION ACROSS SAID CAP, (C) A VALVE BODY ATTACHED TO SAID CAP AND SPACED FROM SAID PARTITION TO PROVIDE A CHAMBER THEREBETWEEN, (D) MEANS COMMUNICATING WITH SAID CHAMBER TO PLACE SAID CHAMBER UNDER ATMOSPHERIC PRESSURE, (E) THE PARTITION BEING PROVIDED WITH AN APERTURE AT ONE SIDE OF SAID CHAMBER, (F) THE VALVE BODY BEING PROVIDED WITH A PASSAGE AT THE OPPOSITE SIDE OF SAID CHAMBER, (G) A NOZZLE DISPOSED IN SAID PASSAGE HAVING A MAIN CHANNEL THERETHROUGH WITH AN INLET ALIGNED WITH SAID APERTURE, AND (H) SAID NOZZLE PROVIDING AT LEAST ONE AUXILIARY CHANNEL IN SAID PASSAGE, THE SAID NOZZLE HAVING ITS INLET END SPACED INWARDLY OF THE ENTRANCE TO SAID PRESSURE