US3291395A

US3291395A - Aspiration spray device

Info

Publication number: US3291395A
Application number: US412429A
Authority: US
Inventors: Bernard C Sharp
Original assignee: INTERNAT PATENT RES CORP
Current assignee: INTERNAT PATENT RES CORP; INTERNATIONAL PATENT RESEARCH CORP; Melnor Industries Inc
Priority date: 1964-11-19
Filing date: 1964-11-19
Publication date: 1966-12-13
Anticipated expiration: 1983-12-13

Description

Dec. 13, 1966 B. c. SHARP 3,291,395

ASPIRATION SPRAY DEVICE Filed Nov. 19, 1964 2 Sheets-Sheet 1 INVENTOR Eff/144A? EVA/PP 0 ATTORNEY B. c. SHARP 3,291,395

ASPIRATION SPRAY DEVICE 2 SheetsSheet 2 Dec. 13, 1966 Filed Nov. 19, 1964 ATTOR NEY United States Patent Oflice 3,291,395 Patented Dec. 13, 1966 3,291,395 ASPIRATION SPRAY DEVICE Bernard C. Sharp, White Plains, N.Y., assignor to International Patent Research Corp., New York, N.Y., a corporation of New York Filed Nov. 19, 1964, Ser. No. 412,429 12 Claims. (Cl. 239-318) The present invention relate-s to an aspiration spray device, and in particular to one specially adapted for the spraying of lawnor garden-treating materials, although it is by no means limited in utility to such applications.

The use of aspiration for mixing and spraying purposes is old, and many different constructions have been proposed to accomplish this result. In general, where such prior art devices have been characterized by simplicity of construction, they have also been characterized by lack of flexibility of use, and conversely, Where such devices have been capable of use in different fashion-s, as, for example, by providing for the mixing of the aspirating material with the carrier fluid in different proportions (or selecting different materials for aspiration), they have been characterized by constructions which are complex, expensive, and unreliable, and require comparatively complex manipulation. There are control functions other than variation in mixing proportions which are desirable in devices of this type, among which may be mentioned the provision of a valve in the aspiration device to permit the flow of carrier fluid to be started and stopped, the ability to divert the carrier fluid into the aspiration material container for mixing or cleaning purposes, the ability to provide for a rinsing spray of carrier fluid with out any aspiration, and the production of a spray, with or without aspiration, the characteristics of which can be changed.

It is the prime object of the present invention to devise an aspiration spray device which is capable of accomplishing all of the above mentioned functions, which is characterized by a simple, sturdy and reliable construction the parts of which may be easily and inexpensively manufactured on a mass production basis and assembled with one another in a simple and substantially foolproof manner, and which, insofar as most of the controllable functions are concerned, permits selection of a desired mode of operation by the appropriate manipulation of a single control element. In particular, in the embodiment here disclosed the positioning of a single control element in a selected one of a plurality of operative positions provides for on-off control, selection of a desired mixing ratio, or of no mixing at all, when the device is on, or

diversion of the carrier fluid into the aspiration material container, all as desired at any given moment by the user of the device. Separate, but equally conveniently controllable means, are also provided for selecting the desired character of spray emanating from the device, thus permitting the character of the spray to be controlled independently of the mixing ratio which is selected.

In patent application Ser. No. 351,031 of March 11, 1964, entitled, Aspiration Spray Device, the inventors of which are myself and William Blasnik, and which is assigned to the assignee of the instant application, a spray device having many (but not all) of the above enumerated characteristics is disclosed. The construction of the present invention may be considered as an improvement thereon, in which the operative parts are so constructed and arranged as to be more readily manufactured and assembled, the arrangement of the parts being such as to facilitate control of the various functions performed by the device. In this latter regard the construction of the present invention provides for control both of the desired mode of fluid flow through the device (providing for onoff control, selection of a desired mixing ratio when the device is on, or diversion of the carrier fluid into the aspiration material container) and of the desired character of spray emanating from the device, both of these control functions being carried out at what is essentially a single location on the device, and by a substantially similar type of manipulation, to wit, movement in a similar manner and in similar directions of parts individually controlling each of the above enumerated general types of functions. In addition, the construction of the present invention is such as to conveniently permit the selection among a greater number of types of fluid flow through the device, without adding appreciably to the cost of the device.

To these ends, the spray device of the present invention comprises a member adapted to function as a cover for a container of aspiration material, means being provided to connect the source of carrier fluid, such as a conventional garden hose, to a carrier fluid inlet port connecting with a fluid flow passage extending to an exit opening at what may be considered an end surface of that member. A part of the member extends beyond to that end surface, and may define an open-ended housing portion. One or more aspiration openings may be provided in this part, and a comparatively wide opening may also :be provided therein. A fluid-flow control element is articulately mounted on the member so as to extend over the aforementioned part thereof, the control element having a plurality of passages therethrough the inlet openings of which are selectively movable, as the control element is moved, into registration with the exit opening of the fluid flow passage in the member. At least some of the passages in the control element extend through the element to an exposed end surface thereof. One or more of these through passages may be provided with branch openings adapted to register with a selected aspiration opening in the aforementioned member part when the through passage in question is in registration with the exit opening in the member. When the member is provided with the aforementioned comparatively wide opening, a passage may be provided in the control element which is adapted to communicate substantially only between that wide openign and the exit opening in the member when the control element is appropriately positioned.

A spray-modifying part is mounted on the control ele ment at the exposed end surface thereof, and it is adapted to be positionally adjusted relative to the control element so as to selectively bring differently configured deflector sections into registration with the outlet end of that through passage in the control element which is in registration with the exit opening in the member. The control element is adapted to be moved to a given operative position by grasping a portion thereof which is exposed beyond the member on which it is mounted, and the spraymodifying part is adapted to be moved by grasping a portion thereof which is located closely adjacent to the aforementioned exposed portion of the control element, as a result of which control of the type of fluid flow through the device and the character of the spray emanating from the device are accomplished substantially at the same portion of the assembly. In the preferred form here specifically disclosed, both the control element and the spray-modifying part are coaxially rotatably mounted, so that the control of the type of operation and of the character of the spray is accomplished by the same type of manipulation, e. g., rotation. The control element is preferably in the form of a turret having a desired plurality of independent fluid flow passages therethrough, each passage, when operatively positioned, giving rise to a different type of operation insofar as fluid flow is concerned, thereby making the construction readily adaptable to produce a wide variety of different types of operation, as well as permitting the device to be shut off, through the use of a single control element.

To the accomplishment of the above, and to such other objects as may hereinafter appear, the present invention relates to the construction of an aspiration spray device as defined in the appended claims and as described in this specification, taken together with the accompanying drawings, in which:

FIG. 1 is a top plan view of the aspiration spray device of the present invention shown in place on a container for aspiration material;

FIG. 2 is a side elevational view thereof, partially broken away, the container being shown only fragmentarily, the spray-modifying part being positioned with one of its deflector sections operative;

FIG. 3 is a view similar to FIG. 2, but with the control element rotated 90 from the position shown in FIG. 2, a second deflector section of the spray-modifying part being operatively positioned;

FIG. 4 is a view similar to FIG. 2, but showing the control element rotated 180, a third deflector section of the spray-modifying part being operatively positioned;

FIG. 5 is a view similar to FIG. 3, but showing the control element rotated 180 therefrom, a fourth deflector section of the spray-modifying part being operatively positioned;

FIG. 6 is a cross sectional view of the control element taken along the line 66 of FIG. 2; and

FIG. 7 is a three-quarter perspective exploded view of the parts.

The spray device of the present invention, as here specifically disclosed, is in the form of a cap or cover member generally designated 2 adapted to be removably received in any appropriate manner on the open neck 4 of a container, generally designated 6, which container is adapted to carry a supply of aspiration material, that is to say, material adapted to be mixed in predetermined proportions with a carrier fluid such as water. To this end the cap member 2 may be provided with an internally threaded flange 8 removably receivable on the externally threaded upper portion of the container neck 4. Forming a part of the cap member 2 is a conduit section 10 which extends out laterally therefrom and is provided with a fitting 12 to which a carrier fluid conduit, such as a water hose 14, is adapted to be connected. The conduit section 10 terminates at an end surface 16, and a fluid flow passage 18 is defined within the conduit section 10, communicating between the fitting 12 and an exit opening 20 formed in the end surface 16. A cap member part 22 extends beyond the end surface 16, and comprises a bottom wall 24 and an upper wall 26 which together define a housing portion open at the end thereof remote from the end surface 16. A notch 28 may be provided in the upper portion of the wall 26, and an index mark 30 may be formed or imprinted on the wall 26 so as to register with the notch 28.

The bottom portion of the conduit section 10 and the wall 24 cover the open upper end of the container 6 when the cap member 2 is in position thereon. A pair of

proections

32 and 34 extend down from the wall 24 at different distances beyond the end surface 16, those projections having passages therethrough designated 36 and 38 respectively, the lower ends of those passages being open. The upper ends of those passages, exposed at the upper surface of the wall 24, define upwardly opening aspiration passages 40 and 42 respectively of different sizes. As here shown aspiration passage 40 is smaller than aspiration passage 42.

Conduits

44 and 46, preferably in the form of flexible hollow rubber or plastic tubes, have their upper ends respectively received in the passages 37 and 38, their open lower ends extending down into the interior of the container 6. If desired, and as here specifically disclosed, the wall 24 may be provided with an additional opening 48 therethrough which is considerably larger than the aspiration openings 40 and 42, and which will permit comparatively free flow of fluid therethrough. The

openings

40, 42 and 48 are all differently spaced from the end surface 16 and are preferably located along a line extending from the end surface 16 to the open end of the housing portion defined by the wall 26.

The aspiration openings 40 and 42 are surrounded by recesses within which compressible sealing rings 50 and 52 respectively are received. The exit opening 20 in the end surface 16 is surrounded by a groove within which compressible sealing ring 54 is received. For additional sealing purposes, a groove 56 may be provided adjacent the periphery of the end surface 16, within which compressible sealing ring 58 is received. The central portion of the end surface 16 is provided with an internally threaded aperture 60.

The control element for determining the character of fluid flow through the device is generally designated 62. It comprises a body portion 64 which is adapted to be received within the open ended housing portion defined by the

walls

24 and 26. It has an axial passage 66 formed therein, through which a portion 68 of a shaft generally designated 70 is freely received, the end 72 of that shaft being threadedly received in the aperture 60 formed in the cap member 2. The shaft 70 has a radially enlarged portion 74 adapted to engage the axially outer surface 76 of the control element 62, thereby to retain the control element 60 in position within the housing portion defined by the

walls

24 and 26, with the inner end surface 78 of the control element 62 urged toward the member end surface 16 so as to engage and sealingly compress the

sealing rings

54 and 58, while at the same time the lower surface of the control element 62 is urged toward the wall 24 so as to engage and sealingly compress the sealing rings 50 and 52, the control element 62 being rotatable about the shaft portion 68.

A plurality of fluid flow passages are formed in the control element 62. In the form here specifically disclosed four such passages are shown, designated 80, 82, 84 and 86 respectively, but it will be understood that any desired number of such passages could be provided, as will become apparent hereafter. These passages are disposed circumferentially around the axis of the passage 66 in which the shaft portion 68 is rotatably received. The axially inner end of the control element 62 is defined by a wall 88. The passage 80, shown in operative position in FIG. 2, extends between an inlet end 90 and an outlet end 92, the former being formed in the axially inner surface 78 and the latter being formed in the outer end exposed surface 76 of the control element 62. A comparatively narrow passage portion a extends from the inlet opening to a wider passage portion 80b, and a branch opening 94 extends radially from the passage portion 80b adjacent the passage portion 80a to the radially outer surface of the control element 62, the branch opening 94 being so positioned as to register with the narrow aspiration opening 40.

The passage 82 (shown in operative position in FIG. 4), extends between inlet opening 96 and outlet opening 98, and comprises, from inlet to outlet, a wide passage portion 82a, narrow passage portion 82b, and wide passage portion 82c. Branch opening 98 extends from the passage portion 820 adjacent the passage portion 82b to the radially outer surface of the control element 62, and it is so positioned as to register with the wider aspiration opening 42. The passage 84 (shown in operative position in FIG. 5) extends substantially uniformly from inlet opening 100 to outlet opening 102, and no branch opening is provided. The passage 86 (shown in operative position in FIG. 3) extends from inlet opening 104 only part way axially through the control element 62, passage portion 86a then extending radially outwardly so as to register with the wide opening 48 in the wall 24.

The

inlet openings

90, 96, 100 and 104 for the passages 80-86 respectively are all equally radially disposed about the axis of rotation of the control element 62, so that as that control element 62 is rotated about the shaft 68 they will be selectively brought into registration with the exit opening 20 in the cap member 2, thereby rendering their respective passages operative. When the aspiration device is to be turned off the control element 62 is rotated so as to bring a solid portion of the wall 88 into registration with the exit opening 20. If plain spray is desired, with no aspiration, the control element 62 is rotated to its position shown in FIG. 5, in which the passage 84 is rendered operative, fluid passing from the hose 14 through the

passages

18 and 84 and escaping from the exit opening 102 at the exposed outer end of the control element 62. If aspiration is desired, the device of the present invention permits ready control of the degree of aspiration, that is to say, the amount of aspiration fluid which is entrained with the carrier fluid. If a small degree of aspiration is desired the control element 62 is rotated to the position shown in FIG. 2. In that event fluid flows at a high speed through the narrow passage portion 80a and then enters the wider passage 80b, aspiration taking place via the branch opening 94 which communicates with the narrow aspiration opening 40, aspiration fluid being sucked up from the container 6 through the tube 44. The carrier fluid with the aspiration fluid mixed therewith then escapes from the device via the exit opening 92. If a greater amount of aspiration is desired, the control element 62 is rotated to its position shown in FIG. 4, whereby operation is similar to that described with respect to FIG. 2, except that a greater degree of aspiration takes place because the aspiration opening 42 is larger than the aspiration opening 40. When the control element 62 is rotated to its position shown in FIG. 3, no spray of any type occurs, but the fluid flowing from the hose 14 is permitted to flow through passage 86, passage portion 86a and the wide opening 48 in the wall 24 into the interior of the container 6.

The control element 62 may readily be moved from one operative position to the other by grasping it at its axially outer exposed end and rotating it about a shaft portion 68, the control element 62 preferably being provided with a knurled radially extending portion 106 to facilitate this manipulation. The outer surface of the control element 62 may also be provided with suitable indicia 108 visible in the notch 28 (see FIG. 1) so as to give a ready indication to the user of the device of the type of operation for which the device is set.

The exit openings 92, 98 and 102 of the

passages

80, 82 and 84 respectively, all are exposed at the axially outer surface 76 of the control element 62 and they are all preferably equally radially disposed about the axis of rotation of that element. A spray-modifying part, generally designated 110, is mounted on the exposed end surface 76 of the control element 62 and is provided with a plurality of differently shaped deflector sections .112, 114, 116 and 118, which are adapted to be selectively brought into registration with the exit opening of the then

operative passage

80, 82 or 84 in the control element 62. As here specifically disclosed the spray-modifying part 110 has a central hub 120 which is rotatably received on axially outwardly extending section 122 of the shaft 70, and is retained in position thereon by means of nut 124 which is received on externally threaded tip 126 of the shaft 70. The spray-modifying part 110 is thus in effect carried by and is adjustably positionable relative to the control element 62.

The precise construction of the spray-modifying part, and the shapes of the deflector sections 112418, may be widely varied and, in and of themselves, form no part of the present invention. As here specifically disclosed the spray-modifying part is similar to one shown from a design point of view in pending design patent application Serial No. D. 77,738, filed December 10, 1963, in the name of John D. Beinert, entitled, Deflector, and assigned to the assignee of this application. Thus the body of the spray-modifying part is provided with a round aperture constituting the deflector section 112, a laterally elongated aperture defining the deflector section 114 the radially outer surface of which is inclined radially inwardly at 115, a deflector section 116 defined by a wide opening 128 from the radially inner portion of which lip 130 extends, the radially inner surface 132 thereof being inclined away from the axis of rotation of the part 110, and a deflector section 118 defined by a wide opening 134 the radially outer surface of which is inclined radially inwardly, at 136. When the spray-modifying part 110 is rotated so as to bring the deflector section 112 into registration with the exit opening 92, 98 or 102, as the case may be, of the then operative fluid flow passage through the control element 62, a jet-type spray is produced. When the spray-modifying part 110 is rotated to bring the deflector section 114 into registration with the operative exit opening from the control element 62, a narrow spray is produced which is partially directed downwardly by the surface 115. When the deflector section 118 thus registers with the operative exit opening in the control element 62, a wide spray is produced which is partially downwardly directed by the surface 136. When the deflector section 116 is in operative position a so-called shrub-type spray is produced.

The spray-modifying part 110 can readily be moved to operative position by grasping that portion of it which is exposed beyond the control element, and said portion may be provided with a knurled outer surface 138 to facilitate manipulation and with suitable indicia 140 which, when read from the top of the assembly, as is the indicia 108, will indicate to the operator the type of spray which the spray-modifying part 110 is positioned to produce.

From the above it will be seen that the operator, working from a single position, to wit, the forward portion of the assembly, can rotate both the control element 62 and the spray-modifying part 110 in order to give rise to the desired type of fluid flow through the device, including selection or rejection of aspiration and selection of the degree of aspiration desired, and also give rise to the desired type of spray emanating from the device, the setting of the device for both of these conditions being readily indicated at a single glance.

While the control element 62 has been here illustrated as provided with four fluid flow passages, three of which extend therethrough and two of which are designed to produce different degrees of aspiration, it will be apparent that, within space limitations, any desired number of passages can be provided therethrough to provide control of any desired number of different types of fluid flow, it being understood that if more than two aspiration passages are provided, a corresponding number of differently sized aspiration openings in the wall 24 would be provided. It will further be apparent that the number of differently shaped deflector sections provided on the spray-modifying part 110 may be varied widely, again as limited by space conditions.

The

tubes

44 and 46 through which aspiration fluid is sucked up depend in simple fashion from the wall 24. The control element 62 and the spray-modifying part 110 may readily be formed of suitable plastic material by means of a molding or casting operation, all at relatively low cost, particularly when large scale production is involved. Assembly of the device is the essence of simplicity, as will be clearly apparent from the description of the structure.

While but a single embodiment of the present invention has been here disclosed, it will be apparent that many variations may be made therein, all within the spirit of the invention as defined in the following claims.

I claim:

1. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface of said member, a part of said member extending out beyond said end surface, said member part having a narrow aspiration opening therethrough, and a control element movably mounted on said end surface of said member, extending over said member part, and having a plurality of passages therethrough selectively registering with said exit opening as said element is moved relative to said member, one of said passages opening to the end of said element remote from said exit opening in said member and having a branch opening registering with said aspiration opening when said one of said passages is in registration with said exit opening, and another of said passages extending uninterruptedly through said element and opening to the end of said element remote from said exit opening.

2. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface of said member, a part of said member extending out beyond said end surface, said member part having a narrow aspiration opening therethrough and a comparatively wide opening therethrough, and a control element movably mounted on said end surface of said member, extending over said member part, and having a plurality of passages therethrough selectively registering with said exit opening as said element is moved relative to said member, one of said passages opening to the end of said element remote from said exit opening in said member and having a branch opening registering with said aspiration opening when said one of said passages is in registration with said exit opening, a second of said assages communicating substantially only with said wide opening in said member part when said second passage is in registration with said exit opening, and a third of said passages extending uninterruptedly through said element and opening to the end of said element remote from said exit opening.

3. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface of said member, a part of said member extending out beyond said end surface, said member part having a plurality of narrow aspiration openings therethrough, each having a different width, and a control element movably mounted on said end surface of said member, extending over said member part, and having a plurality of passages therethrough selectively registering with said exit opening as said element is moved relative to said member, a plurality of said passages opening to the end of said element remote from said exit opening in said member and having a branch opening registering with corresponding ones of said aspiration openings when said passages respectively are in registration with said exit opening, and another of said passages extending uninterruptedly through said element and opening to the end of said element remote from said exit opening.

4. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface of said member, a part of said member extending out beyond said end surface, said member part having a plurality of narrow aspiration openings therethrough, each having a different width, and a comparatively wide opening therethrough, and a control element movably mounted on said end surface of said member, extending over said member part, and having a plurality of passages therethrough selectively registering with said exit opening as said element is moved relative to said member, a plurality of said passages opening to the end of said element remote from said exit opening in said member and having a branch opening registering with corresponding ones of said aspiration openings when said passages respectively are in registration with said exit opening, another of said passages communicating substantially'only with said wide opening in said member part when said other of said passages is in registration with said exit opening, and a third of said passages extending uninterruptedly through said element and opening to the end thereof remote from said exit opening.

5. The spray nozzle of claim 1, said element having an exposed end surface positioned remote from said exit opening in said member, to which end surface said passages in said element open, and a spray modifying part mounted on said end surface of said element so as to be movable relative to said element, said part having differently shaped deflector means thereon which are selectively movable into registration with a given control element passage, thereby to modify the nature of the fluid spray emanating therethrough.

6. The spray nozzle of claim 2, said element having an exposed end surface positioned remote from said exit opening in said member, to which end surface said passages in said element other than said second passage open, and a spray modifying part mounted on said end surface of said element so as to be movable relative to said element, said part having differently shaped deflector means thereon which are selectively movable into registration with a given control element passage, thereby to modify the nature of the fluid spray emanating therethrough.

7. The spray nozzle of claim '3, said element having an exposed end surface positioned remote from said exit opening in said member, to which end surface said passages in said element open, and a spray modifying part mounted on said end surface of said element so as to be movable relative to said element, said part having differently shaped deflector means thereon which are selectively movable into registration with a given control element passage, thereby to modify the nature of the fluid spray emanating therethrough.

8. The spray nozzle of claim 4, said element having an exposed end surface positioned remote from said exit opening in said member, to which end surfaces said passages in said element other than said other of said passages open, and a spray modifying part mounted on said end surface of said element so as to be movable relative to said element, said part having differently shaped deflector means thereon which are selectively movable into registration with a given control element passage, thereby to modify the nature of the fluid spray emanating therethrough.

9. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface thereof, an open-ended housing portion extending in a given direction from said end surface, said housing portion having at least one fluid flow opening therethrough, a control element received in said housing portion, exposed at the open end of said housing portion and mounted so as to be rotatable relative to said member about an axis substantially parallel to said given direction, said element having a plurality of fluid flow passages therethrough adapted to be selectively brought into registration with said exit opening, at least one of said passages having a branch passage communicating therewith which registers with said fluid flow opening in said housing portion when said one of said passages is registered with said exit opening.

10. A spray nozzle comprising a member having a fluid flow passage therethrough terminating at an exit opening formed in an end surface thereof, an open-ended housing portion extendingin a given direction from said end surface, said housing portion having at least one fluid flow opening therethrough, a control element received in said housing portion, exposed at the open end of said housing portion and mounted so as to be rotatable relative to said member about an axis substantially parallel to said given direction, said element having a plurality of fluid flow passages therethrough adapted to be selectively brought into registration with said exit opening, at least one of said passages having a branch passage communicating therewith which registers with said fluid flow opening in said housing portion when said one of said passages is registered with said exit opening, said element having an exposed end surface to which at least some of said passages open, and a spray modifying part mounted on said end surface of said element so as to be movable relative to said element, said part having diifercntly shaped deflector means thereon which are selectively movable into registration With a given control element passage, thereto to modify the nature of the fluid spray emanating from said passage.

11. The spray nozzle of claim 10, in which said control element and spray modifying part are c-oaxially mounted, said spray modifying part being rotatable relative to said control element.

12. The spray nozzle of claim 10, in which said control element and spray modifying part are coaxially mounted on a single shaft extending from said end surface of said member, said spray modifying part being rotatable relative to said control element.

References Cited by the Examiner UNITED STATES PATENTS 2,788,244 4/ 1957 Gilmour 239-318 2,788,245 4/1957 Gilmour 2393 18 3,112,885 12/1963 Bell et al 239-394 EVERETT W. KIRBY, Primary Examiner.

Claims

9. A SPRAY NOZZLE COMPRISING A MEMBER HAVING A FLUID FLOW PASSAGE THERETHROGUH TERMINATING AT AN EXIT OPENING FORMED IN AN END SURFACE THEREOF, AN OPEN-ENDED HOUSING PORTION EXTENDING IN A GIVEN DIRECTION FROM SAID END SURFACE, SAID HOUSING PORTION HAVING AT LEAST ONE FLUID FLOW OPENING THERETHROUGH, A CONTROL ELEMENT RECEIVED IN SAID HOUSING PORTION, EXPOSED AT THE OPEN END OF SAID HOUSING PORTION AND MOUNTED SO AS TO BE ROTATABLE RELTATIVE TO SAID MEMBER ABOUT AXIS SUBSTANTIALLY PARALLEL TO SAID GIVEN DIRECTION, SAID ELEMENT HAVING A PLURALITY OF FLUID FLOW PASSAGES THERETHROUGH ADAPTED TO BE SELECTIVELY BROUGHT INTO REGISTRATION WITH SAID EXIT OPENING, AT LEAST ONE OF SAID PASSAGES HAVING A BRANCH PASSAGE COMMUNICATING THEREWITH WHICH REGISTERS WITH SAID FLUID FLOW OPENING IN SAID HOUSING PORTION WHEN SAID ONE OF SAID PASSAGES IS REGISTERED WITH SAID EXIT OPENING.