US 2344150 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
March 14,1944. 5 JUDELL 7 2,344,150
PLUMBING FIXTURE Filed Aug. 22, 1941 Q 2' d NV TOR.
ATTORNEYS Patented Mar. 14, 1944 UNITED STATES PATENT OFFICE PLUMBING FIXTURE Julius S. Judell, Shorewood, Wis., assignor to Milwaukee Flush Valve Company, Milwaukee, Wis., a corporation of Wisconsin Application August 22, 1941, Serial No. 407,847
' tered in the plumbing art, due to so-called backfiow or back siphonage through certain types of plumbing fixtures, whereby contaminated and impure liquid was permitted to enter fresh water distribution pipes or systems. Such action may take place in various types of liquid supply devices the outlet or delivery ends of which may at times be submerged, such as direct flushing valves, underrim water supply connections to a plumbing fixture or receptacles wherein the water surface is exposed to atmosphere, and hose and spray fittings. While it is a relatively simple matter to obviate back-fiow or back-siphonage in fixtures having fixedly located liquid supply valves and dispensing nozzles, by merely providing a sufiicient air gap between the discharge orifice of the delivery spout or nozzle and the flood level rim or overflow of the basin or receptor for the liquid; the problem becomes far more complicated when the position of either the supply valve or of the nozzle discharge orifice, is variable in vertical location so that this orifice may at times be immersed in the liquid of the receiving basin, as in the case of a hose and spray fitting. In such fixtures the spray nozzle or head may be permitted to lie in the bottom of the liquid filled receptacle, when the supply of fresh liquid from the control valve or valves is interrupted, and back-flow may then occur.
It is therefore a more specific object of the present invention to provide improved instrumentalities for positively preventing back-flow or back-siphonage in hose and spray nozzle plumbing fixtures wherein the liquid delivery orifice of the nozzle may at times be immersed in liquid;
Another specific object of the invention is to provide an improved back-flow preventer of the type whose performance depends upon the automatic mechanical operation of relatively simple movable parts disposed wholly within the fixture with which the device is associated.
A further object of my invention is, to provide an automatically functioning back-flow prevention device, especially adapted for cooperation with a sink fixture having one or more stationarily mounted water supply valves for delivering liquid to a universally movable spray head or nozzle through a flexible tube associated with rigid conduit sections or portions of the valves and nozzle.
Still another specific object of the present invention is to provide various improvements in the construction and operation of liquid dispensing fixtures of the adjustable nozzle type, whereby the cost of construction is reduced to a minimum, while the utility and efiiciency thereof are enhanced to a maximum.
These and other specific objects and advantages of the improvement will be apparent from the following detailed description.
A clear conception of an embodiment of the invention, and of the mode of constructing and of utilizing sink fixtures built in accordance with the improvement, may be had by referring to the drawing accompanying and forming a part of this specification wherein like reference characters designate the same or similar parts. The single figure is a part sectional front elevation of a spray and hose sink fixture embodying one type of the improved back-flow preventer, and showing the same applied to a fragment of a sink.
While the invention has been shown and described herein as having been specifically applied to a special type of sink fixture having two fixed liquid supply valves adapted to deliver liquid mixturethrough a hose to a universally movable spray-spout nozzle, it is not my intention to thereby unnecessarily restrict the scope or utility of the improvement; and the term nozzle as used herein is intended to define any kind of liquid dispensing means such as a discharge spout, adjustable or non-adjustable spray head, or the like.
Referring to the drawing, the improved plumbing fixture shown therein comprises in, general, a pair of laterally spaced normally stationary and concealed liquid supply valves 7, 8 secured to the rear ledge of the sink 9 or other receptacle by means of clamping nuts l0 and each communicating with an independent inlet pipe II and with a common rigid J-shaped discharge conduit l2 firmly interconnecting the two valve casings I3; a universally movable spray-spout liquid dispensing nozzle l4 having one end provided with a manually adjustable disk I 5 for converting the discharge orifice Hi from a spray to a jet deliverer, or vice versa, while its opposite depending end I! is formed for pivotal and detachable association with a fixed pivot bushing IS, the nozzle orifice l6 and pivot end being connected by a rigid conduit [9 which is covered by an insulating handle 20; a flexible tube or elongated hose 2! extending through the pivot bushing l8 and normally confined beneath the sink 9, and having its opposite ends connected respectively to the conduits l2, I9; and a gravity actuated back-flow preventing non-return check valve 22 interposed in the rigid lower outlet portion 23 or shorter leg of the J-shaped conduit 12, between the valves 1, 8 and the hose 2|.
The liquid supply valves 1;8 have their casings l3 so interconnected by the rigid mixing conduit I2, that this conduit as well as the valves may be disposed beneath the ledge of the sink 9 and concealed thereby; and the valve casings i3, conduit l2, and lower central portion 23 may all be formed of an integral casting. Each of the improved supply valves 1,-8 comprises a vertically adjustable valve body or plug 24 cooperable with an annular seat 25 secured within the casing l3, and having-an actuating stem 25 coacting with a sealing device 21; and an ac tuating handle 23 'detachably secured to the upper extremity of the stem 26 by means of a screw 29, and having an escutcheon cap 39 firmly attached thereto. Each valve plug 24' has-external screw threads '3! coacting-with internal threads of itscasingl'S, so that when the valve stem 26 is rotated 'with'the aid of its handle 28, the corresponding plug 24 will move toward or away from its seat 25 depending upon the direction of rotation. The handles 29 may be marked as shown, in order to 'indicatethe character of the liquid controlled therebyyandthe escutcheon cups 39 may be formed of the same material as the nozzle handle 20, and serve to normally conceal the sealing device 2lwhile permitting convenient access thereto. 1 v f The improved spray-spout liquid dispensing nozzle I4 is adapted to be moved vertically and laterally in any direction; by virtue of its connection to the fiexible hose 2|, when the nozzle has been removed from the pivot bushing [8 as illustrated;' and the jet're'gulating disk I has an integral adjusting stem' 32: provided with screw threads 33 coacting with the nozzle casing 34, and provided with a manipulating cap 35, so that rotation of the. cap 35, stem. 32 and disk 55 will'convert the.delivered liquid either from a spray into a solidannular jet, or .vice versa, depending upon the direction of rotation. The nozzle i4 is however,v also. adapted to be utilized as a swing spout when the cylindrical rear depending pivot-end'portion l1 thereof .is inserted within the pivot bushing l3. I he bushing I8 is fixedly secured to the sink 9 midway between the valves 1, 8, by means-of-a clamping ring 36; and the nozzle portion I! may be provided with one or more notches 31 which are cooperable with a fixed pin 38 secured to the bushing l3 so as to positively prevent the nozzle M from swinging out of the sink basin 39 when the nozzle assemblage is being used as. a fixed or swing spout. 'The notches 31 may be elongated so as to permit limited lateral swinging of the nozzle M, or several notches 31 which snugly engage the pin 38 may be used in order to positively fix the nozzle in any one of several predetermined positions. a
The improved back-flow preventer shown and which comprises the gravity actuated ball check valve 22, is disposed directly between the conduit portion 23 and the inlet end of the hose 2|. This non-return check valve 22 may be confined within a fitting 49 to which the inlet end of the hose 2| may be attached by means of a union 4|, and this fitting 40 may also be provided with a closure cap d2 having a stop pin 43 thereon for preventing the ball valve 22 from closing off communication to the hose 2| when the non-return check valve is lifted from its seat by liquid under pressure issuing from the conduit portion 23. The cap 42 is removable so as to permit ready access to the ball valve 22, and the delivery end of the hose 2! may be connected to the nozzle portion H by means of another union 4!.
, The normal operation should be clearly apparent from the foregoing description, and it will be noted that the non-return check valve 22 will permit liquid under pressure to fiow freely from either or bothvalves l, 8 to the nozzle orifice I6, but will positively prevent back-flow or backsiphonage of liquid fromthe orifice -lii to either of the valves 1,8. 1 I q The improved fixtures are obviously simple and compact in construction, and are also devoid of unsightly exposed parts such as valve bodies, conduits and packing; elements. The valve bodies l3 and fixed connecting conduits are all permanently concealed beneath the sink 9; andwhen the convertible nozzle is being used as a spout, the flexible hose 2! is also; concealed. The supply valves 1, 8 are extremely simple and compact in construction, yet highly effective in use, and the structure is also simplified and improved inappearance by attaching the-escutcheon caps 39 directly to the handles -29. The appearance. of these; fixtures is also improved by forming the escutcheon caps 39 of'the same colored material usedas an insulating hand-1e. 20; for the nozzles, and these nozzles are readily convertible from a spout into a universally movablespray or rinser, and from a spraying fixture into a jet deliverin device. The present improved fixtures can be manufactured and sold at moderate cost, may be quickly and conveniently installed, and the improved back-fiow appliances can alsobereadily applied thereto at little expense. i s
It should be understood that it is not desired to limit this inventiontogthe exact detailsof construction, or to the precise modeof use, herein shown and described, for various modifications within the scope of the claim may occur topersons skilled in the art. it Y I claim: i
In a-plumbing fixture, a pair of liquid supply valves interconnected'by a rigid conduit having a rigid J-shaped tube depending therefrom and providing a single outlet between the valves,;& universally movable rigid liquid mixture dispensing nozzle adapted to be positioned above and below said valves and having an inlet connected to the shorter leg of said-J-shaped tube below the upper extremityof said leg by a flexiblehose, a gravity actuated non-return ball' check valve located insaid shorterrigid tube leg below and in advance of the inlet end of said flexible hose for positively preventing back-flow of liquid from said nozzle and hose to either of said valves through said conduit, and a removable cap normally closing saidupper end and being cooperable with said check valve to prevent its sealing the adjacent endof said;hose.-; y