US 2389676 A
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Nov. 27, v194s. N M YHEW I 2,389,676
NONSIPHON SHAMPOO SPRAY-HEAD Filed Nov. 4, 1944 INVENTOR. N M AYH E w JAMES ATTOR NEYS Patented Nov. 27, 1945 UNITED STATES PATENT OFFICE NONSIPHON SHAMPOO SPRAY HEAD James N. Mayhew, Los Angeles, Calif. Application November 4, 1944; Serial No. 561,978
The present invention relates to improvements in a non-siphon shampoo spray-head, and it consists of the combinations, constructions and arrangements hereinafter described and claimed.
An object of my invention is to provide a nonsiphon shampoo spray-head in which the water contained in the hose leading from the spray head up to the Water pipe is retained in the hose so that a subsequent turning on of the water will cause the water to issue initially from the spray-head rather than a combination of ai and water. In the usual shampooing spray-head apparatus when the water is turned off a siphon action will take place to remove all of the water from the .hose. If now the Water is turned on again the air will be ejected from the sprayhead with the water and a series of sputterings of alternate ejections of air and water Will ensue until the entire hose is again filled with water. This is annoying to the person Whose head is being sprayed with water and frequently the force of the combined air and water is sufficient to splatter the water out of the basin and onto the clothes of the person and the attendant. My device prevents the siphoning of wate from the hose and therefore no air will be mixed with the water during the initial use of the device.
A further object of my invention is to provide a device of the type described which is extremely simple in construction and which is automatic in operation. A spring-pressed valve is used and will open under' the water pressure for permitting water to pass through the hose when the water is turned on, but as soon as the water is turned 01f the valve will instantly close and will retain the water in the hose. The device also has novel means for concaving the perforated diaphragm for directing the water in a coneshape and thus concentrate the water on the persons head.
Other objects and advantages will appear in the following specification, and. the novel features of the device will be particularly pointed out in the appended claims.
My invention is illustrated in the accompanying drawing forming a part of this application, in which:
Figure 1 is a vertical section through the device, portions being shown in elevation;
Figure 2 shows two parts of the device; and
Figure 3 is a diagrammatic showing of the device operatively connected to a water outlet.
While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the scope of the appended claims without departing from the spirit and scope of the invention.
In carrying out my invention I provide a hose indicated generally at A and this hose extends from the spray-head B to an outlet pipe C, see Figure 3. The outlet pipe communicates with the hot and cold water Valves l and 2 so that a turning on of either or both valves will cause water at the desired temperature to flow up- Wardly through the pipe C and enter the hose A through a connection 3. The water then flows down to the spray-head B which will now be described in detail.
An expander sleeve 4 is mounted in the end of the hose A and a ferrule 5 is slipped over the outer end ofthe hose. The ferrule 5 has a reinforcing annular rib 6 that acts as a stop for a sprayhead casing l, which is preferably cup-shaped in cross section and has a bent back portion 8 to provide a rim or head for the casing. The top of the casing 1 has a flanged end 9 that frictionally engages with the portion ll] of the ferrule 5 extending below the rib 6. Figure 2 shows the interior of the portion I0 threaded at H.
A thimble [2 has an exteriorly threaded portion l3- adapted to be screwed into the portion II for adjustably connecting the thimble to the ferrule. The thimble has a plurality of openings M in its cylindrical wall through which water may pass. A shoulder 15 is provided near the lower closed end of the thimble and a cylindrical screen l6 placed in the thimble rests on the shoulder. The thimble has a head I! with a cylindrical wall I8.
A spring valve is slidably mounted in the screen and it comprises a rubber seat I9 secured to a metal base 20 by a screw 2| or other suitable fastening means. A coil spring 22 bears against the base 20 and the lower end of the spring is received within the head IT. The spring is strong enough to keep the seat l9 resting against a valve seat 23 formed at the lower end of the sleeve 4 and the force of th spring is sufficient to hold the volume of water that remains in the hose A after the valves l and 2 are closed. The spring 22 will compress from the water' pressure as soon as the water is turned on and will move downwardly to permit the water to flow from the hose A. The wate will pass through the small openings in the screen and through the thimble openings l4 into the interior of the casing I.
A perforated diaphragm 24 has its outer rim formed into a flange 25 that has a press fit with the cylindrical wall 26 of the casing. The diaphragm has a central opening 21 for receiving the head I I and a flange 28 rimming the opening has a force fit with the wall I8 of the head. It will be seen that an adjustment of the thimble l2 with respect to the ferrule will cause the diaphragm to flex and it is possible to make the diaphragm concave so that water issuing from the openings 29 in the diaphragm will be directed into a cone for concentrating the water on the persons head.
From the foregoing description of the various parts of the device, the operation thereof may be readily understood.
Durin the flow of water through the device,
the water pressure will keep the valve [9 un-' seated. The openings 30 in the screen l6 are smaller than the openings 29 in the diaphragm 24 so that any foreign matter'passi'ngthrough the openings 30 will pass through the openings 29. No clogging of the casing or the diaphragm can result. From time to time the parts may be disassembled andthe screen removed for clean- When the rinsing operationisfinishedand the valves I and 2 are closed the valve l9 will instantly close and will trap the water in the hose A. A vacuum break indicated generally at 3! in the pipe C in Figure 3, permits air to enter the top of the pipe C so that the water in the pipe can drain out, When the valves l ancl'2 are turned onagain for subsequent use of the sprayhead, the water flowing into the pipe C will force the air out through the vacuum break 3|, The water in the hose A will extend up to the vacuum break 3|. Assoon as the new water flowing through the pipe-C strikes the Water in the hose A, the water pressure will be sufficient to open the valve I9 and the water in the hose will flow out. No 'air has been trapped in the hose and therefore there will be nosputtering of the water from the spray-head which would be the case where the water is mixed with air. -The vacuum break 3! is so designed that as soon as the water reaches it, thevnt will be closed automatically and prevent water issuing therefrom.
The spring-pressed valve therefor prevents air from being mixed withwater in the hose. The expanderin the hose end spreads the-hose. The hose itself when heated;by the hot water expands and makes a tight fit in the ferrule which will not come apart. The press fit of the diaphragm in the casing makes a'water-tight fit.
The device can be used a s a shower; head and the valve canbe removed if desired Thevalves l and 2 are used in connection with a basin 32 shown in-my patent on a Shampoo lavatory, No. 2,194,804, issued March 26, 1940. 7
Where the vacuum break 3| is not used in the pipe 0, the spray-head valve ill willstop a siphoning action under the following conditions. If the water should be shut off on a lower floor and then the valves I and 2 opened, the water in the pipe C is prevented from siphoning back into the plumbing of the building because the valve 1 9 is closed, The non-siphon spray head has been designed with two factors in mind: first, to prevent the water in the pipe C from siphoninginto the building plumbing when the water is shut off on a lower floor and the valves I and 2 are opened; and second, to retain water in the hose A when the vacuum break 3| is used. In connection with the first factor, should the sprayhead be in a basin of soiled water and siphoning take place when the valves l and 2 were opened, the soiled water would be sucked into the pipes carrying the fresh water. My valve l9 prevents siphoning and avoids this disadvantage,
1. In a spray-head, a casing, a water-conveying conduit communicating therewith, a perforated diaphragm for the casing, and means for flexing the diaphragm for directing water flowing therethrough into converging or diverging streams, said means including a cylindrical perforated membena spring-pressed valve slidable in said member, said valve being adapted to close the conduit when the pressure of the water flowing through the conduit drops below a predetermined point.
2. In a device of the type described, a water conveying hose, a sleeve placed within the end of the hose, a ferrule enclosing-the hoseportion receiving the sleeve, a perforated thimble adjustably connected to the ferrule, a'screen disposed within the thimble'for screening water passing from the hose and through the thimble, a spray-head casing carried by the ferrule, a perforated diaphragm carried by the casing'and connected to the thimble, whereby an adjustment of the thimble will flex the diaphragm in the desired direction.
3. In a device of the type described, a water conveying hose, a sleeve placed within theend of the hose, a ferrule enclosing the hose portion receiving the sleeve, a perforated thimble 'adjustably' connected to the ferrule, a screen disposed'within the thimblefor screening water passing from the hose and through the thimble, a spray-head casing carried by the ferrule, a perforated diaphragm carried by the casing and connected tothe thimble,=whereb an adjustment of the thimble will flex the diaphragm in the desired direction, the openings in thescreen being smaller than the openings in the diaphragni so that any foreign matter small enough to pass through the screen openings will pass through the diaphragm openings 4. In a device of the type described, awater conveying hose,"a sleeve placed within the-eh'd of the hose, a' ferrule'enclosing the h'ose'portl'on receiving the sleeve, a perforated thimblead- 'justably connected to the ferrule, a screendisposed within the thimble for screeningw'ater passing from the 'h'oseand through the thimble, a spray-head casing carried'by the ferrule, a perforated diaphragm carried by the casing "and connected to the thimble, whereby an adjustment of 'the'thimble will flex the diaphragn'i in the desired direction, a spring-pressedvalve in the thimble and adapted to seat against the sleeve for holding the water in the hose when the water pressure dropsbelow a predetermined point.