US2896864A - Injection nozzle - Google Patents

Description

y 28, 1959 v. M. JEMISON ET AL 2,896,864

INJECTION NOZZLE Filed May 19, 1958 INVEN TOR. Voz/vfr/i JfM/iOAAwflON/Z you/v6.

' 3 MM SM AT T ORNEX United States Patent INJECTION NOZZLE Volney M. Jemison and Don H. Young, Phoenix, 'Ariz., assignors to Thunderbird Engineering Company, Phoenix, Ariz., a corporation of Arizona Application May '19, 1958, Serial No. 736,194

2 Claims. (Cl. 239-451) This invention pertains to injection nozzles and is particularly directed to injection nozzles for use with solvent injecting devices and the like.

One of the objects of this invention is to provide an injection nozzle for dispensing a liquid in a finely broken up state to facilitate mixing with the receiving solution into which the liquid is to be injected.

Still another object of this invention is to provide an injection nozzle which atomizes a liquid to be injected into a solution so as to effect a highly efficient mixing with the solution.

It is also an object of this invention to provide an injection nozzle particularly adapted to injecting a solvent or wetting agent into the regular rinse water flow line of a dishwashing machine.

Further features and advantages of this invention will appear from a detailed description of the drawings in which:

Fig. 1 is an enlarged fragmentary sectional view of an injection nozzle incorporating the features of this invention, showing the nozzle in closed, non-flow position.

Fig. 2 is an enlarged fragmentary view showing the nozzle of Fig. 1, but in opening injecting position.

Fig. 3 is an enlarged perspective of the coil spring element of the injection nozzle.

As examplar of one embodiment of this invention there is shown an injection nozzle comprising the fitting having the usual pipe thread 11 for securing the injection nozzle unit into a fitting of a pipe line (not shown). The fitting 10 has the supply passageway 12 in which is tightly fitted the plug 13 having a passageway 14 communicating with the supply passageway 12 of the fitting 10. A diametrically disposed lateral passageway 15 is formed in the plug 13 and is in communication with the passageway 14 and opens outwardly at the ports 16 and 17 on the outside diameter portion 18 of the plug 13. The ports '16 and 17 are located between the conical surface 19 formed on the fitting 10 and the conical surface 20 formed on the head 21 of the plug 13.

A specially constructed coil spring 22 having normally 2,896,864 Patented July 28, 1959 tightly wound coils in contact at 23 is formed with conical surfaces 24 sloping inwardly at each end of the spring, these surfaces 24 engaging the mating conical surfaces 19 and 20 in liquid tight sealing relationship at all times. When no fluid pressure is being applied through the passageway 14 and ports 16 and 17, the spring assumes the position shown in Fig. 1 with the sides of the coils in tight closed contact as at 23. As pressure is applied through the ports 16 and 17, the spring is caused to expand under pressure in the area 25, the spring unwinding and elongating while its conical surfaces 24 slide outwardly on the conical surfaces 19 and 20. The coils thus separate as at 26 allowing the liquid to escape through these fine helical slots formed thereby and providing the desired atomizing action in the liquid discharged through the spring 22. Since the coil spring 22 can adjust itself on the tapered surfaces 19 and 20 for variations in fluid supply from the passage- Way 14, proper atomizing and mixing can be obtained over wide variations in liquid flow to thus provide all around high efiiciency. Also the device is self-cleaning as increased pressure due to material accumulating between the coils causes the spring to further expand and thus free the clogging material.

While the apparatus herein disclosed and described constitutes a preferred fonn of the invention, it is also to be understood that the apparatus is capable of mechanical alteration without departing from the spirit of the invention and that such mechanical arrangement and commercial adaptation as fall within the scope of the appendant claims are intended to be included herein.

Having thus fully set forth and described this invention what is claimed and desired to be obtained by United States Letters Patent is:

1. An injection nozzle comprising a fitting member having a pair of spaced facing conical surfaces, a tightly coiled coil spring having female conical surfaces on its end portions engaging said conical surfaces of said fitting forming a pressure chamber inside of said spring and between said conical surfaces of said fitting, and conduit means in said fittings in communication with said pressure chamber to supply fluid pressure in said pressure chamber to expand said spring so that the conical surfaces on the ends of said spring move outwardly of the conical surfaces of said fitting.

2. In an injection nozzle as set forth in claim 1 wherein said conical surfaces of said fitting and said coil spring remain in fluid tight contact for any expanded or retracted condition of said coil spring.

Melas June 29, 1915 Schlagintweit June 6, 1939

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