US2664314A - Spray nozzle - Google Patents

Description

Dec. 29, 1953 W. M. CISSELL SPRAY NOZZLE Original Fi led Nov. 22, 1943 INVENTOQ.

5 WlLLlAM M.C\55ELL BY him Patented Dec. 29, 195 3 SPRAY NOZZLE William M. Cissell, Louisville, Ky., assignor to W. M. Cissell Mfg. Company, Incorporated, Louisville, Ky., a corporation of Kentucky Original application November 22, 1943, Serial No. 511,353. Divided and this application November 16, 1949, Serial No. 127,684

3 Claims.

This application is a division of application Serial No. 511,353, filed November 22, 1943, now abandoned.

My invention relates to improvements in valves, and has particular reference to valves employed on water-spray irons and water-spray guns used in laundries and dry cleaning establishments.

This invention has -for its principal object to so construct the component parts of the valve that they can be manufactured and readily assembled at low cost, expeditiously taken apart with conventional tools by the user for cleaning and/or replacement of the precision parts on which wear and fouling finally occur and at very low cost of time and money.

Another object of my invention is to provide a valve of the packless type in which a diaphragm seals the high pressure chamber from the actuating chamber.

A further object of my invention is to provide a valve having the seat for the valve stem adjacent the discharge end of the discharge orifice, so as to eliminate chambers or conduits etc. on the discharge side of the valve stem in which condensation may occur and cause dripping.

Another object of my invention is to provide a valve of simplified mechanical construction and ofv sufficient sturdiness to withstand the extreme operating conditions encountered in laundries and dry-cleaning establishments.

The advantages of these and other objects will become apparent as the following description is read in connection with the accompanying drawing, in which:

Figure 1 is a plan view of a pressing iron equipped with a valve made in accordance with the teaching of my invention, which iron is ordi narily referred to as a water-spray iron;

Figure 2 is a side elevational view of Figure l.

v Figure 3 is a sectional view taken along lines 3-3 of Figure 1.

Figure 4 is a sectional view taken along lines 44 of Figure 1, and illustrated with the handle 1 and arm Ia removed.

Figure 5 is a partial sectional view on an em larged scale showing the valve "stem in engage- 'ment with the valve seat; and

I: collected in the chamber to provide the required pressure to discharge the condensation when the valve assembly is actuated. However, while this preferred construction and arrangement is described, it is to be understood that the teachings of this invention may be employed on valves intended for other purposes, and especially on valves for water-spray guns that are used independently of pressing irons, or for spray-guns generally, where it is highly desirable to provide uniform atomization and freedom from drip or liquid blow-off."

With further reference to the drawings, it will be apparent that the valve assembly at the forward end of the handle 2 comprises a casing or main body 4; bonnet or plunger guide 5; ad-

justing cap 6; actuating handle I; compression spring 8; reciprocating plunger 9; resilient diaphragm I0; valve-stem II; removable nozzle and valve seat I2; and removable filter plug I3.

Referring in particular to Figures 3 and 4, it

will be apparent that the main body 4 is fixedly secured to the conduit 3, and has a duct i4 communicating with the interior of the conduit 3.

The removable filter plug I3 has a-recess l5 communicating with the duct i4, and a filter medium l6, such as a fine wire mesh, closing the opening of the recess I5.

The removable plug 13 is threaded into the body member 4 and is provided with a suitable gasket H to seal the same to the body member. The plug l3 also has an external annular groove I8 communicating with a duct I9 in the main body, and an aperture 20 which provides a communication between the cavity I5 in the filter plug I3 and the annular groove It. Thus, fluid pressure entering conduit 3 passes into the duct l4, through the filter medium l5 and into the cavity i5, thence through the aperture 2!} into the annular groove I8 and then into the duct 19. The duct I9 communicates with'the valve chamber 2i and thereby the fluid pressure is conducted into the valve chamber 2 I.

The plunger guide 5, as shown in Figure 2, is secured to the body member 4 by a plurality of machine screws 22, and, as shown in Figures 3 and 4, the diaphragm I is disposed in a suitable recess in the plunger guide and clamped at its perimeter between the main body 4 and the guide member by a suitable ring formed on the upper surface of the body member.

The plunger 9 reciprocates in the plunger guide 5, and the compression spring 8 biases the plunger 9 downwardly. The adjustment cap 6 is threaded upon the plunger guide 5, thereby enabling the operator to adjust the spring pressure, and thus regulate the pressure required to actuate the lever 1. The lever I is pivotally mounted at 23 upon the plunger guide 5, and has an arm Ia extending through a slot in the side wall of the plunger guide, which arm engages the plunger 9 and raises the plunger when the lever "I is depressed.

With reference to Figure 3, it will be observed that the arm 1a is rounded, and that the plunger 8 has a rounded cavity receiving the rounded end of the arm, thus providing a ball and socket connection between the members.

The valve stem 1 l is threaded at its upper end, and this threaded portion extends through a central aperture in the diaphragm Iii. The threaded portion of the valve stem is threaded into the lower end of the plunger 9, and this serves to secure the valve stem and plunger together and to clamp the diaphragm between juxtapositioned faces thereof. The stem and plunger thusly assembled constitute a valve core.

The removable nozzle and valve seat i2 is threaded in the main body member :3 and is provided with a suitable gasket for sealing the same to the body member. It is also important to observe that the nozzle !2 has a central cylindrical cavity which receives the valve stem i i and permits the same to reciprocate freely therein.

The lower end of the valve stem is slightly larger in diameter than its cylindrical shank, and the enlarged head portion preferably has diagonal slots cut in its cylindrical face as shown in Figures 5 and 6 to provide for the passage of liquid from the back side to the front side of the enlarged head. The diagonal slots provide a twirling action to the liquid and steam, and greatly increases atomization of the liquid discharged through the central orifice 2t in the nozzle iii. In this respect it is also important to observe that the external face of the valve seat in nozzle l2 adjacent the orifice 24 is concave to assist in the formation of a fog or mist or atomized liquid discharged from the orifice 24.

With particular reference to Figures 5 and 6, it is important to observe that the wall at the lower end of the nozzle E2 is very thin to provide a minimum distance through the orifice 24 from the valve seat on the inner face of the lower end, to the external concave face of the lower end. This feature is an important contribution in my valve construction as it entirely eliminates condensation drip, when the valve is closed, and, by reason of this, and the relatively small space around the valve stem in the cavity of the valve seat, and the comparative small size of the chamber 2i, condensation or liquid blow-01f is also eliminated when the valve is first opened, thus providing uniform atomization from the instant of opening of the valve and until it is entirely closed.

With reference especially to the three paragraphs next above it will be noted that the relation of orifice 24 in the nozzle E2, the cylindrical cavity thereof that receives the enlarged lower end or head of valve stem must be maintained in concentric relation to provide the best formation of a fog or mist of atomized liquid discharged from the orifice. (The liquid serves as a lubricant). Therefore, precision dimensions of each of the parts are necessary. No such requirements pertain to the bore of guide 5 and plunger 9 that slides freely therein without a lubricant. It will be observed that by reason of the radial movement or play between the guide and plunger, with the valve stem and head depending therefrom, the head may center itself freely within the bore of the nozzle and of course without any tendency to bind. Obviously, the diaphragm, being of rubber, ofiers no impedence to the floating relation of these parts.

This construction of the guide bearing in the nozzle, independent of the main body or housing comprised of casing i and bonnet 5, provides for the use of a superior metal qualified for long service without corrosion, wear or burdening the product with prohibitive cost for material or precision processing. It should also be noted that this construction provides for the Wall surrounding the orifice being concavedly ground or lapped, through a simple inexpensive operation, to a knife edge thereby assisting materially in the attainment of the stated objects of this invention.

As also shown in Figures 5 and 6, the lower end of the valve stem H has a plug 25 secured thereto that is preferably made from a phenol aldehyde condensation product, and, as illustrated in Figure 5, the lower face of this plug provides the sealing face on the valve stem II that engages the sealing face of the valve seat I2.

I claim:

1. In a valve comprising a casing having a chamber therein provided with an inlet and a spray orifice communicating therewith and a nozzle detachably mounted on said casing; said nozzle having a cylindrical cavity concentric with the chamber of said casing a wall in which said spray orifice is located and a valve seat surrounding said orifice; a bonnet having a chamber therein concentric with the chamber of said casing; a resilient diaphragm held at its periphery between the casing and bonnet for sealing the bonnet chamber from the casing chamber; the combination of an axially-movable plunger mounted within the bonnet chamber for slidable engagement therewith and having its lower end secured to the diaphragm; a movable valve stem positioned in the casing chamber and having its upper end secured to said plunger and the diaphragm and is lower end equipped with a head and plug-valve, the head slidably engaged with said cavity so that the plug-valve will be engageable with the valve seat in said nozzle; a spring operatively associated with the bonnet and the plunger for biasing the plug-valve into engagement with the said valve seat to close the orifice; and an actuating member operatively associated with the bonnet and plunger for operating the movable members against the action of said spring means to open said orifice.

2. A valve structure comprising a casing having an axial-cylindrical passageway therethrough; a discharge aperture in the Wall thereof, an operating lever projecting into said chamher; a flexible diaphragm extending thereacross and dividing the casing into two chambers; a valve stem disposed in and slidably bearing against the cylindrical passageway of one of said chambers; a valve plunger disposed in and slidably bearing against the cylindrical passageway of the other chamber and secured to said stem with the diaphragm gripped therebetween in axial alignment to provide a valve core, a spring operatively associated with said casing and said core for closing said aperture after the operating lever has raised said core to open the aperture.

3. A valve structure comprising a casing having an axial-cylindrical passageway therethrough; a flexible diaphragm extending thereacross and dividing the easing into two chambers; a discharge aperture in the wall of one of said chambers; a valve stem disposed in and slidably bearing against the cylindrical passageway of the last designated chamber; a valve plunger disposed in and slidably bearing against the cylindrical passageway of the other said chamber and secured to said stem with the diaphragm gripped therebetween in axial alignment to provide a valve core; an operating lever projecting into said other chamber; a spring operatively associated with said casing and said core for closing said aperture after the operat- 6! ing lever has raised said core to open the aperture.

WILLIAM M. CISSELL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 523,727 Mersereau July 31, 1894 593,732 Burck Nov. 16, 1897 679,069 Croppi July 23, 1901 772,668 OBrien Oct. 18, 1904 1,081,102 Dyke Dec. 9, 1913 1,311,815 Harris July 29, 1919 1,561,646 Hull Nov. 17, 1925 1,672,366 Caldwell June 5, 1928 1,727,207 Kramer Sept. 3, 1929 2,298,680 Clark Oct. 13, 1942 FOREIGN PATENTS Number Country Date 477,212 Great Britain Dec. 20, 1937

Images