US 3784113 A
A fire hose nozzle of the high constant gallonage class positions a cylindrical stream pattern sleeve for reciprocal motion around and about a beveled discharge orifice in the nozzle which includes a centrally positioned baffle. A rotatable dial on the nozzle has a cam channel therein engaging a detent on the cylindrical sleeve for imparting reciprocal motion thereto, the cam channel being so formed that rotation of the same to predetermined positions locates the pattern forming sleeve so as to provide a straight stream, narrow fog or wide fog patterns as desired.
Description (OCR text may contain errors)
United States Patent 1191 11] 3,784,113 Specht Jan. 8, 1974 [541 NOZZLE 26,186 11/1859 Hornig 251/251 972,431 10/1910 Be s ..251/251x  Invent: 3 spech" Charles Town 2,565,457 8/1951 sp l ldel' 239/456  Assignee: American La France Inc., Prim ry Ex minerM. Henson Wood Willoughby, Ohio  Filed: Sept. 11, 1972  Appl. No.: 288,017
 U.S. Cl 239/460, 239/541, 239/583, 251/251  Int. Cl B05b 1/30  Field of Search 251/251, 252, 256; 239/456, 459, 460, 539, 537, 541,583
 References Cited UNITED STATES PATENTS 2,991,016 7/1961 Allenbaugh, Jr 239/459 X 278,008 5/1883 Haley 251/251 X 3,244,376 4/1966 Thompson 239/456 X Assistant Examiner.10hn J. Love AttorneyWebster B. Harpman [5 7] ABSTRACT A fire hose nozzle of the high constant gallonage class positions a cylindrical stream pattern sleeve for reciprocal motion around and about a beveled discharge orifice in the nozzle which includes a centrally positioned baffle. A rotatable dial on the nozzle has a cam channel therein engaging a detent on the cylindrical sleeve for imparting reciprocal motion thereto, the cam channel being so formed that rotation of the same to predetermined positions locates the pattern forming sleeve so as to provide a straight stream, narrow fog or wide fog patterns as desired.
8 Claims, 4 Drawing Figures PAIENTEI] JAN 81974 snm 10F 2 NOZZLE BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to nozzles of the fire fighting type which are adjustable to selectively provide either a straight stream or a fine dispersion generally termed fog.
2. Description of the Prior Art Prior structures of this type move a centrally positioned baffle relative to a beveled discharge opening as in US. Pat. Nos. 2,552,445, 2,565,457, 2,806,741 and 2,938,673. Still other nozzle of the general type rotate a cylindrical sleeve on the exterior of the nozzle body as by following a thread pattern or similar configuration as in US. Pat. Nos. 2,552,445, 2,991,016 and 3,150,829.
This invention simplifies and improves the construction and the operation of the nozzle by reciprocating the stream pattern forming sleeve on the nozzle body relative to the discharge orifice and more particularly by imparting the reciprocating motion to the sleeve by a dial incorporating a cam channel of irregular pattern arranged so that equally spaced locations on the dial result in full stream narrow fog and wide fog patterns of ideal distribution pattern and without the necessity of hunting for a particular pattern desired.
SUMMARY OF THE INVENTION A fire fighting nozzle of the high constant gallonage class has a fixed nozzle structure with a beveled discharge opening and a circular baffle positioned adjacent thereto with a reciprocal stream pattern forming sleeve movable thereon by a control dial having a cam channel formed therein registering with and moving a detent on said sleeve, the configuration of the cam channel being such that predetermined equally spaced locations on the control dial result in predetermined desirable discharge pattern results when the nozzle is actuated and set by selecting the desired pattern on the control dial.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross sectional elevation of the nozzle.
FIG. 2 is a vertical section on line 22 of FIG. 1.
FIG. 3 is a side elevation of the nozzle showing the exterior thereof and the control dial and FIG. 4 is a side elevation of a portion of the nozzle seen in FIG. 2 with parts broken away and parts in cross section.
DESCRIPTION OF THE PREFERRED EMBODIMENT In the form of the invention chosen for illustration herein the nozzle consists of a body having an inlet end 11 and a discharge end 12 with a coupling 13 secured thereto about the inlet end 11 so that the nozzle can be attached to a coupling on a fire hose. The nozzle body 10 has a web 14 transversely thereof inwardly from the ends thereof which is centrally apertured as at 15 so as to receive and mount a stem 16 which supports a circular baffle 17 in spaced relation to an annular beveled surface 18 which defines a discharge orifice of the nozzle body 10. A pattern forming sleeve 19 is reciprocally mounted on the exterior of the nozzle body 10 and sealed with respect thereto by an O-ring 20. The upper end of the sleeve 19 has a plurality of circumferentially spaced, diamond shaped serrations 21 which serve to break up fluid passing through the nozzle and directed thereagainst by the baffle 17 into a fine dispersion known as fog. An annular rubber bumper 22 surrounds the serrations 21 in the outer end of the sleeve 19 and protect the same and is so shaped as to form an annular beveled extension of the angular base portions of the diamond shaped serrations 21.
Those skilled in the art will observe that by repositioning the sleeve 19 with its serrated end in various positions relative to the circular baffle 17 and the discharge path thereabout, the stream of fluid passing through the nozzle can be altered from a straight stream to a wide fog pattern.
Means for imparting reciprocal movement to the sleeve 19 is provided so that the nozzle may be desirably adjusted when in use and such means consists of a cam body 23 having a cam channel 24 formed therein as best seen in FIG. 1 and 2 of the drawings. By referring thereto in particular it will be seen that the cam body 23 is centrally apertured as at 25 and rotatably' mounted with respect to the sleeve 19 and the nozzle body 10 by a pivot bolt 26 positioned through the aperture 25 and engaged in a threaded opening in the nozzle body 10. A longitudinally extending slot 27 is formed in the sleeve 19 and the pivot bolt 26 engages the sides of the slot 27 in a slidable manner so as to permit reciprocal motion of the sleeve 19 relative to the pivot bolt 26.
The cam body 23 is substantially enclosed by a cam cap 28 which is fastened thereto circumferentially spaced fasteners 29. By referring now to FIG. 3 of the drawings it will be seen that the cam cap 28 is provided with indicia consisting of the letters S.S. indicating a solid stream location, a widespread V and a conventional V indicating wide and narrow fog pattern locations respectively. It will be observed that these are equally spaced circumferentially of the face of the cam cap 28.
It will thus be seen that rotary motion imparted the cam cap 28 will rotate the cam body 23 in which the cam channel 24 is formed. In order that such motion may be translated to receiprocal motion a detent 30 is positioned in a side wall of the sleeve 19 and extends outwardly and inwardly thereof as best seen in FIG. 1 of the drawings, the outer end having a drilled opening therein in which a spring pressed ball 31 is located. The sides of the detent 30 slidably engage the cam channel 24 and depressions formed in the bottom of the cam channel 24 corresponding with the straight stream narrow fog and wide fog discharge pattern locations are engaged by the spring urged ball 31 when the same is moved thereinto.
It will thus be ssen that when the cam cap 28 is rotated the sleeve 19 will move longitudinally of the nozzle body 10 and thus vary the discharge pattern of the liquid flowing therethrough.
In FIG. 1 of the drawings, the sleeve 19 is shown spaced longitudinally of the circular baffle 17 and the discharge pattern will comprise a straight fluid stream.
By referring to FIG. 3 of the drawings, the exterior of the device will be seen in such position and it will be observed that the letters S.S. are at the lower portion of the dial indicating the straight stream being produced by the nozzle. At the same time the spring urged ball 31 has registered with a depression in the bottom of the cam channel 24 thereby holding the nozzle in the desired setting.
in FIG. 4 of the drawings, the sleeve 19 has been moved to a position close to the circular baffle 17 and a wide fog pattern will be produced. The wide V symbol on the cam cap 28 will so indicate.
Those skilled in the art will observe that by predeterming the most desirable discharge patterns and indexing the same in the cam channel 24 the nozzle of the invention may be easily and quickly set to the desired discharge pattern. It will also be observed that the nozzle as disclosed is a constant gallonage nozzle by reason of the fixed position of the baffle 17 relative to the discharge orifice defined by the annular beveled opening 18 in the upper end of the nozzle body 10 and the fact that the lowermost portion thereof is of lesser area than any other portion of the fluid way through the nozzle body 10.
It will further be seen that the coupling 13 is secured to the nozzle body 10 in the manner of a swivel so that the dial and its indicia may always be positioned in an easy to see and manipulate location relative to the hose or pipe to which the nozzle may be attached.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.
1. A nozzle having a body defining a conduit having an inlet end and an outlet end, a sleeve telescopically positioned about said body having a stream forming portion extending beyond said outlet end, a circular baffle carried by said body and positioned adjacent said outlet end thereof, said body and sleeve including coacting means to cause relative longitudinal movement, said means including a perpendicular pivot on said body extending outwardly through a longitudinally extending slot in said sleeve, a cam body rotably mounted on said perpendicular pivot, a cam channel in said cam body adjacent said sleeve and a detent on said sleeve engaging said cam channel.
2. The nozzle of claim 1 and wherein the cam channel is of irregular configuration so as to move the sleeve in different degrees relative to said rotation of said cam body.
3. The nozzle of claim 1 wherein said channel has depressions therein therealong, and a spring urged ball in said detent registers with said depressions to hold said cam body in predetermined relation to said detent.
4. The nozzle of claim 1 and wherein said outlet end of said body has an annular bevel extending inwardly to an area of smaller diamer.
5. The nozzle of claim 4 and wherein said circular baffle is of larger diameter than said area of smaller diameter in said body.
6. The nozzle of claim 1 and wherein said baffle is carried on a web centrally of said body.
7. The nozzle of claim 1 wherein indicia on said cam body corresponds with predetermined positions of said sleeve relative to said body and the resultant discharge pattern.
8. The nozzle of claim 1 wherein said cam body is circular and an indicia carrying flanged cap is positioned thereover and secured thereto so that rotary motion imparted said cap and body will move said sleeve longitudinally of said body.