U.S. patent number 3,785,560 [Application Number 05/306,528] was granted by the patent office on 1974-01-15 for nozzle for discharging liquids containing solid matter.
This patent grant is currently assigned to Rain Jet Corp.. Invention is credited to John O. Hruby, Jr..
United States Patent |
3,785,560 |
Hruby, Jr. |
January 15, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
NOZZLE FOR DISCHARGING LIQUIDS CONTAINING SOLID MATTER
Abstract
A water discharge nozzle has particular utility as a fountain
nozzle in situations where the water supply to the nozzle has solid
matter entrained therein. The nozzle includes an elongate tubular
body which has outlet and inlet openings across opposite ends
thereof. Annular plug means are disposed in the body adjacent the
outlet opening and are engaged about their circumference in
intimate engagement with the inner walls of the body. The plug
means define a single passage therethrough, the passage being
composed of a substantially circular hole which extends from the
apex of substantially conical recess in that end of the plug which
is located adjacent the inlet opening. The recess is concave to the
inlet opening. A plurality of flutes are formed in the walls of the
hole and extend with the hole from the recess to the end of the
plug means located adjacent the outlet opening. Each flute has
opposing wall surfaces disposed in non-diverging relation
proceeding radially away from the hole axis.
Inventors: |
Hruby, Jr.; John O. (Burbank,
CA) |
Assignee: |
Rain Jet Corp. (Burbank,
CA)
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Family
ID: |
26777492 |
Appl.
No.: |
05/306,528 |
Filed: |
November 15, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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87886 |
Nov 9, 1970 |
3705686 |
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242663 |
Apr 10, 1972 |
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304244 |
Nov 6, 1972 |
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Current U.S.
Class: |
239/17; 239/601;
239/590.5 |
Current CPC
Class: |
F21S
8/00 (20130101); B05B 17/08 (20130101); F21W
2121/02 (20130101); F21W 2131/401 (20130101) |
Current International
Class: |
B05B
17/08 (20060101); B05B 17/00 (20060101); F21S
8/00 (20060101); B05b 017/08 () |
Field of
Search: |
;239/6,17,22,552,558,590.5,601,596,460,469 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wood, Jr.; M. Henson
Assistant Examiner: Love; John J.
Attorney, Agent or Firm: Robert L. Parker et al.
Parent Case Text
REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application
Ser. No. 87,886 filed Nov. 9, 1970 now U.S. Pat. No. 3,705,686, of
copending application Ser. No. 242,663 filed Apr. 10, 1972, and of
copending application Ser. No. 304,244 filed Nov. 6, 1972.
Claims
What is claimed is:
1. A water discharge nozzle comprising an elongate tubular body
having an outlet opening across one end thereof and an inlet
opening across the other end thereof, annular plug means disposed
in the body adjacent the outlet opening in spaced relation to the
inlet opening and engaged about its circumference in intimate
engagement with the inner walls of the body, the plug means
defining a single passage therethrough, the passage being composed
of a substantially circular hole which extends from the apex of a
substantially conical recess in the end of the plug means adjacent
the inlet opening, the recess being concave to the inlet opening,
and a plurality of flutes in the walls of the hole and extending
with the hole from the recess to the end of the plug means adjacent
the outlet opening, each flute having opposing wall surfaces
disposed in non-diverging relation proceeding radially away from
the hole axis, the nozzle being devoid of any structure in the
passage and being devoid of any structure located adjacent the end
of the plug means proximate to the body outlet opening sufficiently
to be engaged by water emerging from the passage during operation
of the nozzle.
2. A nozzle according to claim 1 wherein the recess and the hole
are coaxially aligned with the body.
3. A nozzle according to claim 1 wherein the plug means is disposed
wholly within the body.
4. A nozzle according to claim 1 wherein the flutes have respective
axes disposed parallel to the hole axis.
5. A nozzle according to claim 1 wherein the flutes have respective
axes which diverge from the hole axis proceeding away from the
recess.
6. A nozzle according to claim 1 wherein the flutes have respective
axes which converge toward the hole axis proceeding away from the
recess.
7. A nozzle according to claim 1 wherein the flutes have respective
axes each of which is disposed in a respective plane radially of
the hole and in which the hole axis is also disposed.
8. A nozzle according to claim 1 wherein adjacent flutes around the
circumference of the hole are contiguous at said circumference.
9. A nozzle according to claim 1 wherein each flute extends
radially away from the hole for a distance which is at least equal
to the average width of the flute between said opposing wall
surfaces thereof.
10. A nozzle according to claim 9 wherein the average depth of each
flute radially of the hole is at least substantially equal to the
radius of the hole.
11. A nozzle according to claim 1 wherein the opposing wall
surfaces of each flute are substantially parallel.
12. A nozzle according to claim 1 wherein the recess at the end of
the plug means adjacent the inlet opening has a diameter
substantially equal to the inner diameter of the body.
13. A nozzle according to claim 1 wherein the half-angle of the
recess is in the range of from about 30.degree. to about
45.degree..
14. A water discharge nozzle comprising an elongate tubular body
having an outlet opening across one end thereof and an inlet
opening across the other end thereof, annular plug means disposed
in the body adjacent the outlet opening in spaced relation to the
inlet opening and engaged about its circumference in intimate
engagement with the inner walls of the body, the plug means
defining a single passage therethrough, the passage being composed
of a substantially circular hole which extends from the apex of a
substantially conical recess in the end of the plug means adjacent
the inlet opening, the recess being concave to the inlet opening, a
plurality of flutes in the walls of the hole and extending with the
hole from the recess to the end of the plug means adjacent the
outlet opening, each flute having opposing wall surfaces disposed
in non-diverging relation proceeding radially away from the hole
axis, a tubular member having an inner diameter substantially
greater than the outer diameter of the body disposed concentrically
about the body, annular closure members engaged at opposite ends of
the tubular member between the tubular member and the exterior of
the body to define an annular chamber within the tubular member
about the body, water outlet passage means formed through the
closure member located adjacent the body outlet opening and
arranged to discharge water from the chamber in a desired manner,
and flow aperture means through the body to the chamber between the
plug means and the body inlet opening.
15. A nozzle according to claim 14 wherein the passage means are
arranged to discharge water from the chamber in a plurality of
diverging water streams spaced uniformly circumferentially of the
body.
16. A water discharge nozzle comprising an elongate tubular body
having an outlet opening across one end thereof and an inlet
opening across the other end thereof, annular plug means disposed
in the body adjacent the outlet opening in spaced relation to the
inlet opening and engaged about its circumference in intimate
engagement with the inner walls of the body, the plug means
defining a single passage therethrough, the passage being composed
of a substantially circular hole which extends from the apex of a
substantially conical recess in the end of the plug means adjacent
the inlet opening, the recess being concave to the inlet opening, a
plurality of flutes in the walls of the hole and extending with the
hole from the recess to the end of the plug means adjacent the
outlet opening, each flute having opposing wall surfaces disposed
in non-diverging relation proceeding radially away from the hole
axis, a support base defining an internal chamber having coaxially
aligned inlet openings thereto through side walls of the chamber,
an outlet opening from an upper portion of the chamber, and means
associated with the chamber outlet opening for mounting the nozzle
to the base with the nozzle inlet opening in communication with the
base chamber.
17. Apparatus according to claim 16 including flow controlling
means in the chamber for causing water flowing along a path from
the chamber inlet openings to the nozzle inlet opening to have a
uniform liquid flow pattern at the nozzle inlet opening.
18. Apparatus according to claim 17 wherein the flow controlling
means comprises a pair of perpendicular plates intersecting each
other coaxially of the nozzle body and disposed in the chamber, one
of the plates being aligned with the axes of the chamber inlet
openings.
19. Apparatus according to claim 16 including means connected to
the base and adapted for buoyantly supporting the base in a body of
water.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to water discharge nozzles, and more
particularly to nozzles adapted for discharging water having solid
matter entrained therein, which nozzles are especially useful in
fountains installed in lakes and ponds, for example.
2. Description of the Prior Art
Commonly-owned U.S. Pat. Nos. 3,330,486, 3,447,749, 3,558,053,
3,602,434, 3,612,396, 3,630,443, 3,640,472 and 3,645,449, for
example, describe water discharge nozzles which are useful in
generating the aesthetically appealing water discharge patterns
found in ornamental fountains. These nozzles produce desired
fountain discharge patterns by flow of water through passages and
apertures defined in the nozzle structure. The aesthetic properties
of the particular discharge pattern are determined by the shape,
size and disposition of the passages and apertures in the
respective nozzle structure. The presence of solid matter in water
supplied to these nozzles may result in plugging or clogging, in
whole or in part, of some or all of the passages and apertures in
the particular nozzle, thereby having an unpleasing adverse effect
upon the nozzle discharge pattern.
The nozzles described in the above-mentioned patents may be used to
advantage without significant adverse effect in conventional
fountains where the water supplied to the fountain nozzle is
purified water of much the same character as is obtained from
municipal drinking water lines and the like. In fact, it is
conventional to operate fountains, whether including structures
according to the foregoing patents or not, on such purified water.
Such purified water does not contain sufficient solid matter to
have an adverse effect upon these nozzle structures.
It is becoming more and more common to install fountains in lakes,
ponds or the like for purely ornamental effects or for both
ornamental and other utilitarian effects, such as aeration of the
discharged water. Fountains located in these lakes may be of either
the floating or non-floating variety. In many cases, the water
supplied to the fountain nozzle is drawn from the lake itself and
may contain substantial solid matter such as leaves, small fish,
moss, twigs and the like. The nozzle structures defined in the
patents listed above may be used in lake fountains and the like if
the fountain assembly includes suitable strainers or filters to
remove any entrained solid matter from the water stream before the
water reaches those orifices and passages in the nozzle structure
which define the fountain discharge pattern. The use of a strainer
or filter, however, requires that the fountain be serviced at
intervals determined by the nature and extent to which large size
solid matter is present in the water supplied to the fountain
assembly. In some cases, the raw water supplied to the fountain
assembly includes sufficient solid matter that the types of
strainers required for successful operation of previously known
fountain nozzles may require service on a daily basis. The need to
service and clean filters and the like is an economic burden
associated with the operation of a fountain and should be minimized
wherever possible. Also, the presence of a strainer or filter in a
fountain assembly is an added element of cost in the fountain
installation.
A need exists, therefore, for fountain nozzle structures which can
operate successfully to produce the desired ornamental fountain
discharge patterns even where the water supplied to the nozzle
structure contains substantial entrained solid matter. The
existence of such nozzle structures makes possible the use of
strainerless fountain assemblies which may be used to advantage in
lakes, ponds or the like where the fountain operating water is raw
water drawn from the lake itself.
SUMMARY OF THE INVENTION
This invention provides novel, efficient, economical and effective
nozzle structures for discharging water having solid matter
entrained therein. The present nozzle structures are arranged so
that any entrained solid matter presented to the nozzle is passed
through the nozzle and is not retained by the nozzle to clog the
water flow passages or apertures therein. Such a nozzle has
particular utility in a fountain assembly disposed in a lake for
use with water drawn from the lake itself and supplied directly to
the nozzle structure without first passing through a strainer or
the like. Such nozzles have other areas of utility such as in
sewage treatment plants where they may be used for preliminary
aeration of raw sewage, for example.
Generally speaking, this invention provides a water discharge
nozzle which includes an elongate tubular body having an outlet
opening across one end thereof and an inlet opening across the
other end thereof. Annular plug means are disposed in the body
adjacent the outlet opening in spaced relation to the inlet opening
and are engaged about their circumference in intimate engagement
with the inner walls of the body. The plug means define a single
passage therethrough. The passage is composed of a substantially
circular hole which extends from the apex of a substantially
conical recess in the end of the plug means adjacent the inlet
opening. The recess is concave to the inlet opening. A plurality of
flutes are formed in the walls of the hole and extend with the hole
from the recess to the end of the plug means disposed adjacent the
outlet opening. Each flute has opposing wall surfaces disposed in
non-diverging relation proceeding radially away from the hole
axis.
DESCRIPTION OF THE DRAWINGS
The above-mentioned and other features of this invention are more
fully set forth in the following detailed description of presently
preferred embodiments of this invention, which description is
presented with reference to the accompanying drawings, wherein:
FIG. 1 is an elevation view, partially in cross-section, of a
nozzle according to this invention;
FIG. 2 is a plan view taken along line 2--2 in FIG. 1;
FIG. 3 is a fragmentary cross-sectional elevation view of another
water discharge nozzle;
FIG. 4 is a fragmentary elevation view of still another water
discharge nozzle;
FIG. 5 is a cross-sectional elevation view of a fountain assembly
in which the nozzles shown in FIGS. 1, 2 and 3 may be used to
advantage;
FIG. 6 is a fragmentary view taken along line 6--6 in FIG. 5;
and
FIG. 7 is a cross-sectional view taken along line 7--7 in FIG.
5.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
A water discharge nozzle 10 (see FIG. 1) includes an elongate,
straight, tubular body 11 having open lower and upper ends 12 and
13, respectively. The open ends of the body define water inlet and
water outlet openings to and from a duct 14 which extends through
the length of the body. Preferably, body 11 is fabricated of a
suitable length of polyvinyl chloride pipe of desired diameter. The
body is adapted adjacent its lower end, as by external threads 15,
to be secured to a suitable source of water to be discharged. As
shown in FIG. 5, the water source for the nozzle may be a fountain
base.
An elongate annular plug 16 is disposed within body 11 adjacent the
outlet opening from the body. As shown in FIG. 1, in nozzle 10 plug
16 is disposed wholly within the length of the body, but it is
within the scope of this invention that some portion of the plug
may be disposed outwardly of the body upper end, if desired. The
plug has substantial length in the body relative to the mean
transverse dimension of duct 14 and is at least as long between its
opposite ends 17 and 18 as the inner diameter of the body;
preferably plug 16 has a length which is greater than its outer
diameter. The plug preferably is force fitted into the interior of
body 11 so that the outer walls 19 of the plug are intimately
engaged with the walls of duct 14 along the length of the plug. In
this manner, the plug is effectively sealed to the body so that no
water flow exists between the body and the plug.
A single water flow passage 20 is defined through the plug
coaxially of body 11. The passage is composed of a circular hole 21
(see FIG. 2 where the hole is represented in broken lines) which
extends upwardly through the plug from the apex of a conical recess
22 formed in the plug bottom surface 17. A plurality of flutes 23
are formed in the walls of hole 21 and extend with the hole from
the recess to the upper end of the plug. Each recess has opposing
wall surfaces 24 which are disposed in non-diverging relationship
proceeding radially away from the axis of passage 20. Each flute
has a depth radially of the plug which is at least as great as the
width of the flute between wall surfaces 24. Preferably, the depth
of each flute is at least equal to the radius of hole 21.
Preferably, as shown in FIG. 2, wall surfaces 24 are disposed
parallel to each other, but it is within the scope of this
invention that these wall surfaces may converge toward each other
proceeding toward the circumference of the plug. Also, each flute
has an end surface 25 which preferably is semicircularly contoured
concave to the axis of the passage. In a preferred nozzle 10,
flutes 23 are defined in a plug of polyvinyl chloride using a ball
end mill to define the flutes in the walls of a previously drilled
circular hole through the plug.
Each flute has an axis 26 which is illustrated in broken lines in
FIG. 1, at the center of curvature of flute end surface 25. In
nozzle 10, flute axes 26 converge toward each other proceeding
upwardly along passage 20 from recess 22. This relationship between
the flute axes and the passage axis is referred to as a positive
taper angle, and preferably the taper angle 27 of flutes 23 is in
the range of from 2 to 5 degrees.
As best shown in FIG. 2, flutes 23 are spaced uniformly about the
circumference of hole 21. Preferably the flutes are so formed in
the walls of the hole such that adjacent wall surfaces 24 of
adjacent grooves intersect each other at the hole and are not
spaced from each other about the circumference of the hole. That
is, adjacent grooves 23 are contiguous to each other at the
circumference of hole 21.
It is preferred that the half-angle, (one-half the included angle
at the apex of conical recess 22) of the conical recess be in the
range of from about 30 degrees to about 45.degree., and for best
practice of the invention, the value of this half-angle is toward
the lower end of this range.
Nozzle 10 is particularly well suited for use in a fountain located
in a lake or the like, and in which the water supplied to the
nozzle contains entrained solid matter such as leaves, small fish
or the like, as is the case where the water supplied to the
fountain is taken from the lake itself. Any solid matter of
sufficiently small size that it can be captured in the water stream
supplied to the nozzle is passed through the nozzle structure
itself and is not caught or retained by the nozzle. Inasmuch as the
diameter of conical recess 22 at the lower end of plug 16 is
essentially equal to the diameter of the plug, solid matter is not
entrained by a shoulder formed in the lower end of the plug. Also,
the conical recess directs water approaching the lower end of the
plug to flow substantially along the axis of duct 14 so that
entrained solid matter is contained within that portion of the
discharge stream which flows along hole 21. Flutes 23 are provided
to impart the desired definition to the discharge stream from
nozzle 10.
FIG. 3 shows another nozzle 30 which is similar to nozzle 10 except
that plug 31 of nozzle 30 defines a single liquid flow passage
through the plug in which flutes 32 have axes 33 disposed parallel
to the axis of duct 14. In nozzle 35 (see FIG. 4), a single liquid
flow passage through plug 36 is defined so that flutes 37 have axes
38 inclined to the axis of duct 14 to diverge from each other
proceeding toward the upper end surface of the plug. Te angle of
divergence 39 of flute axes 38 preferably is in the range of from
2.degree. to 5.degree.. In the case of nozzle 35, flutes 37 have a
negative taper in that the cross-sectional area of the passage
above recess 32 increases proceeding in the direction of water flow
through the nozzle. Nozzles 10, 30 and 35 all have different water
discharge characteristics and can be used to advantage to define
fountain discharge patterns of different aesthetic characteristics.
Within either of nozzles 10 or 35, it has been found that a
variation of the taper angles, 27 and 39 respectively, also has an
effect upon the aesthetic characteristics of the discharge
pattern.
As mentioned above, nozzles 10, 30 and 35 may be used to advantage
in floating fountain assemblies located in the lake of a park or a
golf course, for example. This is illustrated in FIG. 5, which
depicts a floating fountain assembly 40 which, in effect, includes
nozzle 30 as a component thereof by virtue of the use of plug 31 as
an element of a discharge nozzle 42 which is mounted to a support
base 41. The support base and nozzle assembly are coaxially aligned
along an axis 43 of the fountain assembly. It will be understood
that, if desired, plug 16 or plug 36 could be included as
components of nozzle assembly 42, depending upon the particular
water discharge characteristics desired in the fountain.
Nozzle base 41 is composed of a body 44 and a cover plate 45 which
cooperate to enclose a chamber 46 formed coaxially of the fountain
assembly. The chamber is of substantially right circular
configuration and has diametrically opposed inlet openings formed
through the side walls of the body adjacent the floor of the
cavity. The inlet openings are defined by corresponding ones of a
pair of connection nipples 48 engaged through the body side walls.
Suitable water supply conduits are connected to the outer ends of
the connection nipples as more fully explained in copending U.S.
Pat. No. 3,705,686. A plurality of light and float support arms 49
have their inner ends engaged within corresponding recesses 50
formed in the exterior of the body side walls at regularly spaced
intervals around the circumference of the body. The inner ends of
the light and float support arms are maintained within recesses 50,
and connection nipples 48 are retained within the body, by being
diametrically traversed by corresponding ones of a plurality of
through-bolts 51 which extend vertically through the body side
walls and the rim of cover plate 45, as shown in FIG. 5. Suitable
floats (not shown, but see copending application Ser. No. 304,244
filed Nov. 6, 1972) may be connected to the remote ends of arms 49
for buoyantly supporting the fountain assembly in a vertical
attitude in a lake or the like with the upper extent of the nozzle
assembly located above the water surface.
Nozzle assembly 42 includes a central elongate tubular body 53
which is substantially identical to body 11 of nozzle 10, for
example, except for the presence in body 53 of a plurality of holes
54 formed through the body intermediate its length. Body 53 is
connected, as by threading or solvent welding, to the boundaries of
a chamber outlet opening 55 formed coaxially of the chamber through
cover plate 45. Plug 31 is disposed, as described above, in the
upper end of body 53. An outer tubular member 56 is disposed
concentrically about body 53 and is mounted to body 53 by upper and
lower annular closure members 57 and 58 respectively. Upper closure
member 57 is disposed partially out of the upper end of tubular
member 56. In this manner, an annular chamber 59 is formed about
the circumference of body 53 and is communicated to the interior of
body 53 by holes 54. A plurality of water discharge passages are
formed through upper closure member 57 in such manner as to
discharge water from chamber 59 in a desired manner. In nozzle
assembly 42, the discharge passages are formed by corresponding
ones of a plurality of grooves 60 formed in the circumference of
upper closure member 57 at regularly spaced intervals about axis
43. Grooves 60 have opposing parallel wall surfaces 61 (see FIG. 6)
and are tapered so that the cross-sectional area of the grooves
increases proceeding upwardly along axis 43 in the nozzle
assembly.
In operation, fountain assembly 40 produces a discharge pattern
which is composed of a central axial stream of aerated water
discharged through plug 31, and by a plurality of upwardly
diverging discrete unaerated water streams discharged through
corresponding grooves 60. In the fountain assembly, holes 54
perform both as a strainer for particulate matter contained in the
water introduced to the fountain assembly and as flow regulators
for predetermining the quantity of water discharged through grooves
60 relative to the quantity of water discharged through plug 31.
Preferably the aggregate cross-sectional area of holes 54 is
defined so that the major volume of the water introduced to chamber
46 is discharged from the nozzle assembly through plug 31. In this
manner, the principal water stream through the nozzle assembly is
axially through body tube 53 so that any solid matter contained
within the water introduced to chamber 46 is induced to flow
through plug 31 rather than through strainer and flow regulating
holes 54 into chamber 59.
As set forth more fully in copending U.S. Pat. No. 3,705,686, it is
desired that the water which enters the lower end of nozzle
assembly 42 from base chamber 46 have a uniform liquid flow pattern
at the water inlet opening to the nozzle assembly, and also that
the flow characteristic (either turbulent or laminar) of the water
entering the nozzle assembly be known. These characteristics of the
water entering the lower end of body tube 53 at the inlet opening
to nozzle assembly 42 are assured by the incorporation of a flow
controlling and equalizing baffle assembly 65 which is carried by
and depends from the lower end of body tube 53 into chamber 46. The
baffle assembly is comprised of a pair of plates 66 and 67 (see
FIG. 7) which are disposed perpendicular to each other. Each plate
has a neck portion 68 which has a width corresponding to the inner
diameter of body tube 53 and which is disposed within the lower
terminal portion of the body tube, as shown in FIG. 5. Each plate
also includes a lower blade portion which is of greater width than
the neck portion, but which is smaller in transverse extent than
the diameter of chamber 46. The baffle assembly is configured so
that its lower extent is spaced above chamber floor 47 in the fully
assembled fountain assembly. Also, the baffle assembly is disposed
so that the plane of one of the baffle plates, baffle plate 67 for
example, is aligned with the axes of coaxially aligned connection
nipples 48. Thus, one-half of the water volume entering chamber 46
through each connection nipple 48 is directed to the nozzle
assembly via a corresponding quadrant of the baffle assembly. This
disposition of the baffle assembly relative to the chamber inlet
opening assures that the water flow path through each quadrant of
the baffle assembly is essentially identical to the water flow path
associated with each other quadrant, thereby to assure that water
actually entering the lower end of the nozzle assembly has the
desired flow characteristic and uniform liquid flow pattern.
Nozzles 10, 30 and 35 have been found to be exceptionally efficient
water discharge devices. One nominal 4 inch nozzle, having the
features of nozzle 10, includes a plug 5 inches long and 3 3/4
inches in diameter to fit within a nominal 4 inch diameter
polyvinyl chloride pipe. The single water flow passage through this
plug is composed of a circular hole 1 inch in diameter and six
contiguous flutes approximately three-fourth inch deep (at the
upper end of the plug) by one-half inch wide. The flutes in this
nozzle have about 3.degree. positive taper angle, and the
half-angle of the conical recess at the bottom of the plug is about
35.degree.. When connected to a 4 inch diameter water supply duct,
this nozzle discharges a water stream 9 feet high at the rate of
300 gallons per minute when the water pressure at the nozzle inlet
opening is 7 psig. This nozzle discharges a water stream 48 feet
high at the rate of 700 gpm when supply water through a 6 inch duct
is 25 psig adjacent the nozzle. The same nozzle discharges 400 gpm
at 12 psig in a 22 foot high water stream when the nozzle is
disposed at an angle of 25.degree. relative to a vertical reference
line. When 450 gallons per minute of water is supplied at 32 psig
to the inclined nozzle through a 6 inch water supply line, the
discharge stream reaches a height of 45 feet and falls back to
earth (at the level of the nozzle inlet opening) 100 feet away from
the nozzle. A nozzle with these discharge characteristics can be
used to advantage as a firefighting nozzle, for example. Therefore,
it is apparent that nozzles according to this invention have
utility in many areas apart from fountains in which the fountain
water contains substantial entrained solid matter.
Workers skilled in the art to which this invention pertains will
readily appreciate that modifications and alterations of the
specific structures described above may be made while still
utilizing the basic teachings of this invention. The preceding
description has been presented with reference to presently
preferred embodiments of the invention, which embodiments are
illustrative of the principles and properties of nozzles according
to the invention. Accordingly, the foregoing description should not
be considered as limiting the scope of the invention.
* * * * *