U.S. patent number 3,902,671 [Application Number 05/453,096] was granted by the patent office on 1975-09-02 for spray aerator.
Invention is credited to Paul C. Symmons.
United States Patent |
3,902,671 |
Symmons |
September 2, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Spray aerator
Abstract
The invention is an improved combination spray aerator device
for attachment to water taps. It comprises a valving member, a
spray-forming means, and an aerator assembly, with the valving
member being operative to direct water either to the spray-forming
means for discharge as a non-aerated spray or to the aerator
assembly from which it is discharged as an aerated spray.
Inventors: |
Symmons; Paul C. (Duxbury,
MA) |
Family
ID: |
26998981 |
Appl.
No.: |
05/453,096 |
Filed: |
March 20, 1974 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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355744 |
Apr 30, 1973 |
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Current U.S.
Class: |
239/428.5;
239/432; 239/446; 239/407; 239/438; 239/537 |
Current CPC
Class: |
B05B
1/1663 (20130101); B05B 7/0425 (20130101); E03C
1/084 (20130101); B05B 1/18 (20130101) |
Current International
Class: |
B05B
1/14 (20060101); B05B 1/16 (20060101); E03C
1/02 (20060101); E03C 1/084 (20060101); B05B
7/04 (20060101); B05B 1/18 (20060101); B05b
001/16 (); B05b 001/18 (); B05b 007/00 () |
Field of
Search: |
;239/289,407,408,419.5,428.5,432,438,439,441,443-449,453,456,460,541,583,537 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Ward, Jr.; Robert S.
Attorney, Agent or Firm: Schiller & Pandiscio
Parent Case Text
This application is a continuation-in-part of application Ser. No.
355,744 filed Apr. 30, 1973 now abandoned.
Claims
What is claimed is:
1. A liquid aerator and spray device for selectively producing
either an aerated stream of liquid or a needle spray, said device
comprising:
a member having a stem with a longitudinally extending passageway
and at least one laterally directed aperture connected to said
passageway, means for connecting said stem to a liquid supply pipe;
and
an assembly for receiving liquid passing out of said at least one
aperture and selectively discharging said liquid as an aerated
stream or a needle spray, said assembly comprising a liquid valving
member, spray forming means and aerating means;
said valving member being mounted on said stem and having at least
one side opening, said valving member being slidable on said stem
between a first position in which said at least one side opening
communicates with said at least one aperture and a second position
in which said at least one side opening is blocked from receiving
liquid discharged from said at least one aperture;
said spray forming means being mounted for movement with said
valving member relative to said stem and comprising means defining
a plurality of discharge openings that are disposed in a concentric
array around said stem and are in liquid communication with said at
least one side opening in said valving member;
said aerating means being mounted for movement with said valving
member and said spray forming means relative to said stem and
comprising means for mixing air with liquid delivered thereto via
said at least one aperture of said stem;
said valving member comprising means for directing liquid
discharged from said at least one aperture of said stem into said
aerating means when said valving member is in said second
position.
2. A device according to claim 1 wherein said spray forming means
is clamped between a portion of said valving member and a portion
of said aerating means, whereby said valving member, spray forming
means and aerating means are slidable as a unit on said stem.
3. A device according to claim 1 wherein said valving member
comprises a cup-shaped portion and said aerating means comprises a
barrel which is secured to said cup-shaped portion of said valving
member.
4. A device according to claim 3 wherein said spray forming means
is clamped between a portion of said valving member and said
barrel.
5. A device according to claim 3 further including a diffuser disc
attached to the end of said stem and disposed within the cup-shaped
portion of said valving member, said diffuser disc and said
cup-shaped portion coacting with said valving member is in said
second position to define a flow chamber for receiving liquid
flowing out of said passageway via said at least one aperture of
said stem, and further wherein said disc is provided with openings
for conducting liquid from said chamber into said aerating
means.
6. A device according to claim 5 further including means engageable
with said disc and coacting therewith to determine said second
position of said valving member.
7. A device according to claim 5 wherein said valving member
comprises means defining a shoulder that is engageable with said
disc to determine said first position of said valving member.
8. A device according to claim 5 wherein said openings provided in
said disc are smaller than said at least one aperture of said
stem.
9. A device according to claim 5 further including sealing means
between said disc and said cup-shaped portion for preventing
leakage of liquid between said disc and said cup-shaped portion of
said valving member.
10. A device according to claim 9 wherein said sealing means is
attached to said disc at its periphery.
11. A device according to claim 10 wherein said periphery of said
disc is provided with a groove and said sealing means is an O-ring
mounted in said groove.
12. A device according to claim 5 further including fastener means
for securing said disc to said stem, said fastener means extending
through a hole in said disc and being secured in a hole in said
stem.
13. A device according to claim 1 wherein said spray forming means
comprises a spray cap mounted on said valving member, and a spray
body mounted between said spray cap and a portion of said aerating
means, said spray body and said spray cap being clamped between
said aerating means and a portion of said valving member.
14. A device according to claim 13 wherein the exterior of said
spray cap is shaped to form a handle for moving said spray cap so
as to slide said valving member along said stem.
15. A liquid aerator and spray device for selectively producing
either an aerated stream of liquid or a needle spray, said device
comprising:
a member having a stem with a longitudinally extending passageway
and at least one laterally directed aperture connected to said
passageway, means for connecting said stem to a liquid supply
pipe;
a diffuser disc attached to the end of said stem; and
an assembly for receiving liquid passing out of said at least one
aperture and selectively discharging said liquid as an aerated
stream or a needle spray, said assembly comprising a liquid valving
member, spray forming means and aerating means;
said valving member being mounted on said stem and having at least
one side opening and a cup-shaped portion, said valving member
being slidable on said stem between a first position in which said
at least one side opening communicates with said at least one
aperture and a second position in which said at least one side
opening is blocked from receiving liquid discharged from said at
least one aperture;
said spray forming means being mounted for movement with said
valving member relative to said stem and comprising means defining
a plurality of discharge openings that are disposed in a concentric
array around said stem and are in liquid communication with said at
least one side opening in said valving member;
said aerating means being mounted for movement with said valving
member and said spray forming means relative to said stem and
comprising means for mixing air with liquid delivered thereto via
said at least one aperture of said stem;
said valving member comprising means for directing liquid
discharged from said at least one aperture of said stem into said
aerating means when said valving member is in said second position;
and
said disc being disposed so as to coact with said cup-shaped
portion when said valving member is in said second position to
define a flow chamber for receiving liquid flowing out of said
passageway via said at least one aperture of said stem, said disc
having at least one discharge opening for conducting liquid from
said flow chamber into said aerating means, said disc providing an
impedance to discharge of liquid from said flow chamber whereby to
provide a liquid pressure in said flow chamber which opposes
movement of said valving member from said second position to said
first position.
16. A device according to claim 15 further including sealing means
around the periphery of said disc for preventing leakage of liquid
between said disc and said cup-shaped portion.
17. A device according to claim 16 wherein said periphery of said
disc is provided with a groove and said sealing means is an O-ring
seated in said groove.
Description
This invention relates to a combination spray and aerator device
and more particularly to improvements in the construction of swivel
spray aerators for attachment to faucet spouts.
Aerator assemblies which are attached to faucet spouts are well
known in the prior art. Some of the types known are constructed so
that water flowing from a spout is formed into jets of water and
discharged at a high speed into a mixing chamber. The chamber is
constructed so that air is ingested by the local drop in static
pressure. Air and water mix in the chamber and in many cases are
discharged through a screenlike flow straightening and mixing
means. In some forms of aerator spray assembly construction an air
abutment is provided against which jets of water are impinged to
effect minute break up of the water jets prior to mixing with air.
In other forms air is drawn into the mixing chamber through air
passageways that extend from adjacent the outlet of the aerator
assembly in a direction opposite the direction of waterflow before
entering the mixing chamber and then moving downstream as part of
the water air mixture. Examples of prior art aerators are shown and
described in U.S. Pat. Nos. 2,858,120; 2,962,226; 2,989,249;
3,635,405 and 3,684,191 and the references cited therein. Also,
combination spray aerator assemblies are known which are adapted to
be mounted by associated swivel means to a liquid supply pipe, such
as a water tap or faucet spout, and which are operable selectively
to discharge the liquid in aerated condition or as an unaerated
spray. Such devices are exemplified in U.S. Pat. Nos. 3,261,555,
3,286,935, 3,358,934, 3,450,350, 3,520,481, and 3,524,591, and the
references cited therein.
The commercially available combination spray aerators have been
found to have one or more disadvantages such as relatively high
cost, difficulty of disassembly and reassembly for cleaning and
repair, excessive size and unsatisfactory performance in either the
aerating or non-aerating modes of operation, or both.
It is therefore an object of the present invention to provide an
improved combination spray and aerator assembly in which all of the
component parts are designed and constructed to provide convenience
in assembly.
Still another object of the present invention is to provide a spray
aerator device which can easily be disassembled in order to clean
and/or replace parts and is free of other limitations of prior
devices.
Yet another object of the present invention is to provide a device
of the character described which utilizes a conventionally
available aerator assembly and has several improved parts made of
plastic.
A more specific object of the present invention is to provide a
spray aerator device for attachment to a liquid supply pipe which
can be adjusted to produce an aerated stream or an all liquid or
non-aerated needle spray of controlled conical shape, and which can
be swiveled to vary the direction of the water discharge.
The foregoing and other objects are achieved by a spray aerator
device having an annular adapter which is threaded and adapted to
mate with threads formed on a faucet spout. A swivel member
comprising a stem having a central bore or water passageway is
mounted so as to swivel in the adapter. The water passageway of the
stem communicates with at least one radially directed aperture
formed in the stem. An assembly comprising spray-forming means and
a valving or flow-switching member is coaxially mounted on the stem
so as to be axially slidable between two positions. This assembly
comprises a first chamber which is alignable for communication with
the radial aperture or apertures in the stem of the swivel member
and communicates with discharge openings on the spray-forming
means. The flow-switching member also comprises a cup-shaped end
portion. An aerator assembly is connected to the cup-shaped end
portion of the flow-switching member and cooperates therewith to
define a second chamber which also is alignable with the radial
aperture or apertures in the flow-switching member. An annular
diffuser member is attached to the downstream end of the stem of
the swivel member within the second chamber and is provided with
apertures for directing water from the second chamber into the
aerator assembly. The latter aerates water received from the second
chamber and discharges it as a concentrated stream. In operation,
the flow-switching member is slidable between a first and second
position. In the first position, water can flow out of the aperture
in the stem into the first chamber and be discharged from that
chamber via the discharge openings of the spray-forming means,
whereby a non-aerated needle spray is produced. In this first
position the aerator assembly is by-passed. In the second position,
the first chamber is blocked off and water can flow out of the
aperture of the stem into the second chamber. From the second
chamber the water can flow through the diffuser member into the
aerator assembly where it is aerated before being discharged.
Other features and many of the attendant advantages of the
invention are disclosed in or rendered obvious by the following
detailed description which is to be considered together with the
accompanying drawings wherein:
FIG. 1 shows a side elevational view in longitudinal section of one
embodiment of the invention attached to the end of a faucet
spout;
FIG. 2 is a cross-sectional view taken along line 2--2 of FIG.
1;
FIG. 3 is a cross-sectional view taken along line 3--3 of FIG.
1;
FIG. 4 is a partially exploded view of the apparatus of FIG. 1;
and
FIG. 5 is a side elevational view in longitudinal section of a
preferred embodiment of the invention attached to the end of a
faucet spout.
In the drawings, like numerals designate like parts.
Referring now to FIG. 1, an illustrated embodiment of the invention
comprises a flow control device 2 and an aerating unit 4 and is
attached to the discharge end of a faucet spout 10. The spout 10 is
provided with an internal screw thread 14 and an inwardly directed
flange or seat 16 in order to receive a resilient seal washer or
gasket 20 and an annular faucet attaching member or coupling 22.
The latter has a cylindrical portion 24 which is externally
threaded so as to mate with threads 14. Coupling 22 also is
provided with an external flange 26 whose outer edge surface is
knurled to facilitate turning it with a wrench relative to the
spout 10. Coupling 22 may be made of a suitable non-washer
absorbing plastic or a non-corrosive metal such as brass and the
like.
The interior surfaces of washer 20 and coupling 22 are shaped so
that when assembled they form a spherical seal or socket 28 for a
ball 30 formed on the upstream end of a swivel member 32. The
latter has an elongate stem section 34 characterized by an axial
bore 36, an end wall 37, and four equally spaced radial openings or
apertures 38 located adjacent to end wall 37. The outer diameter of
the upstream portion of the stem is made greater than the diameter
of the downstream portion of the stem in order to form a shoulder
40, and an O-ring 42 is provided in a groove formed in the outer
surface of its larger diameter portion. A threaded center hole 44
is formed in end wall 37. Swivel member 32 may be made of a
suitable non-water absorbing plastic or a non-corrosive metal.
The flow control device 2 also includes an annular, axially
slidable valving or flow-switching member 50 formed with an axial
bore 52 and an internal radial flange 54. The member 50 is made of
a non-water absorbing plastic. The internal diameter of flange 54
and the diameter of bore 52 are respectively each slightly larger
than the diameters of the downstream and upstream portions of stem
section 34 so as to enable member 50 to make a snug sliding fit on
stem section 34. On the upstream side of flange 54 the outer
surface of member 50 is cut away at two diametrically opposed
locations so as to form two arcuate slots 56. Slots 56 are deep
enough to intersect the inner surface of member 50 and thereby form
two diametrically opposed side openings 58 that communicate with
bore 52. Slots 56 provide flow dispersion of water discharged
through openings 58. The downstream end of member 50 is formed with
a counterbore 60 so as to form annular shoulder 62. Counterbore 60
is provided with a liner 64. The latter is force fitted in
counterbore 60. Liner 64 may be made of a suitable wear-resistant
plastic or metal material and is preferably made of brass. The
upstream end of liner 64 has an annular flange 66 with a diameter
that is smaller than the internal diameter of shoulder 62 and is
only slightly larger than the outer diameter of the downstream end
of stem section 34. A space is thus provided between flange 54 and
liner 64 for a metal washer 68 and O-ring 70. Washer 68 and the
inner margin of liner flange 66 act as retainers for O-ring 70
which serves to provide a water-tight seal between stem section 34
and member 50.
The exterior of member 50 is provided with an outwardly extending
flange 72 and a circumferential groove located between flange 72
and slots 56 in which is mounted on O-ring 74. The downstream end
of member 50 is externally threaded as shown at 76.
An annular spray cap 78 is mounted on valving member 50. Spray cap
78 is made of the same material as member 50 and is formed with a
spray skirt 80 and an inwardly directed flange 82 at the upstream
end of skirt 80. The latter has a shaped circumferential flange 84
that functions as a gripping portion or handle. The inner diameter
of flange 82 is sized so that it will make a snug fit with the
exterior surface 51 of member 50. Spray cap 78 is mounted on member
50 so that its flat annular upper surface 86 abuts the flat annular
lower surface of flange 72. The axial dimension of flange 82 of the
spray cap is such that the flange does not obstruct the openings 58
in member 50. O-ring 74 provides a seal between flange 82 of the
spray cap and the outer surface 51 of member 50. Spray cap 78
cooperates with member 50 to form a flow chamber 88 that
communicates with openings 58 of member 50.
An annular spray body 90 is mounted between spray cap 78 and member
50. The spray body 90 has a cylindrical inner surface 92 and a
conically tapered outer surface 94. The latter is formed with a
series of axially extending slots 96 spaced uniformly around its
periphery. The base surface 98 of each slot extends substantially
parallel to the axis of the spray body. The inner surface 92 of
spray body 90 is sized so that it will make a relatively tight fit
with the exterior surface 51 of member 50. Spray body 90 is made of
the same material as spray cap 78.
The flow control device 2 also includes a stiff diffuser disc 100
that is provided with a plurality of apertures 102 and a central
opening 104. The disc is secured to the downstream end of stem
section 34 by a retaining screw 110 which is screwed into the
tapped hole 44. Disc 100 is located flush with the end surface of
liner 64 when member 50 is positioned as shown in FIG. 1, and is
sized so that its outer edge slidingly engages the inner surface of
liner 64. Disc 100 preferably is made of any non-corrosive metal,
preferably brass. As shown, the apertures 102 have a diameter which
is smaller than the diameter of apertures 38 and are located on the
disc 100 so that the distance from the center of opening 104 to the
nearest point of any of the apertures 102 is greater than the
radius of the downstream end of stem 34.
The member 50, spray cap 78 and spray body 90 are clamped in
assembled relation, as shown in FIG. 1, by a conventional aerator
assembly 4 that is attached to the lower end of member 50. In the
illustrated embodiment the aerator is like the one shown in U.S.
Pat. No. 3,684,191 but may be made as shown in U.S. Pat. No.
3,635,405. It comprises a barrel 122 which has internal threads 124
adapted to mate with threads 76 of member 50 and an inwardly
extending rim or flange 126 which serves to retain other inner
parts of the assembly. These parts include a jet-forming, cupshaped
member 128 having radial slots 130 which are adapted to form jets
of water as water flows therethrough. A resilient seal washer 132
is provided between member 128 and the end of valving member 50.
The aerator assembly also includes an annular support and air
intake member 134 which has an inturned flange 136 at its
downstream end and laterally extending portions 138 (see FIG. 3)
which engage the inner surface of barrel 122 so as to hold the two
parts in concentric relation and provide air intake passageways
144. A spacing ring 140 having a convex curved inner surface is
mounted between members 128 and 134 in radial spaced relation with
slots 130. A plurality of screens 142 are disposed within intake
member 134 and retained by its flange 136. Screens 142 act as
diffusing members and also to catch any dirt particles entrained in
the water.
When water is discharged, the valving member may be slidably moved
between a first position wherein a non-aerated water spray is
discharged and a second position wherein a coherent jet of aerated
water is discharged. The first position is achieved by sliding
member 50 downwardly on stem 34 to the extent permitted by
engagement of disc 100 with the internal flange of liner 64. Disc
100 thus acts as a stop for member 50. In this position the
apertures 38 of stem 34 are aligned with the openings 58 of member
50, with the result that water can flow into chamber 88 and leave
that chamber via the openings defined by the slots 96 of spray body
90 and the surrounding inner surface of spray cap 78. The arcuate
slots 56 provide flow direction control into chamber 88 and the
discharge passageways formed by slots 96 act to form a cylindrical
needle-like spray. In this position O-ring 70 prevents water from
leaking into the aerator assembly. The second position of member 50
is shown in FIG. 1 and is achieved by slidably moving member 50
upwardly on stem 34 until disc 100 is engaged by rubber washer 132.
In this position the openings 58 in member 50 are blocked off by
stem 34 and water can flow from the apertures 38 of stem 34 into a
chamber 101 formed between the stem and liner 64. The member 50
tends to remain in this second position because of water pressure
acting on flange 66 of liner 64. The water leaves chamber 101
through apertures 102 of diffuser disc 100, into the jet-forming,
cup-shaped member 128. The water then flows as jets through slots
130 and these jets impinge against the curved inner surface of ring
140 to effect a minute break up of the water streams. The
incoherent water then enters the mixing chamber 146 found between
air intake member 134 and member 128 where it is mixed intimately
with air drawn in through passageways 144 before passing through
screens 142 to issue as a coherent aerated stream.
FIG. 5 illustrates the preferred embodiment of the invention which
is identical to and operates in the same manner as the embodiment
illustrated in FIG. 1, except that disc 100 is replaced by an
improved stiff diffuser disc 150. Disc 150 is provided with a
plurality of apertures 152 and a central opening 154. Like disc
100, the apertures 152 of disc 150 have a diameter which is smaller
than the diameter of apertures 38. Disc 150 is mounted on the
downstream end of stem 34 and held in place by retaining screw 110
which is screwed into the tapped hole 44. It is noted that the
downstream end of stem 34 is preferably reduced in diameter to the
approximate diameter of opening 154 so as to provide a shoulder 156
for engagement by disc 150. The lower surface of disc 150 is flush
with the end surface of liner 64 when member 50 is in its upper
position as shown in FIG. 5, and is sized so that its outer edge
slidingly engages the inner surface of liner 64. In order to insure
that water will not leak between the outer edge of the disc 150 and
the inner surface of liner 64, an annular groove is provided around
the periphery of disc 150 for receiving a sealing member in the
form of O-ring 158. The disc 150 can be made of the same material
as disc 100 and thus is preferably made of any non-corrosive metal,
such as brass or the like. The use of O-ring 158 to prevent water
leakage between the outer edge of disc 150 and liner 64 is
advantageous to avoid a decrease in water pressure in chamber 101
when flow-switching member 50 is in its UP position as shown,
thereby assuring that enough water back pressure is present to
prevent member 50 from moving down under its own weight far enough
to switch flow into chamber 88. Provision of O-ring 158 permits
looser tolerances with respect to the inner diameter of liner 64
and the outer diameter of disc 150 than is the case with the
corresponding parts of the embodiment of FIG. 1.
The invention herein described and illustrated has a number of
advantages, notably ease of assembly and disassembly, use of a
conventional aerator assembly, and positive valving to alternately
effect production of an aerated stream or a non-aerated needle type
spray with the spray pattern being generally cylindrical. It also
permits the use of plastic materials for most of its parts. Various
plastics will satisfy the requirements of the invention, such as
Delrin, polypropylene, Teflon. Forming the spray cup and body
separate from the valving member facilitates forming and shaping
the apertures 58 and slots 56 and 96. Other conventional aerator
assemblies also may be used in place of aerator unit 4. Still other
advantages will be obvious to persons skilled in the art.
Since certain other obvious changes may be made in the illustrated
embodiment of the device without departing from the scope of the
invention, it is intended that all matter contained herein be
interpreted as illustrative and not in a limiting sense.
* * * * *