close

Вход

Забыли?

вход по аккаунту

?

код для вставки
June 8, 1948.
w. B. ANDERSON ETAL
2,442,746
FLOW CONTROL APPARATUS
Filed April 13, 1944
I I
W
I
i£07
n0
a2
nm
ElI
W/ZQ
O., V 8
e .
I
I
z
5I
I
./T l.
MnI 4
H.
BI
mmwa2
NW0
N6
WlTN ESSES:
WW
,3
W
6
B my
Y.
‘.0
YS,”
.
‘a
v
M
mam‘
m?E
,,d
2,442,746
Patented June 8, 1948
UNlED STATES PATENT OFFICE
2,442,746
FLOW CONTROL APPARATUS
William B. Anderson, Detroit, Mich., and Harold
D. Shaw, Longmeadow, Mass., assignors to
Westinghouse Electric Corporation, East Pitts
burgh, Pa., a corporation of Pennsylvania
Application April 13, 1944, Serial No. 530,792
4 Claims. (Cl. 251-5)
2
1
This invention relates to ?ow control devices
of the type in which the flow of a ?uid medium
may be variably controlled or entirely shut o?
at the will of the operator.
An object of the invention is to provide a ?ow
control device capable of in?nite adjustment be
tween fully open and fully closed position by
the slight turning of an adjustable member.
A further object is to provide variable ?ow
outer end is bored through or otherwise aper
tured, as indicated at I8. Preferably the outer
end of bore I8 is swaged or otherwise formed
to provide a reduced ori?ce IS. The provision of
the reduced ori?ce is determined by the nature
of the medium whose flow is to be controlled.
In the particular application of the device here
in described, that is, in the control of an in
secticidal aerosol using dichlorodi?uoromethane
control by the variation in compression on a 10 as the propelling medium, it has been found that
an orifice diameter between 0.025 and 0.030 inch
resilient apertured body.
gives the best results when the channel 22 in
Still another object is to provide a resilient
resilient plug 2|, described below, is 0.048 inch.
flow control device so constructed and arranged
The body member 16 may be provided with an
as to produce a minimum amount of wear on
15 enlarged portion 20 to serve as a ?nger grip.
its operating parts.
The flow-controlling member proper comprises
A more speci?c object is to provide a cheap,
a resilient plug 2| provided with a longitudinal
practical and readily assembled resilient ?ow con
channel 22. The plug ?ts tightly against the
trol device.
walls of the recess l1, and if made of natural
These and other objects are e?ected by the
invention as will be apparent from the following 20 rubber, synthetic rubber or equivalent materials,
may be vulcanized to these walls or otherwise
description and claims taken in connection with
cured after being inserted, or it may be molded
the accompanying drawings, forming a part of
and cured before it is inserted into the body
this application, in which:
I 6. Obviously the nature of this material will
Fig. 1 is an elevation showing the improved
be determined by the composition of the ?uid me
?ow control device applied to a pressure vessel,
dium passing through the channel, the main re
the latter being shown in section;
quirement being that it has a resiliency and re
- Fig. 2 is a section on the line 11-11 of Fig. 1,
covery after distortion approaching that of nat
on an enlarged scale, and showing the ?ow con
ural rubber. Preferably a portion of the resili
trol device in fully open position; and
‘Fig. 3 is a view similar to Fig. 2 but showing 30 ent member engages some of the threads H to
the ?ow control device in fully closed position.
provide additional gripping and sealing surface
between the resilient member and the body mem
ber IS.
The lower or inner end of the resilient mem
by the nature of the medium con?ned therein and
from which the ?ow of the medium is controlled 35 ber is provided with a reduced rounded end or
shoulder 23 having a somewhat enlarged recess
by our improved flow control device II. The ves
24 into which is molded a hollow ferrule 25, pref
sel as shown is illustrative only and merely indi
erably made of metal or other rigid material.
cates a source of ?uid under pressure. A nip
This ferrule, together with the rounded shoul
ple I2 is brazed or otherwise secured to the ves
sel ID. The outer end of the nipple is screw 40 der 23, provides a minimum effective contact sur
face with the top of nipple l2 when the control
threaded, as shown at 13, and the inner end of
device is moved to closed position (Fig. 3), thus to
the control device is threaded, as at It, for ad
a large extent eliminating the abrasive e?ect of
justable engagement with the threads 13. Should
the torsional twist which would be the case if this
the vessel Ill be intended to dispense a liquid un
der pressure, a tube I5 extending to the bottom 45 surface were otherwise ?at. At the same time,
this shoulder 23 maintains continuous sealing en
of the vessel l0 may be brazed or otherwise se
In the drawings, l0 represents a pressure vessel
whose construction and materials are determined
cured to the nipple and in ?uidtight engagement
therewith. The tube I5 is necessary only if it is
desired to dispense a liquid with the container in
a. substantially vertical position.
gagement with the upper end of the nipple l2
even when the passage 22 is in full open position
(Fig. 2) so that leakage of ?uid under pressure
Otherwise a 60 past the threads l3, I4 is prevented at all times.
The recess 24 is provided to take care of any por
liquid may be dispensed by properly tilting the
tion of tube I5 which may project beyond the end
vessel.
of the nipple.
The ?ow control device proper comprises a
The operation of the device is apparent from
body member it having a recess H at its inner
end in which the threads N are provided. The 55 the foregoing description and the drawings.
2,442,746
.
3
4
>
Fig. 3 shows a somewhat schematic view of the
rotatable body member, and a deformable resili
ent member in and rotatable with the body
member, said deformable member having a chan
nel therethrough for the passage of ?uid and
device in the closed position, with the body mem
ber screwed down on the nipple until the resilient
member 2| has been compressed and distorted to
cut oif the flow through channel 22. From this
being adapted when deformed by engagement
position, the resilient member may be released
with a ?xed member to regulate the ?ow of ?uid
to control the enlargement of the channel 22 to
through said channel between fully opened and
any desired degree up to the full-open position
fully closed positions, said deformable member
of Fig. 2 and thereby to control the rate of ?ow
having a reduced shoulder portion at its inner
10 end for engaging said ?xed member to deform
of the ?uid medium.
The foregoing device provides a simple, eco
the deformable member as the body member is
nomical and practical device for controlling the
rotated toward the closing position, said shoul
?ow of ?uids under pressure. It'has been used
der portion being so constructed and arranged
with particular effectiveness to control the ?ow
as to continuously maintain sealing engagement
of liquid dichlorodi?uoromethane admixed with 15 with said ?xed member during all positions of
lethal agents to form an insecticidal aerosol. In
such use, it has been found unnecessary to open
said deformable member from fully open to fully
closed.
the channel 22 to its full extent to obtain the
4. Variable flow control means comprising a
desired aerosol.
rotatable body member, a deformable resilient
While the invention has been shown in but 20 member in and rotatable with the body member,
one form, it will be obvious to those skilled in
the art that it is not so limited, but is susceptible
of various changes and modi?cations without
departing from the spirit thereof, and it is de
said resilient member having a channel there
through for the passage of ?uid and being
adapted when deformed by engagement with a
?xed member to regulate the flow of ?uid
sired, therefore, that only such limitations shall 25 through said channel between fully opened and
be placed thereupon as are speci?cally set forth
fully closed positions, said deformable member
in the appended claims.
,
having a reduced shoulder portion at its inner
What is claimed is:
end for engaging said ?xed member to deform
1. Variable flow control means comprising a
the deformable member as the body member is
rotatable body member, and a deformable resili 80 rotated toward the closing position, and a rela
ent member in and rotatable with the body mem
tively rigid hollow ferrule attached to said re
ber, said deformable member having a channel
duced shoulder portion.
therethrough for the passage of ?uid and being
WILLIAM B. ANDERSON.
adapted when deformed by engagement with a
HAROLD D. SHAW.
?xed member to regulate the flow of ?uid 85
REFERENCES CITED
through said channel between fully opened and
fully closed positions.
The following references are of record in the
2. Variable flow control means comprising a
?le of this patent:
rotatable body member, and a deformable resili
UNITED STATES PATENTS
ent member in and rotatable with the body 40
member, said deformable member having a chan
Number
Name
Date
nel therethrough for the passage of ?uid and be
34,419
Fuller ___________ __ Feb. 18, 1862
ing adapted when deformed by engagement with
640,878
Curley ___________ __ Jan. 9, 1900
a ?xed member to regulate the flow of ?uid
1,657,663
- Devereux _________ __ Jan. 31, 1928
through said channel between fully opened and
2,146,917
Rosenberger ______ __ Feb. 14, 1939
fully closed positions, said deformable member
2,261,531
Thomas ___________ __ Nov. 4, 1941
having a reduced shoulder portion at its inner
FOREIGN PATENTS
end for engaging said ?xed member to deform
the deformable member as the body member is
Number
Country
Date
rotated toward theclosing position.
3. Variable ?ow control means comprising a
50
355,675
Germany ________________ __ 1922
Документ
Категория
Без категории
Просмотров
0
Размер файла
305 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа