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Патент USA US2117726

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May 17,“ 1938-
R. w. JOHNSON ET AL
2,117,726
VALVE
Filed March 7, 1936
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INVENTOR.
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BY
.
Q. 97f
,
Mad a). _W),;°LM@_
ATTGRNEY.
Patented May 1?’, ih?
2,117,726
VALVE
Roy W. Johnson and Theodore A. Wetzel, Mil
swaukee, Wis, assignors to Automatic Prod
ucts Company, Milwaukee, Wis, a corporation
of Wisconsin
Application March 7, 1936, Serial No. 67,621‘
.8 Claims. (or. rev-e139), the portion of- the valve-stem which extends
downwardly therethrough and this port of the
valve seat communicates with an outlet passage
This invention relates to an improvement in
valvesand although adapted. for a number of
uses and applications may be employed to special
advantage as a refrigerant liquid line control.
One of the objects of thepresent invention is
to provide a valve of this character which is ef
20. Below the passage 20 the stem of the valve.
is enlarged as indicated at 2! and is hollowed in
internally to'eprovide a chamber for a pilot valve
fective and reliable when used to control liquid 22. Above‘ the pilot valve 22 the valve stem I1
under high pressures andyet requires a low cur ' has an axial opening or bore 23. The pilot valve
rent input for the magnetic winding. of the'valve. 3 122 is biased by its own weight to engage‘ a valve.
' Furthermore, there is a low pressure drop through seat 24 threaded into the lower end of the en 10
the
valve.
,
'
>
'
i
larged portion 2| of the valve stem. It will be
noted that the valve seat 24 is ?anged and to
,
' Another object is to provide a valve of this
character and having these advantages and gether with the-adjacent portion of the valve
which is simple and compact in its construction, stem 2| provides a piston which works in a cyl- 15 and so conveniently organized that the various‘ inder or/ sleeve 25. The sleeve .25 has its upper 15
' parts are readily accessible- for purposes of re
., end inter?tted with and suitably secured and
hermetically sealed to the valve body as indicated
at 28 and its lower end is hermetically sealed by
a closure plug 21 to which it issuitably secured.
This cylinder 25 also contains the armature 28
of an electro-magnetdesignated generally at 29
> 2
and having a suitable winding 30 encircling the
sleeve 25 and protected by a'casing or housing 3!
which forms part of the magnetic circuit. The
part of this speci?cation, and in which:
Figure 1 is a view iii side elevation showing a casing 3| is iron or other metal of appropriate
magnetic properties whereas the sleeve 25 is of
2 CI valve providing the present invention;
non-magnetic material such, as brass» In con
Figure 2, is a view thereof in top plan; and
Figure 3 is a view in transverse vertical cross nection with the magnetic action it will be noted
placement or repair. ,\
,
Other objects and advantages reside in certain
novel features of the construction, arrangement
and combination of parts which will be herein
after more fully described and particularlypoint
ed out in the appended claims, reference being
had to the accompanying drawing, forming a
section taken on line 3—3 of Figure 2.
vReferring to the drawlng,-it will be seen that
3 9. the valve comprises generally‘ a5'-‘valve body or
casing 5 provided with an inlet ?tting 6 and‘ an
outlet ?tting 'l. A cap or bonnet 8 is provided
for the valve body and is releasably secured in
position by screws 9. A gasket It] may be pro .>
that a ?ux sleeve 82 is provided which is con
structed of magnetic material such as steel.
-
At the opposite end of the electro-magnetic
winding a ?ux bushing 83 and ?ux washer 34
are provided; The arrangement is such as to pro
vide a complete vmagnetic circuit which effectively
threads the armature.
A valve operating pin 35 is ?xed to and pro
jects beyond the upper end of the armature 28.
In operation, when the winding 30 is energized
the armature 28 'ispulled upwardly with a quick
motion and its pin Sistrilres the lower end of
and into the interior of the cap 8. » A‘sleeve‘? is
the pilot valve 22 thereby unseating this valve.
threadedly interconnected with a central open
ing I3 provided in the valve body. The sleeve l2 The armature 28 has longitudinal slots 28' in its
carries a strainer l4 which is contained within. periphery to facilitate its motion and action.
the chamber within the cap or bonnet 8. The Pressure then flows from the inlet 6, through the
passage ‘I I, through the screen ll, down through
lower endof the sleeve I2 is provided with an in
ternal ?ange or ported partition providing a valve the sleeve l3 and through the longitudinal open
ing 23 of the valve stem into the pilotvalve re
seat I5”
'
A main valve l6 operates in the sleeve 12 and ceiving chamber and thenceraround the pilot valve
‘is threadedly. connected to the upper portion of a and out past its seat. The spaces between the
?ats on the peripheral surface of the pilot valve 50
valve stem ll’. The stem i1 projects upwardly be
yond the valve » l8 and when the valve is open 22 and the internal wallbf its chamber provide
for the free ?ow of the ?uid. The pressure then
engages a perforated stop plate It held in posi
tion in the interior of the sleeve 13 by a resilient V builds up in the chamber 39 below the piston
structure provided at the lower end of the main
expanding ring retainer Isis/The port or cen
tral opening of the valve seat l5 accommodates valve stem. The area which this piston structure 55
vided between the inter‘?tting surfaces of the
body 8 and its cap or bonnet 8. The opening
through
the inlet fitting 6 communicates with a"
r.
passage ll leading up through the valve body
4
45
50
55
.
2
2,117,726
presents to this ?uid pressure is greater than that
presented to the ?uid pressure at the main valve
seat and this combined withthe electrical energy
exerted through the armature 28 quickly unseats
the main valve Hi. The parts remain in this
position as long as the winding 30 is energized.
When the winding 30 is de-energized the pilot
wise closed, an armature in said cylinder below
the piston and having means for opening the pilot
valve when the armature~ is raised, and an elec
tromagnetic winding surrounding the cylinder
and effective when energized to raise the arma- ture to cause opening of the pilot valve and of the
main valve.
'
_
valve 22 closes by gravity. The plunger 28 drops
‘3. A device of the character described com
by gravity and this allows the pilot valve‘ 22 to prising a casing having an inlet‘ and an. outlet
10 seat. The ?t of the piston structure provided
and also having a passageway therebetween, a 10
at the lower end of the main valve stem in its‘ valve'seat insaid passageway,‘a main valve dis
cylinder 25 is suitable to allow the pressures on
posed on the inlet ‘side of the said seat and seating -
the opposite end portions of the main valve to
equalize when the pilot valve 22 is closed andthis
tending downwardly'fromthe main valve and‘
15 occurs in- a rather short interval.
AS'SOOII as
the main valve l6 approaches its seat the pressure
acting on the upper surfaces thereof quicklyv
close it.
By removing the cap or bonnet 8. the sleeve l3
20 may be readily detached and all of the operating
parts of the valve are then- easily removed. Be
cause of the fact that the armature of the magnet
downwardly thereagainst, a‘ mainvalve stem 'ex-‘
formed to provide ‘a pilot valve chamberand a 15
piston,v there being a passage.‘ through the _stem
from one side of the main valve to the other, a.
pilot valve in said chamberfor controlling flow
through said passage, a cylinder/in which said‘
piston isoperatively ‘?tted, an- armature injthe'.
cylinder below the‘piston’and having means» for
opening ‘the pilot valve when the ‘armature is
has imposed upon it onlythe duty of unseating ,
25
raised, said cylinder being of non-magnetic mate-.
the small pilot valve 22, but small current input rial, a.flux sleeve'arrangement disposed on-‘jthe
is required for the electro-magnet.
.
exterior of the cylinder. and an electromagnetic
While we have shown and described one con
winding surrounding‘the-"cylinder and 'e?ective,
struction in which the invention may be‘ ad-_ when energized, in'conjunctiori with said-?ux‘
vantageously embodied, it is to be understood that
this construction has been selected merely for
30 the purpose of illustration or example and that -
various changes in the size, shape and arrange:
#5
40
ment'of the parts may be made without depart
ing from the spirit of the invention or ‘the scope
of~_the subjoined claims.
The invention claimed is.
1. A device of the character described compris
ing a casing having an inlet and an outlet and
also having a passageway therebetween, a valve
seat in said passageway, a main valve disposed
on the inlet side of said seat and seating down
wardly thereagainst, a main valve stem extend
ing downwardly from said main valve and having
sleeve a-rrangement,to cause a magnetic circuit.
to thread thelarmatur'e and ‘raise .‘it to cause '
opening of the pilot valve and vthernain valve;
4. A device of the character described‘ compris- (
ing a casing having an-inlet and an outlet and
‘ also having a passageway therebetween, a sleeve
threadedly connected with said passageway and
provided with a valve seat, a main valve disposed 35
on the inlet side of said seat and seating, down
wardly thereagainst, a main valve stem ,extend
ingdownwardly from the main valve and‘formed '
to provide a pilot valve chamber and a piston,
there being a valve seat in the pilot valve cham 40
ber, a pilot valve ‘biased 'to seat downwardly
against the seat in said pilot valve chamber,
a passage extending therethrough from one side there being a passagewaythrough the stem from '
of the main valve to the other, said passage being one side of the main valve to the other, a cylin
enlarged below said main valve seat to provide a der having its upper end open and secured to 45
pilot valve chamber; a member connected to the ‘the valve casing, said cylinder being otherwise
lower end of said stem and providing va valve closed, said piston being operatively ?tted in said
seat and also coacting with the lower portion of cylinder, and a' removable cap for the casing
the stem to provide a piston, a pilot valve in said’, overlying said sleeve,‘ whereby when the, cap is
chamber and seating downwardly against said removed the sleeve may be unthreaded and the 50
last-named valve seat, a cylinder in which said sleeve, main valve, its stem, pilot valve and piston
removed as a unit.
Q
5.
A
device
of
the
character
described com
its upper end communicating with the outlet side‘ of the main valve and being otherwise closed, an prising a casing having an inlet and an outlet
and, also having a passageway therebetween, a 55
55 armature in said cylinder below the piston and
having means for opening the pilot valve when valve seat in said passageway, a. main valve dis
the armature is raised and an electromagnetic posed on the inlet side of said seat and seating
piston is operatively ?tted, 'said cylinder having
downwardly thereagainst, a main valve stem/‘ex
tending downwardly from‘ said main valve and
when energized to raise the armature‘ to cause
opening of the pilot valve and of the main valve. having a. passage extending therethrough from 60
one side of the main valve to the other, said pas
2. A device of the character described compris
sage being enlarged below said main valve seat to
ing a casing having an'inlet and an outlet and
also having- a passageway therebet'ween, a valve 7 provide a pilot valve chamber, means at the lower
seat in-said passageway‘; a main valve disposed‘; ‘ end of the main valve stem providing a piston,
there being an upwardly facing seat in said pilot 65
on the inlet side of said seat and seating down:
wardlythereagainst, a main valve stem extend-‘7 valve chamber, a pilot valve in said chamber and
/‘winding surrounding the cylinder and effective
ing downwardly from the main valve and formed
to provide a pilot valve chamber and a piston,
there being a passage through the stem from one
70 side of the main valve to the other, a pilot valve
in said chamber for controlling ?ow through said
passage, a cylinder in which said piston is'op
eratively ?tted, said cylinder having its upper
end secured to said casing and communicating
75 with the outlet thereof, said cylinder being other
seating downwardly against said last-named
valve seat, a cylinder in which said piston is op
eratively ?tted, said cylinder having its upper end
communicating‘ with the outlet side of the main 70
valveand being otherwise closed, an armature
in said cylinder below the piston and having
means for opening the pilot valve when the arma
ture is raised and an electromagnetic winding
surrounding the cylinder and e?‘ective when ener 75
2,117,726
'gized to raise the armature to cause opening of
the pilot valve and of the main valve.
.
6. A device of the character described com
prising a casing’ having an inlet and an outlet
and also having a passageway therebetween, a
valve seat in said passageway, a main valve dis '
‘posed on the inlet side of said seat and seating
downwardly thereagainst, a main valve stem ex
tending downwardly from said main valve and
having a passage therethrough from one side of
10
- the main valve to the other, said passage being
enlarged below said main valve seat to provide a
pilotvalva chamber, there being a valve seat at
3
the main valve to the other, said passage being
enlarged below said main valve seat to, provide a
pilot valve chamber, a ?anged nut connected with
the lower end of the main valve stem to provide a
valve seat and also to coact- with the main valve
stem to provide a piston structure, a pilot valve in
said chamber and seating downwardly against'
said last-named valve seat, and a cylinder in
which said piston structure is operatively ?tted.
8. A valve comprising acasing having an inlet 10
and an outlet and provided‘ with‘ a passageway
extending to the outlet, a sleeve threadedly con- '
nected with said passageway and provided with a
the lower end of the pilot valve‘ chamber, a pilot ‘ valve seat, a main valve cooperating-with said
valve ,in said chamber and seating downwardly valve seat and having a stem provided with a
715 against said last-named seat, -‘the lower portion pilot valve and‘a'fpiston, a'perforated stop plate
‘of the valve stem being constituted to provide a secured‘to the sleeve and cooper-able with the
valve to limit the opening movement there-'
piston structure,- and a cylinder in which said main
of, a cylinder coacting with the piston, electro
. piston is. operatively ?tted.
magnetic means for opening the pilot valve, and
~ '1. A device of the; character described‘ com
a removable cap, cooperating with the casing to
complete the enclosure of the sleeve, said casing
posed ronithe inlet side ‘of said seat and seating also ‘having a passageway extending from the
downwardly thereagainst, a main valve stem ex- , vinlet to the'interior of the cap.
25
ROY ‘W. JOHNSON.‘
.
‘tending
downwardly from said main valve‘and
25
THEODORE
A.
WETZELV
having a passage therethroughi’rom one side of
7 prising a casing having an inlet and an outlet
and also having a passageway, a mainvalve dis
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