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Патент USA US3045698

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July 24, 1962
J. P. FA'Y
3,045,688 /
FIRST STAGE REGULATOR
Filed April 10, 1961
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INVENTOR. ‘
Jame/s F ,zfay
States Patent
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1
3,045,688
FIRST STAGE REGULATOR
James P. Fay, 18 France St., Norwalk, Conn.
Filed Apr. 10, 1961, Ser. No. 101,884
11 Claims. (Cl. 137-63)
This invention relates to a regulator for breathable
gases and more particulardly to a ?rst stage regulator hav
ing a built-in reserve for use in a single hose diving device.
3134568
Patented July 24, 1962
2
into the expansible chamber and a second passage 33
extending into the body from the input chamber and hav
ing a spring controlled, pressure controlled valve 34 there-'
in. The passages 30 and 33 are located adjacent one an;
other and are connected by a transverse bore 35 as shown‘
in FIG. 4. The bore 35 is closed by a plug 36 threaded
therein. The pressure controlled valve in the normal op
erating passage is normally closed, but is opened by the
flow of gas in the passage due to the pressure differential
It is an object of the invention to provide a ?rst stage 10 between the input and expansible chambers. When the
pressure differential between the input chamber and the
regulator which is simple in construction, easy and reliable
in operation, and which can be readily assembled and, if
desired, disassembled for checking and replacing the com
ponent parts thereof.
expansible chamber falls below a predetermined value,
the ?ow of air through the normal operating passage is
prevented.
It is another object of the invention to provide a ?rst 15
The housing has at least one reserve passage extending
stage regulator with a built-in reserve which is safe and
from the output chamber directly from the input chamber.
accurate and which can be readily operated by the user.
In the illustrated form of the invention, I have provided
Other features and advantages of the invention will be
two such passages 37, 38 each having a valve 39, 40
apparent from the speci?cation and claims when con
therein provided with an actuator 41, 42 projecting into
sigerield in connection with the accompanying drawings in 20 the expansible chamber for controlling the passage of air
W 10 :
therethrough in order to insure an adequate supply of air
FIGURE 1 is a longitudinal sectional View of the device
during the reserve operation of the regulator.
taken along lines 1~1 of FIG. 2.
As noted in FIGS. 1 and 3, the valve actuators for the
FIG. 2 is a sectional view of the device taken along
normal and reserve control valves are located in the wall
lines 2-2 of FIG. 1.
25 43 of the expansi-ble chamber opposite the piston and are
FIG. 3 is a sectional view taken along lines 3-3 of
disposed at opposite sides of the chamber so as to be
'
readily selectively operated. In order to selectively op
FIG. 4 is a fragmentary sectional view taken along lines
erate the valve actuators for controlling the ?ow of breath
4-4 of FIG. 1.
able gas to the expansible chamber, the piston has on its
F
5 is a sectional view taken along lines 5--5 of 30 face a valve operator 44 of a size to be positioned to
I
.
.
selectively engage the actuating members of the valves to
FIG. 6 is a side view of the device in position on the
control the passage of air from the normal operating or
neck of a tank.
reserve passages. The positioning of the operator is ac
As is shown in the drawings, the ?rst stage regulator
complished 'by rotating the piston by means of the hand
comprises an elongate body or housing 10 having a yoke 35 wheel 26. The housing has a stop 45 thereon, located in
11 secured thereto at one end adapted to be slipped over
the expansible chamber and having a shoulder 46 for
a neck 12 of a tank of compressed air or the like breath
engaging the operator when the piston is rotated in one di
FIG. 1.
able gas 13 and to be clamped in place thereby by a screw
rection to locate the valve operator above the actuator
14 threaded in the yoke which presses the neck of the tank
member 32 for the normal passage when the piston moves
against the adjacent end of a housing. The neck of the 40 toward the valve actuator in response to decrease of pres
tank has the usual opening (not shown) for communicat
sure in the expansible chamber as it is withdrawn by the
ing with an input chamber 15 formed in the end of the
user. When the operator engages the actuator for the
housing. If desired, the input chamber can be provided
valve, air from the supply is fed into the expansible cham
with a microporous ?lter 16 extending thereover and held
ber to restore the pressure therein and lift the piston and
in place by a usual snap ring 17 or the like. The other end 45 operator thereon out of engagement with the valve actu
of the housing is provided with a bore ‘18 forming a cylin
ator 32. When the pressure at the supply falls to a pre
der having a piston 19 movable therein to form an ex
determined value such that the differential of pressure be
pansible chamber 20 at the inner end of the bore, the
tween the source and the expansible chamber is less than
piston having a resilient O-ring 21 thereon mounted in
a predetermined amount and passage of air will be stopped
groove 19a for sealing the chamber and a piston rod 22
by the valve 34 and no air will pass into the expansible
extending rearwardly therefrom through the other end
chamber, it will give the user notice that it is time to turn
of the housing. A spring 23 is disposed around the piston
to the reserve supply. The user then rotates the piston by
rod and has one end engaging the back of the piston and
means of a handwheel 26 to the dot-and-dash position in
the other end abutting a Washer 24 disposed in the end
FIG. 3 in which the operator engages the other shoulder
of the bore and locked in place by a spring washer 25.
47 on the stop 45 in which position the operator is dis
The spring urges the piston in the direction of the opposite
posed in operative relationship with the actuators 41, 42
wall of the expansible chamber. A handwheel 26 for
for the valves in the reserve passages and operation of the
rotating the piston in the bore is secured to the end of
piston will cause the valves to be actuated and supply the
the piston rod by a removable pin 27 or the like securing
reserve air to the inhalation chamber.
60
means.
Preferably, the stop ‘45 is provided with an upper surface
The expansible chamber is provided with a ?tting 28 to
48 for engaging the piston and preventing the piston from
moving toward the opposite wall to such a position in
which a hose 2.9 of a single hose diving device (not shown)
is connected so that the expansible chamber is responsive
which it might damage the valve actuators.
to the removal of air therefrom by inhalation from the
To facilitate the movement of the operator between
diving device.
As shown in FIG. 1, the input chamber is connected to
the expansible chamber by a plurality of passages forming
the normal and reserve passages of the regulator. The
normal operating passage comprises a ?rst passage 30 ex
tending into the body from the expansible chamber and
having a valve 31 provided with an actuator 32 projecting
65 normal and reserve positions without damaging the ac
tuators projecting into the expansible chamber, the body
is provided with a cam 49 cooperating with the oper-tor
so that as the piston is rotated it retracts the operator
out of contact with the actuating members for the valves
and maintains the operator in raised position until it
is moved over the actuators ‘for other valves where it is
3,045,688
4
3
permitted to descend directly upon the valve actuators
without applying lateral pressure thereto as might bend
them or ‘damage them.
‘In the event the pressure in the expansible chamber
becomes excessive, the regulator of the present invention
provides a safety device in the form of pressure release
means. This means is formed by enlarging the outer
end of the bore 18, as shown in FIG. 1, so that when there
is excess pressure in the expansible chamber it will push
the piston back into the enlarged bore and permit the gas
let adapted to be connected to an inhalation hose; normal
and reserve passages connecting said input chamber and
said expansible chamber, said normal passage having a
pressure responsive check valve and each of said pas
sages having a valve provided with an actuator exposed
in said expansible chamber, said expansible chamber hav
ing a movable Wall provided with a projecting operator
thereon adapted to be positioned to selectively engage
the actuators for the valves; means normally urging the
10 operator portion into valve-engaging position when pres
to by~pass the piston and escape ‘from the end of the
sure in the expansible chamber falls below a predeter
housing.
mined value; manually rotatable means for moving the
valve operator; and stop means for locating the operator
portion in a selected position to engage the desired actu
The regulator of the present invention while intended
to be used with the usual tank of breathable gas can
also be used with a source of supply, such as a compres
sor or the like mounted in a boat and connected thereto
by a hose. This is accomplished by removing the plug
36 from the connecting bore and by connecting a hose
having a nipple (not shown) to the bore. Also, if de
ator for the proper valve.
4. In a regulator, a housing having an input chamber
‘adapted to be connected to a source of breathable gas
under pressure and an expansible chamber having an out
let adapted to be connected to an inhalation hose; normal
sired, a suitable pressure gauge (not shown) can be 20 and reserve passages connecting said input chamber and
threaded into the bore 35 when the plug is removed
for the purpose of testing the regulator.
The regulator of the present invention is simple in
construction, involving but a few parts which can be
readily assembled. The valves employed can be standard 25
Schrader or Dill valves which can be quickly threaded
into place. When it is desired to disassemble the regu
lator, it is merely necessary to remove the snap rings 17
and 25 after which the ?lter and piston assembly can be
removed from the housing exposing the valves for in
spection or replacement.
Variations and modi?cations may be made within the
scope of the claims and portions of the improvements
may be used without others.
Iclaim:
1. ‘In a regulator, a housing having an input chamber
adapted to be connected to a source of breathable gas
under pressure and an expansible chamber having an out
said expansible chamber, said normal passage having a
pressure responsive check valve and each of said passages
having a valve provided with an actuator exposed in said
expansible chamber, said expansible chamber having a
movable Wall provided with a projecting operator thereon
adapted to be positioned to selectively engage the ac
tuators for the valves; means normally urging the op
erator into valve-engaging position when pressure in the
expansible chamber falls below a predetermined value;
manually operable means ‘for moving the valve operator
into a selected position to engage the desired actuator
for the proper valve; and means operable incident to the
movement of the valve operator between selected posi
tions for moving the operating portion to a retracted
position out of engagement with the actuators whereby
lateral pressure on the actuators is prevented.
5. In a regulator, a housing having an input chamber
adapted to be connected to a source of breathable gas un
let adapted to be connected to an inhalation hose; nor
mal and reserve passages connecting said input chamber
and said expansible chamber, said normal passage hav
ing a pressure responsive check valve and each of said
der pressure and a cylinder having a piston movable
therein to form an expansible chamber adapted to be
connected to an inhalation hose; a plurality of passages
extending from the input chamber to the wall of the ex
passages having a valve provided with an actuator ex
pansible chamber opposite said piston, each passage
posed in said expansible chamber, said expansible cham
having a valve provided with an actuator projecting into
ber having a movable Wall provided with a valve operator 45 the expansible chamber, one passage forming the normal
portion adapted to be positioned to selectively engage the
operating passage having means therein preventing ?ow
actuators for the valves; means normally urging the
of gas therethrough when the pressure differential between
operator portion into valve-engaging position when pres
the source and the expansible chamber is below a pre
sure in the expansible chamber falls below a predeter
determined value, said piston having a valve operator
mined value; and manually operable means for moving 50 projecting therefrom adapted to be positioned to selec
the valve operator portion into a selected position to
tively engage the desired valve actuators; means normally
engage the desired actuator for the proper value.
urging the piston to valve engaging position; and means
2. In a regulator, a housing having an input chamber
for rotating said piston for positioning the operator to
adapted to be connected to a source of breathable gas
engage the proper actuator when pressure in the expan
under pressure and an expansible chamber having an 55 sible chamber is below said predetermined value.
outlet adapted to be connected to an inhalation hose;
6. In a regulator, a housing having an input chamber
normal and reserve passages connecting said input cham
adapted to be connected to a source of breathable gas
ber and said expansible chamber, said normal passage
under pressure and a cylinder having a piston movable
having a pressure responsive check valve and each of
therein to form an expansible chamber adapted to be
said passages having a valve provided with an actuator
connected to an inhalation hose; a plurality of passages
exposed in said expansible chamber, said expansible
extending from the input chamber to the Wall of the ex
chamber having a movable wall provided with a valve
pansible chamber opposite said piston, each passage hav
operator portion adapted to be positioned to selectively
ing a valve provided with an actuator projecting into the
engage the actuators for the valves; means normally urg
expansible chamber, one passage forming the normal
ing the operator portion into valve-engaging position 65 operating passage having means therein preventing ?ow of
when pressure in the expansible chamber falls below a
gas therethrough when the pressure differential between
predetermined value; manually operable means for mov
the source and the expansible chamber is below a pre
ing the valve operator portion into a selected position to
determined value, said piston having a valve operator
engage the desired actuator for the proper valve; and
projecting therefrom adapted to be positioned to selec
stop means for limiting the movement of the movable 70 tively engage the desired valve actuators; means normally
wall in the direction of the ‘actuators whereby undue
urging the piston to valve engaging position; means for
pressure on the actuators is prevented.
rotating said piston; and stop means on the housing co
3. In a regulator, a housing having» an input chamber
operating with the piston for positioning the operator to
adapted to be connected to a source of breathable gas
engage the proper actuator when pressure in the expan
under pressure and an expansible chamber having an out 75 sible chamber is below said predetermined value.
8,045,688
5
7. In a regulator, a housing having an input chamber
adapted to be connected to a source of breathable gas
under pressure and a cylinder having a piston movable
therein to form an expansible chamber adapted to be con
nected to an inhalation hose; a plurality of passages ex
tending from the input chamber to the wall of the ex
pansible chamber opposite said piston, each passage
6
expansible chamber opposite said piston, one passage
forming the reserve supply directly connecting said cham
bers and the other passage forming the normal supply
and having means therein for preventing ?ow there
through when the pressure differential between said cham
bers is below a predetermined value; control valves in
each passage having an actuator projecting into the ex
pansible chamber, said piston having a valve operator
having a valve provided with an actuator projecting into
projecting from the face thereof; means urging the piston
the expansible chamber, one passage forming the normal
operating pass-age having means therein preventing ?ow 10 to valve-actuating position when the pressure in the ex
pansible chamber falls below a predetermined value; and
of gas therethrough when the pressure differential be
manually operable means for rotating said piston to cause
tween the source and the expansible chamber is below
the valve operator to selectively engage the valve con
a predetermined value, said piston having a valve oper
trolling the normal and reserve supplies.
ator projecting therefrom adapted to be positioned to
‘10. ‘In a regulator, a housing having an input chamber
selectively engage the desired valve actuators; means nor 15
mally urging the piston to valve engaging position; means
for rotating said piston; and stop means on the housing co
operating with the piston for positioning the operator to
adapted to be connected to a source of breathable gas
under pressure and a cylinder having a piston movable
therein to form an eXpansible chamber adapted to be
connected to an inhalation hose; a pair of passages ex
engage the proper actuator and for preventing undue
pressure of the operator on the actuator when pressure 20 tending from the input chamber and opening in the wall
of the expansible chamber opposite said piston, one pas
sage forming the reserve supply directly connecting said
chambers and the other passage forming the normal sup
ply and having means therein for preventing ?ow there
adapted to be connected to a source of breathable gas
under pressure and a cylinder having a piston movable 25 through when the pressure differential between said cham
bers is below a predetermined value; control valves in
therein to form an expansible chamber adapted to be con
in the expansible chamber -is below said predetermined
value.
8. In a regulator, a housing having an input chamber
nected to an inhalation hose; a plurality of passages ex
tending from the input chamber to the Wall of the ex
pansible chamber opposite said piston, each passage hav
each passage having an actuator projecting into the ex
pansible chamber, said piston having a valve operator
projecting from the face thereof; means urging the piston
to valve-actuating position when the pressure in the ex
pansible chamber falls below a predetermined value;
manually operable means for rotating said piston to cause
operating passage having means therein preventing ?ow
the valve operator to selectively engage the valve con
of gas therethrough when the pressure diiferential be
trolling the normal and reserve supplies; and means for
tween the source and the expansible chamber is below a
predetermined value, said piston having a valve operator 35 retracting the operator on the piston from actuator en
ing a valve provided with an actuator projecting into the
expansible chamber, one passage forming the normal
projecting therefrom adapted to be positioned to selec
tively engage the desired valve actuators; means nor
gaging position incident to the rotation of the piston where
by lateral pressure on the actuator by the operator during
said rotation is avoided.
11. The invention as described in claim 5, wherein
engage the proper actuator when pressure in the ex 40 the normal operating passage comprises a passage open~
mally urging the piston to valve engaging position; means
for rotating said piston for positioning the operator to
pansible chamber is below said predetermined value; and
means operable during rotation of the piston for moving
the piston to a retracted position wherein the operator is
held clear of engagement with the actuators during said
rotation whereby lateral pressure and damage of the 45
actuators is prevented.
9. In a regulator, a housing having an input chamber
adapted to be connected to a source of breathable gas
ing to the input chamber, a juxtaposed passage opening
to the expansible chamber and a transverse bore in the
housing extending from one side thereof with the inner
end intersecting said passages, said bore being closed at
the outer end by a threaded plug.
References Cited in the ?le of this patent
UNITED STATES PATENTS
under pressure and a cylinder having a piston movable
therein to form an expansible chamber adapted to be con 50
nected to an inhalation hose; a pair of passages extending
2,939,411
Fay __________________ __ June 7, 1960
from the input chamber and opening in the Wall of the
1,203,984
France _______________ __ Aug. 3, 19'59
FOREIGN PATENTS
UNITED STATES PATENT OFFICE
CERTIFICATE OF CORRECTION
Patent No. 3,045,688
July 24, 1962
James P. Fay
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below.
‘
Column 1, line 8, for "particular'dly" read —- particularly
—-; column 2,
3,
line 52,
line 67, for "opertor" read —— operator -—; column
for "value" read -- valve ——.
Signed and sealed this 13th day of November 1962.
(SEAL)
Attest:
ERNEST w. SWIDER
DAVID L. LADD
“testing Officer
Commissioner of Patents
_
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