вход по аккаунту


Патент USA US2132035

код для вставки
Oct. 4, 1938.
Filed June l. 1956
m o-àîgwa,
Patented Oct. 4, v1938
2,132,035 y
UN-i'rao s'rA’rlì-:s PATENT OFFICE
- 2.182.055
ma Ex‘rmamsm
Hugo Leipold, Buihlo, N. vY., “signor to Bull'alo
Fire Appliance Corporation, Buffalo, N. Y., a
corporation o! New York
Application .me 1, 193s, semi No. 82,803
z calm». (ci. 29o-:m
This invention relates to a iire extinguisher
and more particularly to a iire extinguisher of
the portable type comprising a liquid receptacle
within which is arranged a double acting pump
g actuated by a plunger and handle to forcibly
eject the liquid from the receptacle on both the
inward and outward movements of the plunger
and regardless of the position in which the extin
guisher may be held.
One of..-the principal diillculties in extinguish
ers of this type is to provide such an extinguisher
which, when not in operation, ls sealed 'both
against the escape of the» ñre extinguishing liq
uid and also sealed against the entrance of air
15 but which will, Awhen operated, permit air to enter
the receptacle and replace the ilre extinguishing
liquid as it is discharged. ~To permit this, the
principal object of the invention is to provide,
as a seal for the plunger, a. series of thin disk
20 like metal washersV alternatingA with fiber wash
‘ ers, the metal washers when the plunger is in
repose providing a liquid and air-tight seal and,
when ñexed by the movement of the plunger,
permitting air to pass and displace the liquid
25 being discharged.
Another purpose of the present invention is
supports a discharge tube Ill which is’rigidly se
cured to the nozzle 8 and projects through an
opening II provided in the opposite end head 1.
The pump includes a cylinder I2 and a plunger
I3 which is disposed inside of the cylinder I2
and surrounds the discharge tube III. One end
of the cylinder I2 is enclosed by an end head I 4
which is preferably die cast and is rigidly secured
to the cylinder I2. This end head Il is formed
to provide a bearing I5 which engages the discharge tube I0 near the discharge end thereof.
In order to prevent leakage past the bearing I5
the outer end of the end head Il is recessed and
a felt washer I6 is placed in this recess and held
therein by a metal washer I1 which can be secured to the end head I4 in any suitable manner.
In order to prevent corrosion from aiïecting the
free rotation of the pump cylinder and end head
I 4 a felt washer I8 is arranged around the dis
charge tube I0 and between the discharge nozzle
8 and the washer I1. The opposite end of the
pump cylinder I2 is enclosed by an end head 20
which is also preferably made in the form of a
die casting and is formed to provide a bearing
2| which is supported by the pump plunger I3. 25
This head 20 is rigidly secured to the cylinder.
to provide a simple and inexpensive means for
Leakage is prevented through the bearing 2| by
insuring a discharge of the liquid regardless of
the position in which the extinguisher may be
a felt washer 22 and this felt washer is retained
in place by a bronze washer 23 which also serves
to provide additional bearing surfaceV for'the head 30
30 held and in particular to provide a simple and
Y inexpensive construction of the check valves used
in conjunction with the double acting pump.
A further object of the present invention is
to insure free rotation of the pump casing within
35 the receptacle and in particular to employ a felt
' washer between the pump and the casing so as‘
to prevent corrosion at this point and consequent
interference with the free rotation of the pump.
Another object of the present invention is to
V4.0 provide adequate means for stripping all of the
‘ liquid from the pump plunger as it is withdrawn.
In the accompanying drawing:
Fig. 1 is a longitudinal central section, through
a fire extinguisher embodying my invention.
Figs. 2 and 3 are transverse sections. taken on
20 in its movement around the plunger I3.
The plunger I3 operates a piston 2,5 which has
a limited sliding movement on the plunger I3.
'I'his piston 25 can be of any suitable form but -
is preferably provided with felt packing rings 35
26 to prevent the escape of liquid past the piston.
'I'he limited sliding movement of the piston 25
is provided by a stop ring 21 rigidly secured
around the plunger I3 and an end nut 28 which
is screwed on the inner end of the plunger and 4o
also serves to enclose the end of the plunger.
This nut 28 provides a bearing 29 around the dis
charge tube III which prevents the escape of ex
tinguisher liquid from inside of the plunger into
the end of the pump cylinder near the discharge 45
the correspondingly numbered lines of Fig. l.
Fig. 4 is a fragmentary view similar to Fig. l.l
end of the extinguisher. As the plunger is recip- .
on an enlarged scale.
between the ring 21 and the nut 28. In one ex
The ñre extinguisher is shown as having a
50 cylindrical casing 5 having an end head 6 through
which the ñre extinguisher liquid is discharged
and having an end head 1 through which the
pump is operated. A discharge nozzle 8 extends
through and is secured to the head 5 and is pro
55 vided with a discharge oriñce 9. This nozzle B
rocated the piston 25 is moved back and forth
treme position lit covers aseries of ports 30, as
illustrated in Fig. 1, and in the other‘extreme 50
position it covers the series of ports 32.
In order to provide for the necessary check
valves and also to withdraw the ñre extinguisher
liquid from the bottom of the receptacle 5 re
gardless of what position the container may as- 55
sume each end head I4 and 28 is extended later
ally in the same direction as indicated at 33 and
34. These extensions form weights which serve
to rotate the entire pump cylinder as the con
tainer 5 is rotated. The lateral extension 33 is
formed to provide a ball cage 35 for an inwardly
opening check ball 36 which seatr on a seat sur
, rounding an orifice 31.
The ball 36 is retained
in the cage 35 by the pump cylinder I2 and in
10 order to permit the extinguisher liquid passing
the check ball 36 to enter the corresponding end
of the cylinder I2 a slot 38 is provided in the
side of the cylinder registering with the cage 35.
This slot 38 is, of course, smaller than the check
15 ball 36 so that the ball 36 cannot enter the pump
cylinder. The lateral extension 34 of the oppo
site end head 20 is likewise formed to provide a
ball cage 40 which houses a check ball 4I seat
ing around an orifice 42 in the lateral extension.
20 The pump cylinder l2 is provided with a slot 43
registering with the cage 40, which slot permits
the liquid to be drawn past the check ball 4| into
the corresponding end of the pump cylinder I2
but retains the ball 4I in the cage 40. The two
25 lateral extensions 33 and 34 are connected by a
tube 45 which is preferably arranged parallel with
the major axis of the ñre extinguisher and corn
municates at one end with a passage 46 _in the
lateral extension 33 and at its other end with a
30 passage 41 in the lateral extension 34. The pas
sage 46 communicates with the orifice 31 and at
its outer end is formed to provide a. seat 48 against
which a ball 49 is adapted to seat. This ball 49
is contained within a chamber 50 which is en
the interior of the plunger I3 into the interior
chamber 'l0 of a handle 1I. This handle 1I has
a screw connection with the nut 68, the nut 68
being provided with screw driver slots 12 in order
to screw it into the handle 1I. The escape of
liquid from the chamber 10 is prevented by a
pair of cork washers 13 and also by a washer 14
which, when the handle is locked in position,
has a sealing engagement with the collar 6I. In
order to prevent the cork washer 13 from being
ground against the screw driver slot 12 as the
handle is turned, a protecting washer 15 is pro
vided. The locking means for the handle con
sists of a pair of ears or lugs 16 extending out
wardly from the base of the handle 1I and
adapted to engage under segmental locking
shoulders 18 provided on opposite sides of the
locking ring 62. It will beunderstood that the
underside of these shoulders 18 are inclined so
that when the :ears 16 are caught under these 20
shoulders and the handle is turned a quarter
turn or less the washer 14 and cork washers 15
are compressed to provide a tight seal.
As an additional seal against the escape of
liquid from the fire extinguisher the end of the
liquid discharge tube I0 is sealed when the
handle is locked. To this end a small cup
shaped cap 80 is arranged in the chamber 10 of
the handle and is provided with an open end in
which the end of the discharge tube I0 enters.
The sealing cap 80 contains a plurality of seal
ing disks 8i, that engaging the end of the tube
` I0 being preferably made of rubber, or the like,
and being backed by fiber disks. A compression
35 closed by a disk 5I. An oriñce 52 at the extreme
lower corner of the extension 33 nearest to the
head 6 establishes communication between the
spring 82 is arranged in back ol' the sealing cap
80 in order to firmly and yieldingly press the cap
against the end of the discharge tube.
chamber 5U and the interior of the receptacle 5.
With the extinguisher constructed as above
described and filled with liquid through a filling
opening closed by a plug 83 the operation of the
extinguisher is as follows, it being assumed that
it is desired to discharge a stream of ñre extin
The passage 41 of the lateral extension 34
40 communicates with the oriñce 42 and is also
formed to provide a seat 55 against which a ball
56 seats. This ball is contained Within a cham
ber 51 which is enclosed by a disk 58 similar to
the disk 49. Communication between the cham
45 ber 51 and the interior of the receptacle is es
tablished by a small port 59 at the lower corner
of the extension 34 nearest to the end head 1 of
the receptacle. The two balls 49 and 56 are con
nected by a rod 60 so that when one is seated on
50 its seat the other is positively unseated. I
A gland which also forms the air admitting
means is provided between the plunger I3 and
the end head1. This gland includes a collar 6I
extending centrally through the end head 1 and
55 soldered or sweated to this end head is a locking
ring 62 which is secured to the outer face of the
end head 1, teats` 63 being provided in the
end head 1 and engaging recesses in the lock
ing ring 62 to assist in preventing rotation of the
60 locking ring 62. The collar 6I is recessed and in
this recess are provided three fiber washers 64
alternating with thin, disk-like bronze washers
65. The bronze washers 65 have a working clear
ance (.003 of an inch) around the plunger I3
65 and are bodily displaced and also distorted, to
gether with the intercalated fiber washers when
the plunger is moved in either direction. A
washer 66 between the end head 20 of the pump
cylinder and the collar 6I serves to retain the
70 liber and bronze washers 64, 65 in operative posi
tion in the recess in the nut 6 I.
To the end of the plunger I3 is screwed anut
68 which extends beyond the end of the plunger
and is formed to provide a space 69 which per
75 mits the ñre extinguishing liquid t0 escape from
guishing liquid downwardly.
The operator ñrst turns the handle a quarter
turn so as to release the locking ears 16 from
under the quadrantal shoulders 18 of the locking
ring 62. 'I’his permits him to draw the handle 1I
outwardly and since this handle is connected
through the nut 68 with the plunger I3 this
movement draws the plunger I3 outwardly. 'I‘he
pressure of the liquid in the end of the cylinder
I2 causes the piston 30 to move against the end
cap or nut 29. This closes the ports 32 and opens
the ports 30. At the same time> the outward
movement of the handle 1I releases the sealing
cap 80 from engagement with the end of the 55
discharge tube I0. Consequently, the tire ex
tinguishing liquid contained in that end oi' the
pump cylinder I2 nearest to the head 1 will be
forced through the ports 30; through the space
between the plunger I3 and the discharge tube;
and through the space between the nut 68 and
the discharge tube into the chamber 10 in the
handle from which it is discharged through the
open end of the discharge tube I0 and out
through the discharge nozzle 8.
As the plunger is moved outwardly the piston
25 draws the iire extinguishing liquid from the
receptacle 5 through the port 52 into the cham
ber 50 and past the ball 49 into the passage 46, 70
this ball 49 being unseated when the ilre ex
tinguisher is tilted downwardly, as assumed, and
the ñre extinguishing liquid from the passage 46
is drawn past the check ball 36 and slot 38 into
the end oi’ the cylinder nearest to the end head 75
6. This end of the cylinder I2 is therefore ñlled
while the opposite end is being discharged.
When the operator reaches the end of the out
ward stroke he moves the handle inwardly. This
Ul immediately causes the piston 25 to move against
the collar 21, thereby closing the ports 30 and
opening the ports 32, and also causes the ball
check 36 to seat. Therefore the fire extinguish
ing liquid in the end of the pump cylinder i2
nearest to the end head 6 is forced through the
ports 32 up the plunger I3, past the nut 68 into
the chamber 1I! in the handle 1I, from which it
fiber washers permits air to pass between the .
washers- and the piston rod and also between
these washers and the socket in which they are
located, breaking any liquid seal and thereby
for the
extinguisher. CH
Without the metal washers floatingly supported
between the ñber washers the felt would com
press and become set or permanently packed at
the end of the socket. By the provision of lami
nations of flexible metal and ñber washers this
permanent compression or setting of the felt
packing is avoided and the packing maintained
At the same time fire extinguishing
at full efficiency as a breather and seal.
From the foregoing it is apparent that the
liquid is drawn into the opposite end of the
pump cylinder I2 through the port 52, chamber
50, past the unseated ball 49, passage 45, tube
present invention provides a very simple and in
expensive hand operated fire extinguisher of the
double acting pump type in which the mecha
is discharged through the discharge tube IB and
nozzle 8.
45, passage 41, oriñce 42, past the check ball
nism is simplified and the cost reduced as com
4I and through the slot 43.
Since the entire pump cylinder I2 and its end
pared with other fire extinguishers of this type
and in which the fire extinguisher will continue 20
to function properly without danger of the parts
heads I4 and 20 are free to rotate around tht
discharge tube I0 and plunger I3, the lateral exY
tensions 33 and 34 always assume the dependent
position shown in Fig. 1. Therefore the extin
guishing liquid is drawn from the lowermost part
of the receptacle 5 because the balls 49 connected
by the bar 60 insure that the ñre extinguishing
corroding and sticking. It will further be seen
that applicant’s' means for permitting the en
trance of air to replace the liquid discharged
from the receptacle provides an air and liquid
tight seal when the fire extinguisher is not being
used and also provides a means for stripping any
liquid is only withdrawn through the port 52 or ` fire extinguishing liquid remaining on ther
plunger I3 before it is withdrawn from the
59 of that end head which is lowermost. There
fore in the downwardly tilted position of the fire receptacle.
I claim as my invention:
extinguisher assumed substantially the entire
1. A packing and breather for a plunger pump
contents of the extinguisher will be withdrawn
through the port 52 and discharged.
mounted in an enclosed container and discharg
If it is desired to discharge the contents of the ing the liquid therefrom, comprising a member
ñre extinguisher upwardly the tilting of the ex
mounted on said container and surrounding said
tinguisher causes the ball 49 to seat and the ball plunger, said member being formed to provide a
56 to unseat and therefore the liquid from the cylindrical socket around said plunger, a plural
receptacle will be entirely discharged through ity of ñbrous washers in said socket and around
said plunger and a plurality of metal washers
the port’59.
intercalated with said ñbrous washers and free
It will be appreciated that the free rotation o
to be bodily displaced under the inñuence of the
the pump cylinder is essential and to this end
the fiber washer I8 is employed to prevent any piston rod thereby to permit the passage of air
corrosive sticking between the washer I`1 and the through _the packing while said piston rod is
discharge nozzle 8. It will also be noted that the being moved and preventing a permanent com
pression of the packing.
45 cage for the check balls 36 and 4I is provided in
2. A packing and breather for a plunger pump
part by the pump cylinder I2 by the simple ex
pedient of providing the slots 38 and 43 in the mounted in an enclosed container and discharg
cylinder. This avoids the/unnecessary expense ing the liquid therefrom, comprising a. member
mounted on said container and surrounding said
of specially forming the entire check valve as
plunger, said member being formed to provide a
sembly in the end heads.
As the liquid is discharged from the receptacle cylindrical socket around said plunger, a plu
5 it is necessary to replace the discharge liquid rality of flat disk-like ñbrous washers in said
with air since otherwise a partial vacuum would socket and around said plunger and a plurality
be created which would lprevent the complete of fiat, ñexible metal washers intercalated with
discharge of the contents. Applicant effects the said ñbrous washers and free to be bodily disadmission of air through the gland in the end placed and iiexed under the influence of the pls
head 1 by means of the thin metal washers B5 ton rod thereby to permit the passage of air
interposed between the fiber washers 64. As the through the packing while said piston rod is
piston rod I3 is moved in either direction it being moved and preventing a permanent com
displaces the metal washers 65 and also pression of the packing.
yon Ilexes these
washers and distorts the packing as
a whole. 'I'he bodily movement of the metal and
Без категории
Размер файла
566 Кб
Пожаловаться на содержимое документа