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Патент USA US2118681

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May 24; 1938'
w. F. MACDONALD.
‘
2,118,681
PUMP snub-me" MEANS
F‘iled June 4, 1935
> 0
w 3.
INVENTOR
Mun“, i. MW
BY
’
ATTORNEY5
Patented May 24, 1938
g
p
anneal
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sumo Means
William it‘. Macdonaid, Bridgeport, Bonn, assign
or, by memo assignments, to Bridgeport Ther
mostat Company, lino, Bridgeport, @onln, a cor
poration oi Delaware
Application dune 4i, i935, Serial No. tdddli
d @laims. (El. llllt-i-llll)
This invention relates to pumps provided with cylindrical portion it which is concentric with
sealing means for preventing the escape ol? liquid the socket 2t. Adjacent the annular portion lid,
from the pumping chamber around the driving the cylindrical portion it has a shoulder 32 and
shaft.
'
a reduced portion dd to receive a portioh oi the .
in the pumps now in use there is always di?i-e
culty with preventing water leakage around the
driving shaft. Especially is this true with water
pumps used for circulating water in ‘the cooling
system of automobiles. It is necessary to have
sealing member later to be described. The per» '5
tion it is bent at right angles to form arms it
which are substantially in the same plane as the
bottom of the socket it. At the outer ends oi’
the arms 36 are the vanes 38 bent at right angles
10 the pump shaft sealed or there will be a loss of
to the arms 36, the vanes it being substantially lo
cooling medium. Also in winter if the shaft is
not properly sealed, there is a loss of anti-freeze
in line with the axis of the socket it of the im
peller it. The arms it and the vanes‘ it are pro“
solution. ‘in the present devices packing glands
vided with ribs it which form reinforcing mem—
are used which become worn and which must be
bers for the arms and the vanes.
'15 replaced or tightened to prevent leakage.
An object of thlslnvention is to overcome the
defects and di?iculties present in the pumps now
in use and to provide a sealing means for liquid
pump ‘shafts which will prevent the escape of
20 liquid from the pump casing and which after it is
once installed does not need any adjustment or
repair for an indefinite period.
As before .
stated, the pump impeller is secured to the shaft '15
it by the pin 22, and as the shaft lt'rotates, the
‘impeller M will be rotated to cause pumping of
the liquid contained within the pump housing it.
In order to prevent the liquid from leaving the
pump housing ill and escaping therefrom around '20
shaft it I have provided the following construe
l
tion. - The pump housing it is provided with a
in the drawing:
Figure i represents a vertical, transverse cross
145 section of a pump and pump housing;
Figure 2 represents a view in elevation of the
pumping and sealing unit; and
li'igure 3 represents an elevation of the impeller.
Referring now to the drawing, the reference
'1.) character ill deslanatesa pump housing having a
?xed collar or annular projection tit adjacent the
hearing it. Between the collar or projection til
and the annular portion {it of the pumping im- ‘95
peller, is positioned a resilient extensible and
contractible member
provided with an annular
bearing member M which surrounds the shaft it
and bears against the collar or projection‘
As
the extensible and contractihle member
ll '39
closure plate i2 secured to the pump housing so prefer to use a flexible metallic bellows which
as. to form a water?tight joint. The plate may functions as abellows seal for the shaft it. This
be secured to the housing by the bolts it or in resilient and ?exible member fit at its one end
any suitable manner. A gasket or packing it is is provided with a flange portion M which is spun
:2‘- provided between the plate l2 and the housing ill. over the flange 52 on the annular hearing mem- 3s
This'housing may iorm part‘ or an engine for an her at 5i to secure the bellows member lit to the
automobile. or may be made separate and at- bearing member lid, ?re other end of resilient
tached to the engine. Rotatablymounted in and member to has a ?ange or sleeve portion lid
extending into the pump housing ill is a shaft it which ?ts the reduced portion 34 of the cylin
to which may be rotated in the usual manner by a drical portion at of the‘ impeller, The ?ange l0
pulley 5'5 m‘ which may be rct?ted by the engine or sleeve portion 55 is soldered or otherwisese
by means of‘ a belt; ‘gearing or m any suitable curely attached and sealed to the impeller in this
manner.
The hearing
it is provided for the
way?
shaft it.
It is to be noted that the shaft 16 does
45 not extend through the closure plate l2.
'
Secured tothe end 20 of the shaft I6 by means
As sho
.
of the pin 22 is a pump impeller at
.
.ln the drawing, the impeller is formed from a
Single piece of metal_
>
-
*
4
a be ’
e f me_
Theorbearing
member bearing
a m y material.
mad 0 I! the 45
tall-ic
of. non-metallic
.
.
-
.
l
bearing material is metal, the resilient member
46 is soldered or otherwise secured thereto and
‘
The impeller 24 15 pm_
the ?ange 50 then spun over as at 54. If the
so vided with the c‘osed socket 25 into which the
bearing member ‘a is °f ‘mu-metallic material'
end an of the shaft ls ?ts, Extending from and
the bellows member or resilient member 46 is
formed integrally with the socket 26 is the annular portion 2a which is bent at right angles to
‘ the socket 26. Beyondpthe annular portion 28
cemented thereto and the ?ange 50 then spun
over as at 54- For a non-metallic bearing ma
terial I may use moulded material similar to
756 the pump impeller is bent back to form the
Bakelite. when such material is used. I employ “
2
2,118,681
cement to attach ~the ?ange III of the ?exible
sealing member 40 to the bearing member 48.
Positioned within the resilient and ?exible seal
ing member 46 is a spring 58, one end of which
bears against the annular portion 20 of the pump
ing impeller and the other end of which bears
against the annular bearing member 48. This
spring it functions to expand the ?exible seal
ing member 48 and.to keep the bearing member
4| ~in sealing engagement with the collar 44 of
the pump housing and to prevent the leakage of
any liquid from the pumping chamber past the
shaft I‘. The spring is of sufficient strength to
keep the parts sealed. while I have shown the
spring 56 as a coil spring, I may substitute other
and ?exible corrugated sealing member provided
with a ?ange at one end ?xedly secured to said
annular portion of said impeller, an annular
bearing member secured to the other end of said
resilient and corrugated sealing member, and a
spring within said resilient and ?exible corru
gated member bearing against said impeller and
said annular bearing member, said impeller, seal
ing member, bearing member and spring consti
tuting a unitary replacement unit for use in a 10
pump adapted to be unitarily mounted upon or
removed from a pump shaft.
‘
3. An impeller made of sheet metal and shaped
to include a closed ended socket having an open
mouth adapted to receive the end of a shaft, an 15
annular ?ange portion at said mouth extending
at right angles to the circumferential wall of said
that the pump and sealing member are a unit socket and connected therewith, a cylindrical por
tion concentric with said socket and connected
which may be sold as such.
From the above description it is believed that with the annular ?ange, a radially extending por 20
the operation of the device will be obvious but tion carrying impeller vanes and connected to
the operation will be brie?y given. The shaft i6 said cylindrical portion, a ?exible metallic cor
is rotated by the pulley H, or gearing or the like. rugated sealing member having an annular ?ange
Because the shaft I6 is connected to the pumping at one end thereof soldered to said cylindrical
impeller 24 by the pin 22, rotation of the shaft portion, an annular bearing member mounted at
It will cause rotation of the pumping impeller. the opposite end of said sealing member, and a
The resilient and ?exible sealing member 46 is spring mounted in said sealing member whose
?xedly attached to the pumping impeller at 34 opposite ends bear respectively against said an
and 85 and also to the annular bearing member nular ?ange portion of said impeller and said
44 at ill and I4'so that rotation of the impeller annular bearing member, said impeller, sealing 30
24 will also cause rotation of the resilient and member, bearing member and spring constituting
?exible sealing member 48, the bearing member a unitary replacement unit for pumps adapted
48 and the spring I‘. Rotation of the impeller to be removably mounted on a pump shaft.
will cause pumping of the liquid in the pumping
4. An impeller made of sheet metal and shaped
forms of springs therefor.
From an inspection of Fig. 2 it will be apparent
chamber but due to the sealing arrangement, no , to provide a closed socket adapted to receive an 35
end of a shaft, an annular ?ange portion extend
In view of the above description it will be seen ing at right angles to the circumferential wall of
that I have set forth an extremely simple and said socket and connected therewith, a second
effective pump sealing structure which will last bent-back portion extending at right angles to
indefinitely.
,
said ?rst-named annular ?ange portion concen 40
What I claim is:
tric with said circumferential wall and connected
1. An impeller made of sheet metal and shaped to the annular ?ange portion, a radially extend
to include a closed ended socket having an open - ing portion carrying impeller vanes and connected
mouth adapted to receive the end of a shaft, an with said bent-back portion, a resilient and ?exi
annular ?ange portion at said mouth extending ble corrugated sealing member having an annular 45
at right angles to the circumferential wall of said ?ange at one end fixedly secured to said bent
socket, a cylindrical portion concentric with said back portion of said impeller, an annular bearing
socket and connected with the annular ?ange a member secured to the other end of said resilient
portion, and a radially extending portion carrying and ?exible corrugated sealing member, and a
impeller vanes and connected to said cylindrical spring within said ?exible corrugated sealing
portion.
,
member whose opposite ends bear respectively
against the inner face of said annular bearing
2. An impeller made of sheet metal and pro
vided with a closed shaft receiving socket and member and said annular ?ange portion of said
having an annular bent-back portion concentric impeller, said impeller, sealing member, bearing
with said socket and connected with the same. member and spring constituting a unitary re
said impeller being also provided with a radially placement unit for pumps adapted to be remov
liquid will escape past the shaft it.
extending portion carrying impeller vanes and
connected with said annular portion, a resilient
ably mounted on a pump shaft.
WILLIAM F. MACDONALD.
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