Title of Invention

A PUMPING STATION WITH A LIQUID CONDUCTING DEVICE.

Abstract This invention relates to a pumping station with a liquid conducting device, comprising a structure (1) having at least one inlet chamber (2) and at least one discharge chamber (3) for a liquid which is to be conveyed, said discharge chamber (3) being arranged at a different height from said inlet chamber (2), a separating wall (4) within the structure (1) between the inlet and discharge chambers (2,3), and at least one pump (5) for delivering a liquid through the separating wall (4) into the discharge chamber (3), the discharge chamber (3) having a discharge opening (12) which is arranged at an angle to an open outlet opening (15) of the pump (5), the discharge opening (12) having an upper edge (13) situated below a liquid level which prevails in a discharge (11) arranged downstream of the structure (1), wherein the pump (5) is provided with an upwardly directed, liquid-conducting device (9) leading to the pump outlet opening (10), and the outlet opening (10) is arranged in the discharge chamber (3) above the upper edge (13) of the discharge opening (12).
Full Text Description
The invention relates to a pumping station comprising a
building which has at least one inflow chamber and at
least one outflow chamber which is arranged at a
different height, a partition within the structure
being arranged between these at least two chambers, at
least one pump delivering a fluid through a partition
of this type into an outflow chamber of the structure,
the outflow chamber having an outflow opening which is
arranged at an angle to an outlet opening, in which
case the upper edge of the said outflow opening is
situated below a liquid level which prevails in an
outflow arranged downstream of the structure.
Pumping stations, which are also known as water scoop
mechanisms, dyke or discharging scoop mechanisms, water
raising mechanisms, irrigation pumping mechanisms or
under similar terms, have to deliver large amounts of
water with small delivery heads. A general overview of
systems of this type is disclosed by the essay entitled
"Gestaltung von Schöpfwerken [Design of water scoop
mechanisms]", by Helmut Göhrke and Paul Winkelmann,
published in KSB Technical Reports No. 11, August 1966,
pages 28-36. With changing levels on the inflow side
and with fluctuations in the external water levels
arranged downstream of the pumping station, pumping
stations have to cope with different delivery heads.
Since the pumps which are in use, which are essentially
of axial or semiaxial design, discharge only relatively
small delivery heads, the slight fluctuations in the
delivery head, which fluctuations are required for
efficient operation of the system, are a problem for
the design of a [sic] pumping stations of this type.

In order to keep the costs of a structure of this type
low, vertical propeller pumps are predominantly used.
For small delivery heads of up to approximately
2 metres the abovementioned essay has disclosed the use
of what is referred to as an open propeller pump. In
this case, a fluid which is to be delivered flows,
directly after having passed the impeller, out of the
pump housing, which is designed to be open on the
delivery side, into the outflow chamber of the pumping
station. As in the case of all pumping stations having
the abovementioned purpose of use, a back flow
preventer has to be arranged on the delivery side of
the pump and is used, when the pump is switched off, to
prevent fluid which has already been delivered from
flowing back. For this purpose, in the case of the
pumping station which is already known, the discharge
opening of the outflow chamber is fitted with a
positively controlled non-return flap which serves
simultaneously as back flow preventer and a shut-off
element, cf. page 31, Figure 3A.
The invention is based on the problem of developing a
pumping station which ensures reliable and
energy-efficient operation with a low outlay on
equipment and structure.
To achieve this object, provision is made for each pump
to be provided with a liquid-conducting device which
runs in a rising direction and has an outlet opening
which is arranged in the outflow chamber above the
upper edge of the outflow opening and is designed to be
open.
This solution means that an additional installation of
a shut-off flap can be dispensed with. And, the device
which conducts liquid in a rising direction can be a
pipe, channel, a tube or a similar formation designed
as part of the structure. The saving which is possible
as a result on a hitherto necessary shut-off flap

increases the operational reliability considerably with
a simultaneous reduction in the investment costs. This
is because shut-off flaps of this type constitute a
maintenance-intensive and fault-prone component as a
consequence of the control necessary for their
operation and the moving components which are
frequently underwater.
One refinement of the invention makes provision for the
upper edge of the outflow opening to be part of an
adjustable opening. Therefore, in the development of a
standardized structure for a pumping station,
adaptation of the structure to the respective maximum
and minimum levels on the outflow side of the pumping
station can take place in a very simple manner by means
of a simple matching of the upper edge of the outflow
opening to the height of the outlet opening, which is
designed to be open, of the liquid-conducting device.
In the planning or production of the pumping station,
adaptation to the predetermined levels of the inflow
and outflow channels situated outside the structure can
take place by simply varying a framework defining the
upper edge of the outflow opening. The upper edge may
also be part of a height-adjustable device or of a
device which can be adjusted during operation.
Another refinement of the invention makes provision for
a delivery-flow measuring device to be arranged in the
liquid-conducting device and/or in the region of the
outflow opening. Also, according to a further
refinement of the invention, an outflow channel, a pipe
or the like, running predominantly horizontally and
having a delivery-flow measuring device arranged in it
can be arranged downstream of the outflow opening. A
delivery-flow measuring device of this type enables
monitoring to an extent even including remote diagnosis
or remote maintenance of a pumping station in a very
simple manner. With the aid of a delivery-flow signal
which can be transmitted in various known ways, it can

be ascertained whether the pumping station is operating
correctly.
In order to reduce the outlay on measurement technology
during measurement of a delivery flow, provision is
made for a cross section which is used for measurinq
the delivery flow and through which the flow passes or
a volume region through which the flow passes to be
completely filled with the delivery fluid. For this
purpose, a highest point of a measured-value detection
region of this type, which is generally arranged in
part of the flow path on the delivery side, lies below
the lowest water level on the outflow side. The
continuous and complete filling of a measuring section
of this type can take place by means of its local lower
positioning or by means of an overflow threshold
arranged at the end thereof. The cross section which is
used for the measuring and through which the flow
passes should always be below the lowest level on the
outflow side on which a design of a pumping station of
this type is based. The arrangement of a type of
overflow threshold at the end of a measured section of
this type enables the structural outlay in the case of
excavation works to be reduced. Fluctuations in the
height on the outflow side are therefore unable to have
an -effect on the level in the measured section. The
same effect can be achieved with a measured section on
the outflow side, which is designed in the manner of a
drain. Section guidance of this type, which makes use
of the principle of communicating tubes, ensures
complete filling of liquid in the pipe, the tube, the
channel or the like which is used for measuring the
delivery flow.
According to another refinement of the invention, a
pump is fitted with fixed and/or adjustable running
and/or conducting devices. The use of adjusting devices
of this type is dependent on the operating conditions
which are used for the pumping station: Although the

use of pump designs of this type in a pumping station
increases the investment costs, they bring about an
improvement in the efficiency compared to what are
referred to as rigid, i.e. nonadjustable pumps. This
also brings about a considerable reduction in the power
costs, as a result of which a system of this type can
be operated more cost-effectively, as considered over a
prolonged operating period. The saving on the costs of
energy reduces the costs of the lifecycle of the system
for the operator.
According to another refinement of the invention, the
device conducting the liquid in a rising direction runs
vertically or inclined, in which case the outlet
opening is arranged parallel or inclined with respect
to the liquid level. If the spatial constructions of
the outflow chamber require a different arrangement or
position of the outlet opening for flow engineering
and/or location-specific reasons, then the surface of
the outlet opening can also run at an angle and/or
inclined with respect to the horizontal. In this case,
as in the case of an outlet opening running
horizontally, it merely has to be ensured that a
lowermost edge of the outlet opening is always situated
above the highest liquid level taken as a basis on the
outflow side in the planning of the pumping station.
When a pump is switched off, this measure prevents
fluid which has already been delivered from flowing
back into the inflow chamber via the outlet opening and
through the pump.
The outlet opening, or the lowest edge thereof, is
always situated, even if only slightly, above the
maximum liquid level which occurs. This also gives rise
to a further substantial advantage in that the siphon
effect, which is known per se, can be used for a
pumping station of this type. The construction of the
pumping station in terms of structure can therefore be
directly designed as a siphon without the hitherto

known, special siphon pipes additionally having to be
installed. In this case, the outlet opening of the
liquid-conducting device which is arranged downstream
of a pump forms the lower apex of the siphon. The
design of the discharge chamber as a siphon is directly
associated with the energy-saving potential of the
pumping station through recovery of the geodetic
difference in height between the lower apex of the
siphon and the level on the outflow side. This is
ensured by the position of the upper edge of the
outflow opening at the height of the lowest level on
the outflow side.
When the pump is switched off the outflow chamber of
the pumping station is ventilated with the aid of a
valve causing the siphon effect to be cancelled.
Leak-proof construction of the outflow chamber is
possible without problem during erection of the
structure, since the latter can be designed in a cost-
effective manner as a concrete construction. In order
to improve the sealing effect in the outflow chamber,
coatings which provide a seal in an appropriate manner
can be applied in a simple manner to the wall surfaces
of the said outflow chamber. Such a construction of the
pumping station enables the hitherto used, long siphon
pipes to be dispensed with. On account of the low
reflux quantities in this solution, the outlay on
securing measures on the pump side against back flows
can be entirely omitted or, under some circumstances,
retained at just a low level.
In order to enable starting up even in special cases
with an increased power consumption in the partial-load
region of the pump, a vacuum system for eliminating air
from the outflow chamber may additionally be provided.
The said vacuum system would then operate only during
the starting-up process of the pump. Depending on the
design of the pumping station and the operating
conditions thereof it would have to be decided whether

preference is given, for example, to a more powerful
drive motor for the pump or to a vacuum system.
In this respect, a further refinement of the invention
makes provision for a drive unit of a pump of a design
without a shaft seal to be arranged above the outflow
chamber. The drive unit, for example an electric motor
or internal combustion engine, with or without a gear
mechanism connected in between, is arranged here at a
height which lies above the highest level which occurs
with respect to the pumping station. The outflow
chamber would be connected here to the surroundings.
The dynamic pressure components of the flow which exist
in the liquid-conducting device and are produced by the
pump are not sufficient to bridge the height and reach
as far as the drive unit.
In the case of an outflow chamber which is sealed and
forms part of a siphon, sealing with respect to a drive
unit which is mounted outside the outflow chamber is
undertaken with known means. In pump designs where a
drive is set up to be dry, a drive shaft has to be
introduced into the outflow chamber. In this case, a
dynamically acting shaft seal can be saved on by means
of a shaft protective tube which is connected in a
static and leakproof manner to the outflow chamber and
surrounds a drive shaft. The said tube projects with
one open end into the outflow chamber and its length is
selected in such a manner that a backing-up pressure is
formed therein on account of the flowing delivery
fluid. This backing-up pressure prevents, in
association with the rise in pressure caused by the
flow losses in the outflow chamber, which is connected
downstream of the outlet opening, and outflow devices
connected in turn downstream of the said outflow
chamber, air from entering from the surroundings into
the outflow chamber and into the liquid-conducting
device prevents [sic] . A shaft seal for the pump shaft
can therefore be saved on, since a liquid level arises

in the shaft protective tube and because of said liquid
level air would not be abie to enter the outflow
chamber from the outside and have an adverse effect on
its siphon effect. In those cases in which distenable
hydraulic equipment is used, the shaft protective tube
can also be used for suspending the hydraulic unit from
the pump.
Also, in order to prevent the delivered fluid from
flowing back when the pump is switched off, the outflow
chamber can be provided with a ventilating means. A
valve which is used for this purpose and is situated
with associated connecting pipes in that region of the
pumping station which is arranged such that it is dry
is easily accessible, is of small overall height, can
be actuated in a very simple manner and, when required,
interrupts the siphon effect.
Exemplary embodiments of the invention are illustrated
in the drawings and are described in greater detail

below. In theaccompanying drawings
Fig. 1 shows a pumping station of a simple design,
Figs 2 and 3 show pumping stations having an integrated
measurement channel,
Fig. 4 shows a pumping station having an obliquely
arranged pump, and
Fig. 5 shows a pumping station having a horizontally
arranged pump.
Fig. 1 shows a pumping station 1 which has an inflow
chamber 2 and an outflow chamber 3. Within the inflow
chamber 2, which can be designed to be open or covered
and in which a fluid which is to be delivered flows in
from an external source, two levels of the liquid to be
delivered are shown. LLWLin stands here for the lowest

low water level and HHWLin stands here for the highest
high water level which can occur on the inflow side of
this pumping station 1.
A partition 4 through which a pump 5 extends in a
vertical arrangement is arranged on the upper side of
the inflow chamber 2. One or more impellers - not
illustrated here - are arranged in the lower part of
the pump 5. A drive unit 6 arranged above the pump 5
brings about the drive of the pump 5. The transmission
of power between the drive unit 6 and pump 5 takes
place by means of a shaft 7. The drive unit 6 rests by
customary fastening means on the cover 8 of the outflow
chamber 3. In the example shown, the drive unit 6 is
fastened on the cover 8 in an air-tight manner, so that
the outflow chamber 3 itself exerts a siphon effect.
The housing of the vertically arranged pump 5 is
designed as a liquid-conducting device 9 which has an
outlet opening 10 which is designed to be open and
extends parallel to the liquid level. The outlet
opening 10 lies at a height which is at least level
with or lies above the highest high water level HHWLout
on the side of the pumping station 1 having the outflow
11. The liquid-conducting device 9, which is designed
here as a rising tube, opens with the open tube end or
the outlet opening 10 into the closed outflow chamber
3, which is designed to be liquid-tight with respect to
the inflow chamber 2. The outflow chamber 3 has an
outflow opening 12 through which a connection is
produced with the outflow 11 which is arranged
downstream of the pumping station 1. Two levels are
likewise shown in the outflow 11. The level LLWLout
marks the lowest low water level here and the level
HHWLout marks the highest attainable level on the
outflow side.
The upper edge 13 of the outflow opening 12 from the
outflow chamber 3 lies here at maximum at the level of

the lowest level LLWLout. The outlet opening 10 of the
liquid-conducting device 9 is situated at least at the
height of the highest high water level HHWLout on the
outflow side 11. The pump 5 therefore only has to
produce at most the same delivery power as is necessary
at the simultaneously lowest LLWLin in the inflow
chamber in order to achieve the highest water level
HHWLout.
The upper edge 13 of the outflow opening 12 is part of
an adjustable opening. Adaptation of the structure to
the respective maximum and minimum levels HHWLout and
LLWLout on the outflow side 11 of the pumping station 1
takes place in a very simple manner by simple matching
of the upper edge 13 of the outflow opening 12 to the
height of the outlet opening 10, which is designed to
be open, of the liquid-conducting device 9. Adaptation
to the predetermined levels of the inflow and outflow
channels situated outside the structure takes place by
simply varying the upper edge. The upper edge is
illustrated here as part of a height-adjustable device.
It can be fastened tightly in the outflow chamber by
means of customary fastening means. In the event of
sharply fluctuating levels on the side having the
outflow 11, it is a matter of calculation as to
whether, for reasons of energy saving, the upper edge
13 is designed as a device which can be adjusted during
operation.
Sensors 14 of flow-measuring instruments can be
arranged within the liquid-conducting device 9, in the
region of the outflow opening 12 or in the outflow 11.
In order, when the pump 5 is switched off, to prevent a
backflow of the delivery fluid from the side having the
outflow 11, the outflow chamber 3 has a ventilating
means 15. This consists here of piping having a
ventilation valve arranged on it. If a ventilation
valve of this type is opened, then the frictional

engagement of a returning column of liquid is
interrupted in the outflow chamber 3, which, is designed
as a siphon, by the introduction of air.
Fig. 2 shows a pumping station 1 in which a measuring
channel 16 is arranged downstream on [sic] the outflow
opening 12 of the outflow chamber 3. In this measuring
channel 16, the highest point is situated at maximum at
the level of the lowest low water level LLWLout. The
complete filling of the measuring channel 16 with
liquid is therefore ensured, as a result of which
simple delivery-flow measuring instruments, for example
ultrasound sensors 14, can be used for measuring the
delivery flow. Air locks which falsify a measurement
are avoided as a result. In order to ensure the
continuous filling of the measuring channel, an
overflow threshold 17 can be arranged in the outflow 11
of the pumping station 1. The height 17.1 of the said
overflow threshold is dimensioned in such a manner that
a minimum water level LLWLout in the measuring channel
16 remains ensured in all operating states. In
principle, a measuring channel 16 designed in such a
manner is formed as a drain. The pumping station shown
in Fig. 2 to such an extent illustrates a combination
of pump with siphon arranged downstream and drain
arranged downstream of the siphon.
Since, in this exemplary embodiment of a pumping
station of this type, the outflow chamber 3 is of
smaller design, preference would be given, on account
of the structural circumstances, to a rising tube 9
having an obliquely running outlet opening 10. The
lower edge 18 of the open outlet opening 10 always runs
level with or slightly above the highest high water
level HHWLout on the side having the outflow 11.
In Fig. 3, the liquid-conducting device 9 is designed
as a direct part of the structure of the pumping
station 1 where it is part of the concrete

construction. Lowered into it is a pump 5 which is
designed as a submersible motor-driven pump and whose
drive motor has the fluid being delivered washing
around it. A design of this type can be fitted very
easily and can easily be lifted out for possible
maintenance purposes. The driving energy required is
introduced by electric supply cables 20. The principle
of operation is the same as for the embodiment of
Fig. 1. In addition, a vacuum system 21 for eliminating
air from the outflow chamber 3 is provided. It enables
the pumping station 1 to be started up, in special
cases, and can open into the installation opening 8.1,
be combined with the ventilating means 15 or arranged
in another manner.
For maintenance work in the region of the inflow and
outflow 2, 11 and in the region of the pump 5 having
the associated drive unit 6, there are also used, in
the illustrated exemplary embodiments of the pumping
stations, hoists with which work of this type is
facilitated. The inflow chamber 2 is designed here so
that it is partially covered, since it has a covered
inflow compartment 2.1 from which the pump 5 draws in
its intake. At low levels, the formation of
disadvantageous, air-trapping eddies are therefore
avoided.
Fig. 4 shows an embodiment of a pumping station 1
having an obliquely arranged pump 5. In order to
realize a saving on costs for the structure of the
pumping station, a submersible motor-pump unit is
fitted into the obliquely running, liquid-conducting
device 9. Pumps 5 of this type, which are also known as
submersible motor-driven pumps, have a continuously
submerged and very low-maintenance motor. The outlet
opening 10 of the liquid-conducting device 9 can - as
shown - run obliquely with respect to the levels
present in the pumping station. The oblique position
selected is dependent on the local circumstances at the

installation site. Situated in the cover 8 of the
outflow chamber 3 is an installation opening 8.1, which
can be closed in an air-tight manner, for the
installation, inspection and the like of the pump
arranged lowered into the - inflow chamber 2. Even in
such a design of a pumping station 1, a delivery-flow
measuring device having associated sensors 14 can be
used in a measuring channel 16.
The liquid-conducting device 9 has, in the region of
the pump 5 which is lowered into it, a round cross
section which merges into an angular cross section in
the direction of outlet opening 10. In the case of
those structural components which are formed as a
concrete construction, the angular cross sections which
are used reduce the production costs and lower the
operating costs of the pumping station, since there is
the simple option as a result of using relatively large
cross-sectional surfaces through which the flow passes.
The lower edge 18 of the outlet opening 10 is arranged
at least at the level of the level HHLWout. Such a
design of a pumping station can be produced very
compactly and is accessible. A pump 5 can therefore be
lowered onto the installation site directly from a
motor vehicle delivering if. In this compact design of
a pumping station, the function of the partition 4 is
taken over by the liquid-conducting device 9.
Fig. 5 shows a pumping station 1 having a horizontally
arranged pump 5 and likewise in a compact design
similarly to Fig. 4. The pump 5 can be a single- or
multi-stage submerged motor-driven pump. The partition
4 between the inflow chamber 2 and outflow chamber 3 is
arranged vertically. The pump 5 delivers directly into

the upper edge 13 of the outflow opening 12 is arranged
at a relatively low height. The outlet opening 10 is
arranged here at least at the same height as the
highest attainable high water level HHWLout on the
outflow side 11. Therefore, only the pump delivery head
required for the particular level is necessary for
changing operating water levels (for example LLWL) in
the outflow channel.
In the schematic illustrations of the exemplary
embodiments of Figs 1 to 5, the transitions in the
structures between the different flow paths are
illustrated in a simplified manner having sharp-edge
transitions. In the case of systems implemented in
practice, the flow paths are, of course, optimized in
order to reduce the resistances. The cross sections of
the flow paths are of extremely large dimensions on
account of the design of the pumping station. The
transitions are designed in accordance with the flow
quantities flowing through them. In contrast to the
known designs, in which a siphon system is formed by
flow-conducting piping, the overall efficiency of a
pumping station 1 can be significantly increased by
measures of this type. Integrating a siphon in this
manner directly into the. structure of the pumping
station simplifies the design thereof to a quite
substantial extent.

WE CLAIM
1. A pumping station with a liquid conducting device, comprising a structure (1)
having at bast one inlet chamber (2) and at least one discharge chamber (3) for
a liquid which is to be conveyed, said discharge chamber (3) being arranged at a
different height from said inlet chamber (2), a separating wall (4) within the
structure (1) between the inlet and discharge chambers (2,3), and at least one
pump (5) for delivering a liquid through the separating wall (4) into the
discharge chamber (3), the discharge chamber (3) having a discharge opening
(12) which is arranged at an angle to an open outlet opening (15) of the pump
(5), said discharge opening (12) having an upper edge (13) situated below a
liquid level which prevails in a discharge (11) arranged downstream of the
structure (1), wherein the pump (5) is provided with an upwardly directed,
liquid-conducting device (9) leading to the pump outlet opening (10), and said
outlet opening (10) is arranged in the discharge chamber (3) above the upper
edge (13) of the discharge opening (12).
2. The pumping station as claimed in claim 1, wherein the liquid-conducting
device (9) is constructed as an upwardly directed pipe or a rising channel.
3. The pumping station as claimed in claim 1, wherein the upper edge (13) of
the discharge opening (12) is part of an adjustable opening, whereby the height
of said upper edge (13) can be varied.

4. The pumping station as claimed in claim 1, comprising a flow measuring
device (19) arranged in tht liquid-conducting device (9) or in the vicinity of the
discharge opening (12).
5. The pumping station as claimed in claim 4, wherein said discharge chamber
(3) communicates through said discharge opening (12) with a substantially
horizontal discharge channel (16), and the flow measuring device (14) is
arranged in said discharge channel (16) downstream of the discharge opening
(12).
6. The pumping station as claimed in claim 4, wherein the flow measuring device
(14) transmits a measured flow signal to a remote monitoring location for the
pumping station.
7. The pumping station as claimed in claim 4, wherein the flow measuring device
(14) is arranged in a cross-sectional area of the structure (1) through which the
conveyed liquid passes, and the structure (1) is configured so that said cross-
sectional area (12) is completely fitted with conveyed liquid.
8. The pumping station as claimed in claim 1, wherein the pump (5) is equipped
with fixed impeller vanes or guide vanes.

9. The pumping station as claimed in claim 1, wherein the pump (5) is equipped
with adjustable impeller vanes or guide vanes.
10. The pumping station as claimed in claim 1, wherein the open outlet (10) of
the liquid-conducting device (14) has a lowest edge (18) which is level with or
higher than a maximum liquid leval which arises in said discharge.
11. The pumping station as claimed in claim 10, wherein the liquid-conducting
device (9) extends vertically.
12. The pumping station as claimtd in claim 10, wherein the liquid-conducting
device (9) has an inclined orientation.
13. The pumping station as claimed in claim 1, wherein the discharge chamber
(3) is provided with a venting device.
14. The pumping station as claimed in claim 1, wherein said pump (5) is driven
by a drive unit (6) arranged in a dry location above the discharge chamber (3),
and the drive unit (6) is connected to the pump (5) by a shaft (7) which extends
through a seal-less shaft passage into the discharge chamber (3).

15. The pumping station as claimed in claim 1, comprising a vacuum means (21)
corrected to said discharga chamber (3) for drawing a vacuum in said discharge
chamber (3) to assist in startup of the pumping station.
16. The pumping station as claimed in claim 4, wherein the flow measuring
device (14) is disposed in a measuring channel (16) in the form of a sump
arranged downstream of the discharge chamber (3).
This invention relates to a pumping station with a liquid conducting device,
comprising a structure (1) having at least one inlet chamber (2) and at least one
discharge chamber (3) for a liquid which is to be conveyed, said discharge
chamber (3) being arranged at a different height from said inlet chamber (2), a
separating wall (4) within the structure (1) between the inlet and discharge
chambers (2,3), and at least one pump (5) for delivering a liquid through the
separating wall (4) into the discharge chamber (3), the discharge chamber (3)
having a discharge opening (12) which is arranged at an angle to an open outlet
opening (15) of the pump (5), the discharge opening (12) having an upper edge
(13) situated below a liquid level which prevails in a discharge (11) arranged
downstream of the structure (1), wherein the pump (5) is provided with an
upwardly directed, liquid-conducting device (9) leading to the pump outlet
opening (10), and the outlet opening (10) is arranged in the discharge chamber
(3) above the upper edge (13) of the discharge opening (12).

Documents:

IN-PCT-2002-1563-KOL-FORM 27.pdf

IN-PCT-2002-1563-KOL-FORM-27-1.pdf

IN-PCT-2002-1563-KOL-FORM-27.pdf

in-pct-2002-1563-kol-granted-abstract.pdf

in-pct-2002-1563-kol-granted-claims.pdf

in-pct-2002-1563-kol-granted-correspondence.pdf

in-pct-2002-1563-kol-granted-description (complete).pdf

in-pct-2002-1563-kol-granted-drawings.pdf

in-pct-2002-1563-kol-granted-examination report.pdf

in-pct-2002-1563-kol-granted-form 1.pdf

in-pct-2002-1563-kol-granted-form 18.pdf

in-pct-2002-1563-kol-granted-form 2.pdf

in-pct-2002-1563-kol-granted-form 3.pdf

in-pct-2002-1563-kol-granted-form 5.pdf

in-pct-2002-1563-kol-granted-pa.pdf

in-pct-2002-1563-kol-granted-priority document.pdf

in-pct-2002-1563-kol-granted-reply to examination report.pdf

in-pct-2002-1563-kol-granted-specification.pdf

in-pct-2002-1563-kol-granted-translated copy of priority document.pdf


Patent Number 225481
Indian Patent Application Number IN/PCT/2002/1563/KOL
PG Journal Number 46/2008
Publication Date 14-Nov-2008
Grant Date 12-Nov-2008
Date of Filing 23-Dec-2002
Name of Patentee KSB AKTIENGESELLSCHAFT
Applicant Address JOHANN-KLEIN-STRASSE 9, 67227 FRANKENTHAL
Inventors:
# Inventor's Name Inventor's Address
1 HOHN WOLFGANG WEISENHEIMER STRASSE 8A, 66745 LAMBSHEIM
2 KNOPFEL, HANS-DIETER LUDWIGSHAFENER STRASSE 21C, 67227 FRANKENTHAL
3 MEYER, GERHARD HAYDNSTRASSE 6C, 67227 FRANKENTHAL
4 ROSELER, WOLFGANG SACHSENSTRASSE 20, 68309 MANNHEIM
5 ROSENBERGER, HARTMUT MUSSBACHER LANDSTRASSE 11, 67433 NEUTSTADT/WEINSTRASSE
PCT International Classification Number E03F 5/22
PCT International Application Number PCT/EP01/07923
PCT International Filing date 2001-07-10
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 100 34 174.8 2000-07-14 Germany