U.S. patent application number 12/231218 was filed with the patent office on 2009-01-08 for diaphragm pumping device.
This patent application is currently assigned to Jackey CHIOU. Invention is credited to Ming Yang Wang.
Application Number | 20090010778 12/231218 |
Document ID | / |
Family ID | 40221574 |
Filed Date | 2009-01-08 |
United States Patent
Application |
20090010778 |
Kind Code |
A1 |
Wang; Ming Yang |
January 8, 2009 |
Diaphragm pumping device
Abstract
A diaphragm pumping device includes a housing having a partition
to form an upper chamber and a lower chamber, an inlet port for
receiving a fluid, and an outlet port, a bladder attached to the
housing and having a compartment communicating with the chambers of
the housing, two check valves disposed between the bladder and the
chambers of the housing, and an electro-magnetic device actuates
the arm to depress and to expand the bladder in order to draw the
fluid form the inlet port of the housing toward the outlet port of
the housing, the outlet port is communicating with the lower
chamber of the housing for allowing the fluid to be completely
pumped out of the lower chamber of the housing.
Inventors: |
Wang; Ming Yang; (Nantou,
TW) |
Correspondence
Address: |
CHARLES E. BAXLEY, ESQUIRE
90 JOHN STREET, SUITE 309
NEW YORK
NY
10038
US
|
Assignee: |
Jackey CHIOU
|
Family ID: |
40221574 |
Appl. No.: |
12/231218 |
Filed: |
August 29, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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11378942 |
Mar 17, 2006 |
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12231218 |
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Current U.S.
Class: |
417/413.1 |
Current CPC
Class: |
F04B 45/022 20130101;
F04B 43/04 20130101; F04B 45/027 20130101; F04B 43/026 20130101;
F04B 43/084 20130101 |
Class at
Publication: |
417/413.1 |
International
Class: |
F04B 43/04 20060101
F04B043/04; F04B 43/073 20060101 F04B043/073 |
Claims
1. A diaphragm pumping device comprising: a housing including a
partition provided therein to separate an inner portion of said
housing into an upper chamber and a lower chamber, said housing
including an inlet port provided thereon and communicating with
said upper chamber thereof for receiving a fluid, and including an
outlet port provided thereon and communicating with said lower
chamber thereof, a bladder attached to said housing and including a
compartment formed therein and communicating with said upper
chamber and said lower chamber of said housing, a first check valve
attached to said housing and disposed between said bladder and said
upper chamber of said housing and arranged to allow the fluid to
flow from said upper chamber of said housing into said bladder only
and to prevent the fluid from flowing backward from said bladder
into said upper chamber of said housing, a second check valve
attached to said housing and disposed between said bladder and said
lower chamber of said housing and arranged to allow the fluid to
flow from said bladder into said lower chamber of said housing only
and to prevent the fluid from flowing backward from said lower
chamber of said housing into said bladder, an arm attached to said
bladder, a magnetic member attached to said arm, and an
electro-magnetic device to actuate said magnetic member and to
operate said arm to depress and to expand said bladder in order to
draw the fluid form said inlet port of said housing toward said
outlet port of said housing.
2. The diaphragm pumping device as claimed in claim 1, wherein said
housing includes an orifice and an aperture formed therein and
communicating with said upper and said lower chambers of said
housing respectively, said first and said second check valves each
includes a shank extended therefrom for engaging through said
housing, and each includes a ratchet catch provided on said shank
for engaging with said housing to anchor and secure said first and
said second check valves to said housing, and each includes a blade
provided on said shank for engaging with said housing and for
selectively blocking said orifice and said aperture of said housing
respectively.
3. The diaphragm pumping device as claimed in claim 1, wherein said
housing includes a retainer provided thereon, and said arm includes
a first end pivotally coupled to said retainer of said housing, and
a second end having said magnetic member attached thereto.
4. The diaphragm pumping device as claimed in claim 3, wherein said
housing includes a dovetail slot formed therein, and said retainer
includes a dovetail member slidably engaged in said dovetail slot
of said housing.
5. The diaphragm pumping device as claimed in claim 4, wherein said
housing includes a stop slidably engaged with said dovetail slot of
said housing and engaged with said retainer for anchoring said
retainer to said housing.
6. The diaphragm pumping device as claimed in claim 4, wherein said
housing includes at least one catch extended therefrom and located
beside said dovetail slot of said housing member and said retainer
for engaging with said arm and for anchoring said arm to said
housing.
7. The diaphragm pumping device as claimed in claim 3, wherein said
arm includes a pivot pin attached to said first end of said arm and
engaged with said retainer.
8. The diaphragm pumping device as claimed in claim 1 further
comprising an outer receptacle including a base member to support
said housing and said electro-magnetic device.
9. The diaphragm pumping device as claimed in claim 8, wherein said
outer receptacle includes at least one cushioning member to cushion
said housing and said electro-magnetic device.
Description
[0001] The present invention is a continuation-in-part of U.S.
patent application Ser. No. 11/378,942, filed 17 Mar. 2006,
pending.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a diaphragm pumping device,
and more particularly to a diaphragm pumping device for vacuuming
or air pumping purposes and for allowing the fluid to be
effectively pumped.
[0004] 2. Description of the Prior Art
[0005] Typical air pumping devices or air compressors comprise a
piston slidably received and engaged in a cylinder housing, and a
motor driving device coupled to a piston rod for moving or driving
the piston to move in reciprocating action within the cylinder
housing, in order to generate and to supply a pressurized air to
inflate various objects.
[0006] For example, U.S. Pat. No. 4,403,611 to Babbitt et al.
discloses one of the typical sinus evacuator apparatuses comprising
a housing including a vacuum producing compartment, a mucus
collecting compartment, a sterilizing compartment, and a storage
compartment, a suction pervious barrier separates the mucus
collecting compartment from the vacuum producing compartment, and a
motor having a driving axle connected with a rotatable propeller
which is effective to produce only a suction to draw through a
catheter.
[0007] However, the mucus may not be effectively collected with the
typical sinus evacuator apparatus.
[0008] U.S. Pat. No. 5,358,385 to Wang discloses a typical dual
diaphragm pump with adjustable discharge side pressure trip switch
comprising a dual piston device coupled to a motor driving device
via an eccentric transmission device for generating and supplying a
pressurized air to inflate various objects.
[0009] However, the movement and thus pumping operation of the disk
shaped suction disk is limited.
[0010] The present invention has arisen to mitigate and/or obviate
the afore-described disadvantages of the conventional diaphragm
pumping devices.
SUMMARY OF THE INVENTION
[0011] The primary objective of the present invention is to provide
a diaphragm pumping device for being actuated or operated by an
electric actuating device, and for fluid vacuuming or pumping
purposes or operations and for allowing the fluid to be effectively
pumped.
[0012] In accordance with one aspect of the invention, there is
provided a diaphragm pumping device comprising a housing including
a partition provided therein to separate an inner portion of the
housing into an upper chamber and a lower chamber, the housing
including an inlet port provided thereon and communicating with the
upper chamber thereof for receiving a fluid, and including an
outlet port provided thereon and communicating with the lower
chamber thereof, a bladder attached to the housing and including a
compartment formed therein and communicating with the upper chamber
and the lower chamber of the housing, a first check valve attached
to the housing and disposed between the bladder and the upper
chamber of the housing and arranged to allow the fluid to flow from
the upper chamber of the housing into the bladder only and to
prevent the fluid from flowing backward from the bladder into the
upper chamber of the housing, a second check valve attached to the
housing and disposed between the bladder and the lower chamber of
the housing and arranged to allow the fluid to flow from the
bladder into the lower chamber of the housing only and to prevent
the fluid from flowing backward from the lower chamber of the
housing into the bladder, an arm attached to the bladder, a
magnetic member attached to the arm, and an electro-magnetic device
to actuate the magnetic member and to operate the arm to depress
and to expand the bladder in order to draw the fluid form the inlet
port of the housing toward the outlet port of the housing.
[0013] The housing includes an orifice and an aperture formed
therein and communicating with the upper and the lower chambers of
the housing respectively, the first and the second check valves
each includes a shank extended therefrom for engaging through the
housing, and each includes a ratchet catch provided on the shank
for engaging with the housing to anchor and secure the first and
the second check valves to the housing, and each includes a blade
provided on the shank for engaging with the housing and for
selectively blocking the orifice and the aperture of the housing
respectively.
[0014] The housing includes a retainer provided thereon, and the
arm includes a first end pivotally coupled to the retainer of the
housing, and a second end having the magnetic member attached
thereto. The housing includes a dovetail slot formed therein, and
the retainer includes a dovetail member slidably engaged in the
dovetail slot of the housing.
[0015] The housing includes a stop slidably engaged with the
dovetail slot of the housing and engaged with the retainer for
anchoring the retainer to the housing. The housing includes at
least one catch extended therefrom and located beside the dovetail
slot of the housing member and the retainer for engaging with the
arm and for anchoring the arm to the housing. The arm includes a
pivot pin attached to the first end of the arm and engaged with the
retainer.
[0016] An outer receptacle is further provided and includes a base
member to support the housing and the electro-magnetic device. The
outer receptacle includes at least one cushioning member to cushion
the housing and the electro-magnetic device.
[0017] Further objectives and advantages of the present invention
will become apparent from a careful reading of the detailed
description provided hereinbelow, with appropriate reference to the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a partial perspective view of an air compressing
assembly having a diaphragm pumping device in accordance with the
present invention;
[0019] FIG. 2 is a partial exploded view of the air compressing
assembly;
[0020] FIG. 3 is another partial exploded view illustrating the
diaphragm pumping device of the air compressing assembly;
[0021] FIG. 4 is a cross sectional view of the diaphragm pumping
device, taken along lines 4-4 of FIG. 1;
[0022] FIG. 5 is another cross sectional view of the diaphragm
pumping device, taken along lines 5-5 of FIG. 1;
[0023] FIG. 6 is a further cross sectional view of the diaphragm
pumping device, taken along lines 6-6 of FIG. 1;
[0024] FIG. 7 is a still further cross sectional view similar to
FIG. 6, illustrating the other operation of the diaphragm pumping
device;
[0025] FIG. 8 is a partial perspective view illustrating other
arrangement of the diaphragm pumping device;
[0026] FIG. 9 is a partial exploded view of the diaphragm pumping
device as shown in FIG. 8;
[0027] FIGS. 10, 11, 12 are cross sectional views taken along lines
10-10, 11-11, 12-12 of FIG. 8 respectively;
[0028] FIG. 13 is a further cross sectional view similar to FIG.
12, illustrating the other operation of the diaphragm pumping
device as shown in FIGS. 8-12;
[0029] FIG. 14 is a further partial perspective view similar to
FIG. 8, illustrating further arrangements of the diaphragm pumping
device;
[0030] FIG. 15 is a partial exploded view of the diaphragm pumping
device as shown in FIG. 14; and
[0031] FIG. 16 is a still further partial exploded view of the
diaphragm pumping device as shown in FIGS. 14-15.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0032] Referring to the drawings, and initially to FIGS. 1 and 2,
an air compressing assembly 1 in accordance with the present
invention comprises an outer receptacle 10 including a base member
11 and an upper cover member (not shown) to be secured to the base
member 11 with latches or fasteners (not shown), or by welding
processes, and including a plug (not shown) for coupling to an
electric energy source and for receiving an electric energy to
energize the air compressing assembly 1. An electro-magnetic device
20 is attached or disposed on the base member 11 of the receptacle
10 for generating an electro-magnetic field or force to actuate or
operate the air compressing assembly 1.
[0033] The air compressing assembly 1 further includes one or more
(such as two) diaphragm pumping devices 3 disposed or supported on
the base member 11 of the receptacle 10 and attached or disposed
beside the electro-magnetic device 20 for being actuated or
operated by the electro-magnetic device 20, which will be discussed
hereinafter. It is preferable that the outer receptacle 10 includes
a number of pads or cushioning legs or members 12 disposed below
the outer receptacle 10 for cushioning the electro-magnetic device
20 and the diaphragm pumping devices 3 and for reducing a vibration
of the electro-magnetic device 20 and the diaphragm pumping devices
3 and the outer receptacle 10.
[0034] One example of the electro-magnetic device 20 and the
diaphragm pumping device 3 has been disclosed in the applicant's
prior U.S. Pat. No. 7,351,235 which may be taken as a reference for
the present invention. The other example of the electro-magnetic
device and the diaphragm pumping device has also been disclosed in
the co-pending U.S. patent application Ser. No. 11/378,942, filed
17 Mar. 2006, which may also be taken as a reference for the
present invention. The above-described electro-magnetic device 20
is not related to the present invention and will not be described
in further details. The diaphragm pumping devices 3 in accordance
with the present invention has been improved over the prior
developed diaphragm pumping devices.
[0035] Referring now to FIGS. 1-6, two diaphragm pumping devices 3
are disclosed and each include a housing 30 having such as two
housing members 31, 32 to be anchored or secured together with such
as a peripheral recess and peripheral protrusion engagement 33
(FIGS. 4-7), latches or fasteners (not shown), or the like for
solidly anchoring or securing the two housing members 31, 32
together. The two housing members 31, 32 may further be solidly
coupled and secured together with such as adhesive materials, or by
welding processes. The housing 30 includes a partition 34 provided
therein, such as extended from the housing members 31, 32 to
separate the inner portion of the housing 30 into two chambers 35,
36, such as an upper chamber 35 and a lower chamber 36, as best
shown in FIGS. 3-7.
[0036] The housing 30 further includes an inlet tube or port 37
provided thereon or extended therefrom, such as extended from one
of the housing members 32 and communicating with the upper chamber
35 thereof for receiving a fluid or liquid or air (FIG. 6) and for
allowing the fluid or liquid or air to selectively flow into the
upper chamber 35 of the housing 30. The housing 30 further includes
an outlet tube or port 38 provided thereon or extended therefrom,
such as extended from one of the housing members 32 and
communicating with the other or lower chamber 36 thereof for
allowing the fluid or liquid or air to selectively flow out of the
lower chamber 36 of the housing 30 (FIG. 7).
[0037] It is to be noted that the outlet port 38 is formed or
provided on the lower portion of the housing 30 such that the fluid
or liquid received in the lower chamber 36 of the housing 30 may be
effectively and completely forced to flow out of the lower chamber
36 of the housing 30. The inlet tubes or ports 37 of the two
housings 30 may be coupled to a coupler 21 with hoses 22 (FIG. 1)
for allowing the fluid or liquid or air to flow into the upper
chambers 35 of the housings 30 through the coupler 21, and the
outlet ports 38 of the two housings 30 may also be coupled to
another coupler 23 with hoses 24 for allowing the fluid or liquid
or air to selectively flow out of the lower chambers 36 of the
housings 30 through the other coupler 23.
[0038] As shown in FIG. 2, the receptacle 10 may further include a
number of cavities 14 formed in the base member 11 for receiving
the outlet ports 38 of the housings 30 and for anchoring or
positioning the housings 30 to the base member 11, and the housings
30 may further include one or more studs or pegs 39 extended
downwardly therefrom, such as extended downwardly from the other
housing member 31 (FIGS. 2, 3) for selectively engaging with the
cavities 14 of the receptacle 10 and for further anchoring or
positioning the housings 30 to the base member 11. The housings 30
may further be solidly coupled and secured to the base member 11
with such as adhesive materials, welding processes, latches or
fasteners (not shown), or the like.
[0039] As also shown in FIGS. 3-7, the housing 30 further includes
a peripheral wall or casing 40 protruded or extended from the
housing member 32 and having a space 41 formed in the casing 40,
and further includes one or more orifices 42 formed therein and
communicating with the upper chamber 35 of the housing 30 and the
space 41 of the casing 40 (FIGS. 4, 6-7), and further includes one
or more apertures 43 formed therein and communicating with the
lower chamber 36 of the housing 30 and the space 41 of the casing
40 (FIGS. 5-7), A bladder 50 is attached or secured onto the casing
40 of each of the housings 30 and includes a compartment 51 formed
therein (FIGS. 3-7) and communicating with the space 41 of the
casing 40.
[0040] The bladders 50 are deformable or compressible and
expandable to pump or force the air or water or fluid or liquid to
flow through the orifices 42 or the apertures 43 of the housing 30,
which will be discussed hereinafter. The housing 30 further
includes a hook or retainer 44 provided thereon, such as formed
integral with or extended from the housing member 32, or the
retainer 44 includes a dovetail member 45 slidably engaged in a
dovetail slot 46 of the housing member 32 or of the housing 30, and
a latch or stop 47 is also slidably engaged with the dovetail slot
46 of the housing member 32 and secured to the housing 30 and
engaged with the retainer 44 for stably or solidly anchoring or
securing the retainer 44 to the housing 30. The housing 30 further
includes one or more projections or catches 48 extended therefrom
and located close to or beside the dovetail slot 46 of the housing
member 32 and the retainer 44.
[0041] An arm 52 is further provided and attached or coupled to
each of the bladders 50 for depressing or compressing and expanding
the bladders 50 respectively. The arms 52 each includes a middle
portion attached or coupled to the bladders 50 respectively, and
one end 53 hooked or pivotally coupled to the housing 30 with the
retainers 44 (FIGS. 1-2, 4-5), for example, a roller or pivot pin
54 is attached to the one end 53 of each arm 52 for pivotally
engaging with the retainer 44 and for pivotally coupling the one
end 53 of each arm 52 to the housing member 32 of the housing 30,
and each includes a magnet or magnetic member 55 attached thereto,
such as attached to the other end 56 of the arm 52 for acting or
operating with the electro-magnetic device 20. The catches 48 may
be engaged with the one ends 53 of the arms 52 and/or the pivot
pins 54 for anchoring or securing the arms 52 and/or the pivot pins
54 to the housing 30.
[0042] As best shown in FIGS. 1 and 4-5, the electro-magnetic
device 20 is disposed and located close to or beside the magnetic
members 55 of the arms 52, for generating electro-magnetic field or
force to force or to move the magnetic members 55 toward each other
and/or away from each other (FIG. 5) in order to actuate the arms
52 to depress or compress and expand the bladders 50 respectively,
and thus to force the air or water or fluid or liquid to flow
between the compartments 51 of the bladders 50 and/or the spaces 41
of the casings 40 and the chambers 35, 36, of the housing 30, or to
pump the air or water or fluid or liquid to flow through the
coupler 21 and the inlet ports 37 and into the upper chamber 35 of
the housing 30, and/or to flow out of the lower chambers 36 of the
housings 30 through the outlet ports 38 of the housings 30 and the
other coupler 23.
[0043] Two check valves 60, 61 each includes a shank 62 extended
therefrom for engaging through the casing 40 respectively, and each
further includes a ratchet catch 63 provided on the shank 62, for
engaging with the casing 40 and for anchoring or securing the check
valves 60, 61 to the casing 40 and between the bladders 50 and the
chambers 35, 36, of the housing 30 and/or of the casings 40
respectively. Each of the check valves 60, 61 includes a resilient
blade 64 formed or provided on one end of the shank 62 for
selectively blocking or opening the orifices 42 or the apertures 43
of the housing 30 respectively in order to control the flowing of
the air or water or fluid or liquid between the compartments 51 of
the bladders 50 and/or the spaces 41 of the casings 40 and the
chambers 35, 36 of the housing 30.
[0044] For example, when the magnetic members 55 are forced or
moved toward each other or when the bladders 50 are expanded by the
arms 52, the check valves 60 may be opened by the bladders 50 (FIG.
4) to allow the air or water or fluid or liquid to be drawn form
the upper chamber 35 of the housing 30 into the space 41 of the
casing 40 and the compartment 51 of the bladder 50, and to allow
the air or water or fluid or liquid to be drawn through the coupler
21 and the inlet ports 37 of the housing 30 and then to be drawn
into the upper chamber 35 of the housing 30. At this moment, the
other check valve 61 will be forced to block the apertures 43 of
the housing 30 (FIG. 6) by the bladder 50 to prevent the fluid or
liquid from flowing backward form the lower chamber 36 of the
housing 30 toward the compartment 51 of the bladder 50, and thus to
allow the fluid or liquid to be drawn from the upper chamber 35 of
the housing 30 into the compartment 51 of the bladder 50 only.
[0045] On the contrary, as shown in FIG. 5, when the magnetic
members 55 are forced or moved away from each other by the
electro-magnetic device 20, the bladders 50 may be depressed or
compressed by the arms 52, and the other check valve 61 may be
opened by the bladder 50 to allow the fluid or liquid to be forced
to flow form the compartment 51 of the bladder 50 toward or into
the lower chamber 36 of the housing 30 and then to allow the fluid
or liquid to flow out of the housing 30 through the outlet ports 38
of the housing 30 or the other coupler 23. At this moment, the
check valve 60 will be forced to close the upper chamber 35 of the
housing 30 (FIG. 7) and to prevent the fluid or liquid from flowing
backward form the compartment 51 of the bladder 50 into the upper
chamber 35 of the housing 30.
[0046] In operation, the fluid or liquid may be drawn to flow into
the upper chamber 35 of the housing 30 through the inlet port 37 of
the housing 30 (FIGS. 4, 6), and then to flow form the upper
chamber 35 of the housing 30 into the compartment 51 of the bladder
50 when the bladders 50 are expanded in the configuration or
arrangement as shown in FIGS. 4, 6. The fluid or liquid may then be
forced to flow form the compartment 51 of the bladder 50 into the
lower chamber 36 of the housing 30 and then to flow out through the
outlet port 38 of the housing 30 when the bladders 50 are depressed
or compressed by the arm 52, such that the fluid or liquid may be
pumped to flow into the inlet port 37 of the housing 30 and then to
flow out of the inlet port 38 of the housing 30 by the bladders 50
step by step.
[0047] The arms 52 and the magnetic member 55 and the
electro-magnetic device 20 may thus be formed as an actuating means
or device for depressing or compressing or pumping the bladders 50
to draw the fluid or liquid or air into the upper chamber 35 of the
housing 30 through the inlet port 37 of the housing 30, and then to
force the fluid or liquid to flow into the other or lower chamber
36 of the housing 30, and then to force the fluid or liquid to flow
out through the outlet port 38 of the housing 30. The magnetic
member 55 and the electro-magnetic device 20 may thus be formed as
an operating means or device for actuating or operating the arms 52
to depress or compress or pump or to expand the bladders 50 and to
pump the fluid or liquid to flow into the inlet port 37 of the
housing 30 and to flow out through the outlet port 38 of the
housing 30.
[0048] As shown in FIGS. 3-5, the housing 30 may further include
one or more protrusions or projections 49 extended into each of the
chambers 35, 36 of the housing 30 for interfering the flowing of
the fluid or liquid and for generating an eddy current for the
fluid or liquid. Again, it is to be noted and emphasized that the
outlet port 38 is formed or provided on the lower portion of the
housing 30 such that the fluid or liquid received in the lower
chamber 36 of the housing 30 may be effectively and completely
forced to flow out of the lower chamber 36 of the housing 30 and to
flow out through the outlet port 38 of the housing 30.
[0049] Alternatively, as shown in FIGS. 8-13, the diaphragm pumping
device 301 may include two housing members 321 attached or secured
together and arranged to have the upper chambers 35 of the housing
members 321 communicated with each other, and also arranged to have
the lower chambers 36 of the housing members 321 communicated with
each other, and the bladders 50 are also attached to the casings 40
respectively and engaged with the arms 52 and arranged to have the
bladders 50 to be compressed by the arms 52 in order to pump the
fluid or liquid to flow into the inlet port 37 of the housing
members 321 and to flow out through the outlet port 38 of the
housing members 321. The retainer 441 may be solidly anchored or
secured to or formed integral with the housing 30.
[0050] Further alternatively, as shown in FIGS. 14-16, the
diaphragm pumping device 302 may also include two housing members
322 attached or secured together and arranged to have the upper
chambers 35 of the housing members 322 communicated with each
other, and also arranged to have the lower chambers 36 of the
housing members 322 communicated with each other, and the bladders
50 are also attached to the casings 40 respectively and engaged
with the arms 52 and arranged to have the bladders 50 to be
compressed by the arms 52 in order to pump the fluid or liquid to
flow into the inlet port 37 of the housing members 322 and to flow
out through the outlet port 38 of the housing members 322. The
retainer 44 may also include a dovetail member 45 slidably engaged
in the dovetail slot 46 of the housing members 322, and a latch or
stop 47 is also slidably engaged with the dovetail slot 46 of the
housing member 322 and engaged with the retainer 44 for stably or
solidly anchoring or securing the retainer 44 to the housing
30.
[0051] Accordingly, the diaphragm pumping device in accordance with
the present invention may be actuated or operated by an electric
actuating device, and may be used for vacuuming or air pumping
purposes and for allowing the fluid to be effectively pumped.
[0052] Although this invention has been described with a certain
degree of particularity, it is to be understood that the present
disclosure has been made by way of example only and that numerous
changes in the detailed construction and the combination and
arrangement of parts may be resorted to without departing from the
spirit and scope of the invention as hereinafter claimed.
* * * * *