U.S. patent application number 11/998474 was filed with the patent office on 2009-06-04 for pump for bottle.
Invention is credited to Pin-Yen Chen.
Application Number | 20090140009 11/998474 |
Document ID | / |
Family ID | 40674699 |
Filed Date | 2009-06-04 |
United States Patent
Application |
20090140009 |
Kind Code |
A1 |
Chen; Pin-Yen |
June 4, 2009 |
Pump for bottle
Abstract
A pump for a bottle is disclosed. The pump comprises a lid for
being assembled to a mouth of the bottle, a shell settled inside
the lid, a drawing tube connected to a lower end of the shell with
a one-way valve settled therebetween so that contents in the bottle
can be drawn into the shell through the drawing tube and retained
from reversely flowing back to the bottle, a pressing head for
controlling a piston tube to axially shift in the lid and the
shell, an elastic member settled in the shell so as to axially
deform and resile in responding to the axially shifting piston tube
so that the contents in the bottle can enter the shell through the
one-way valve and be extruded into the piston tube through a radial
hole so as to be expelled at an outlet of the pressing head.
Inventors: |
Chen; Pin-Yen; (Changhua
County, TW) |
Correspondence
Address: |
CHARLES E. BAXLEY, ESQUIRE
90 JOHN STREET, SUITE 309
NEW YORK
NY
10038
US
|
Family ID: |
40674699 |
Appl. No.: |
11/998474 |
Filed: |
November 30, 2007 |
Current U.S.
Class: |
222/207 |
Current CPC
Class: |
B05B 11/3026
20130101 |
Class at
Publication: |
222/207 |
International
Class: |
B65D 37/00 20060101
B65D037/00 |
Claims
1. A pump for a bottle, comprising: a lid, for being combined with
a mouth of the bottle; a shell, having an upper end thereof
airtightly assembled with an inner surface of the lid and having a
lower end thereof connected to a drawing tube extending into the
bottle, in which a one-way valve is provided between the drawing
tube and the shell; a piston tube, which is capable of axially
shifting along an axis of the lid, and has an axial hole and at
least one radial hole communicate with the axial hole, in which a
section of the piston tube having the radial hole is pierced into
the shell; a pressing head, fixed at an upper end of the piston
tube and having an outlet communicated to the axial hole; and an
elastic member, which is made of a flexible material so as to
repeatedly deform and resile in responding to the axially shifting
piston tube so that contents in the bottle enters the shell through
the one-way valve and enters the axial hole of the piston tube
through the radial hole to be expelled at the outlet of the
pressing head.
2. The pump of claim 1, wherein, the elastic member comprises a
neck and a body that are coaxially and integrally formed, in which
the neck is mounted around and fixed to the section of the piston
tube pierced into the shell and normally blocks the radial hole
while the body has an outer surface abutting an inner wall of the
shell and has an inner space.
3. The pump of claim 2, wherein, when the elastic member axially
moves downward along the piston tube, the elastic member performs a
first deformation and a second deformation.
4. The pump of claim 3, wherein, the first deformation is presented
at the neck to cause the radial hole of the piston tube to appear
in the inner space of the body.
5. The pump of claim 4, wherein, the first deformation is an axial
compression of the neck.
6. The pump of claim 5, wherein, the neck comprises at least one
annular reduced section.
7. The pump of claim 3, wherein, the second deformation is
presented at the body to cause the inner space to get compressed
and pressurized.
8. The pump of claim 7, wherein, the second deformation is an axial
compression of the body.
9. The pump of claim 8, wherein, the body comprises at least one
annular reduced section.
10. The pump of claim 2, wherein, the piston tube has a pressing
head connecting portion and an elastic member connecting portion
that are coaxially and integrally formed, in which the pressing
head connecting portion is connected to the pressing head while the
elastic member connecting portion is connected to the neck of the
elastic member and the axial hole passes through the pressing head
connecting portion and the elastic member connecting portion while
the radial hole is arranged at the elastic member connecting
portion.
11. The pump of claim 1, wherein, the lid, the piston tube and the
shell are made of a plastic material.
12. The pump of claim 1, wherein, the one-way valve is made of a
plastic material.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Technical Field
[0002] The present invention relates to a pump for extruding and
expelling contents from a bottle.
[0003] 2. Description of Related Art
[0004] A known pump is used at a mouth of a bottle for extruding
and expelling thick contents from the bottle. In FIG. 1, a
conventional pump is provided. Such pump has a lid 10 for being
combined with a mouth of a bottle and a sleeve 11 having an
accommodating space 111. The sleeve 11 has an upper end thereof
assembled in the lid 10 and is connected to a drawing tube 12
extending into the bottle. A one-way valve 13 is settled between
the sleeve 11 and the drawing tube 12, and is controlled by a steel
ball 131. A piston tube 14 has a lower end thereof pierced into the
lid 10 and connected to a first elastic member 15 having a lower
end thereof positioned in the accommodating space 111 of the sleeve
11. A second elastic member 16 abuts an inner wall of the sleeve 11
and embraces an outer periphery of the first elastic member 15. An
interval 165 exists between an upper end of the second elastic
member 16 and the lower end of the piston tube 14. The first
elastic member 15 has a radial hole 151 and an axial hole 152 that
are communicated mutually. The axial hole 152 is further
communicated to the piston tube 14 and the second elastic member 16
normally blocks the radial hole 151. A gate 17 is provided between
the first elastic member 15 and the second elastic member 16. By
opening or closing the gate 17, the accommodating space 111 of the
sleeve 11 is communicated to or disconnected from the radial hole
151 of the first elastic member 15. A pressing head 18 having an
outlet 181 is assembled at an upper end of the piston tube 14. A
spring 19 is mounted around an exterior of the piston tube 14 such
that two ends of the spring 19 are stopped at the pressing head 18
and the lid 10, respectively.
[0005] FIGS. 2 and 3 are provided for explaining how the pump
expels the contents from the bottle through the outlet 181. To
expel the contents from the bottle, it is important that the
pressing head 18 is pressed downward to the extreme in a single
pressing operation. In such pressing operation, the first elastic
member 15 and the second elastic member 16 move asynchronously. As
shown in FIG. 2, the pressing head 18 is pressed and in an initial
stage of moving downward. At this time, the piston tube 14 moves
downward in company with the first elastic member 15 to open the
gate 17 between the first elastic member 15 and the second elastic
member 16 so that the accommodating space 111 of the sleeve 11
become communicated with the radial hole 151 of the first elastic
member 15. Meanwhile, the accommodating space 111 of the sleeve 11
is internally pressurized so that the steel ball 131 moves downward
to close the one-way valve 13. In FIG. 3, now the pressing head 18
is further pressed and moves further downward. At this time, the
lower end of the piston tube 14 pushed the upper end of the second
elastic member 16 to make the second elastic member 16 move
downward so that the accommodating space 111 is further internally
pressurized. Thus, if the accommodating space 111 is now filled
with contents, the contents can enter the radial hole 151 through
the gate 17 and enter the piston tube 14 through the axial hole 152
so as to reach the outlet 181 and be expelled.
[0006] On the contrary, when the pressing head 18 is released, the
spring 19 resiles to push upward and reposition the pressing head
18, the piston tube 14, the first elastic member 15, and the second
elastic member 16 so as to produce a drawing force. Thereupon, the
contents in the bottle can enter the accommodating space 111
through the drawing tube 12 and the one-way valve 13 and wait for
the next pressing operation.
[0007] It would be absolutely convenient for a user to press the
pressing head 18 once to expel the contents from the bottle.
However, in the perspective of a manufacturer, such conventional
pump requires a relatively large amount of components and
time-consumptive assembly so that the selling benefit is
significantly reduced due to the increased manufacturing costs.
Besides, a user of the above-discussed conventional pump bears a
risk that the contents in the bottle may interact with the metal
spring and steel ball of the pump, resulting in unexpected
deterioration.
SUMMARY OF THE INVENTION
[0008] The present invention has been accomplished under these
circumstances in view to provide a novel design of a pump used at a
mouth of a bottle.
[0009] A pump for a bottle is disclosed. The pump comprises a lid
for being assembled to a mouth of the bottle, a shell settled
inside the lid, a drawing tube connected to a lower end of the
shell with a one-way valve settled therebetween so that contents in
the bottle can be drawn into the shell through the drawing tube and
retained from reversely flowing back to the bottle, a pressing head
for controlling a piston tube to axially shift in the lid and the
shell, an elastic member settled in the shell so as to axially
deform and resile in responding to the axially shifting piston tube
so that the contents in the bottle can enter the shell through the
one-way valve and be extruded into the piston tube through a radial
hole so as to be expelled at an outlet of the pressing head.
[0010] It is one objective of the present invention to provide a
pump for a bottle with a simplified configuration. As compared with
the conventional pump, the disclosed subject matter employs fewer
components and is easier to be assembled while the objective of
expelling a predetermined amount of contents from the bottle by a
single pressing operation is achieved.
[0011] It is one objective of the present invention to provide a
pump for a bottle without any metal components and spring so as to
keep the contents in the bottle from unexpectedly
deteriorating.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The invention as well as a preferred mode of use, further
objectives and advantages thereof, will best be understood by
reference to the following detailed description of an illustrative
embodiment when read in conjunction with the accompanying drawings,
wherein:
[0013] FIG. 1 is a schematic cross sectional view of a conventional
pressing head;
[0014] FIG. 2 is another schematic cross sectional view of the
conventional pressing head showing a first elastic member being
moved by the pressing head;
[0015] FIG. 3 is another schematic cross sectional view of the
conventional pressing head showing a second elastic member being
moved by the pressing head;
[0016] FIG. 4 is a schematic cross sectional view of a pump of the
present invention showing deformable reduced sections provided on a
lower end of a neck of an elastic member and a shoulder portion of
a body;
[0017] FIG. 5 is another schematic cross sectional view of a pump
of the present invention showing the lower end of the neck of the
elastic member deformed;
[0018] FIG. 6 is another schematic cross sectional according to
FIG. 5 and further showing the shoulder portion of the body
deformed;
[0019] FIG. 7 is another schematic cross sectional view of a pump
of the present invention showing deformable reduced sections
provided on an upper end of the neck of the elastic member and a
sidewall of the body;
[0020] FIG. 8 is another schematic cross sectional view of a pump
of the present invention showing the upper end of the neck of the
elastic member deformed; and
[0021] FIG. 9 is another schematic cross sectional according to
FIG. 5 and showing the elastic member further deformed at the
sidewall of the body.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0022] As the drawings recited in the following embodiments are
provided for illustrating the concept of the present invention as
described above, it is to be understood that the deformation and
displacement of the components in these drawings are made for
better explanation and need not to be made in scale.
[0023] According to FIG. 4, the disclosed subject matter comprises
a lid 20 for being assembled to a mouth of a bottle (not shown),
and a shell 25 having an upper end thereof airtightly combined with
an inner surface of the lid 20 and having a lower end thereof
connected to a drawing tube 26 extending into the bottle. The shell
25 has a one-way valve 251 settled at the lower end thereof and
between the shell 25 and the drawing tube 26, wherein the one-way
valve 251 is opened or closed by a stopcock 27. A piston tube 30
comprises coaxially and integrally formed a pressing head
connecting portion 31, an elastic member connecting portion 32 and
an axial hole 33 communicating the two connecting portions 31, 32.
The pressing-head connecting portion 31 is fixedly connected to a
pressing head 40, which has an outlet 41, while the elastic member
connecting portion 32 is used to fixedly connected to an elastic
member 50. The elastic member connecting portion 32 has a radial
hole 34 communicated to the axial hole 33. The elastic member 50
comprises a neck 51 and a body 52 that are coaxially and integrally
formed. The neck 51 is mounted around and affixed to an exterior of
the elastic member connecting portion 32. The body 52 has an outer
surface thereof abutting an inner surface of the shell 25. The body
52 is shaped as a bell that includes an inner space 520 and an
opening at a lower end thereof. The shell 25 has a flange 252
extending toward an axis thereof for receiving a lower periphery of
the body 52. The elastic member 50 is made of a flexible material
(such as rubber) so as to give an ability of deforming when being
compressed and resiling when being released. Therefore, when the
elastic member 50 is compressed, the neck 51 and the body 52 become
deformed successively as two-stage deformation. On the other hand,
the lid 20, the piston tube 30, the shell 25 and the one-way valve
251 are made of plastic materials.
[0024] The mentioned two-stage deformation happens when the
pressing head 40 is pressed to push the piston tube 30 downward.
Referring to FIGS. 4 through 6, such two-stage deformation includes
a first deformation 511 and a second deformation 521. The first
deformation 511 is presented at the neck 51 of the elastic member
50 while the second deformation 521 is presented at the body 52 of
the elastic member 50. The first deformation 511 happens at an
initial stage when the piston tube 30 moves downward. The mentioned
deformation refers to an axial compression of the neck 51 that
allows the radial hole 34 of the piston tube 30 to appear in the
inner space 520 of the body 52. The second deformation 521 happens
when the piston tube 30 further moves downward and when the axial
compression of the neck 51 is developed to the extreme. The
mentioned deformation refers to an axial compression of the body 52
that makes the inner space 520 become compressed and internally
pressurized. The first deformation 511 and the second deformation
521 of the elastic member 50 make the stopcock 27 shift vertically
so as to open or close the one-way valve 251. Thereby, the contents
in the bottle can enter the shell 25 and the inner space 520 of the
body 52 through the drawing tube 26 and the one-way valve 251. Then
a predetermined amount of the contents can be extruded from the
inner space 520 and expelled at the outlet 41 through the radial
hole 34 and the axial hole 33.
[0025] Referring to FIGS. 4 through 6 and 7 through 9, it can be
seen how the disclosed subject matter expels the contents from the
bottle through the outlet 41 of the pressing head 40. It has been
known that when the shell 25 and the inner space 520 are empty, a
user can exhaust the air in the inner space 520 by pressing the
pressing head 40 several times so as to make the contents of the
bottle enter and fill the inner space 520. Once the inner space 520
is filled with the contents, during the next time the user presses
the pressing head 40, the piston tube 30 moves downward to cause
the first deformation 511 of the elastic member 50 so that the
redial hole 34 of the piston tube 30 enters the inner space 520.
Following this, the second deformation 521 of the elastic member 50
is performed to compress the inner space 520 so that the stopcock
27 blocks the one-way valve 251 and contents are extruded into the
axial hole 33 through the redial hole 34 so as to be expelled at
the outlet 41. On the contrary, when the pressing head 40 is
released, the elastic member 50 resiles to push upward and
reposition the piston tube 30. Thus, the inner space 520 is now in
a negative pressure status. At this time, the contents in the
bottle pushes the stopcock 27 from the drawing tube 26 so as to
enter the inner space 520 through the one-way valve 251 and await
the next pressing operation.
[0026] According to the present embodiment, the two-stage
deformation of the elastic member 50 may be provided by the
structures shown in FIGS. 4 and 7. At predetermined portions of the
neck 51, 51' and the body 52, 52', the thickness thereof may be
reduced to form deformable reduced sections 512, 512' and 522,
522'. The reduced sections may be arranged at any portion of the
neck. For instance, in FIG. 4, the reduced section 512 is provided
at a lower end of the neck 51. Alternatively, in FIG. 7, the
reduced section 512' is provided at an upper end of the neck 51'.
In both instances, the reduced sections enable the axial
deformation of the neck. The reduced section of the body may be
provided at any portion of the body. For instance, in FIG. 4, the
reduced section 522 is provided at a shoulder portion of the body
52 so that the body 52 is deformed at the shoulder, as shown in
FIG. 6. Alternatively, in FIG. 7, the reduced section 522' is
provided at a sidewall of the body 52' so that the body 52 is
deformed at the sidewall, as shown in FIG. 9.
[0027] Although a particular embodiment of the invention has been
described in detail for purposes of illustration, it will be
understood by one of ordinary skill in the art that numerous
variations will be possible to the disclosed embodiments without
going outside the scope of the invention as disclosed in the
claims.
* * * * *