U.S. patent application number 14/825994 was filed with the patent office on 2017-02-16 for telescopic pump.
The applicant listed for this patent is CHUAN JIING ENTERPRISE CO., LTD.. Invention is credited to Tien-Tsai Tseng.
Application Number | 20170045045 14/825994 |
Document ID | / |
Family ID | 57995410 |
Filed Date | 2017-02-16 |
United States Patent
Application |
20170045045 |
Kind Code |
A1 |
Tseng; Tien-Tsai |
February 16, 2017 |
TELESCOPIC PUMP
Abstract
A telescopic pump includes a bellow, a cover and a rod. The
bellow includes a first end, a second end and a compressible space
in communication with exterior of the bellow via the first end. The
cover includes a channel in communication with the first end of the
bellow. The rod is connected to the second end of the bellow so
that the rod is operable to move the bellow between an extended
position and a compressed position. The second end of the bellow is
far from the first end of the bellow to enlarge the compressible
space to suck fluid into the compressible space in the extended
position. The second end of the bellow is close to the first end of
the bellow to reduce the compressible space to expel the fluid from
the compressible space in the compressed position.
Inventors: |
Tseng; Tien-Tsai; (TAICHUNG,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CHUAN JIING ENTERPRISE CO., LTD. |
Taichung City |
|
TW |
|
|
Family ID: |
57995410 |
Appl. No.: |
14/825994 |
Filed: |
August 13, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04B 9/14 20130101; F04B
43/0054 20130101; F04B 45/02 20130101 |
International
Class: |
F04B 45/02 20060101
F04B045/02; F04B 53/10 20060101 F04B053/10 |
Claims
1. A telescopic pump comprising: a bellow comprising a first end, a
second end and a compressible space in communication with exterior
of the bellow via the first end; a cover comprising a channel in
communication with the first end of the bellow; and a rod connected
to the second end of the bellow so that the rod is operable to move
the bellow between an extended position and a compressed position,
wherein the second end of the bellow is far from the first end of
the bellow to enlarge the compressible space to suck fluid into the
compressible space in the extended position, wherein the second end
of the bellow is close to the first end of the bellow to reduce the
compressible space to expel the fluid from the compressible space
in the compressed position.
2. The telescopic pump according to claim 1, wherein the channel of
the cover comprises a first open end in communication with the
first end of the bellow.
3. The telescopic pump according to claim 2, wherein the channel of
the cover comprises a second open end via which the channel is in
communication with the exterior of the telescopic pump.
4. The telescopic pump according to claim 2, wherein the channel of
the cover comprises a second open end to allow fluid to travel out
of the bellow and a third open end to allow the fluid to travel
into the bellow.
5. The telescopic pump according to claim 4, further comprising: a
first check valve inserted in the first open end of the channel of
the cover to only allow the fluid to travel into the bellow via the
first open end; and a second check valve inserted in the second
open end of the channel of the cover to only allow the fluid to
travel out of the bellow via the second open end.
6. The telescopic pump according to claim 5, wherein the cover
further comprises: a transverse connecting portion extending around
a portion of the channel near the open end; and a protrusion
extending around a portion of the channel near the second open
end.
7. The telescopic pump according to claim 6, further comprising a
tubular element formed with an end connected to the transverse
connecting portion of the cover.
8. The telescopic pump according to claim 7, further comprising a
filter inserted in and located between the tubular element and
transverse connecting portion.
9. The telescopic pump according to claim 1, further comprising a
handle connected to the rod, opposite to the bellow.
10. The telescopic pump according to claim 9, wherein the rod
comprises a first end connected to the handle and a second end
connected to the second end of the bellow.
11. The telescopic pump according to claim 1, further comprising a
shell for containing the bellow.
12. The telescopic pump according to claim 11, wherein the cover is
connected to the shell.
13. The telescopic pump according to claim 12, wherein the shell
comprises a front open end connected to the cover and a rear open
end for receiving the rod to guide the rod to move smoothly
relative to the shell.
14. The telescopic pump according to claim 13, wherein the cover
comprises a longitudinal connecting portion connected to the front
open end of the shell.
15. The telescopic pump according to claim 11, wherein the shell
comprises a window via which the bellow is visible.
16. The telescopic pump according to claim 15, wherein the shell
further comprises a scale near and along the window.
17. The telescopic pump according to claim 16, wherein the bellow
further comprises an indicator visible through the window so that
the position of the indicator relative to the scale is used to
determine the volume of the compressible space.
Description
BACKGROUND OF INVENTION
[0001] 1. Field of Invention
[0002] The present invention relates to a pump and, more
particularly, to a telescopic pump.
[0003] 2. Related Prior Art
[0004] A conventional telescopic pump includes a cylinder, a piston
and a rod. The piston is movably inserted in the cylinder. The rod
includes an end connected to the piston and another end connected
to a handle operable to move the piston to and fro in the cylinder
to suck fluid into the cylinder and expel the fluid from the
cylinder.
[0005] The efficiency of the sucking and expelling of the fluid is
closely related to the extent to which the piston is in contact
with the cylinder. The efficiency is higher as the contact is
tighter. Hence, the piston is always provided with a sealing ring
for tight contact with the cylinder.
[0006] However, there is considerable friction between the sealing
ring and the cylinder, and such friction causes resistance against
the movement of the piston relative to the cylinder. Hence, the
movement of the piston in the cylinder is difficult. Moreover, the
piston is generally made of rubber which is vulnerable to erosion
by acid. Such erosion affect the contact of the piston with the
cylinder and hence the efficiency of the sucking and expelling of
the fluid.
[0007] The present invention is therefore intended to obviate or at
least alleviate the problems encountered in prior art.
SUMMARY OF INVENTION
[0008] It is the primary objective of the present invention to
provide an efficient and reliable telescopic pump.
[0009] To achieve the foregoing objective, the telescopic pump
includes a bellow, a cover and a rod. The bellow includes a first
end, a second end and a compressible space in communication with
exterior of the bellow via the first end. The cover includes a
channel in communication with the first end of the bellow. The rod
is connected to the second end of the bellow so that the rod is
operable to move the bellow between an extended position and a
compressed position. The second end of the bellow is far from the
first end of the bellow to enlarge the compressible space to suck
fluid into the compressible space in the extended position. The
second end of the bellow is close to the first end of the bellow to
reduce the compressible space to expel the fluid from the
compressible space in the compressed position.
[0010] Other objectives, advantages and features of the present
invention will be apparent from the following description referring
to the attached drawings.
BRIEF DESCRIPTION OF DRAWINGS
[0011] The present invention will be described via detailed
illustration of three embodiments referring to the drawings
wherein:
[0012] FIG. 1 is an exploded view of a telescopic pump according to
the first embodiment of the present invention;
[0013] FIG. 2 is a perspective view of the telescopic pump shown in
FIG. 1;
[0014] FIG. 3 is a cross-sectional view of the telescopic pump
illustrated in FIG. 2;
[0015] FIG. 4 is a cross-sectional view of the telescopic pump in
another position than shown in FIG. 3;
[0016] FIG. 5 is a partial and cross-sectional view of the
telescopic pump according to the second embodiment of the present
invention; and
[0017] FIG. 6 is a partial and cross-sectional view of the
telescopic pump according to the third embodiment of the present
invention.
DETAILED DESCRIPTION OF EMBODIMENTS
[0018] Referring to FIGS. 1 through 4, a telescopic pump 10
includes a bellow 20, a cover 30, a rod 40, a shell 50, a tubular
element 60, a filter 70 and a check valve unit (not numbered) in
accordance with a first embodiment of the present invention. The
bellow 20 is entirely inserted in the shell 50. The rod 40 is
partially inserted in the shell 50. The cover 30 is connected to
the shell 50. The cover 30 is further connected to the tubular
element 60. The filter 70 is inserted in the cover 30. The check
valve unit is also inserted in the cover 30.
[0019] The shell 50 includes a front open end 52, a rear open end
54, a window 56 and a scale 58. The shell 50 includes, near the
front open end 52, a thread (not numbered). The rear open end 54 is
made with an internal diameter smaller than that of the front open
end 52. The window 56 is a slot made in the periphery of the shell
50. The window 56 extends in a longitudinal direction of the shell
50. The scale 58 is formed on an external side of the shell 50. The
scale 58 is arranged in a longitudinal direction of the shell
50.
[0020] The bellow 20 includes an indicator 22, a first end 24, a
second end 26 and a compressible space 28. The compressible space
28 is made in the bellow 20 and is in communication with the
exterior of the bellow 20 via both of the first end 24 and the
second end 26. By printing for example, the indicator 22 is
provided on an internal side of the bellow 20, between the first
end 24 and the second end 26.
[0021] The cover 30 includes a protrusion 31, a transverse
connecting portion 33, an external longitudinal connecting portion
37, an internal longitudinal connecting portion (not numbered) and
a channel 32. The channel 32 is a T-shaped channel including three
open ends 34, 36 and 38. The open end 34 is located between the
open ends 36 and 38. The open end 36 is located opposite to the
open end 38. The protrusion 31 is a tubular portion extending
around a portion of the channel 32 near the open end 36. The
transverse connecting portion 33 is a tubular portion extending
around a portion of the channel 32 near the open end 34. A thread
35 is formed on an external side of the transverse connecting
portion 33. The internal longitudinal connecting portion is a
tubular portion extending around a portion of the channel 32 near
the open end 38. The external longitudinal connecting portion 37 is
an annular portion extending around the internal longitudinal
connecting portion.
[0022] The internal longitudinal connecting portion of the cover 30
includes a thread (not numbered) engaged with a thread (not
numbered) formed at the first end 24 of the bellow 20 to connect
the cover 30 to the bellow 20. The open end 38 of the channel 32 is
in communication with the first end 24 of the bellow 20 as the
cover 30 is connected to the bellow 20.
[0023] The external longitudinal connecting portion 37 of the cover
30 includes, on an internal side, a thread (not numbered) engaged
with a thread (not numbered) formed on a portion of the shell 50
around the front open end 52. Thus, the external longitudinal
connecting portion 37 of the cover 30 is connected to the front
open end 52 of the shell 50.
[0024] The check valve unit includes two check valves 74. The first
check valve 74 is inserted in a portion of the cover 30 in the
vicinity of the open end 34 of the channel 32 to allow fluid to
enter the telescopic pump 10, but not vice versa. The second check
valve 74 is inserted in a portion of the cover 30 near the open end
36 of the channel 32 to allow fluid to leave the telescopic pump
10, but not vice versa.
[0025] The rod 40 includes an enlarged end 42 and a reduced end 46.
The reduced end 46 of the rod 40 is located opposite to the
enlarged end 42. The enlarged end 42 is in the shape of a
receptacle that includes a cavity 44 made therein. The wall of the
cavity 44 of the enlarged end 42 is formed with a thread engaged
with a thread formed on the second end 26 of the bellow 20. A
handle 48 is connected to the reduced end 46. Hence, the handle 48
is operable to move the bellow 20 between an extended position and
a compressed position via the rod 40. A portion of the rod 40 that
extends between the enlarged end 42 and the reduced end 46 is
inserted in the rear open end 54 to allow the rod 40 to
longitudinally move relative to the shell 50.
[0026] The tubular element 60 includes a small portion 62 and a
large portion 64. The small portion 62 is made with a diameter
smaller than that of the large portion 64. The large portion 64
includes, on an internal side, a thread 66 engaged with the thread
35 to connect the tubular element 60 to the transverse connecting
portion 33 in a detachable manner. The small portion 62 of the
tubular element 60 is located opposite to the large portion 64. The
small portion 62 can be inserted in and hence connected to a pipe
or a container (not shown).
[0027] The filter 70 is inserted in and located between the tubular
element 60 and transverse connecting portion 33. The filter 70
preferably includes an annular flange (not numbered) that extending
around a dome (not numbered). The dome of the filter 70 is inserted
in the transverse connecting portion 33 via the open end 34. The
annular flange of the filter 70 is sandwiched between the large
portion 64 and the transverse connecting portion 33.
[0028] In use, the handle 48 is operable to move the bellow 20
between an extended position and a compressed position between via
the rod 40. In the extended position, the second end 26 of the
bellow 20 is far from the first end 24 of the bellow 20 to enlarge
the compressible space 28 to suck fluid into the compressible space
28 via the open end 34 of the cover 30.
[0029] In the compressed position, the second end 26 of the bellow
20 is close to the first end 24 of the bellow 20 to reduce the
compressible space 28 to expel the fluid from the compressible
space 28 via the open end 36 of the cover 30.
[0030] The change in the volume of the compressible space 28 causes
the position of the indicator 22 in the window 56 to change. Hence,
the position of the indicator 22 relative to the scale 58 is
visible to help a user to determine the volume of the compressible
space 28.
[0031] It should be noted that the bellow 20 is not in contact with
an internal side of the shell 50, i.e., the bellow 20 does not rub
against the shell 50 so that there is not friction between the
bellow 20 and the shell 50. The operation of the telescopic pump 10
is hence easier than that of a conventional telescopic pump.
Moreover, the bellow 20 is made of an acid-resistant material such
as Teflon and fluorinated resin to prevent erosion and exhibits a
sealing property better than that of a seal.
[0032] Referring to FIG. 5, there is a telescopic pump 10 according
to a second embodiment of the present invention. The second
embodiment is identical to the first embodiment except for two
features. Firstly, the channel 32 of the cover 30 does not include
the open end 34. That is, the channel 32 includes only the open end
36 and the open end 38. Secondly, the telescopic pump 10 does not
include any check valve. Hence, the fluid can travel into and out
of the channel 32 of the cover 30 via the open end 36 and the open
end 38, without affecting the sucking of the fluid into the bellow
20 in the extended position or the expelling of the fluid from the
bellow 20 in the compressed position.
[0033] Referring to FIG. 6, there is a telescopic pump 10 according
to a third embodiment of the present invention. The third
embodiment is identical to the first embodiment except that the
protrusion 31 and the cover 30 are two individual elements. Like
the tubular element 60, the protrusion 31 is formed with a thread
(not numbered) engaged with the thread 35 of the cover 30 so that
the channel 32 still includes three open ends. Like the tubular
element 60, the protrusion 31 can be made of different sizes and
shapes for connection to pipes of different sizes and shapes.
[0034] The present invention has been described via the detailed
illustration of the embodiments. Those skilled in the art can
derive variations from the embodiments without departing from the
scope of the present invention. Therefore, the embodiments shall
not limit the scope of the present invention defined in the
claims.
* * * * *