US20090068038A1 - Pump - Google Patents
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- Publication number
- US20090068038A1 US20090068038A1 US11/852,942 US85294207A US2009068038A1 US 20090068038 A1 US20090068038 A1 US 20090068038A1 US 85294207 A US85294207 A US 85294207A US 2009068038 A1 US2009068038 A1 US 2009068038A1
- Authority
- US
- United States
- Prior art keywords
- cylinder
- pump according
- base
- recess
- threaded bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B33/00—Pumps actuated by muscle power, e.g. for inflating
- F04B33/005—Pumps actuated by muscle power, e.g. for inflating specially adapted for inflating tyres of non-motorised vehicles, e.g. cycles, tricycles
Abstract
A pump includes a cylinder including at least one upper aperture and lower aperture. A piston is movable in the cylinder. A rod is connected to the piston. A ring is provided around the rod and fit in the cylinder. An upper collar is formed with at least one countersink hole and provided around the cylinder. At least one upper threaded bolt is driven into the ring through the countersink hole, the upper aperture and an upper elastic washer. A base includes a reduced portion fit in the cylinder. A check valve is provided on the reduced portion of the base. A lower collar is formed with at least one countersink hole and provided around the cylinder. At least one lower threaded bolt is driven into the reduced portion of the base through the countersink hole of the lower collar, the lower aperture and a lower elastic washer.
Description
- 1. Field of Invention
- The present invention relates to a pump and, more particularly, to a pump including a fastening device for fastening a ring or base to a cylinder so that the wall of the cylinder can be made thin and light and the making and assembly of the parts are easy and inexpensive.
- 2. Related Prior Art
- Referring to
FIG. 10 , a conventional pump includes acylinder 70, apiston 71 movable in thecylinder 70, arod 72 connected to thepiston 71, abase 73 connected to a lower end of thecylinder 70, aflexible pipe 77 connected to thebase 73, aring 75 connected to an upper end of thecylinder 70. Thebase 73 is formed with athread 74 engaged with athread 702 formed on the internal side of the lower end of thecylinder 70. Thering 75 is formed with athread 76 engaged with athread 701 formed on the internal side of the upper end of thecylinder 70. To tape thethreads cylinder 70 is inevitably made thick and therefore heavy. Accordingly, thebase 73 andring 75 are made big and therefore heavy. Thecylinder 70,base 73 andring 75 are expensive for using a lot of material. Moreover, it requires a special machine, takes a lot of time and therefore costs a lot of money to tape thethreads - Referring to
FIG. 11 , another conventional pump includes acylinder 80, apiston 81, arod 82, abase 85, aconnector 83, arigid tube 88 and aflexible pipe 90. Thebase 85 includes asocket 92 thereon, aconduit 86 next to thesocket 92 and abowl 84 on theconduit 86. Thepiston 81 is movable in thecylinder 80. Therod 82 is connected to thepiston 81. Theconnector 83 is disposed in a lower end of thecylinder 80 that is inserted in thesocket 92. Therigid tube 88 is transversely inserted through thebase 85,cylinder 80,connector 83 andconduit 86. Theflexible pipe 90 is connected to thetube 88. Thecylinder 80,connector 83,socket 92,rigid tube 88,conduit 86 andbowl 84 are in communication of fluid with one another. This conventional pump includes a complicated structure consisting of a lot of parts. It consumes a lot of material, takes a lot of time and therefore costs a lot of money to make these parts. It also takes a lot of time and therefore costs a lot of money to assemble the parts. Moreover, pressurized air travels from thecylinder 80 to theflexible pipe 90 through theconnector 83 and therigid tube 88. The pressurized could easily leak. - The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
- It is an objective of the present invention to provide an inexpensive pump for using a small amount of material.
- It is another objective of the present invention to provide a pump with parts that are made and assembled in a short period of time with a small amount of effort.
- It is another objective of the present invention to provide a secure pump from which leak is limited.
- To achieve the foregoing objectives of the present invention, a pump includes a cylinder including at least one upper aperture and lower aperture. A piston is movable in the cylinder. A rod is connected to the piston. A ring is provided around the rod and fit in the cylinder. An upper collar is formed with at least one countersink hole and provided around the cylinder. At least one upper threaded bolt is driven into the ring through the countersink hole, the upper aperture and an upper elastic washer. A base includes a reduced portion fit in the cylinder. A check valve is provided on the reduced portion of the base. A lower collar is formed with at least one countersink hole and provided around the cylinder. At least one lower threaded bolt is driven into the reduced portion of the base through the countersink hole of the lower collar, the lower aperture and a lower elastic washer.
- Other objectives, advantages and features of the present invention will become apparent from the following description referring to the attached drawings.
- The present invention will be described via the detailed illustration of three embodiments referring to the drawings.
-
FIG. 1 is a perspective view of a pump according to the first embodiment of the present invention. -
FIG. 2 is an exploded view of the pump shown inFIG. 1 . -
FIG. 3 is an enlarged partial view of the pump shown inFIG. 2 . -
FIG. 4 is another enlarged partial view of the pump shown inFIG. 2 . -
FIG. 5 is a cross-sectional view of the pump shown inFIG. 1 . -
FIG. 6 is a cross-sectional view of the pump shown inFIG. 3 . -
FIG. 7 is a cross-sectional view of the pump shown inFIG. 4 . -
FIG. 8 is an exploded view of a pump according to the second embodiment of the present invention. -
FIG. 9 is a cross-sectional view of a pump according to the third embodiment of the present invention. -
FIG. 10 is a perspective view of a conventional pump. -
FIG. 11 is a perspective view of another conventional pump. - Referring to
FIGS. 1 through 7 , a pump includes acylinder 30, apiston 31, apiston ring 34, arod 32, ahandle 33, aring 40, anupper fastening device 60, abase 10, alower fastening device 50 and aflexible pipe 20 according to a first embodiment of the present invention. - The
cylinder 30 includes twoopposite apertures 54 in a lower end thereof and twoopposite apertures 64 in an upper end thereof. - The
piston 31 is movable in thecylinder 30. Thepiston ring 34 is provided on thepiston 31. Therod 32 is connected to thepiston 31. Thehandle 33 is connected to therod 32. - The
ring 40 includes a reducedportion 41 and two oppositehexagonal recesses 61 in the reducedportion 41. The reducedportion 41 of thering 40 is fit in the upper end of thecylinder 30 so thathexagonal recesses 61 are in communication with theapertures 64. Therod 32 is inserted through thering 40. - The
upper fastening device 60 includes acollar 66, twohexagonal nuts 62, twoelastic washers 63 and two threadedbolts 65. Each of thehexagonal nuts 62 and a related one of theelastic washers 63 are fit in a related one of the hexagonal recesses 61. Thecollar 66 includes two opposite countersink holes 67 therein and twoopposite clips 68 thereon. Thecollar 66 is provided on the upper end of thecylinder 30 so that the countersink holes 67 are in communication with theapertures 64. The threadedbolts 65 are inserted through the countersink holes 67 and 64 andelastic washers 63 and engaged with the hexagonal nuts 62. Theelastic washers 63 are made of rubber for example. Theelastic washers 63 are expanded in a radial direction when they are compressed axially. Thus, the wall of each of the hexagonal recesses 61 is pressed by the external side of a related one of theelastic washers 63, and each of the threadedbolts 65 is pinched by the internal side of a related one of theelastic washers 63. - The
base 10 includes apassageway 11 therein, atread 12 at a lower end thereof, a reducedportion 13 at an upper end thereof and two oppositehexagonal recesses 51 in the reducedportion 13. Acheck valve 14 is provided on the reducedportion 13 of thebase 10. The reducedportion 13 of thebase 10 is fit in the lower end of thecylinder 30 so thathexagonal recesses 51 are in communication with theapertures 54. - A first end of the
flexible pipe 20 is connected to the base 10 so that the passageway of theflexible pipe 20 is in communication of fluid with thepassageway 11 of thebase 10. A second end of theflexible pipe 20 is connected to anozzle 21 for receiving a valve of an inflatable object such as a tire. Theflexible pipe 20 can be clipped by any of theclips 68 during storage and transportation. - The
lower fastening device 50 includes acollar 56, twohexagonal nuts 52, twoelastic washers 53 and two threadedbolts 55. Each of thehexagonal nuts 52 and a related one of theelastic washers 53 are fit in a related one of the hexagonal recesses 51. Thecollar 56 includes two opposite countersink holes 57 therein. Thecollar 56 is provided on the lower end of thecylinder 30 so that the countersink holes 57 are in communication with theapertures 54. The threadedbolts 55 are inserted through the countersink holes 57 and 54 andelastic washers 53 and engaged with the hexagonal nuts 52. Theelastic washers 53 are made of rubber for example. Theelastic washers 53 are expanded in a radial direction when they are compressed axially. Thus, the wall of each of the hexagonal recesses 51 is pressed by the external side of a related one of theelastic washers 53, and each of the threadedbolts 55 is pinched by the internal side of a related one of theelastic washers 53. - In use, a user maneuvers the
handle 33 to reciprocate thepiston 31 in thecylinder 30 via therod 32. In a downward stroke, thepiston 31 pressurizes air in thecylinder 30 while thecheck valve 14 avoids leak of the pressurized air from thecylinder 30. The pressurized air leaves thecylinder 30 only through theflexible pipe 20. In an upward stroke, thepiston 31 reduces the pressure in thecylinder 30 while thecheck valve 14 allows air to go into thecylinder 30 because of the reduced pressure. - Referring to
FIG. 8 , there is shown a pump according to a second embodiment of the present invention. The second embodiment is like the first embodiment except two things. Firstly, thehexagonal nuts 52 are embedded in the reducedportion 13 of the base 10 when thebase 10 is molded of plastic or metal. Theelastic washers 53 are located against the hexagonal nuts 52. Secondly, the nuts 62 are embedded in the reducedportion 41 of thering 40 when thering 40 is molded of plastic or metal. Theelastic washers 63 are located against the hexagonal nuts 62. - Referring to
FIG. 9 , there is shown a pump according to a third embodiment of the present invention that is like the first embodiment except two things. Firstly, the reducedportion 13 of thebase 10 includes twoscrew holes 59 instead of the hexagonal recesses 51. Theelastic washers 53 are located against the reducedportion 13 of thebase 10. The threadedbolts 55 are driven into the screw holes 59 through theelastic washers 53. Accordingly, thehexagonal nuts 52 are omitted. Secondly, the reducedportion 41 of thering 40 includes twoscrew holes 69 instead of the hexagonal recesses 61. Theelastic washers 63 are located against the reducedportion 41 of thering 40. The threadedbolts 65 are driven into the screw holes 69 through theelastic washers 63. Accordingly, thehexagonal nuts 62 are omitted. - The pump according to the present invention exhibits several advantages. Firstly, it is inexpensive for using a small amount of material since no thread is made on the internal side of the
cylinder 30 so that the wall of thecylinder 30 is made thin. - Secondly, its parts are made and assembled in a short period of time with a small amount of effort made since a screwdriver is all it needs to assemble the small number of parts.
- Thirdly, it is secure. The pressurized air goes through the base 10 from which leak is limited. Moreover, the
elastic washers bolts cylinder 30 to thebase 10 andring 40, respectively. - 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.
Claims (17)
1. A pump comprising:
a cylinder comprising at least one upper aperture and lower aperture;
a piston movable in the cylinder;
a rod connected to the piston;
a ring provided around the rod and fit in the cylinder;
at least one upper elastic washer;
an upper collar formed with at least one countersink hole and provided around the cylinder;
at least one upper threaded bolt driven into the ring through the countersink hole, the upper aperture and the upper elastic washer;
a base comprising a reduced portion fit in the cylinder;
a check valve provided on the reduced portion of the base;
at least one lower elastic washer;
a lower collar formed with at least one countersink hole and provided around the cylinder; and
at least one lower threaded bolt driven into the reduced portion of the base through the countersink hole of the lower collar, the lower aperture and the lower elastic washer.
2. The pump according to claim 1 , wherein the base comprises a tread opposite to the reduced portion.
3. The pump according to claim 1 comprising a flexible pipe connected to the base.
4. The pump according to claim 3 comprising a nozzle connected to the flexible pipe.
5. The pump according to claim 1 , wherein the ring comprises at least one recess for receiving the upper threaded bolt.
6. The pump according to claim 5 comprising at least one upper nut non-rotationally disposed in the recess and engaged with the upper threaded bolt.
7. The pump according to claim 6 , wherein the recess is a non-circular recess, and the upper nut is a non-circular nut disposed in the non-circular recess.
8. The pump according to claim 6 , wherein the upper elastic washer is disposed in the recess.
9. The pump according to claim 1 comprising an upper nut embedded in the ring and engaged with the upper threaded bolt.
10. The pump according to claim 1 , wherein the ring comprises a screw hole for receiving the upper threaded bolt.
11. The pump according to claim 1 , wherein the base comprises at least one recess for receiving the lower threaded bolt.
12. The pump according to claim 11 comprising at least one lower nut non-rotationally disposed in the recess and engaged with the lower threaded bolt.
13. The pump according to claim 12 , wherein the recess is a non-circular recess, and the lower nut is a non-circular nut disposed in the non-circular recess.
14. The pump according to claim 12 , wherein the lower elastic washer is disposed in the recess.
15. The pump according to claim 1 comprising a lower nut embedded in the base and engaged with the lower threaded bolt.
16. The pump according to claim 1 , wherein the base comprises a screw hole for receiving the lower threaded bolt.
17. The pump according to claim 1 comprising a handle connected to the rod.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/852,942 US20090068038A1 (en) | 2007-09-10 | 2007-09-10 | Pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/852,942 US20090068038A1 (en) | 2007-09-10 | 2007-09-10 | Pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090068038A1 true US20090068038A1 (en) | 2009-03-12 |
Family
ID=40432045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/852,942 Abandoned US20090068038A1 (en) | 2007-09-10 | 2007-09-10 | Pump |
Country Status (1)
Country | Link |
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US (1) | US20090068038A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102852766A (en) * | 2011-06-30 | 2013-01-02 | 双馀实业有限公司 | Piston rod fixing device of inflating pump |
CN103807137A (en) * | 2012-11-06 | 2014-05-21 | 双馀实业有限公司 | Inflator with grip capable of being folded |
US20220228584A1 (en) * | 2021-01-20 | 2022-07-21 | Scott Wu | Easy-to-assemble air pump |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US817538A (en) * | 1904-07-01 | 1906-04-10 | Howard Wixon | Compound air-pump. |
US1316417A (en) * | 1919-09-16 | Air-pump for pneumatic tires | ||
US1330266A (en) * | 1919-05-06 | 1920-02-10 | Michael B Holstein | Pump |
US1424928A (en) * | 1921-05-14 | 1922-08-08 | Charles S Mcclelland | Pump |
US1801395A (en) * | 1928-04-30 | 1931-04-21 | Frigidaire Corp | Pump for refrigerating apparatus |
US2419775A (en) * | 1944-07-03 | 1947-04-29 | Woodruff & Edwards Inc | Pump |
US2469328A (en) * | 1944-07-20 | 1949-05-03 | Andrew Corp | Dry-air pump |
US2985359A (en) * | 1956-06-29 | 1961-05-23 | Robert H Hunter | Hand pump |
US3005669A (en) * | 1959-10-23 | 1961-10-24 | Galland Henning Mfg Company | Fluid pressure cylinder |
US3319577A (en) * | 1965-02-25 | 1967-05-16 | Margrete L Stinnes | Sliding seal and valve for reciprocating pump plunger |
US3964572A (en) * | 1975-03-03 | 1976-06-22 | Gannon Peter F | Adjustable safety ladder for above-the-ground swimming pools |
US4878419A (en) * | 1988-06-27 | 1989-11-07 | Allied-Signal Inc. | Lightweight hydraulic actuator |
US7240607B2 (en) * | 2005-08-23 | 2007-07-10 | Polygon Company | Removable end plug |
-
2007
- 2007-09-10 US US11/852,942 patent/US20090068038A1/en not_active Abandoned
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1316417A (en) * | 1919-09-16 | Air-pump for pneumatic tires | ||
US817538A (en) * | 1904-07-01 | 1906-04-10 | Howard Wixon | Compound air-pump. |
US1330266A (en) * | 1919-05-06 | 1920-02-10 | Michael B Holstein | Pump |
US1424928A (en) * | 1921-05-14 | 1922-08-08 | Charles S Mcclelland | Pump |
US1801395A (en) * | 1928-04-30 | 1931-04-21 | Frigidaire Corp | Pump for refrigerating apparatus |
US2419775A (en) * | 1944-07-03 | 1947-04-29 | Woodruff & Edwards Inc | Pump |
US2469328A (en) * | 1944-07-20 | 1949-05-03 | Andrew Corp | Dry-air pump |
US2985359A (en) * | 1956-06-29 | 1961-05-23 | Robert H Hunter | Hand pump |
US3005669A (en) * | 1959-10-23 | 1961-10-24 | Galland Henning Mfg Company | Fluid pressure cylinder |
US3319577A (en) * | 1965-02-25 | 1967-05-16 | Margrete L Stinnes | Sliding seal and valve for reciprocating pump plunger |
US3964572A (en) * | 1975-03-03 | 1976-06-22 | Gannon Peter F | Adjustable safety ladder for above-the-ground swimming pools |
US4878419A (en) * | 1988-06-27 | 1989-11-07 | Allied-Signal Inc. | Lightweight hydraulic actuator |
US7240607B2 (en) * | 2005-08-23 | 2007-07-10 | Polygon Company | Removable end plug |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102852766A (en) * | 2011-06-30 | 2013-01-02 | 双馀实业有限公司 | Piston rod fixing device of inflating pump |
CN103807137A (en) * | 2012-11-06 | 2014-05-21 | 双馀实业有限公司 | Inflator with grip capable of being folded |
US20220228584A1 (en) * | 2021-01-20 | 2022-07-21 | Scott Wu | Easy-to-assemble air pump |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |