US20140271291A1 - Air pump - Google Patents
Air pump Download PDFInfo
- Publication number
- US20140271291A1 US20140271291A1 US13/844,849 US201313844849A US2014271291A1 US 20140271291 A1 US20140271291 A1 US 20140271291A1 US 201313844849 A US201313844849 A US 201313844849A US 2014271291 A1 US2014271291 A1 US 2014271291A1
- Authority
- US
- United States
- Prior art keywords
- base
- adjusting rod
- outlet device
- main frame
- pressure cylinder
- 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
Links
Images
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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- 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
-
- 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
Definitions
- the present invention relates to an air pump, and more particularly relates to an air pump that has a pressure relief device to provide a pressure relief effect to the air pump and can be operated conveniently.
- a conventional air pump has a main frame 90 , two pressure cylinders 91 , a footboard 93 , an outlet device 95 , and a pressure relief device 80 .
- the pressure cylinders 91 are mounted in the main frame 90 , and each pressure cylinder has a cylinder 92 and a cylinder axis extending out of the cylinder 92 .
- the footboard 93 is pivotally connected to the main frame 90 and has two side panels 94 .
- the outlet device 95 is connected to and communicates with the pressure cylinders 91 and has a side face and a check valve mounted in the outlet device 95 .
- the pressure relief device 80 is mounted on the outlet device 95 near the check valve and has a base 81 , a ball 82 and an adjusting rod 83 .
- the base 81 is mounted on the side face of the outlet device 95 and has a leaking channel communicating with the outlet device 95 and an inner thread 85 formed in the leaking channel.
- the ball 82 is mounted in the leaking channel of the base 81 .
- the adjusting rod 83 is connected to the base 81 and has a head 86 and a body 87 formed on and protruding from the head 86 .
- the body 87 abuts the ball 82 and has an external surface and an outer thread 88 formed around the external surface of the body 87 .
- the outer thread 88 of the body 87 is screwed with the inner thread 85 of the base 81 to enable the adjusting rod 83 to rotate and to move relative to the base 81 .
- a distance D1 is defined between the head 86 of the adjusting rod 83 and a corresponding side panel 94 that faces to the head 86 of the adjusting rod 83
- a length of the adjusting rod 83 that extends into the base 81 is defined as D2.
- the distance D1 between the head 86 and the corresponding side panel 94 is longer than the length D2 of the adjusting rod that extends in the base 81 . Consequently, the adjusting rod 83 may be separated from the base 81 during the pressure relief process and this is inconvenient in use.
- the invention provides an air pump to mitigate or obviate the aforementioned problems.
- the main objective of the present invention is to provide an air pump that has a pressure relief device to provide a pressure relief effect to the air pump and can be operated conveniently.
- the air pump in accordance with the present invention has a main frame, a first pressure cylinder, a second pressure cylinder, an outlet device, a footboard, and a pressure relief device.
- the outlet device is connected to and communicates with the pressure cylinders.
- the footboard is pivotally connected to the main frame, is securely connected to the pressure cylinders, and has two side panels and a limiting board.
- the pressure relief device is mounted on the outlet device near the first pressure cylinder and has a base, a ball, an adjusting rod, and an anti-slip-off element.
- the base is securely mounted on the side face of the outlet device that faces the limiting board and has a leaking channel. A distance of the adjusting rod that extends into the leaking channel of the base is longer than a distance that is defined between the limiting board and the anti-slip-off element.
- FIG. 1 is a perspective view of an air pump in accordance with the present invention
- FIG. 2 is a bottom view of the air pump in FIG. 1 ;
- FIG. 3 is a side view of the air pump in FIG. 1 ;
- FIG. 4 is an enlarged bottom view in partial section of the air pump across line 4 - 4 in FIG. 3 ;
- FIG. 5 is a top view of an air pump in accordance with the prior art
- FIG. 6 is a side view of the air pump in FIG. 5 ;
- FIG. 7 is an enlarged bottom view in partial section of the air pump across line 7 - 7 in FIG. 6 .
- an air pump in accordance with the present invention comprises a main frame 10 , a first pressure cylinder 11 , a second pressure cylinder 12 , an outlet device 13 , a footboard 20 , and a pressure relief device 30 .
- the main frame 10 has a front end and a rear end.
- the pressure cylinders 11 , 12 are movably mounted in the main frame 10 at an interval and are parallel with each other, and each pressure cylinder 11 , 12 has a connecting end and an outlet end.
- the connecting ends of the pressure cylinders 11 , 12 are securely connected to the main frame 10 proximal to the rear end of the main frame 10 .
- the outlet device 13 is connected to and communicates with the outlet ends of the pressure cylinders 11 , 12 near the front end of the main frame 10 , and has two side faces and a check valve 14 mounted in the outlet device 13 near the first pressure cylinder 11 as shown in FIG. 4 .
- the footboard 20 is pivotally connected to the main frame 10 , is securely connected to the pressure cylinders 11 , 12 by a shaft, and has two side panels 21 and a limiting board 22 .
- the side panels 21 are pivotally connected to the front end of the main frame 10 , the side panels 21 each respectively face the pressure cylinders 11 , 12 and also respectively face the side faces of the outlet device 13 , and each side panel 21 has an inner surface.
- the limiting board 22 is mounted on the inner surface of a corresponding side panel 21 that faces the first pressure cylinder 11 to face a corresponding side face of the outlet device 13 .
- the pressure relief device 30 is mounted on the outlet device 13 near the first pressure cylinder 11 , and has a base 31 , a ball 32 , an adjusting rod 33 and an anti-slip-off element 34 .
- the base 31 is securely mounted on the side face of the outlet device 13 that faces the limiting board 22 , and has a leaking channel and an inner thread 35 .
- the leaking channel is formed through the base 31 , communicates with the outlet device 13 and has an internal surface.
- the inner thread 35 is formed around the internal surface of the leaking channel.
- the ball 32 is mounted in the leaking channel of the base 31 .
- the adjusting rod 33 is movably mounted in the leaking channel of the base 31 and has an inner end, an outer end, a head 36 and a body 37 .
- the inner end of the adjusting rod 33 is mounted in the leaking channel of the base 31 .
- the outer end of the adjusting rod 33 extends out of the base 31 and faces the limiting board 22 .
- the head 36 is formed on and protrudes from the outer end of the adjusting rod 33 .
- the body 37 is formed on the inner end of the adjusting rod 33 , is formed with the head 36 , and has an external surface and an outer thread 38 .
- the outer thread 38 is formed around the external surface of the body 37 and is screwed with the inner thread 35 of the base 31 .
- a length of the adjusting rod 33 that extends into the leaking channel of the base 31 is defined as L1.
- the anti-slip-off element 34 may be a cap, is securely mounted around the head 36 of the adjusting rod 33 , and has an outer side facing the limiting board 22 . Furthermore, a distance between the limiting board 22 and the outer side of the anti-slip-off element 34 is defined as L2. In the present invention, the length L1 is longer than the distance L2.
- a user can rotate the anti-slip-off element 34 relative to the outlet device 13 , and the adjusting rod 33 is rotated with the anti-slip-off element 34 relative to the base 31 . Then, the body 37 of the adjusting rod 33 can be moved out of the base 31 .
- the outer thread 38 of the body 37 of the adjusting rod 33 is still screwed with the inner thread 35 the base 31 because the distance L2 between the anti-slip-off element 34 and the limiting board 22 is shorter than the length L1 of the adjusting rod 33 that extends into the base 31 . Accordingly, the adjusting rod 33 will not be over-rotated and separated from the base 31 during the pressure relief process.
- the air pump in accordance with the present invention can prevent the adjusting rod 33 from being over-rotated during the pressure relief process by the limitation between the distance L2 and the length L1. Then, the outer thread 38 of the adjusting rod 31 is still screwed with the inner thread 35 of the base 31 to prevent the adjusting rod 31 from being separated from the base 31 and this is convenient in use.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
An air pump has a main frame, a first pressure cylinder, a second pressure cylinder, an outlet device, a footboard, and a pressure relief device. The outlet device is connected to and communicates with the pressure cylinders. The footboard is pivotally connected to the main frame, is securely connected to the pressure cylinders, and has two side panels and a limiting board. The pressure relief device is mounted on the outlet device near the first pressure cylinder and has a base, a ball, an adjusting rod, and an anti-slip-off element. The base is securely mounted on the side face of the outlet device that faces the limiting board, and has a leaking channel. A length of the adjusting rod that extends into the leaking channel of the base is longer than a distance that is defined between the limiting board and the anti-slip-off element.
Description
- 1. Field of the Invention
- The present invention relates to an air pump, and more particularly relates to an air pump that has a pressure relief device to provide a pressure relief effect to the air pump and can be operated conveniently.
- 2. Description of Related Art
- With reference to
FIGS. 5 to 7 , a conventional air pump has amain frame 90, twopressure cylinders 91, afootboard 93, anoutlet device 95, and apressure relief device 80. Thepressure cylinders 91 are mounted in themain frame 90, and each pressure cylinder has acylinder 92 and a cylinder axis extending out of thecylinder 92. Thefootboard 93 is pivotally connected to themain frame 90 and has twoside panels 94. Theoutlet device 95 is connected to and communicates with thepressure cylinders 91 and has a side face and a check valve mounted in theoutlet device 95. - The
pressure relief device 80 is mounted on theoutlet device 95 near the check valve and has a base 81, aball 82 and an adjustingrod 83. The base 81 is mounted on the side face of theoutlet device 95 and has a leaking channel communicating with theoutlet device 95 and aninner thread 85 formed in the leaking channel. Theball 82 is mounted in the leaking channel of the base 81. The adjustingrod 83 is connected to the base 81 and has ahead 86 and abody 87 formed on and protruding from thehead 86. Thebody 87 abuts theball 82 and has an external surface and anouter thread 88 formed around the external surface of thebody 87. Theouter thread 88 of thebody 87 is screwed with theinner thread 85 of the base 81 to enable the adjustingrod 83 to rotate and to move relative to the base 81. - With reference to
FIG. 7 , when a user rotates the adjustingrod 83 to loosen the adjustingrod 83 from the base 81 during a pressure relief process, a distance D1 is defined between thehead 86 of the adjustingrod 83 and acorresponding side panel 94 that faces to thehead 86 of the adjustingrod 83, and a length of the adjustingrod 83 that extends into the base 81 is defined as D2. The distance D1 between thehead 86 and thecorresponding side panel 94 is longer than the length D2 of the adjusting rod that extends in the base 81. Consequently, the adjustingrod 83 may be separated from the base 81 during the pressure relief process and this is inconvenient in use. - The invention provides an air pump to mitigate or obviate the aforementioned problems.
- The main objective of the present invention is to provide an air pump that has a pressure relief device to provide a pressure relief effect to the air pump and can be operated conveniently.
- The air pump in accordance with the present invention has a main frame, a first pressure cylinder, a second pressure cylinder, an outlet device, a footboard, and a pressure relief device. The outlet device is connected to and communicates with the pressure cylinders. The footboard is pivotally connected to the main frame, is securely connected to the pressure cylinders, and has two side panels and a limiting board. The pressure relief device is mounted on the outlet device near the first pressure cylinder and has a base, a ball, an adjusting rod, and an anti-slip-off element. The base is securely mounted on the side face of the outlet device that faces the limiting board and has a leaking channel. A distance of the adjusting rod that extends into the leaking channel of the base is longer than a distance that is defined between the limiting board and the anti-slip-off element.
- Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a perspective view of an air pump in accordance with the present invention; -
FIG. 2 is a bottom view of the air pump inFIG. 1 ; -
FIG. 3 is a side view of the air pump inFIG. 1 ; and -
FIG. 4 is an enlarged bottom view in partial section of the air pump across line 4-4 inFIG. 3 ; -
FIG. 5 is a top view of an air pump in accordance with the prior art; -
FIG. 6 is a side view of the air pump inFIG. 5 ; and -
FIG. 7 is an enlarged bottom view in partial section of the air pump across line 7-7 inFIG. 6 . - With reference to
FIGS. 1 to 3 , an air pump in accordance with the present invention comprises amain frame 10, afirst pressure cylinder 11, asecond pressure cylinder 12, anoutlet device 13, afootboard 20, and apressure relief device 30. - The
main frame 10 has a front end and a rear end. Thepressure cylinders main frame 10 at an interval and are parallel with each other, and eachpressure cylinder pressure cylinders main frame 10 proximal to the rear end of themain frame 10. - The
outlet device 13 is connected to and communicates with the outlet ends of thepressure cylinders main frame 10, and has two side faces and acheck valve 14 mounted in theoutlet device 13 near thefirst pressure cylinder 11 as shown inFIG. 4 . - The
footboard 20 is pivotally connected to themain frame 10, is securely connected to thepressure cylinders side panels 21 and a limitingboard 22. When thefootboard 20 is moved relative to themain frame 10, thepressure cylinders footboard 20 relative to themain frame 10. Theside panels 21 are pivotally connected to the front end of themain frame 10, theside panels 21 each respectively face thepressure cylinders outlet device 13, and eachside panel 21 has an inner surface. The limitingboard 22 is mounted on the inner surface of acorresponding side panel 21 that faces thefirst pressure cylinder 11 to face a corresponding side face of theoutlet device 13. - With further reference to
FIGS. 3 and 4 , thepressure relief device 30 is mounted on theoutlet device 13 near thefirst pressure cylinder 11, and has abase 31, aball 32, anadjusting rod 33 and an anti-slip-offelement 34. Thebase 31 is securely mounted on the side face of theoutlet device 13 that faces the limitingboard 22, and has a leaking channel and aninner thread 35. The leaking channel is formed through thebase 31, communicates with theoutlet device 13 and has an internal surface. Theinner thread 35 is formed around the internal surface of the leaking channel. Theball 32 is mounted in the leaking channel of thebase 31. - The adjusting
rod 33 is movably mounted in the leaking channel of thebase 31 and has an inner end, an outer end, ahead 36 and abody 37. The inner end of the adjustingrod 33 is mounted in the leaking channel of thebase 31. The outer end of the adjustingrod 33 extends out of thebase 31 and faces the limitingboard 22. Thehead 36 is formed on and protrudes from the outer end of the adjustingrod 33. Thebody 37 is formed on the inner end of the adjustingrod 33, is formed with thehead 36, and has an external surface and anouter thread 38. Theouter thread 38 is formed around the external surface of thebody 37 and is screwed with theinner thread 35 of thebase 31. In addition, a length of the adjustingrod 33 that extends into the leaking channel of thebase 31 is defined as L1. - The anti-slip-off
element 34 may be a cap, is securely mounted around thehead 36 of the adjustingrod 33, and has an outer side facing the limitingboard 22. Furthermore, a distance between the limitingboard 22 and the outer side of the anti-slip-offelement 34 is defined as L2. In the present invention, the length L1 is longer than the distance L2. - During a pressure relief process of the
pressure relief device 30 in accordance with the present invention, a user can rotate the anti-slip-offelement 34 relative to theoutlet device 13, and the adjustingrod 33 is rotated with the anti-slip-offelement 34 relative to thebase 31. Then, thebody 37 of the adjustingrod 33 can be moved out of thebase 31. When the adjustingrod 33 is rotated and is moved relative to thebase 31, theouter thread 38 of thebody 37 of the adjustingrod 33 is still screwed with theinner thread 35 thebase 31 because the distance L2 between the anti-slip-offelement 34 and the limitingboard 22 is shorter than the length L1 of the adjustingrod 33 that extends into thebase 31. Accordingly, the adjustingrod 33 will not be over-rotated and separated from the base 31 during the pressure relief process. - According to the above-mentioned features, the air pump in accordance with the present invention can prevent the adjusting
rod 33 from being over-rotated during the pressure relief process by the limitation between the distance L2 and the length L1. Then, theouter thread 38 of the adjustingrod 31 is still screwed with theinner thread 35 of the base 31 to prevent the adjustingrod 31 from being separated from thebase 31 and this is convenient in use. - Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (3)
1. An air pump comprising:
a main frame having a front end and a rear end;
a first pressure cylinder movably mounted in the main frame;
a second pressure cylinder movably mounted in the main frame and being parallel with the first pressure cylinder at an interval;
an outlet device connected to and communicating with the pressure cylinders near the front end of the main frame and having
two side faces; and
a check valve mounted in the outlet device near the first pressure cylinder:
a footboard pivotally connected to the main frame, securely connected to the pressure cylinders and having
two side panels pivotally connected to the front end of the main frame, the side panels each respectively facing the pressure cylinders and also each respectively facing the side faces of the outlet device, and each side panel having an inner surface; and
a limiting board mounted on the inner surface of a corresponding side panel that faces the first pressure cylinder, and facing a corresponding side face of the outlet device; and
a pressure relief device mounted on the outlet device near the first pressure cylinder and having
a base securely mounted on the side face of the outlet device that faces the limiting board, the base having a leaking channel formed through the base, communicating with the outlet device, and having an internal surface;
a ball mounted in the leaking channel of the base;
an adjusting rod movably mounted in the leaking channel of the base and having
an inner end mounted in the leaking channel of the base; and
an outer end extending out of the base and facing the limiting board;
an anti-slip-off element securely mounted around the outer end of the adjusting rod and having an outer side facing the limiting board; and
wherein a length of the adjusting rod that extends into the leaking channel of the base is longer than a distance that is defined between the limiting board and the outer side of the anti-slip-off element.
2. The air pump as claimed in claim 1 , wherein
the base has an inner thread formed around the internal surface of the leaking channel of the base; and
the adjusting rod has
a head formed on and protruding from the outer end of the adjusting rod; and
a body formed on the inner end of the adjusting rod, formed with the head, and having an external surface and an outer thread formed around the external surface of the body and screwed with the inner thread of the base.
3. The air pump as claimed in claim 2 , wherein the head of the adjusting rod is mounted in the anti-slip-off element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/844,849 US20140271291A1 (en) | 2013-03-16 | 2013-03-16 | Air pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/844,849 US20140271291A1 (en) | 2013-03-16 | 2013-03-16 | Air pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140271291A1 true US20140271291A1 (en) | 2014-09-18 |
Family
ID=51527774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/844,849 Abandoned US20140271291A1 (en) | 2013-03-16 | 2013-03-16 | Air pump |
Country Status (1)
Country | Link |
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US (1) | US20140271291A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11408408B2 (en) * | 2019-11-19 | 2022-08-09 | Scott Wu | Portable air pump including a piston movable relative to a cylinder provided with a first through-hole, a pivoting seat provided with a second through-hole, a connection member provided with a third through-hole, and a head seat provided with a fourth through-hole, wherein an axial member is mounted through the first through fourth through-holes |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5093959A (en) * | 1991-01-17 | 1992-03-10 | Masco Corporation Of Indiana | Faucet handle assembly |
US5769119A (en) * | 1996-09-27 | 1998-06-23 | The Lincoln Electric Company | Combined control and check valve for gas torches |
USD506761S1 (en) * | 2003-09-17 | 2005-06-28 | Michelin Recherche Et S.A. | Air pump |
-
2013
- 2013-03-16 US US13/844,849 patent/US20140271291A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5093959A (en) * | 1991-01-17 | 1992-03-10 | Masco Corporation Of Indiana | Faucet handle assembly |
US5769119A (en) * | 1996-09-27 | 1998-06-23 | The Lincoln Electric Company | Combined control and check valve for gas torches |
USD506761S1 (en) * | 2003-09-17 | 2005-06-28 | Michelin Recherche Et S.A. | Air pump |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11408408B2 (en) * | 2019-11-19 | 2022-08-09 | Scott Wu | Portable air pump including a piston movable relative to a cylinder provided with a first through-hole, a pivoting seat provided with a second through-hole, a connection member provided with a third through-hole, and a head seat provided with a fourth through-hole, wherein an axial member is mounted through the first through fourth through-holes |
US20220333587A1 (en) * | 2019-11-19 | 2022-10-20 | Scott Wu | Portable air pump |
US11713753B2 (en) * | 2019-11-19 | 2023-08-01 | Scott Wu | Portable air pump including a piston movable relative to a cylinder provided with an axial member mounted through a third through-hole, and a head seat provided with a fourth through-hole, wherein an axial member is mounted through the third and fourth through-holes |
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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 |