US20030068234A1 - Pump provided with diaphragms - Google Patents
Pump provided with diaphragms Download PDFInfo
- Publication number
- US20030068234A1 US20030068234A1 US10/266,568 US26656802A US2003068234A1 US 20030068234 A1 US20030068234 A1 US 20030068234A1 US 26656802 A US26656802 A US 26656802A US 2003068234 A1 US2003068234 A1 US 2003068234A1
- Authority
- US
- United States
- Prior art keywords
- diaphragms
- hole
- pump
- fitting hole
- rotator
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
Definitions
- the present invention relates to a pump provided with diaphragms, and more particularly to a compact pump which is used for a sphygmomanometer or the like.
- FIG. 3 A related-art compact pump of this type (disclosed in Japanese Patent Publication No. 2002-106471A) is now described with reference to FIGS. 3 to 4 B.
- a compact pump 1 is provided with two diaphragms 4 for defining pump chambers 3 in a casing 2 which has a rectangular shape in a plan view.
- Hollow fitting members 5 are provided at respective center parts on a lower face of the diaphragms 4 so as to project downward from the diaphragms 4 , and there is arranged, below the diaphragms 4 , a pivotable member 6 which is adapted to move the lower faces of the diaphragms 4 up and down.
- the casing 2 is composed of three steps, namely, an upper case 2 a , an intermediate case 2 b , and a lower case 2 c , and the diaphragms 4 are held in the casing 2 in such a manner that flange portions 4 a of the diaphragms 4 are clamped between the upper case 2 a and the intermediate case 2 b.
- shaft bodies 7 having intake holes 7 a are provided on the pivotable member 6 in the vicinity of its outer peripheral ends and positioned below the respective center part of the diaphragms 4 so as to project upwardly.
- the diaphragms 4 are partly cut in the respective center parts of their bottoms in order to form air intake valve bodies 8 , and there are formed through holes 9 by the cut.
- the through holes 9 can be opened or closed by the air intake valve bodies 8 , thus constituting air intake valve sections V 1 .
- a vent hole 10 is formed in a center part of the upper case 2 a , and two annular concave grooves 11 which open downward and communicate with the vent hole 10 are provided on a lower face of the upper case 2 a at an outer circumference of the vent hole 10 .
- Vent valve bodies 12 consisting of upper end portions of the diaphragms 4 are fitted by pressure to inner wall faces 11 a of the annular concave grooves 11 , thus constituting vent valve sections V 2 .
- An eccentric rotation shaft 13 pierces through a center part of the pivotable member 6 .
- An extended portion 14 which is extended from the intermediate case 2 b is provided above the pivotable member 6 , and a V-shaped recess 15 which opens downward is formed in a lower part of the extended portion 14 .
- An upper end portion of the eccentric rotation shaft 13 is loosely fitted in the recess 15 so as to swing freely therein.
- a rotary body 17 is fixed to an upper end of a rotary drive shaft 16 which is rotatably supported in an upright manner at a center of a lower part of the lower case 2 c , and there is formed, as shown in FIGS.
- a hole 18 in a columnar shape having a determined diameter and a determined depth on an upper face of the rotary body 17 at a position eccentric from its center position.
- a lower end portion of the eccentric rotation shaft 13 is loosely fitted into the hole 18 so as to swing freely therein.
- a motor casing 20 which contains a motor 19 connected to the rotary drive shaft 16 is directly connected to the lower case 2 c .
- the lower case 2 c is provided with a communicating hole 21 which communicates with the motor casing 20 , and in addition, air intake holes 22 are formed in a lower part of the motor casing 20 for introducing outside air into the motor casing 20 .
- the lower case 2 c of the compact pump is formed of transparent material so that a worker can insert the eccentric rotation shaft 13 into the hole 18 while confirming the hole 18 from outside of the lower case 2 c .
- the working efficiency is poor, but also the cost has become high because different materials are employed for the lower case 2 c and the other upper and intermediate cases 2 a and 2 b.
- a pump comprising:
- a rotator having a fitting hole formed in one face eccentrically from a rotation center of rotator;
- a groove portion having slopes extending from a vicinity of the rotation center toward the fitting hole is formed on the one face of the rotator while being inclined downwardly.
- a width of the groove portion is made narrower as closer to the fitting hole.
- the worker need not insert the end portion of the eccentric rotation shaft into the fitting hole while confirming the fitting hole as in the related-art pump, and the inserting operation can be automatically completed.
- the shaft member can be easily assembled and the working efficiency can be enhanced.
- FIG. 1 is a vertical sectional view of a compact pump showing one embodiment of the present invention
- FIG. 2A is a plan view of a rotary body in FIG. 1;
- FIG. 2B is a vertical sectional view of the rotary body in FIG. 1;
- FIG. 3 is a vertical sectional view of a related-art compact pump
- FIG. 4A is a plan view of a rotary body in FIG. 3;
- FIG. 4B is a vertical sectional view of the rotary body in FIG. 3.
- FIG. 1 a compact pump 23 is provided with a rotary body 24 in place of a rotary body ( 17 in FIG. 3) provided in the related-art compact pump ( 1 in FIG. 3).
- the rotary body 24 is eccentrically provided with a hole 25 in place of the hole ( 18 in FIG. 3) in the related-art compact pump.
- the rotary body 24 has a hole 25 in a columnar shape, as shown in FIG. 2, in place of the hole ( 18 in FIG. 3) in the related-art pump, and an entrance edge of the hole 25 is chamfered to form a guide inlet 26 .
- a guide groove 27 which inclines downwardly from the vicinity of the center of the rotary body 24 toward the hole 25 while narrowing the width thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
In a pump, a plurality of pump chambers are defined by a plurality of diaphragms. A pivotable member is attached to the diaphragms. A rotator has a fitting hole formed in one face eccentrically from a rotation center of rotator. A shaft member is inserted into the fitting hole to connect the pivotable member and the rotator. An entrance edge of the fitting hole is chamfered.
Description
- The present invention relates to a pump provided with diaphragms, and more particularly to a compact pump which is used for a sphygmomanometer or the like.
- A related-art compact pump of this type (disclosed in Japanese Patent Publication No. 2002-106471A) is now described with reference to FIGS.3 to 4B. In FIG. 3, a compact pump 1 is provided with two
diaphragms 4 for definingpump chambers 3 in acasing 2 which has a rectangular shape in a plan view.Hollow fitting members 5 are provided at respective center parts on a lower face of thediaphragms 4 so as to project downward from thediaphragms 4, and there is arranged, below thediaphragms 4, a pivotable member 6 which is adapted to move the lower faces of thediaphragms 4 up and down. Thecasing 2 is composed of three steps, namely, an upper case 2 a, an intermediate case 2 b, and a lower case 2 c, and thediaphragms 4 are held in thecasing 2 in such a manner thatflange portions 4 a of thediaphragms 4 are clamped between the upper case 2 a and the intermediate case 2 b. - Moreover,
shaft bodies 7 having intake holes 7 a are provided on the pivotable member 6 in the vicinity of its outer peripheral ends and positioned below the respective center part of thediaphragms 4 so as to project upwardly. By tightly fitting inner faces of thehollow fitting members 5 provided on thediaphragms 4 to outer faces of theseshaft members 7, thediaphragms 4 can be mounted to the pivotable member 6. - The
diaphragms 4 are partly cut in the respective center parts of their bottoms in order to form airintake valve bodies 8, and there are formed through holes 9 by the cut. The through holes 9 can be opened or closed by the airintake valve bodies 8, thus constituting air intake valve sections V1. - Further, a
vent hole 10 is formed in a center part of the upper case 2 a, and two annularconcave grooves 11 which open downward and communicate with thevent hole 10 are provided on a lower face of the upper case 2 a at an outer circumference of thevent hole 10.Vent valve bodies 12 consisting of upper end portions of thediaphragms 4 are fitted by pressure to inner wall faces 11 a of the annularconcave grooves 11, thus constituting vent valve sections V2. - An eccentric rotation shaft13 pierces through a center part of the pivotable member 6. An extended
portion 14 which is extended from the intermediate case 2 b is provided above the pivotable member 6, and a V-shaped recess 15 which opens downward is formed in a lower part of the extendedportion 14. An upper end portion of theeccentric rotation shaft 13 is loosely fitted in therecess 15 so as to swing freely therein. On the other hand, arotary body 17 is fixed to an upper end of arotary drive shaft 16 which is rotatably supported in an upright manner at a center of a lower part of the lower case 2 c, and there is formed, as shown in FIGS. 4A and 4B, ahole 18 in a columnar shape having a determined diameter and a determined depth on an upper face of therotary body 17 at a position eccentric from its center position. A lower end portion of theeccentric rotation shaft 13 is loosely fitted into thehole 18 so as to swing freely therein. - A
motor casing 20 which contains amotor 19 connected to therotary drive shaft 16 is directly connected to the lower case 2 c. The lower case 2 c is provided with a communicatinghole 21 which communicates with themotor casing 20, and in addition,air intake holes 22 are formed in a lower part of themotor casing 20 for introducing outside air into themotor casing 20. - In this state, when the
rotary drive shaft 16 is driven by themotor 19 to rotate and therotary body 17 is rotated, theeccentric rotation shaft 13 is caused to rock inside thehole 18, resulting in an eccentric rotation. This will cause a pivoting motion of the pivotable member 6 thereby to move the lower end portions of thediaphragms 4 up and down. When the lower end portion of one of thediaphragms 4, for example, is moved downward, negative pressure is generated inside thediaphragm 4, and thevent valve body 12 will be tightly fitted to theinner wall face 11 a of the annularconcave groove 11. In other words, the vent valve section V2 is closed, and the airintake valve body 8 opens the through hole 9. In this manner, the air intake valve section V1 is shifted into an open state, and air is introduced from the intake hole 7 a into thediaphragm 4, as shown by an arrow C. - Then, when the lower end portion of the
diaphragm 4 is moved upward, high pressure will be generated in thediaphragm 4, and the airintake valve body 8 closes the through hole 9, shifting the air intake valve section V1 into a closed state. At the same time, thevent valve body 12 is enlarged in diameter so as to depart from theinner wall face 11 a, and the air is exhausted through the vent valve section V2, as shown by an arrow D. Specifically, the air exhausted from thevent valve body 12 passes the annularconcave groove 11 and exhausted from thevent hole 10 to the exterior of thecasing 2. - Also with the upward movement of the
diaphragm 4, negative pressure will be generated in the lower case 2 c, and the air existing in themotor casing 20 flows into the lower case via thecommunication hole 21, as shown by an arrow E. This generates negative pressure inside themotor casing 20, and the outside air is introduced into themotor casing 20 via theair intake hole 22, as shown by an arrow F. - In the compact pump, since the
hole 18 is formed in a columnar shape having a relatively small diameter in therotary body 17 eccentrically, it is difficult to insert the lower end portion of theeccentric rotation shaft 13 when they are assembled. - Further, in order to facilitate the inserting operation, the lower case2 c of the compact pump is formed of transparent material so that a worker can insert the
eccentric rotation shaft 13 into thehole 18 while confirming thehole 18 from outside of the lower case 2 c. Hence, not only the working efficiency is poor, but also the cost has become high because different materials are employed for the lower case 2 c and the other upper and intermediate cases 2 a and 2 b. - It is therefore an object of the invention to provide a pump provided with diaphragms, which is able to facilitate the assembling operation of the eccentric rotation shaft to improve the operation efficiency.
- In order to achieve the above object, according to the present invention, there is provided a pump, comprising:
- a plurality of diaphragms, which define a plurality of pump chambers;
- a pivotable member, attached to the diaphragms;
- a rotator, having a fitting hole formed in one face eccentrically from a rotation center of rotator; and
- a shaft member, inserted into the fitting hole to connect the pivotable member and the rotator,
- wherein an entrance edge of the fitting hole is chamfered.
- Preferably, a groove portion having slopes extending from a vicinity of the rotation center toward the fitting hole is formed on the one face of the rotator while being inclined downwardly.
- Here, it is preferable that a width of the groove portion is made narrower as closer to the fitting hole.
- In the above configurations, when the shaft member is assembled, the one end portion of the shaft member will be guided by the chamfered portion and the guide groove to be introduced into the fitting hole.
- Therefore, the worker need not insert the end portion of the eccentric rotation shaft into the fitting hole while confirming the fitting hole as in the related-art pump, and the inserting operation can be automatically completed. In this manner, the shaft member can be easily assembled and the working efficiency can be enhanced.
- The above objects and advantages of the present invention will become more apparent by describing in detail preferred exemplary embodiments thereof with reference to the accompanying drawings, wherein:
- FIG. 1 is a vertical sectional view of a compact pump showing one embodiment of the present invention;
- FIG. 2A is a plan view of a rotary body in FIG. 1;
- FIG. 2B is a vertical sectional view of the rotary body in FIG. 1;
- FIG. 3 is a vertical sectional view of a related-art compact pump;
- FIG. 4A is a plan view of a rotary body in FIG. 3; and
- FIG. 4B is a vertical sectional view of the rotary body in FIG. 3.
- One embodiment of the present invention will be described in detail referring to FIGS. 1 and 2. It is to be noted that for convenience of explanation, the same components as those of the related-art compact pump will be denoted in the drawings with the same reference numerals, and explanation of the components will be omitted. In FIG. 1, a
compact pump 23 is provided with arotary body 24 in place of a rotary body (17 in FIG. 3) provided in the related-art compact pump (1 in FIG. 3). Therotary body 24 is eccentrically provided with ahole 25 in place of the hole (18 in FIG. 3) in the related-art compact pump. - The
rotary body 24 has ahole 25 in a columnar shape, as shown in FIG. 2, in place of the hole (18 in FIG. 3) in the related-art pump, and an entrance edge of thehole 25 is chamfered to form aguide inlet 26. In addition, there is formed aguide groove 27 which inclines downwardly from the vicinity of the center of therotary body 24 toward thehole 25 while narrowing the width thereof. - Accordingly, when the
eccentric rotation shaft 13 is assembled to therotary body 24, in a state where theeccentric rotation shaft 13 is held by the upper case 2 a and the intermediate case 2 b together with the pivotable member 6 and thediaphragms 4, and therotary drive shaft 16 is pivotally supported by the lower case 2 c. The upper case 2 a and the intermediate case 2 b are moved close to the lower case 2 c to be engaged with each other. Then, the lower end portion of theeccentric rotation shaft 13 is brought near to the center of therotary body 24, and guided by theguide groove 27 and theguide inlet 26 to be introduced and inserted into thehole 25. - Therefore, a worker need not insert the lower end portion of the
eccentric rotation shaft 13 into thehole 25 while confirming thehole 25 as in the related-art pump, and theeccentric rotation shaft 13 can be automatically inserted. This enables the eccentric rotation shaft to be easily assembled, and the working efficiency can be enhanced. - In this state, when the
rotary body 24 is rotated with the rotation of themotor 19, the lower end portion of theeccentric rotation shaft 13 will be pivoted inside thehole 25 resulting in an eccentric rotation. This will cause the pivoting motion of the pivotable member 6 thereby to move the lower end portions of thediaphragms 4 up and down. When the lower end portion of one of thediaphragms 4, for example, is moved downward, negative pressure is generated inside thediaphragm 4, and thevent valve body 12 is tightly fitted to the inner wall face 11 a of the annularconcave groove 11. In this manner, the vent valve section V2 is closed, and the airintake valve body 8 opens the through hole 9. In other words, the air intake valve section V1 is shifted into an open state, and air is introduced from the intake hole 7 a into thediaphragm 4, as shown by the arrow C. - Then, when the lower end portion of the
diaphragm 4 is moved upward, high pressure is generated in thediaphragm 4, and the airintake valve body 8 closes the through hole 9, shifting the air intake valve section V1 into a closed state. At the same time, thevent valve body 12 is enlarged in diameter so as to depart from the inner wall face 11 a, and the air is exhausted through the vent valve section V2, as shown by the arrow D. Specifically, the air exhausted from thevent valve body 12 passes the annularconcave groove 11 and exhausted from thevent hole 10 to the exterior of thecasing 2. - Also with the upward movement of the
diaphragm 4, negative pressure is generated in the lower case 2 c, and the air existing in themotor casing 20 flows into the lower case 2 c via thecommunication hole 21, as shown by the arrow E. This generates negative pressure inside themotor casing 20, and the outside air is introduced into themotor casing 20 via theair intake hole 22, as shown by the arrow F. - Although the present invention has been shown and described with reference to specific preferred embodiments, various changes and modifications will be apparent to those skilled in the art from the teachings herein. Such changes and modifications as are obvious are deemed to come within the spirit, scope and contemplation of the invention as defined in the appended claims.
Claims (3)
1. A pump, comprising:
a plurality of diaphragms, which define a plurality of pump chambers;
a pivotable member, attached to the diaphragms;
a rotator, having a fitting hole formed in one face eccentrically from a rotation center of rotator; and
a shaft member, inserted into the fitting hole to connect the pivotable member and the rotator,
wherein an entrance edge of the fitting hole is chamfered.
2. The pump as set forth in claim 1 , wherein a groove portion having slopes extending from a vicinity of the rotation center toward the fitting hole is formed on the one face of the rotator while being inclined downwardly.
3. The pump as set forth in claim 2 , wherein a width of the groove portion is made narrower as closer to the fitting hole.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001312646A JP2003120521A (en) | 2001-10-10 | 2001-10-10 | Small pump |
JPP2001-312646 | 2001-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030068234A1 true US20030068234A1 (en) | 2003-04-10 |
Family
ID=19131265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/266,568 Abandoned US20030068234A1 (en) | 2001-10-10 | 2002-10-09 | Pump provided with diaphragms |
Country Status (3)
Country | Link |
---|---|
US (1) | US20030068234A1 (en) |
JP (1) | JP2003120521A (en) |
DE (1) | DE10247292A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070140879A1 (en) * | 2005-12-16 | 2007-06-21 | Tricore Corporation | Air pump with improved air intake control structure |
CN100387838C (en) * | 2005-09-23 | 2008-05-14 | 章年平 | Minisize air lift pump with low power consumption air guide structure |
CN100436812C (en) * | 2005-09-23 | 2008-11-26 | 章年平 | Minisize pneumatic pump with low power consumption |
WO2009015528A1 (en) * | 2007-07-30 | 2009-02-05 | Fulling & Ceiec Co., Ltd. | A membrane pump |
US20120315166A1 (en) * | 2011-06-10 | 2012-12-13 | Wan Hor Looi | Diaphragm pump |
US20170156550A1 (en) * | 2015-12-04 | 2017-06-08 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
WO2018051261A1 (en) * | 2016-09-14 | 2018-03-22 | Kavan Novin Energy Paydar Group | A multistage compressor |
US9943196B2 (en) | 2015-11-12 | 2018-04-17 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10065199B2 (en) | 2015-11-13 | 2018-09-04 | Gojo Industries, Inc. | Foaming cartridge |
US10080467B2 (en) | 2015-11-20 | 2018-09-25 | Gojo Industries, Inc. | Foam dispensing systems, pumps and refill units having high air to liquid ratios |
US10080466B2 (en) | 2015-11-18 | 2018-09-25 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10143339B2 (en) | 2016-04-06 | 2018-12-04 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10912426B2 (en) | 2016-04-06 | 2021-02-09 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US11000161B2 (en) | 2016-02-11 | 2021-05-11 | Gojo Industries, Inc. | High quality non-aerosol hand sanitizing foam |
CN113685334A (en) * | 2020-12-15 | 2021-11-23 | 深圳市桑泰达科技有限公司 | Efficient gas transmission structure and corresponding miniature air pump |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9453504B2 (en) | 2011-07-11 | 2016-09-27 | Okenseiko Co., Ltd. | Diaphragm pump |
JP5715990B2 (en) * | 2012-07-04 | 2015-05-13 | 多田プラスチック工業株式会社 | Diaphragm pump |
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US4486151A (en) * | 1981-05-13 | 1984-12-04 | Korhonen Wesala Veikko | Diaphragm pump |
US4507058A (en) * | 1983-12-20 | 1985-03-26 | Carr-Griff, Inc. | Wobble plate pump and drive mechanism therefor |
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US5332370A (en) * | 1992-04-23 | 1994-07-26 | Matsushita Electric Works, Ltd. | Miniature diaphragm pump |
US6006647A (en) * | 1998-05-08 | 1999-12-28 | Tuboscope I/P Inc. | Actuator with free-floating piston for a blowout preventer and the like |
US6158971A (en) * | 1998-02-02 | 2000-12-12 | Ohken Seiko Co., Ltd. | Pump |
US6206664B1 (en) * | 1999-05-11 | 2001-03-27 | Okenseiko Co., Ltd. | Compact pump |
US6340275B1 (en) * | 1999-01-08 | 2002-01-22 | Toyota Jidosha Kabushiki Kaisha | Chamfering method |
US6506033B2 (en) * | 2000-10-26 | 2003-01-14 | Okenseiko Co., Ltd. | Miniature pump with ball-plate drive |
-
2001
- 2001-10-10 JP JP2001312646A patent/JP2003120521A/en active Pending
-
2002
- 2002-10-09 US US10/266,568 patent/US20030068234A1/en not_active Abandoned
- 2002-10-10 DE DE10247292A patent/DE10247292A1/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US4486151A (en) * | 1981-05-13 | 1984-12-04 | Korhonen Wesala Veikko | Diaphragm pump |
US4507058A (en) * | 1983-12-20 | 1985-03-26 | Carr-Griff, Inc. | Wobble plate pump and drive mechanism therefor |
US4801249A (en) * | 1986-06-09 | 1989-01-31 | Ohken Seiko Co., Ltd. | Small-sized pump |
US4930997A (en) * | 1987-08-19 | 1990-06-05 | Bennett Alan N | Portable medical suction device |
US5332370A (en) * | 1992-04-23 | 1994-07-26 | Matsushita Electric Works, Ltd. | Miniature diaphragm pump |
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US6006647A (en) * | 1998-05-08 | 1999-12-28 | Tuboscope I/P Inc. | Actuator with free-floating piston for a blowout preventer and the like |
US6340275B1 (en) * | 1999-01-08 | 2002-01-22 | Toyota Jidosha Kabushiki Kaisha | Chamfering method |
US6206664B1 (en) * | 1999-05-11 | 2001-03-27 | Okenseiko Co., Ltd. | Compact pump |
US6506033B2 (en) * | 2000-10-26 | 2003-01-14 | Okenseiko Co., Ltd. | Miniature pump with ball-plate drive |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100387838C (en) * | 2005-09-23 | 2008-05-14 | 章年平 | Minisize air lift pump with low power consumption air guide structure |
CN100436812C (en) * | 2005-09-23 | 2008-11-26 | 章年平 | Minisize pneumatic pump with low power consumption |
US7819636B2 (en) * | 2005-12-16 | 2010-10-26 | Tricore Corporation | Air pump with improved air intake control structure |
US20070140879A1 (en) * | 2005-12-16 | 2007-06-21 | Tricore Corporation | Air pump with improved air intake control structure |
WO2009015528A1 (en) * | 2007-07-30 | 2009-02-05 | Fulling & Ceiec Co., Ltd. | A membrane pump |
US20120315166A1 (en) * | 2011-06-10 | 2012-12-13 | Wan Hor Looi | Diaphragm pump |
US9217425B2 (en) * | 2011-06-10 | 2015-12-22 | Johnson Electric S.A. | Diaphragm pump with inlet pathways passing through mounting holes |
US9943196B2 (en) | 2015-11-12 | 2018-04-17 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10065199B2 (en) | 2015-11-13 | 2018-09-04 | Gojo Industries, Inc. | Foaming cartridge |
US10080466B2 (en) | 2015-11-18 | 2018-09-25 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10080467B2 (en) | 2015-11-20 | 2018-09-25 | Gojo Industries, Inc. | Foam dispensing systems, pumps and refill units having high air to liquid ratios |
US10080468B2 (en) * | 2015-12-04 | 2018-09-25 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US20170156550A1 (en) * | 2015-12-04 | 2017-06-08 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US11000161B2 (en) | 2016-02-11 | 2021-05-11 | Gojo Industries, Inc. | High quality non-aerosol hand sanitizing foam |
US10143339B2 (en) | 2016-04-06 | 2018-12-04 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10912426B2 (en) | 2016-04-06 | 2021-02-09 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US11596273B2 (en) | 2016-04-06 | 2023-03-07 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
WO2018051261A1 (en) * | 2016-09-14 | 2018-03-22 | Kavan Novin Energy Paydar Group | A multistage compressor |
CN113685334A (en) * | 2020-12-15 | 2021-11-23 | 深圳市桑泰达科技有限公司 | Efficient gas transmission structure and corresponding miniature air pump |
Also Published As
Publication number | Publication date |
---|---|
DE10247292A1 (en) | 2003-05-22 |
JP2003120521A (en) | 2003-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MITSUMI ELECTRIC CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHINDO, YASUSHI;REEL/FRAME:013374/0192 Effective date: 20020924 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |