US20080044302A1 - Electromagnetic fuel pump - Google Patents
Electromagnetic fuel pump Download PDFInfo
- Publication number
- US20080044302A1 US20080044302A1 US11/604,335 US60433506A US2008044302A1 US 20080044302 A1 US20080044302 A1 US 20080044302A1 US 60433506 A US60433506 A US 60433506A US 2008044302 A1 US2008044302 A1 US 2008044302A1
- Authority
- US
- United States
- Prior art keywords
- plunger
- return spring
- end side
- proximal end
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 46
- 230000002093 peripheral effect Effects 0.000 claims abstract description 25
- 230000037431 insertion Effects 0.000 claims abstract description 23
- 238000003780 insertion Methods 0.000 claims abstract description 23
- 230000008030 elimination Effects 0.000 claims abstract description 4
- 238000003379 elimination reaction Methods 0.000 claims abstract description 4
- 239000000696 magnetic material Substances 0.000 description 5
- 239000003502 gasoline Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
Definitions
- the present invention relates to an electromagnetic fuel pump used for delivering a liquid fuel reserved in a fuel tank to a combustion apparatus, more particularly to a plunger type electromagnetic fuel pump.
- a fuel pump has been employed as a fuel delivery means of a combustion apparatus such as an oil heater, an engine or the like, and as described in Japanese Unexamined Patent Publication No. 5-79452 and Japanese Unexamined Patent Publication No. 2002-39067, there has been generally widely spread a plunger type electromagnetic fuel pump which can achieve a stable fuel delivery and an accurate flow rate control by repeating generation and elimination of a magnetic force to slidably reciprocate a plunger urged by a return spring for pressurizing a fuel in a fuel passage.
- a plunger 7 constituted by a magnetic material and arranged slidably in a cylinder 4 is moved backward on the basis of a magnetomotive force caused by a current application to an electromagnetic coil 5 against an urging force of a return spring 43 , and a check valve 32 provided in a leading end side of the plunger 7 is opened so as to introduce the fuel into a pressurizing chamber 6 formed in a front side of the plunger 7 from an intake port 46 formed in a proximal end of the cylinder 4 .
- the urging force of the return spring 43 overcomes the magnetic force by reducing or stopping the current to the electromagnetic coil 5 , and the plunger 7 is moved forward, thereby pressurizing the fuel in the pressurizing chamber 6 and a check valve 33 arranged on the downstream side of the pressurizing chamber 6 is opened.
- the fuel is delivered toward the engine from a discharge port 47 formed in the leading end of the cylinder 4 by repeating the operation mentioned above.
- the magnetomotive force by the electromagnetic coil 5 passes through the plunger 7 while passing through tubular bodies 42 and 42 constituting a part of the cylinder arranged around the electromagnetic coil 5 and the magnetic material constituting a coil cover 8 as shown by the thick arrow, thereby the plunger 7 is slidably attracted in a proximal end direction against an urging force of the return spring 43 so as to drive the pump.
- the conventional plunger type electromagnetic fuel pump is structured such that a return spring guide 36 annularly protruding from a proximal end surface of the plunger 7 for retaining a leading end side of the return spring 43 is formed to guide the return spring 43 in a state that the return spring guide 36 closely contacts the inner peripheral side of the return spring 43 .
- an air gap Y formed between the plunger 7 made of the magnetic material and the tubular body 42 forming a magnetic part of the cylinder 4 tends to become larger during a non-exciting time, and a loss of the magnetomotive force generated from the electromagnetic coil 5 becomes large. Therefore, it is not easy to achieve a compact structure and a weight saving of the electromagnetic fuel pump on the basis of necessity for securing a desired magnetic force.
- the return spring 43 arranged over a comparatively long distance along a center axis within the cylinder 4 is flexed within the cylinder and an urging direction thereof is not stable during actuating the pump, because a guide portion formed by the return spring guide 36 is short. Accordingly, there is a problem that a smooth sliding movement of the plunger 7 is prevented and it is hard to secure an accurate pump operation.
- the prevent invention is made for solving the problem mentioned above, and an object of the present invention is to secure an accurate pump operation while minimizing a loss of a magnetomotive force generated by an electromagnetic coil and making it possible to achieve a compact structure and a weight saving of an apparatus, in a plunger type electromagnetic fuel pump.
- an electromagnetic fuel pump comprising: a cylinder having a discharge port provided with a check valve on a leading end side and an intake port on a proximal end side thereof; a plunger slidably fitted in the cylinder, the plunger having a fuel passage formed along an axis thereof and provided with a check valve therein; a return spring arranged on the proximal end side between the plunger and the cylinder for urging the plunder in a leading end side direction; and an electromagnetic coil arranged on the outside of the cylinder, a current application to the electromagnetic coil being controlled so as to repeat generation and elimination of a magnetic force to cause the plunger to slidably reciprocate for delivering a fuel under pressure; wherein an insertion hole for inserting the return spring is provided in a proximal end surface of the plunger at a predetermined depth along a center axis of the plunger, and an inner peripheral surface of the insertion hole is formed as a spring guide
- the spring guide in the present invention is different from the conventional structure retaining the inner peripheral side of the return spring annularly protruding from the proximal end surface of the plunger, and is structured so as to retain the outer peripheral leading end side of the return spring by the inner peripheral surface of the insertion hole pierced from the proximal end surface of the plunger. Accordingly, an air gap formed between the plunger and the magnetic portion on the cylinder side for attracting the plunger becomes small, and it is easy to minimize the loss of the magnetomotive force. Further, it is possible to make the guide portion retaining the return spring longer than the conventional spring guide so as to make it easy to stably retain the return spring.
- a second insertion hole for inserting the return spring is provided in an inner proximal end surface of the cylinder at a predetermined depth along the center axis of the cylinder, and an inner peripheral surface thereof is formed as a spring guide retaining an outer peripheral proximal end side of the return spring, both end sides of the return spring can be stably held.
- FIG. 1 is a longitudinal cross sectional view showing an embodiment in accordance with the present invention
- FIG. 2 is an enlarged partial view of the proximal end side of the plunger in FIG. 1 ;
- FIG. 3 is a longitudinal cross sectional view showing a prior art
- FIG. 4 is an enlarged partial view of the proximal end side of the plunger in FIG. 3 .
- FIG. 1 shows a longitudinal cross sectional view of an electromagnetic fuel pump 1 , for example, in the case that the present invention is used in a fuel supply system of a gasoline engine.
- the electromagnetic fuel pump 1 introduces and pressure-feeds a fuel corresponding to a gasoline reserved in a fuel tank (not shown) so as to supply it to an engine via a fuel piping by an injector, and is called as a so-called plunger type electromagnetic fuel pump.
- the electromagnetic fuel pump 1 is structured such that an electromagnetic coil 5 is provided around a cylinder 4 , and a cylindrical plunger 3 is slidably provided in the cylinder 4 so as to be slidable in a horizontal direction in the drawing.
- a return spring 41 is arranged on a rear end side of the plunger 3 in a compressed state, and urges the plunger 3 toward the downward side, i.e., toward the left in the drawing.
- a fuel passage 38 passes through the plunger 3 along center axis thereof, a check valve 32 is arranged on a leading end side (left side in the drawing), a check valve 33 is also provided in the same manner in a fuel passage in the cylinder 4 on the downward side of the check valve 32 , and a pressurizing chamber 6 is formed between these two check valves 32 and 33 .
- the above structure is similar to the conventional plunger type electromagnetic fuel pump and is well known.
- an insertion hole 35 is provided along the center axis of the plunger 3 at a predetermined depth from the proximal end surface of the plunger 3 , and the inner peripheral surface thereof is formed as a spring guide retaining the outer peripheral leading end side of the return spring 41 . This point is one of great features of the present invention.
- the fuel passage 38 passes through the plunger 3 in conformity with the center axis thereof, and the insertion hole 35 is provided by enlarging the proximal end side of the fuel passage 38 so that its inner diameter is slightly larger than the outer diameter of the return spring 41 and the latter can be inserted in the insertion hole 35 .
- the leading end side of the return spring 41 is inserted in the insertion hole 35 , the leading end of the return spring 41 is brought into contact with the ring-shaped seat surface formed on a bottom surface of the insertion hole 35 on the basis of a difference between the original inner diameter of the fuel passage 38 and the inner diameter of the enlarged portion, and the plunger 3 is urged toward the leading end side of the electromagnetic fuel pump 1 .
- FIG. 2 shows a state before the electromagnetic coil 5 is excited, in which an air gap X in term of a passage of a line of magnetic force is formed between the proximal end side of the plunger 3 constituted by the magnetic material, and the tubular body 42 constituted by the magnetic material, however, the width of the air gap X becomes significantly smaller than the air gap Y in the conventional electromagnetic fuel pump 2 shown in FIG. 4 .
- the proximal end surface of the plunger 7 is positioned close to the leading end within the cylinder 4 and the air gap becomes large, but in the present invention, since the leading end side of the return spring 41 is inserted in the insertion hole 35 provided from the proximal end surface of the plunger 3 , and the outer peripheral side of the return spring 41 is held and guided by the inner peripheral surface of the insertion hole 35 , the proximal end surface of the plunger 3 is positioned closer to the proximal end within the cylinder than the prior art, and the air gap can be reduced.
- the guide portion formed by the inner peripheral surface of the insertion hole 35 becomes widely longer than the guide portion of the annularly protruding spring guide 36 in the prior art, it is possible to stably retain the return spring 41 tending to deflect in a centrifugal direction in accordance with the pumping operation, it is easy to stably actuate the plunger 3 , and it is easy to secure an accurate pumping operation.
- an insertion hole 45 having a predetermined depth is provided from the inner proximal end surface of the cylinder 4 with which the proximal end side of the return spring 41 is brought into contact, in the similar manner to the insertion hole 35 of the plunger 3 , and the proximal end portion of the return spring 41 is inserted in the insertion hole 45 so as to retain the outer peripheral proximal end side of the return spring 41 by the inner peripheral surface of the insertion hole 45 , so that both end sides of the return spring 41 are guided at the predetermined depths, the motion of the plunger becomes further stable, and it is possible to secure a more accurate pump operation.
- the plunger type electromagnetic fuel pump it is possible to minimize the loss of the magnetomotive force generated by the electromagnetic coil in accordance with the present invention, and it is possible to secure the accurate pump operation while making it possible to achieve the compact structure and the weight reduction of the apparatus.
Abstract
The invention can secure an improved pump operation while minimizing a loss of a magnetomotive force generated by an electromagnetic coil and making it possible to achieve a compact structure and a weight saving of an apparatus, in a plunger type electromagnetic fuel pump. In an electromagnetic fuel pump (1) which pressure-feeds a fuel by controlling a current application to an electromagnetic coil (5) and repeating generation and elimination of a magnetic force so as to slidably reciprocate a plunger (3) arranged in a cylinder (4) and having a proximal end side urged by a return spring (41), an insertion hole (35) for inserting the return spring (41) is provided from the proximal end surface of the plunger (3) at a predetermined depth along the center axis of the plunger (3), and the inner peripheral surface of the insertion hole (3) is formed as a spring guide retaining the outer peripheral leading end side of the return spring (41).
Description
- 1. Field of the Invention
- The present invention relates to an electromagnetic fuel pump used for delivering a liquid fuel reserved in a fuel tank to a combustion apparatus, more particularly to a plunger type electromagnetic fuel pump.
- 2. Description of Related Art
- Conventionally, a fuel pump has been employed as a fuel delivery means of a combustion apparatus such as an oil heater, an engine or the like, and as described in Japanese Unexamined Patent Publication No. 5-79452 and Japanese Unexamined Patent Publication No. 2002-39067, there has been generally widely spread a plunger type electromagnetic fuel pump which can achieve a stable fuel delivery and an accurate flow rate control by repeating generation and elimination of a magnetic force to slidably reciprocate a plunger urged by a return spring for pressurizing a fuel in a fuel passage.
- In the plunger type electromagnetic fuel pump, for example, as shown in a longitudinal cross sectional view, shown in
FIG. 3 , of an electromagnetic fuel pump used for supplying a liquid fuel such as a gasoline or the like to an engine, aplunger 7 constituted by a magnetic material and arranged slidably in acylinder 4 is moved backward on the basis of a magnetomotive force caused by a current application to anelectromagnetic coil 5 against an urging force of areturn spring 43, and acheck valve 32 provided in a leading end side of theplunger 7 is opened so as to introduce the fuel into a pressurizingchamber 6 formed in a front side of theplunger 7 from anintake port 46 formed in a proximal end of thecylinder 4. - Further, the urging force of the
return spring 43 overcomes the magnetic force by reducing or stopping the current to theelectromagnetic coil 5, and theplunger 7 is moved forward, thereby pressurizing the fuel in the pressurizingchamber 6 and acheck valve 33 arranged on the downstream side of the pressurizingchamber 6 is opened. The fuel is delivered toward the engine from adischarge port 47 formed in the leading end of thecylinder 4 by repeating the operation mentioned above. - As mentioned above, the magnetomotive force by the
electromagnetic coil 5 passes through theplunger 7 while passing throughtubular bodies electromagnetic coil 5 and the magnetic material constituting acoil cover 8 as shown by the thick arrow, thereby theplunger 7 is slidably attracted in a proximal end direction against an urging force of thereturn spring 43 so as to drive the pump. - In this case, as shown in an enlarged partial view of the proximal end side in the
plunger 7 shown inFIG. 4 , the conventional plunger type electromagnetic fuel pump is structured such that areturn spring guide 36 annularly protruding from a proximal end surface of theplunger 7 for retaining a leading end side of thereturn spring 43 is formed to guide thereturn spring 43 in a state that thereturn spring guide 36 closely contacts the inner peripheral side of thereturn spring 43. Accordingly, an air gap Y formed between theplunger 7 made of the magnetic material and thetubular body 42 forming a magnetic part of thecylinder 4 tends to become larger during a non-exciting time, and a loss of the magnetomotive force generated from theelectromagnetic coil 5 becomes large. Therefore, it is not easy to achieve a compact structure and a weight saving of the electromagnetic fuel pump on the basis of necessity for securing a desired magnetic force. - Further, the
return spring 43 arranged over a comparatively long distance along a center axis within thecylinder 4 is flexed within the cylinder and an urging direction thereof is not stable during actuating the pump, because a guide portion formed by thereturn spring guide 36 is short. Accordingly, there is a problem that a smooth sliding movement of theplunger 7 is prevented and it is hard to secure an accurate pump operation. - The prevent invention is made for solving the problem mentioned above, and an object of the present invention is to secure an accurate pump operation while minimizing a loss of a magnetomotive force generated by an electromagnetic coil and making it possible to achieve a compact structure and a weight saving of an apparatus, in a plunger type electromagnetic fuel pump.
- In accordance with the present invention made for solving the problem mentioned above, there is provided an electromagnetic fuel pump comprising: a cylinder having a discharge port provided with a check valve on a leading end side and an intake port on a proximal end side thereof; a plunger slidably fitted in the cylinder, the plunger having a fuel passage formed along an axis thereof and provided with a check valve therein; a return spring arranged on the proximal end side between the plunger and the cylinder for urging the plunder in a leading end side direction; and an electromagnetic coil arranged on the outside of the cylinder, a current application to the electromagnetic coil being controlled so as to repeat generation and elimination of a magnetic force to cause the plunger to slidably reciprocate for delivering a fuel under pressure; wherein an insertion hole for inserting the return spring is provided in a proximal end surface of the plunger at a predetermined depth along a center axis of the plunger, and an inner peripheral surface of the insertion hole is formed as a spring guide retaining an outer peripheral leading end side of the return spring.
- As mentioned above, the spring guide in the present invention is different from the conventional structure retaining the inner peripheral side of the return spring annularly protruding from the proximal end surface of the plunger, and is structured so as to retain the outer peripheral leading end side of the return spring by the inner peripheral surface of the insertion hole pierced from the proximal end surface of the plunger. Accordingly, an air gap formed between the plunger and the magnetic portion on the cylinder side for attracting the plunger becomes small, and it is easy to minimize the loss of the magnetomotive force. Further, it is possible to make the guide portion retaining the return spring longer than the conventional spring guide so as to make it easy to stably retain the return spring.
- Further, in the electromagnetic fuel pump, in the case that a second insertion hole for inserting the return spring is provided in an inner proximal end surface of the cylinder at a predetermined depth along the center axis of the cylinder, and an inner peripheral surface thereof is formed as a spring guide retaining an outer peripheral proximal end side of the return spring, both end sides of the return spring can be stably held.
- In accordance with the present invention structured such that the outer peripheral leading end side of the return spring urging the plunger is held by the inner peripheral surface of the insertion hole provided in the plunger, it is possible to reduce the air gap between the plunger proximal end side and the magnetic portion of the cylinder, and it is easy to achieve a compact structure and a weight saving of the apparatus while minimizing the loss of the magnetomotive force generated by the electromagnetic coil. Further, it is possible to make the guide portion of the return spring longer, and it is possible to secure an accurate pumping operation.
-
FIG. 1 is a longitudinal cross sectional view showing an embodiment in accordance with the present invention; -
FIG. 2 is an enlarged partial view of the proximal end side of the plunger inFIG. 1 ; -
FIG. 3 is a longitudinal cross sectional view showing a prior art; and -
FIG. 4 is an enlarged partial view of the proximal end side of the plunger inFIG. 3 . - The description will be given below of a best mode for carrying out the present invention with reference to the accompanying drawings.
-
FIG. 1 shows a longitudinal cross sectional view of anelectromagnetic fuel pump 1, for example, in the case that the present invention is used in a fuel supply system of a gasoline engine. Theelectromagnetic fuel pump 1 introduces and pressure-feeds a fuel corresponding to a gasoline reserved in a fuel tank (not shown) so as to supply it to an engine via a fuel piping by an injector, and is called as a so-called plunger type electromagnetic fuel pump. - Further, the
electromagnetic fuel pump 1 is structured such that anelectromagnetic coil 5 is provided around acylinder 4, and acylindrical plunger 3 is slidably provided in thecylinder 4 so as to be slidable in a horizontal direction in the drawing. Areturn spring 41 is arranged on a rear end side of theplunger 3 in a compressed state, and urges theplunger 3 toward the downward side, i.e., toward the left in the drawing. - A
fuel passage 38 passes through theplunger 3 along center axis thereof, acheck valve 32 is arranged on a leading end side (left side in the drawing), acheck valve 33 is also provided in the same manner in a fuel passage in thecylinder 4 on the downward side of thecheck valve 32, and a pressurizingchamber 6 is formed between these twocheck valves - Further, in the present embodiment, an
insertion hole 35 is provided along the center axis of theplunger 3 at a predetermined depth from the proximal end surface of theplunger 3, and the inner peripheral surface thereof is formed as a spring guide retaining the outer peripheral leading end side of thereturn spring 41. This point is one of great features of the present invention. - With reference to an enlarged partial view of the proximal end side of the
plunger 3 inFIG. 2 , thefuel passage 38 passes through theplunger 3 in conformity with the center axis thereof, and theinsertion hole 35 is provided by enlarging the proximal end side of thefuel passage 38 so that its inner diameter is slightly larger than the outer diameter of thereturn spring 41 and the latter can be inserted in theinsertion hole 35. - Further, the leading end side of the
return spring 41 is inserted in theinsertion hole 35, the leading end of thereturn spring 41 is brought into contact with the ring-shaped seat surface formed on a bottom surface of theinsertion hole 35 on the basis of a difference between the original inner diameter of thefuel passage 38 and the inner diameter of the enlarged portion, and theplunger 3 is urged toward the leading end side of theelectromagnetic fuel pump 1. -
FIG. 2 shows a state before theelectromagnetic coil 5 is excited, in which an air gap X in term of a passage of a line of magnetic force is formed between the proximal end side of theplunger 3 constituted by the magnetic material, and thetubular body 42 constituted by the magnetic material, however, the width of the air gap X becomes significantly smaller than the air gap Y in the conventionalelectromagnetic fuel pump 2 shown inFIG. 4 . - This is because in the prior art, since the inner peripheral side of the
return spring 43 is held and guided by the outer peripheral surface of thespring guide 36 annularly protruding from the proximal end surface of theplunger 7, the proximal end surface of theplunger 7 is positioned close to the leading end within thecylinder 4 and the air gap becomes large, but in the present invention, since the leading end side of thereturn spring 41 is inserted in theinsertion hole 35 provided from the proximal end surface of theplunger 3, and the outer peripheral side of thereturn spring 41 is held and guided by the inner peripheral surface of theinsertion hole 35, the proximal end surface of theplunger 3 is positioned closer to the proximal end within the cylinder than the prior art, and the air gap can be reduced. - Accordingly, it is easy to restrict the loss of the electromotive force generated by the
electromagnetic coil 5 to the minimum, and it is possible to achieve a pump performance equal to or more than the conventional one by the lighter and more compact apparatus. - Further, as shown in
FIG. 2 , the guide portion formed by the inner peripheral surface of theinsertion hole 35 becomes widely longer than the guide portion of the annularly protrudingspring guide 36 in the prior art, it is possible to stably retain thereturn spring 41 tending to deflect in a centrifugal direction in accordance with the pumping operation, it is easy to stably actuate theplunger 3, and it is easy to secure an accurate pumping operation. - Further, as shown in
FIG. 1 , aninsertion hole 45 having a predetermined depth is provided from the inner proximal end surface of thecylinder 4 with which the proximal end side of thereturn spring 41 is brought into contact, in the similar manner to theinsertion hole 35 of theplunger 3, and the proximal end portion of thereturn spring 41 is inserted in theinsertion hole 45 so as to retain the outer peripheral proximal end side of thereturn spring 41 by the inner peripheral surface of theinsertion hole 45, so that both end sides of thereturn spring 41 are guided at the predetermined depths, the motion of the plunger becomes further stable, and it is possible to secure a more accurate pump operation. - As mentioned above, in the plunger type electromagnetic fuel pump, it is possible to minimize the loss of the magnetomotive force generated by the electromagnetic coil in accordance with the present invention, and it is possible to secure the accurate pump operation while making it possible to achieve the compact structure and the weight reduction of the apparatus.
Claims (2)
1. An electromagnetic fuel pump comprising:
a cylinder having a discharge port provided with a check valve on a leading end side and an intake port on a proximal end side thereof;
a plunger slidably fitted in the cylinder, the plunger having a fuel passage formed along an axis thereof and provided with a check valve therein;
a return spring arranged on the proximal end side between the plunger and the cylinder for urging the plunder in a leading end side direction; and
an electromagnetic coil arranged on the outside of the cylinder, a current application to the electromagnetic coil being controlled so as to repeat generation and elimination of a magnetic force to cause the plunger to slidably reciprocate for delivering a fuel under pressure;
wherein an insertion hole for inserting the return spring is provided in a proximal end surface of the plunger at a predetermined depth along a center axis of the plunger, and an inner peripheral surface of the insertion hole is formed as a spring guide retaining an outer peripheral leading end side of the return spring.
2. The electromagnetic fuel pump as claimed in claim 1 , wherein a second insertion hole for inserting the return spring is provided in a proximal end surface of the cylinder at a predetermined depth along the center axis of the cylinder, and an inner peripheral surface of the second insertion hole is formed as a spring guide retaining an outer peripheral proximal end side of the return spring.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-222895 | 2006-08-18 | ||
JP2006222895A JP2008045508A (en) | 2006-08-18 | 2006-08-18 | Electromagnetic fuel pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080044302A1 true US20080044302A1 (en) | 2008-02-21 |
Family
ID=39101563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/604,335 Abandoned US20080044302A1 (en) | 2006-08-18 | 2006-11-27 | Electromagnetic fuel pump |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080044302A1 (en) |
JP (1) | JP2008045508A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105464917A (en) * | 2014-09-12 | 2016-04-06 | 浙江福爱电子有限公司 | Electromagnetic pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6421098B2 (en) * | 2015-08-25 | 2018-11-07 | シルバー株式会社 | Electromagnetic pump and pulsating water discharge device using the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5346372A (en) * | 1991-07-18 | 1994-09-13 | Aisin Seiki Kabushiki Kaisha | Fluid flow regulating device |
US20040022651A1 (en) * | 2000-10-18 | 2004-02-05 | Shogo Hashimoto | Electromagnetic drive type plunger pump |
US20050130507A1 (en) * | 2003-12-16 | 2005-06-16 | Yokowo Co., Ltd. | Spring connector |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01163458A (en) * | 1987-12-21 | 1989-06-27 | Aisin Seiki Co Ltd | Electromagnetic fuel pump |
JP2738653B2 (en) * | 1994-09-28 | 1998-04-08 | 太産工業株式会社 | Electromagnetic pump for liquid circulation in high vacuum environment |
JP2002039057A (en) * | 2000-07-28 | 2002-02-06 | Silver Kk | Electromagnetic pump |
-
2006
- 2006-08-18 JP JP2006222895A patent/JP2008045508A/en active Pending
- 2006-11-27 US US11/604,335 patent/US20080044302A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5346372A (en) * | 1991-07-18 | 1994-09-13 | Aisin Seiki Kabushiki Kaisha | Fluid flow regulating device |
US20040022651A1 (en) * | 2000-10-18 | 2004-02-05 | Shogo Hashimoto | Electromagnetic drive type plunger pump |
US20050130507A1 (en) * | 2003-12-16 | 2005-06-16 | Yokowo Co., Ltd. | Spring connector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105464917A (en) * | 2014-09-12 | 2016-04-06 | 浙江福爱电子有限公司 | Electromagnetic pump |
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Publication number | Publication date |
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JP2008045508A (en) | 2008-02-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NIKKI CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OHNISHI, KOUSUKE;REEL/FRAME:018908/0746 Effective date: 20070118 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |