JPH0112949B2 - - Google Patents
Info
- Publication number
- JPH0112949B2 JPH0112949B2 JP17716982A JP17716982A JPH0112949B2 JP H0112949 B2 JPH0112949 B2 JP H0112949B2 JP 17716982 A JP17716982 A JP 17716982A JP 17716982 A JP17716982 A JP 17716982A JP H0112949 B2 JPH0112949 B2 JP H0112949B2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- solenoid coil
- transistors
- diode
- power supply
- 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.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は液体燃料燃焼装置の燃料ポンプとして
利用されるソレノイドポンプの駆動装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a drive device for a solenoid pump used as a fuel pump for a liquid fuel combustion device.
(ロ) 背景技術
従来、此種のソレノイドポンプの駆動装置とし
て第１図に示すものがあつた。第１図に於いて、
１は直流電源、２及び３は該直流電源１の両端に
接続された母線であり、該母線２，３間にプラン
ジヤー（図示せず）駆動用のソレノイドコイル４
とNPNトランジスタ５が直列接続されている。
ソレノイドコイル４には直流電源１と逆向きのダ
イオード６と順方向のツエナーダイオード７とか
らなる直列回路が並列に接続されている。８はト
ランジスタ５のベースに接続された入力装置であ
り、ソレノイドポンプを運転させる際に、所定周
期の矩形パルスをトランジスタ５のベースに供給
する。(b) Background Art Conventionally, there has been a drive device for this type of solenoid pump as shown in FIG. In Figure 1,
1 is a DC power source, 2 and 3 are busbars connected to both ends of the DC power source 1, and a solenoid coil 4 for driving a plunger (not shown) is connected between the busbars 2 and 3.
and NPN transistor 5 are connected in series.
The solenoid coil 4 is connected in parallel to the DC power source 1, a series circuit consisting of a diode 6 in the opposite direction and a Zener diode 7 in the forward direction. An input device 8 is connected to the base of the transistor 5, and supplies a rectangular pulse of a predetermined period to the base of the transistor 5 when operating the solenoid pump.
上述した駆動装置では入力装置８から所定周期
の矩形パルスがトランジスタ５に供給されるとソ
レノイドポンプが運転する。即ち、トランジスタ
５はベースにパルス入力がある間に導通してソレ
ノイドコイル４に通電される。ソレノイドコイル
４は通電によりプランジヤーをスプリング（図示
せず）に抗して吸引し、ソレノイドポンプ内の燃
料油を吐出させる。トランジスタ５にパルス入力
がなくなると、トランジスタ５が遮断し、ソレノ
イドコイル４の吸引力がなくなつてプランジヤー
が押し戻されるため、ソレノイドポンプ内に燃料
油が吸引される。以下、これの繰返しにより、ソ
レノイドポンプから燃焼装置（図示せず）へ燃料
油が断続的に供給される。尚、ダイオード６とツ
エナーダイオード７の直列回路はトランジスタ５
が遮断した際、ソレノイドコイル４に保有されて
いた磁気エネルギーによる放電電流をツエナーダ
イオード７のブレークオーバー電圧により抑制し
て急速に減衰させ、入力装置８の発振周波数が高
い場合にもプランジヤーの往復動が支障なく行な
われるようにするためのものである。 In the drive device described above, when a rectangular pulse with a predetermined period is supplied from the input device 8 to the transistor 5, the solenoid pump is operated. That is, the transistor 5 is conductive while the base receives a pulse input, and the solenoid coil 4 is energized. When the solenoid coil 4 is energized, it attracts the plunger against a spring (not shown) and discharges the fuel oil in the solenoid pump. When the pulse input to the transistor 5 disappears, the transistor 5 shuts off, the suction force of the solenoid coil 4 disappears, and the plunger is pushed back, so that fuel oil is sucked into the solenoid pump. Thereafter, by repeating this process, fuel oil is intermittently supplied from the solenoid pump to the combustion device (not shown). Note that the series circuit of diode 6 and Zener diode 7 is transistor 5.
When the oscillation frequency of the input device 8 is high, the discharge current due to the magnetic energy stored in the solenoid coil 4 is suppressed by the breakover voltage of the Zener diode 7 and rapidly attenuated. This is to ensure that the process can be carried out without any hindrance.
ところで、上述した駆動装置は次の欠点があつ
た。 However, the above-mentioned drive device has the following drawbacks.
○イ ソレノイドコイル４の放電電流がソレノイド
コイル４−ツエナーダイオード７−ダイオード
６−ソレノイドコイル４の径路で流れ、ツエナ
ーダイオード７での電力損失が大きいため、消
費電力が大きくなり、直流電源１に容量の大き
なものを使用しなければならなかつた。○A The discharge current of the solenoid coil 4 flows through the path of the solenoid coil 4 - the Zener diode 7 - the diode 6 - the solenoid coil 4, and the power loss in the Zener diode 7 is large, so the power consumption becomes large, and the DC power supply 1 has a capacity I had to use a large one.
○ロ ツエナーダイオード７は電力損失が大きいた
め、発熱に耐え得る高価な大電力素子を使用し
なければならなかつた。○B Since the Zener diode 7 has a large power loss, it was necessary to use an expensive high-power element that can withstand heat generation.
○ハ トランジスタ５は遮断時に電源電圧にツエナ
ーダイオード７のブレークオーバー電圧を重畳
した電圧がコレクタにかかるため、耐電圧の大
きな高価なものを使用しなければならなかつ
た。(C) When the transistor 5 is cut off, a voltage obtained by superimposing the breakover voltage of the Zener diode 7 on the power supply voltage is applied to the collector, so an expensive transistor with a high withstand voltage had to be used.
(ハ) 発明の目的
本発明は上述した従来技術の欠点を一挙に解消
すべく図られたものであり、電力消費を低減さ
せ、ツエナーダイオード等の大電力素子や耐電圧
の大きなトランジスタを不用にしつつ、ソレノイ
ドコイルの放電電流を急速に減衰できるようにし
たソレノイドポンプの駆動装置を提供することを
目的とする。(c) Purpose of the Invention The present invention has been designed to eliminate the above-mentioned drawbacks of the prior art at once, reducing power consumption and eliminating the need for high-power elements such as Zener diodes and transistors with high withstand voltages. Another object of the present invention is to provide a solenoid pump driving device that can rapidly attenuate the discharge current of a solenoid coil.
(ニ) 発明の要点
本発明は直流電源１の両端に、該直流電源１に
対して逆向きの第１ダイオード９と、第１トラン
ジスタ１０とからなる直列回路を接続するととも
に、第２トランジスタ１１と、上記直流電源１に
対して逆向きの第２ダイオード１２とからなる直
列回路を接続し、両直列回路の中間接続点間にソ
レノイドポンプのソレノイドコイル４を接続し、
両トランジスタ１０，１１のうち少なくとも一方
に入力信号を供給して両トランジスタ１０，１１
を同時にオン、オフさせるようにしたことを特徴
とする構成である。かかる構成によれば、両トラ
ンジスタ１０，１１のうち少なくとも一方に入力
信号が供給され、両トランジスタ１０，１１がと
もにオンになると、直流電源１から一方のトラン
ジスタ、ソレノイドコイル４、他方のトランジス
タの径路で電流が流れる。又、入力信号が供給さ
れなくなり、両トランジスタ１０，１１がともに
オフになると、ソレノイドコイル４に保有された
磁気エネルギーによる放電電流がソレノイドコイ
ル４、一方のダイオード、直流電源１、他方のダ
イオード、ソレノイドコイル４の径路で流れ、直
流電源１に回生される。この発明では２つのダイ
オード９，１２を介してソレノイドコイル４の磁
気エネルギーを直流電源１に回生させるので、ツ
エナーダイオード等の大電力用の電流制限素子を
用いて放電電流を抑制するものに比べて電力損失
が極めて少なく、電力消費を低減することが可能
になるとともに回生の際の熱損失も少なくなる。
又、両トランジスタ１０，１１がオフした際、そ
れぞれのトランジスタ１０，１１に加わる電圧は
最大でも電源電圧にダイオードの順方向降下電圧
を加えた電圧になり、それぞれのトランジスタ１
０，１１にほぼ電源電圧程度の耐電圧を有するも
のを使用することが可能になる。更に、両トラン
ジスタ１０，１１のオフに伴いソレノイドコイル
４に逆電圧が発生すると共に、それぞれのダイオ
ード９，１２を介して直流電源１の電源電圧が逆
電圧としてソレノイドコイル４に加わることにな
り、早くソレノイドコイル４の磁気エネルギーを
減衰させることができ、高い周波数でもプランジ
ヤーの往復運転を支障なく行なうことが可能にな
る。(d) Main points of the invention The present invention connects a series circuit consisting of a first diode 9 and a first transistor 10 opposite to the DC power source 1 across both ends of the DC power source 1, and a second transistor 11. and a second diode 12 in the opposite direction to the DC power source 1, and a solenoid coil 4 of a solenoid pump is connected between the intermediate connection points of both series circuits.
By supplying an input signal to at least one of both transistors 10 and 11, both transistors 10 and 11
This configuration is characterized in that it is turned on and off at the same time. According to this configuration, when an input signal is supplied to at least one of the transistors 10 and 11 and both transistors 10 and 11 are turned on, the path from the DC power supply 1 to the one transistor, the solenoid coil 4, and the other transistor is A current flows. Also, when the input signal is no longer supplied and both transistors 10 and 11 are turned off, a discharge current due to the magnetic energy held in the solenoid coil 4 flows through the solenoid coil 4, one diode, the DC power supply 1, the other diode, and the solenoid. It flows through the path of the coil 4 and is regenerated by the DC power supply 1. In this invention, the magnetic energy of the solenoid coil 4 is regenerated to the DC power supply 1 via the two diodes 9 and 12, so compared to the case where the discharge current is suppressed using a current limiting element for high power such as a Zener diode. Power loss is extremely low, making it possible to reduce power consumption and also reducing heat loss during regeneration.
Further, when both transistors 10 and 11 are turned off, the voltage applied to each transistor 10 and 11 is at most the power supply voltage plus the forward drop voltage of the diode, and each transistor 10 and 11 is turned off.
0 and 11, it becomes possible to use a material having a withstand voltage approximately equal to the power supply voltage. Further, as both transistors 10 and 11 are turned off, a reverse voltage is generated in the solenoid coil 4, and the power supply voltage of the DC power supply 1 is applied as a reverse voltage to the solenoid coil 4 via the respective diodes 9 and 12. The magnetic energy of the solenoid coil 4 can be quickly attenuated, and the plunger can be operated back and forth without any trouble even at high frequencies.
(ホ) 発明の実施例
以下、本発明を図面に示す実施例について説明
する。第２図は本発明装置の一実施例を示すもの
であり、第１図に示すものと同一部分には同一符
号を付してある。第２図に於いて、第１図のもの
と異なるのは直流電源１の両端に接続した母線
２，３間に直流電源１と逆向きの第１ダイオード
９と、第１（NPN）トランジスタ１０とからなる
直列回路と、第２（NPN）トランジスタ１１と、
直流電源１と逆向きの第２ダイオード１２とから
なる直列回路とを接続し、両直列回路の中間接続
点１３，１４間にプランジヤー（図示せず）駆動
用のソレノイドコイル４を接続し、入力装置８を
両トランジスタ１０，１１のベースに接続して、
両トランジスタ１０，１１が同時にオン、オフす
るようにしてあることである。(E) Embodiments of the Invention Examples of the present invention shown in the drawings will be described below. FIG. 2 shows an embodiment of the apparatus of the present invention, and the same parts as those shown in FIG. 1 are given the same reference numerals. What is different in FIG. 2 from the one in FIG. 1 is that there is a first diode 9 in the opposite direction to the DC power source 1 between the bus bars 2 and 3 connected to both ends of the DC power source 1, and a first (NPN) transistor 10. a series circuit consisting of a second (NPN) transistor 11,
A series circuit consisting of a DC power supply 1 and a second diode 12 facing in the opposite direction is connected, and a solenoid coil 4 for driving a plunger (not shown) is connected between intermediate connection points 13 and 14 of both series circuits, and an input Connecting the device 8 to the bases of both transistors 10, 11,
Both transistors 10 and 11 are turned on and off at the same time.
上述した本実施例装置の動作を第３図を参照し
て説明する。まず、時刻Ｔ１において入力装置８
からトランジスタ１０，１１のベースに同時にパ
ルス入力が入ると、両トランジスタ１０，１１が
オンとなり、ソレノイドコイル４に母線２−トラ
ンジスタ１１−ソレノイドコイル４−トランジス
タ１０−母線３の径路で電流が流れる。このた
め、ソレノイドコイル４はプランジヤーをスプリ
ングに抗して吸引し、ソレノイドポンプ内の燃料
油を吐出させる。次に、時刻Ｔ２において、トラ
ンジスタ１０，１１のベースにパルス入力が同時
になくなると、トランジスタ１０，１１が共にオ
フとなるため、ソレノイドコイル４の吸引力がな
くなり、プランジヤーがスプリングにて押し戻さ
れてソレノイドポンプ内に燃料油が吸引される。
このとき、ソレノイドコイル４に保有されていた
磁気エネルギーによる放電電流がソレノイドコイ
ル４−第１ダイオード９−直流電源１−第２ダイ
オード１２−ソレノイドコイル４の径路で流れ、
直流電源１に回生される。以下、これの繰返しに
より、ソレノイドポンプから燃焼装置へ燃料油が
断続的に供給される。 The operation of the apparatus of this embodiment described above will be explained with reference to FIG. First, at time T1, the input device 8
When pulse inputs are simultaneously applied to the bases of the transistors 10 and 11, both transistors 10 and 11 are turned on, and a current flows through the solenoid coil 4 through the path of bus 2 - transistor 11 - solenoid coil 4 - transistor 10 - bus 3. Therefore, the solenoid coil 4 attracts the plunger against the spring and discharges the fuel oil in the solenoid pump. Next, at time T2, when the pulse input to the bases of transistors 10 and 11 is simultaneously removed, both transistors 10 and 11 are turned off, so the attraction force of solenoid coil 4 is lost, and the plunger is pushed back by the spring, causing the solenoid to Fuel oil is sucked into the pump.
At this time, a discharge current due to the magnetic energy held in the solenoid coil 4 flows in the path of the solenoid coil 4 - first diode 9 - DC power supply 1 - second diode 12 - solenoid coil 4,
It is regenerated to the DC power supply 1. Thereafter, by repeating this, fuel oil is intermittently supplied from the solenoid pump to the combustion device.
而して、本実施例装置に依れば、トランジスタ
１０，１１がオフした際、ソレノイドコイル４の
放電電流が直流電源１に回生されるので、従来の
ようにツエナーダイオード等の大電力用の電流制
限素子を用いて放電電流を抑制するものに比べて
電力損失が極めて少なく、電力消費が低減される
ことになり、直流電源１の容量を小さくできる。
又、トランジスタ１０，１１がオフした際、第３
図ｃ及びｄに示すように、接続点１３の電圧が
VB（電源電圧）＋α（ダイオード順方向降下電
圧）、接続点１４の電圧が−αとなるため、両ト
ランジスタ１０，１１に加わる電圧は最大VB＋
αとなり、両トランジスタ１０，１１はほぼ電源
電圧程度の耐電圧を有するものであれば良い。更
に又、トランジスタ１０，１１のオフに伴なうソ
レノイドコイル４の放電電流はソレノイドコイル
４の両端がほぼ電源電圧（VB＋2α）に抑制され
て急速に減衰されることになる。例えば、電源電
圧が140Vの場合、70Vのブレークオーバー電圧
を有するツエナーダイオードを用いて放電電流を
抑制する従来装置と比較すると、本発明装置では
放電電流の減衰時間が半減されることになる。し
かも、発熱を伴わず、装置をコンパトにまとめる
ことができる。 According to the device of this embodiment, when the transistors 10 and 11 are turned off, the discharge current of the solenoid coil 4 is regenerated to the DC power supply 1, so that it is possible to Compared to the case where the discharge current is suppressed using a current limiting element, power loss is extremely small, power consumption is reduced, and the capacity of the DC power supply 1 can be reduced.
Also, when the transistors 10 and 11 are turned off, the third
As shown in figures c and d, the voltage at connection point 13 is
VB (power supply voltage) + α (diode forward drop voltage), and the voltage at the connection point 14 is -α, so the voltage applied to both transistors 10 and 11 is maximum VB +
α, and both transistors 10 and 11 need only have a withstand voltage approximately equal to the power supply voltage. Furthermore, the discharge current of the solenoid coil 4 caused by turning off the transistors 10 and 11 is rapidly attenuated because both ends of the solenoid coil 4 are suppressed to approximately the power supply voltage (VB+2α). For example, when the power supply voltage is 140V, the decay time of the discharge current is halved in the device of the present invention compared to a conventional device that suppresses the discharge current using a Zener diode with a breakover voltage of 70V. Furthermore, the device can be made compact without generating heat.
第４図は本発明の他の一実施例を示すものであ
り、第２図のものと異なるのは第２トランジスタ
１１′をPNP型とし、母線２と接続点１３間に抵
抗１５，１６の直列回路を接続し、該直列回路の
中間接続点１７をトランジスタ１１′のベースに
接続し、入力装置８を第１トランジスタ１０のベ
ースにのみ接続してあることである。斯かる構成
にすれば、第１トランジスタ１０のパルス入力に
より、該トランジスタ１０がオン、オフすると、
第２トランジスタ１１′のベース電流が制御され、
両トランジスタ１０，１１′が同期してオン、オ
フするようになる。他の動作は第２図のものと同
一であるので省略する。 FIG. 4 shows another embodiment of the present invention, which differs from the one in FIG. A series circuit is connected, the intermediate connection point 17 of the series circuit is connected to the base of the transistor 11', and the input device 8 is connected only to the base of the first transistor 10. With such a configuration, when the first transistor 10 is turned on and off by the pulse input to the first transistor 10,
The base current of the second transistor 11' is controlled,
Both transistors 10 and 11' are turned on and off synchronously. The other operations are the same as those in FIG. 2 and will therefore be omitted.
(ヘ) 発明の効果
本発明は以上のように構成されているので、ソ
レノイドコイルの放電電流を直流電源に回生さ
せ、電力消費を低減させることができ、直流電源
に小容量のものが使用できるとともに、回生の際
の熱損失を少なくすることができ、さらに、ツエ
ナーダイオード等の大電力素子や耐電圧の大きな
トランジスタを不用にし、且つ、両トランジスタ
のオフに伴いソレノイドコイルに逆電圧が発生
し、さらに、それぞれのダイオードを介して直流
電源の電源電圧が逆電圧としてソレノイドコイル
に加わることになり、早くソレノイドコイルの磁
気エネルギーを減衰させることができ、この結
果、高い周波数でもプランジヤーの往復運動を支
障なく行わせることができる。更には発熱が少な
く、装置をコンパクトにできるなど、経済性及び
実用性に極めて富んでいる。(F) Effects of the Invention Since the present invention is configured as described above, the discharge current of the solenoid coil can be regenerated into the DC power supply, power consumption can be reduced, and a small capacity DC power supply can be used. At the same time, it is possible to reduce heat loss during regeneration, eliminate the need for high-power elements such as Zener diodes, and transistors with high withstand voltages, and eliminate the generation of reverse voltage in the solenoid coil when both transistors are turned off. In addition, the power supply voltage of the DC power supply is applied to the solenoid coil as a reverse voltage through each diode, and the magnetic energy of the solenoid coil can be quickly attenuated. As a result, the reciprocating motion of the plunger can be suppressed even at high frequencies. It can be done without any problem. Furthermore, it generates little heat and can be made compact, making it extremely economical and practical.
第１図は従来装置の一例を示す電気回路図、第
２図は本発明装置の一実施例を示す電気回路図、
第３図は本発明装置の動作説明図、第４図は本発
明装置の他の一実施例を示す電気回路図である。
１……直流電源、４……ソレノイドコイル、８
……入力装置、９……第１ダイオード、１０……
第１トランジスタ、１１，１１′……第２トラン
ジスタ、１２……第２ダイオード、１３，１４…
…中間接続点。
FIG. 1 is an electric circuit diagram showing an example of a conventional device, FIG. 2 is an electric circuit diagram showing an embodiment of the device of the present invention,
FIG. 3 is an explanatory diagram of the operation of the apparatus of the present invention, and FIG. 4 is an electric circuit diagram showing another embodiment of the apparatus of the present invention. 1...DC power supply, 4...Solenoid coil, 8
...Input device, 9...First diode, 10...
First transistor, 11, 11'... Second transistor, 12... Second diode, 13, 14...
...Intermediate connection point.
Claims (1)
きの第１ダイオードと、第１トランジスタとから
なる直列回路を接続するとともに、第２トランジ
スタと、上記直流電源に対して逆向きの第２ダイ
オードとからなる直列回路を接続し、両直列回路
の中間接続点間にソレノイドポンプのソレノイド
コイルを接続し、両トランジスタのうち少なくと
も一方に入力信号を供給して両トランジスタを同
時にオン、オフさせるようにしたことを特徴とす
るソレノイドポンプの駆動装置。1 A series circuit consisting of a first diode facing oppositely to the DC power source and a first transistor is connected to both ends of the DC power source, and a series circuit consisting of a second transistor and a second transistor facing oppositely to the DC power source is connected to both ends of the DC power source. A series circuit consisting of a diode is connected, a solenoid coil of a solenoid pump is connected between the intermediate connection point of both series circuits, and an input signal is supplied to at least one of the two transistors to turn both transistors on and off at the same time. A solenoid pump drive device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17716982A JPS5965581A (en) | 1982-10-07 | 1982-10-07 | Drive device of solenoid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17716982A JPS5965581A (en) | 1982-10-07 | 1982-10-07 | Drive device of solenoid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5965581A JPS5965581A (en) | 1984-04-13 |
| JPH0112949B2 true JPH0112949B2 (en) | 1989-03-02 |
Family
ID=16026390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17716982A Granted JPS5965581A (en) | 1982-10-07 | 1982-10-07 | Drive device of solenoid pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5965581A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61282632A (en) * | 1985-06-05 | 1986-12-12 | Miki Puurii Kk | Coil control circuit for electromagnetic clutch, brake and the like |
| JPS61282631A (en) * | 1985-06-05 | 1986-12-12 | Miki Puurii Kk | Coil control circuit for electromagnetic clutch, brake and the like |
| JPS61282630A (en) * | 1985-06-05 | 1986-12-12 | Miki Puurii Kk | Coil control circuit for electromagnetic clutch, brake and the like |
| FR2847708A1 (en) * | 2002-11-27 | 2004-05-28 | Invensys S A M | Device for reducing sound level of oscillating piston pump used in e.g. coffee makers, includes additional electric circuit branch mounted in parallel with electromagnetic coil and consisting of rectifying diode and switch mounted in series |
| JP6331510B2 (en) * | 2014-03-12 | 2018-05-30 | 株式会社ジェイテクト | Electromagnetic clutch control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5260403A (en) * | 1975-11-12 | 1977-05-18 | Matsushita Electric Ind Co Ltd | Driving device for electromagnetic pump |
-
1982
- 1982-10-07 JP JP17716982A patent/JPS5965581A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5965581A (en) | 1984-04-13 |
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