CA1155893A - Direct current solenoid operator having non- magnetic core tube - Google Patents
Direct current solenoid operator having non- magnetic core tubeInfo
- Publication number
- CA1155893A CA1155893A CA000360673A CA360673A CA1155893A CA 1155893 A CA1155893 A CA 1155893A CA 000360673 A CA000360673 A CA 000360673A CA 360673 A CA360673 A CA 360673A CA 1155893 A CA1155893 A CA 1155893A
- Authority
- CA
- Canada
- Prior art keywords
- core tube
- plugnut
- armature
- valve
- direct current
- 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
Links
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
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Electromagnets (AREA)
Abstract
DIRECT CURRENT SOLENOID OPERATOR
HAVING NON-MAGNETIC CORE TUBE
Abstract of the Disclosure A direct current solenoid operator of the type including an annular electrical solenoid winding, a non-magnetic core tube within the winding, a magnetic armature slidable longitudinally within the core tube, and a magnetic plugnut, within the solenoid winding, but outside the core tube, so that the wall of the core tube is between, and completely separates, the plugnut and armature. The operator of this invention is characterized by the core tube having a reduced diameter portion extending beyond the portion of the core tube occupied by the armature, and the plugnut being in the form of a hollow sleeve surrounding the reduced diameter portion of the core tube. When the operator is assembled with a valve body, the free end of the reduced diameter portion of the core tube defines an inlet port for the valve.
HAVING NON-MAGNETIC CORE TUBE
Abstract of the Disclosure A direct current solenoid operator of the type including an annular electrical solenoid winding, a non-magnetic core tube within the winding, a magnetic armature slidable longitudinally within the core tube, and a magnetic plugnut, within the solenoid winding, but outside the core tube, so that the wall of the core tube is between, and completely separates, the plugnut and armature. The operator of this invention is characterized by the core tube having a reduced diameter portion extending beyond the portion of the core tube occupied by the armature, and the plugnut being in the form of a hollow sleeve surrounding the reduced diameter portion of the core tube. When the operator is assembled with a valve body, the free end of the reduced diameter portion of the core tube defines an inlet port for the valve.
Description
1 ~5~8g3 This invention relates to solenoid operators, intended for energization by direct current, such as those used to open and close valves for controlling the flow of fluids. Although the primary application of this invention is in the field of solenoid-operated valves, the solenoid operator of this invention may be used to control any suitable device.
A conventional direct current solenoid operator includes an annular solenoid winding surrounding a tube, often referred to as a "core tube", made of a non-magnetic material. Slidable longitudinally within the core tube is an armature of magnetic material, the armature being exposed through one open end of the core tube The exposed end of the armature is connected to a valve member or any other ele-,nent to be controlled by the movement of the armature. Fixed within the other end portion of the core tube is a magnetic block, often called a "plugnut". Where the core tube is of the type initially open at both ends, the plugnut closes the end of the core tube within which it is located. Alternatively, the core tube may be of the seamless, or deep drawn, type whereby the tube is formed closed at one end, in which case the plugnut is completely enclosed by, and fills, the closed end of the tube A yoke of magnetic material extends around the solenoid winding, the armature, plugnut, and yoke compris-ing a magnetic circuit.
,..~
~, ~i 6 1 15~893 When the solenoid is energized by direct current, magnetic flux flowing through the magnetic circuit causes the movable armature to be attracted to the plugnut, thereby mov-in~ the armature further into the core tube. Upon deenergization of the solenoid, a spring returns the armature to its original position by moving it away from the plugnut. Since the plug-nut retains a residual magnetism after deenergization of the solenoid, there is a tendency for the armature to remain attracted to the plugnut. To deal with this situation, it is common practice to furnish the face of the plugnut which is engaged by the armature with a thin piece of non-magnetic material, usually called a "breaker piece". By preventing intimate contact between the armature and plugnut, the breaker piece greatly reduces the attraction effect between the armature and plugnut due to the residual magnetism in the plugnut. The advantage of this is that a lower spring force i9 needed to return the armature than would be needed in the absence of a breaker piece. The lower the spring force, the greater the proportion of power pulling the solenoid toward the plugnut, against the spring force, which can be used to perform useful work.
It is an object of the present invention to pro-vide a direct current solenoid operator devoid of a breaker piece, but which nevertheless includes the function ordinarily performed by the breaker piece.
1 15~893 It is another object of the invention, where the solenoid operator employs a seamless core tube, to provide a solenoid operator of greater magnetic efficiency by reducing the non-magnetic flux gaps in the magnetic circuit.
It is a further object of the invention toErovide a direct current solenoid operator which, when used to operate a packless valve controlling the flow of liquids, has greater magnetic efficiency and is less costly to produce than conventional operators.
These objectives are achieved, according to the invention, by locating the plugnut outside the core tube rather than within it, as is conventional practice. With the plugnut located outside the core tube, the wall of the core tube serves to permanently separate the plugnut and armature. Hence, the core tube wall serves the function of the usual breaker piece, and the breaker piece can be eliminated.
Elimination of the hreaker piece not only reduces the cost of the solenoid operator, but it improves magnetic efficiency by removing one flux gap from the magnetic circuit. Ordinarily in such cases, both the core tube wall and the breaker piece create non-magnetic gaps in the magnetic circuit. In the absence of a breaker piece, one of the usual gaps is not pre-sent In a packless valve, the interior of the core tube communicates with the flow passages through the valve body with the result that the interior of the core tube is filled with the ~luid being handled by the valve. Conventionally, therefore, the fluid contacts both the armature and the plug-nut, both of which are within the core tube. When a solenoid operator according to the present invention i9 employed, the plugnut is not contacted by the fluid flowing through the valve, since it i9 located outside the core tube. As a result, the plugnut may be made of a material which has a higher magnetic permeability, and is less costly, as compared to conventional plugnuts, because resistance to corrosion due to the fluid being handled need not be considered when choosing the material of which the plugnut is made. Thus, magnetic efficiency is increased and cost of manufacture reduced.
Additional objects and features of the invention will be apparent from~the following description in which refer-ence is made to the accompanying drawings.
In the drawings:
Fig. l is a top view of a valve provided with a direct current solenoid operator according to the present nvention;
Fig. 2 is a longitudinal cross-sectional view taken on line 2-2 of Fig. l, showing the valve closed;
Fig. 3 is a fragmentary view of a portion of Fig.
A conventional direct current solenoid operator includes an annular solenoid winding surrounding a tube, often referred to as a "core tube", made of a non-magnetic material. Slidable longitudinally within the core tube is an armature of magnetic material, the armature being exposed through one open end of the core tube The exposed end of the armature is connected to a valve member or any other ele-,nent to be controlled by the movement of the armature. Fixed within the other end portion of the core tube is a magnetic block, often called a "plugnut". Where the core tube is of the type initially open at both ends, the plugnut closes the end of the core tube within which it is located. Alternatively, the core tube may be of the seamless, or deep drawn, type whereby the tube is formed closed at one end, in which case the plugnut is completely enclosed by, and fills, the closed end of the tube A yoke of magnetic material extends around the solenoid winding, the armature, plugnut, and yoke compris-ing a magnetic circuit.
,..~
~, ~i 6 1 15~893 When the solenoid is energized by direct current, magnetic flux flowing through the magnetic circuit causes the movable armature to be attracted to the plugnut, thereby mov-in~ the armature further into the core tube. Upon deenergization of the solenoid, a spring returns the armature to its original position by moving it away from the plugnut. Since the plug-nut retains a residual magnetism after deenergization of the solenoid, there is a tendency for the armature to remain attracted to the plugnut. To deal with this situation, it is common practice to furnish the face of the plugnut which is engaged by the armature with a thin piece of non-magnetic material, usually called a "breaker piece". By preventing intimate contact between the armature and plugnut, the breaker piece greatly reduces the attraction effect between the armature and plugnut due to the residual magnetism in the plugnut. The advantage of this is that a lower spring force i9 needed to return the armature than would be needed in the absence of a breaker piece. The lower the spring force, the greater the proportion of power pulling the solenoid toward the plugnut, against the spring force, which can be used to perform useful work.
It is an object of the present invention to pro-vide a direct current solenoid operator devoid of a breaker piece, but which nevertheless includes the function ordinarily performed by the breaker piece.
1 15~893 It is another object of the invention, where the solenoid operator employs a seamless core tube, to provide a solenoid operator of greater magnetic efficiency by reducing the non-magnetic flux gaps in the magnetic circuit.
It is a further object of the invention toErovide a direct current solenoid operator which, when used to operate a packless valve controlling the flow of liquids, has greater magnetic efficiency and is less costly to produce than conventional operators.
These objectives are achieved, according to the invention, by locating the plugnut outside the core tube rather than within it, as is conventional practice. With the plugnut located outside the core tube, the wall of the core tube serves to permanently separate the plugnut and armature. Hence, the core tube wall serves the function of the usual breaker piece, and the breaker piece can be eliminated.
Elimination of the hreaker piece not only reduces the cost of the solenoid operator, but it improves magnetic efficiency by removing one flux gap from the magnetic circuit. Ordinarily in such cases, both the core tube wall and the breaker piece create non-magnetic gaps in the magnetic circuit. In the absence of a breaker piece, one of the usual gaps is not pre-sent In a packless valve, the interior of the core tube communicates with the flow passages through the valve body with the result that the interior of the core tube is filled with the ~luid being handled by the valve. Conventionally, therefore, the fluid contacts both the armature and the plug-nut, both of which are within the core tube. When a solenoid operator according to the present invention i9 employed, the plugnut is not contacted by the fluid flowing through the valve, since it i9 located outside the core tube. As a result, the plugnut may be made of a material which has a higher magnetic permeability, and is less costly, as compared to conventional plugnuts, because resistance to corrosion due to the fluid being handled need not be considered when choosing the material of which the plugnut is made. Thus, magnetic efficiency is increased and cost of manufacture reduced.
Additional objects and features of the invention will be apparent from~the following description in which refer-ence is made to the accompanying drawings.
In the drawings:
Fig. l is a top view of a valve provided with a direct current solenoid operator according to the present nvention;
Fig. 2 is a longitudinal cross-sectional view taken on line 2-2 of Fig. l, showing the valve closed;
Fig. 3 is a fragmentary view of a portion of Fig.
2 showing the valve openJ and Fig. 4 is a view similar to Fig. 2, showin~ another embodiment of the invention.
1 15~8~3 Operator 15 includes a yoke 18 formed of one piece of magnetic material, e.g., a ferrous metal, bent to the required shape. The yoke has a base 19 presenting two longi-tudinally projecting ears 20, each ear having an internally threaded hole. By means of two brackets 21, and two machine screws 22 which are threaded into the holes in ears 20, yoke 18, and hence the solenoid operator, is secured to valve body 10. The yoke further includes upstanding arms 23 bent upwardly from base 19, and horizontal sections 24 bent inwardly from the upper ends of arms 23. The horizontal sections are of stepped configuration designed so that they mesh, as shown in Fig. 1, to form a top wall of the yoke, and each section 24 is formed with a generally semicircular cutout which combine to define a hole 25 in the top wall of the yoke.
Within yoke 18 is an annular electrical solenoid winding 28 provided with conventional means (not shown) for energizing it with direct current power. Within the solenoid winding is a seamless core tube 29 made of a non-magnetic, usually metallic, material. The core tube extends into the solenoid winding for about half the height of the latter, and is closed at its upper end by an end wall 30 having a frusto-conical shape, as shown, or any other suitable shape for optimizing the magnetic characteristics of the arrangement. The lower end of core tube 29 is open and formed with an outwardly directed flange, an o-ring seal 31 being squeezed between the flange and yoke base 19.
Core tube 29 accommodates a longitudinally slidable armature 32 made of magnetic material. At its lower end, armature 1 15;)893 32 carries a valve member 33, of resilient material, located within a chamber 34 in the valve body and adapted to cooperate with valve seat 14. A compression spring 35, within chamber 34, constantly urges valve member 33, and hence armature 32 toward valve seat 14.
Seated on the outer surface of core tube top wall 30 is a plugnut 38. The plugnut fills the balance of the interior of solenoid winding 28 not occupied by core tube 29, and projects upwardly beyond the solenoid. At its upper end, plugnut 38 presents a reduced diameter post 39 fitted within the hole 25 of yoke 18. Plugnut 38 is squeezed tightly between top wall 30 and yoke sections 24 to insure good contact between sections 24 and the upwardly facing wall of the plugnut surrounding post 39. It will be seen that plugnut 38 is entirely outside core tube 29, and that top wall 30 of the core tube is between and completely separates the plugnut and armature 32.
When solenoid winding 28 is energized by direct current power, magnetic flux flows through the magnetic circuit from yoke base 19, through arms 23, sections 24, plugnut 38, and armature 32, back to base 19. As a result, armature 32 is attracted to plugnut 38, against the force of spring 35, to open the valve, as shown in Fig. 3. Fluid flows from inlet port 11, through passageway 40 in the valve body, chamber 34, and orifice 13, to outlet port 12. Upon deenergization of winding 28, spring 35 returns armature 32 downwardly bringing valve member 33 into engagement with seat 14 to close the valve, as shown in Fig. 2. Throughout the operation of the valve, chamber 34 and the interior of core tube 29 are filled with the fluid being controlled by the valve, since they are in constant communication with inlet port 11 through passageway 40. However, since plugnut 38 i8 located outside the core tube, the fluid never contacts the plugnut. Hence, there is no possibility of the fluid having a corrosive effect on the plugnut.
It will also be seen that no separate breaker piece is employed since top wall 30 of the core tube serves the function of a breaker piece, i.e., preventing contact between armature 32 and plugnut 38 when solenoid 28 is energized, as shown in Fig. 3. As a result, when the solenoid is deenergized, the non-magnetic gap created by top wall 30 reduces the effect on armature 32 of residual magnetism in plugnut 38. Furthermore, although a seamless core tube 29 is employed, the magnetic cir-cuit is interrupted by only two ~aps, one between the plugnut and armature caused by the top wall 30, and one between the armature and yoke base 19 caused by the side wall of core tube 29. In contrast, if plugnut 38 were inside core tube 29, a third gap in the magnetic circuit would be created by a required breaker piece between the plugnut and armature.
Another embodiment of the solenoid operator of this invention, applied to a valve, is illustrated in Fig. 4. Parts in this figure identical to those of Figs. 1-3 bear the ~ame reference numerals as in the earlier figures, and parts generally corresponding to those of Figs. 1-3 bear the ~ame reference numerals, followed by a prime, as in the earlier figurec~ In this ~orm of the invention, the core tube 29' ha~ a reduced diameter portion 43 extending from the core tube portion which accommodates armature 32'. The upper end of portion 43 could be closed, or as shown in Fig. 4 is open to define a port 11' of the valve. A slot 44 in armature 32' permits fluid communication between port 11' and chamber 34, the chamber in turn communicating, when the valve is open, with outlet port 12' through orifice 13'. In this embodiment, pluqnut 38' is in the form of a hollow sleeve surrounding portion 43 of core tube 29', and whlch seats on the frusto-conical wall 45 of the core tube. Plugnut 38' i9 squeezed tightly between wall 45 and yoke sections 24 to insure good contact between the upper end of the plugnut and the yoke sections.
As in the previously-described emb~diment, plugnut 38' is separated from armature 32' by core tube wall 45, thereby eliminating the need for a separate breaker piece, and plugnut 38' is never contacted by fluid being handled by the valve. The valve of Fig. 4 operates in a manner similar to that of the valve of ~ s.1-3 in that armature 32' rises to open the valve when solenoid winding 28 is energized, and i8 returned by spring 35 to close the valve, as shown in Fig.
4, when the solenoid is deenergized.
1 ~5~893 The invention has been shown and described in preferred form only, and by way of example, and many variation~
may be made in the invention which will still be comprised within its spirit. It is underctood~ therefore, that the invention is not limited to any specific form or embodiment except insofar as such limitations are included in the appended claims.
1 15~8~3 Operator 15 includes a yoke 18 formed of one piece of magnetic material, e.g., a ferrous metal, bent to the required shape. The yoke has a base 19 presenting two longi-tudinally projecting ears 20, each ear having an internally threaded hole. By means of two brackets 21, and two machine screws 22 which are threaded into the holes in ears 20, yoke 18, and hence the solenoid operator, is secured to valve body 10. The yoke further includes upstanding arms 23 bent upwardly from base 19, and horizontal sections 24 bent inwardly from the upper ends of arms 23. The horizontal sections are of stepped configuration designed so that they mesh, as shown in Fig. 1, to form a top wall of the yoke, and each section 24 is formed with a generally semicircular cutout which combine to define a hole 25 in the top wall of the yoke.
Within yoke 18 is an annular electrical solenoid winding 28 provided with conventional means (not shown) for energizing it with direct current power. Within the solenoid winding is a seamless core tube 29 made of a non-magnetic, usually metallic, material. The core tube extends into the solenoid winding for about half the height of the latter, and is closed at its upper end by an end wall 30 having a frusto-conical shape, as shown, or any other suitable shape for optimizing the magnetic characteristics of the arrangement. The lower end of core tube 29 is open and formed with an outwardly directed flange, an o-ring seal 31 being squeezed between the flange and yoke base 19.
Core tube 29 accommodates a longitudinally slidable armature 32 made of magnetic material. At its lower end, armature 1 15;)893 32 carries a valve member 33, of resilient material, located within a chamber 34 in the valve body and adapted to cooperate with valve seat 14. A compression spring 35, within chamber 34, constantly urges valve member 33, and hence armature 32 toward valve seat 14.
Seated on the outer surface of core tube top wall 30 is a plugnut 38. The plugnut fills the balance of the interior of solenoid winding 28 not occupied by core tube 29, and projects upwardly beyond the solenoid. At its upper end, plugnut 38 presents a reduced diameter post 39 fitted within the hole 25 of yoke 18. Plugnut 38 is squeezed tightly between top wall 30 and yoke sections 24 to insure good contact between sections 24 and the upwardly facing wall of the plugnut surrounding post 39. It will be seen that plugnut 38 is entirely outside core tube 29, and that top wall 30 of the core tube is between and completely separates the plugnut and armature 32.
When solenoid winding 28 is energized by direct current power, magnetic flux flows through the magnetic circuit from yoke base 19, through arms 23, sections 24, plugnut 38, and armature 32, back to base 19. As a result, armature 32 is attracted to plugnut 38, against the force of spring 35, to open the valve, as shown in Fig. 3. Fluid flows from inlet port 11, through passageway 40 in the valve body, chamber 34, and orifice 13, to outlet port 12. Upon deenergization of winding 28, spring 35 returns armature 32 downwardly bringing valve member 33 into engagement with seat 14 to close the valve, as shown in Fig. 2. Throughout the operation of the valve, chamber 34 and the interior of core tube 29 are filled with the fluid being controlled by the valve, since they are in constant communication with inlet port 11 through passageway 40. However, since plugnut 38 i8 located outside the core tube, the fluid never contacts the plugnut. Hence, there is no possibility of the fluid having a corrosive effect on the plugnut.
It will also be seen that no separate breaker piece is employed since top wall 30 of the core tube serves the function of a breaker piece, i.e., preventing contact between armature 32 and plugnut 38 when solenoid 28 is energized, as shown in Fig. 3. As a result, when the solenoid is deenergized, the non-magnetic gap created by top wall 30 reduces the effect on armature 32 of residual magnetism in plugnut 38. Furthermore, although a seamless core tube 29 is employed, the magnetic cir-cuit is interrupted by only two ~aps, one between the plugnut and armature caused by the top wall 30, and one between the armature and yoke base 19 caused by the side wall of core tube 29. In contrast, if plugnut 38 were inside core tube 29, a third gap in the magnetic circuit would be created by a required breaker piece between the plugnut and armature.
Another embodiment of the solenoid operator of this invention, applied to a valve, is illustrated in Fig. 4. Parts in this figure identical to those of Figs. 1-3 bear the ~ame reference numerals as in the earlier figures, and parts generally corresponding to those of Figs. 1-3 bear the ~ame reference numerals, followed by a prime, as in the earlier figurec~ In this ~orm of the invention, the core tube 29' ha~ a reduced diameter portion 43 extending from the core tube portion which accommodates armature 32'. The upper end of portion 43 could be closed, or as shown in Fig. 4 is open to define a port 11' of the valve. A slot 44 in armature 32' permits fluid communication between port 11' and chamber 34, the chamber in turn communicating, when the valve is open, with outlet port 12' through orifice 13'. In this embodiment, pluqnut 38' is in the form of a hollow sleeve surrounding portion 43 of core tube 29', and whlch seats on the frusto-conical wall 45 of the core tube. Plugnut 38' i9 squeezed tightly between wall 45 and yoke sections 24 to insure good contact between the upper end of the plugnut and the yoke sections.
As in the previously-described emb~diment, plugnut 38' is separated from armature 32' by core tube wall 45, thereby eliminating the need for a separate breaker piece, and plugnut 38' is never contacted by fluid being handled by the valve. The valve of Fig. 4 operates in a manner similar to that of the valve of ~ s.1-3 in that armature 32' rises to open the valve when solenoid winding 28 is energized, and i8 returned by spring 35 to close the valve, as shown in Fig.
4, when the solenoid is deenergized.
1 ~5~893 The invention has been shown and described in preferred form only, and by way of example, and many variation~
may be made in the invention which will still be comprised within its spirit. It is underctood~ therefore, that the invention is not limited to any specific form or embodiment except insofar as such limitations are included in the appended claims.
Claims (5)
1. A direct current solenoid operator, comprising:
(a) an annular electrical solenoid winding, (b) a non-magnetic core tube within the solenoid winding, (c) a magnetic armature slidable longitudinally within the core tube, the core tube having a reduced diameter portion extending beyond the portion of the core tube occupied by the armature, and (d) a magnetic plugnut within the solenoid winding, the plugnut being outside the core tube so that the wall of the core tube is between, and completely separates, the plugnut and armature, the plugnut being in the form of a hollow sleeve surrounding the reduced diameter portion of the core tube.
(a) an annular electrical solenoid winding, (b) a non-magnetic core tube within the solenoid winding, (c) a magnetic armature slidable longitudinally within the core tube, the core tube having a reduced diameter portion extending beyond the portion of the core tube occupied by the armature, and (d) a magnetic plugnut within the solenoid winding, the plugnut being outside the core tube so that the wall of the core tube is between, and completely separates, the plugnut and armature, the plugnut being in the form of a hollow sleeve surrounding the reduced diameter portion of the core tube.
2. A direct current solenoid operator as defined in Claim 1 which is devoid of a separate non-magnetic breaker price between the armature and plugnut, the core tube wall serving to prevent intimate contact between the armature and plugnut.
3. A direct current solenoid operator as defined in Claim 1 assembled with a valve body, and wherein the free end of the reduced diameter portion of the core tube defines an inlet port for the valve.
4. A direct current solenoid operator as defined in Claim 1 assembled with:
(e) a valve body having an orifice surrounded by a valve seat located between an inlet port and an outlet port, and (f) a valve member carried by the armature and movable with the armature into and out of engagement with the valve seat to close and open the valve, respectively.
(e) a valve body having an orifice surrounded by a valve seat located between an inlet port and an outlet port, and (f) a valve member carried by the armature and movable with the armature into and out of engagement with the valve seat to close and open the valve, respectively.
5. A direct current solenoid operator as defined in Claim 4 wherein the interior of the core tube communicates with the fluid flow path through the valve body, the core tube being between the fluid flow path and the plugnut, thereby preventing the fluid flowing through the valve from contacting the plugnut.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8602079A | 1979-10-17 | 1979-10-17 | |
| US086,020 | 1979-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1155893A true CA1155893A (en) | 1983-10-25 |
Family
ID=22195662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000360673A Expired CA1155893A (en) | 1979-10-17 | 1980-09-19 | Direct current solenoid operator having non- magnetic core tube |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5673409A (en) |
| AU (1) | AU6174780A (en) |
| BR (1) | BR8006549A (en) |
| CA (1) | CA1155893A (en) |
| DE (1) | DE3039071A1 (en) |
| FR (1) | FR2468192A1 (en) |
| GB (1) | GB2061015A (en) |
| NL (1) | NL8005600A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6127137Y2 (en) * | 1981-01-08 | 1986-08-13 | ||
| DE3446366A1 (en) * | 1984-02-06 | 1985-08-08 | Johnson Service Co., Milwaukee, Wis. | SOLENOID WITH REDUCED NOISE LEVEL |
| JPS61186873U (en) * | 1985-05-14 | 1986-11-21 | ||
| US5032812A (en) * | 1990-03-01 | 1991-07-16 | Automatic Switch Company | Solenoid actuator having a magnetic flux sensor |
| JP2001304447A (en) * | 2000-04-25 | 2001-10-31 | Aisin Seiki Co Ltd | Electromagnetic actuator device |
| DE102005061184A1 (en) * | 2005-12-21 | 2007-08-30 | Hydac Electronic Gmbh | actuator |
| DE102013017259B4 (en) * | 2013-10-17 | 2022-02-10 | Staiger Gmbh & Co. Kg | Valve |
| ITUB20151329A1 (en) * | 2015-05-29 | 2016-11-29 | Bitron Spa | Electric actuator in direct current, in particular for household appliances |
| JP2017057935A (en) * | 2015-09-17 | 2017-03-23 | リンナイ株式会社 | solenoid valve |
| JP6613086B2 (en) * | 2015-09-17 | 2019-11-27 | リンナイ株式会社 | solenoid valve |
-
1980
- 1980-08-26 AU AU61747/80A patent/AU6174780A/en not_active Abandoned
- 1980-09-19 CA CA000360673A patent/CA1155893A/en not_active Expired
- 1980-10-09 NL NL8005600A patent/NL8005600A/en not_active Application Discontinuation
- 1980-10-10 BR BR8006549A patent/BR8006549A/en not_active IP Right Cessation
- 1980-10-15 FR FR8022029A patent/FR2468192A1/en active Granted
- 1980-10-16 DE DE19803039071 patent/DE3039071A1/en not_active Withdrawn
- 1980-10-16 GB GB8033418A patent/GB2061015A/en not_active Withdrawn
- 1980-10-17 JP JP14556980A patent/JPS5673409A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB2061015A (en) | 1981-05-07 |
| AU6174780A (en) | 1981-04-30 |
| DE3039071A1 (en) | 1981-04-30 |
| JPS5673409A (en) | 1981-06-18 |
| NL8005600A (en) | 1981-04-22 |
| FR2468192A1 (en) | 1981-04-30 |
| FR2468192B3 (en) | 1982-03-12 |
| BR8006549A (en) | 1981-04-22 |
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