US2946551A - Detachable mounting for solenoid coil - Google Patents

Detachable mounting for solenoid coil Download PDF

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US2946551A
US2946551A US663064A US66306457A US2946551A US 2946551 A US2946551 A US 2946551A US 663064 A US663064 A US 663064A US 66306457 A US66306457 A US 66306457A US 2946551 A US2946551 A US 2946551A
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annular
diaphragm
passage
face
plate
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US663064A
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Kovach Julius William
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American Radiator and Standard Sanitary Corp
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American Radiator and Standard Sanitary Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines

Definitions

  • This invention relates to a structure for detachably mounting solenoid coils.
  • the invention may be employed in the mounting of solenoid coils on water mixing valves in automatic clothes washing machines.
  • Objects of the invention ⁇ are to provide a mounting structure for solenoid coils, wherein:
  • the coil may be easily and quickly removed in the leld for repair or replacement purposes without the aid of a screw driver, pliers or other similar tool, and withoutrremoving any screws or other extraneous structure, and
  • the coil may be mounted in any one of several adjusted positions in accordance with the exterior wiring harness arrangement and construction, whereby to conserve on wiring and enable easy manual positionment of the wiring onto the solenoid terminals without any States Patent spring 16 forces yarmature 14 down in tubularguide17 until it closes centralopening 18 in diaphragm 12.
  • the diaphragm is provided with a bleed opening19, and when central opening 18 is closed by ⁇ armature 14 the fluid from chamber 7 flows through opening 19 and develops a downward pressure on surface 20 of the diaphragm. This downward pressure forces the diaphragm toward surface 9 so as to close passage 8 to the fluid in chamber 7.
  • housing 5 maybe provided with two, three or more solenoidsY and diaphragms'in accordance with the desired number of mixed water temperatures and iluid streams to be handled by the valve housing.
  • the valve housing is provided with one or more mounting brackets 21 for securing the housing in place in the washing Ymachine (or other location where the valve might be employed).
  • Bracket 21 includes a flat annular wall portion 22 which ts against flat exterior face 23 of the housing so ⁇ as to overlie peripheral flange 24 of guide member 17.
  • a plate25 of spring steel overlies wall portion 22,4 and headed screws'26 extend through undesired twisting of the wiring or interference of the wiring with other structure located in close clearance areas.
  • Fig. .1 is a sectional view on iline 1--1 inFig. 2, illustrating one embodiment of the invention.
  • Y Y Fig. 2 is a top plan View of the Fig. l construction.
  • Fig. 3 is a fragmentary sectional view on line 33 in Fig. 2.
  • valve housing.5 which is utilized to mix hot and cold water prior to entry thereof into the tub of an automatic clothes washing machine.
  • Housing 5 is provided with an inlet 6 for hot water which leads to an annular inlet chamber 7.
  • a passage 8 Concentrically located within chamber 7 is a passage 8 which cooperates with chamber 7 to dene an annular valve surface 9.
  • Housing 5 is provided with an annular groove 10 which receives the edge portion 11 of a rubber diaphragm 12.
  • diaphragm 12 In its Fig. l position diaphragm 12 has its surface 13 located-away from valvesurface 9 so as to permit flow of hotiluid'fromannular chamber 7 into central paslsage 8'. ⁇ Inorder to close passage 8 to the uid in chamher7ydiaphragn1iw12,iscausedtohiiex so as to Y put'surface 13 in pressure engagement with annular valve surface 9.
  • Plate 25 is slitV through at three circumferentially spaced points to'provide three fingers 34, 35 and 36.
  • Each finger includes a web portion 37 extending angularly from plate 25 andthen parallel thereto as at 38.
  • the extreme outer end of portion 38 is deformed into a generally conical configuration so as to form a detent portion 39 which is adapted to enter into a'circular opening' 40 formed in the adjacent ear (31, 32 or 33).
  • member 29 In assembling'coil 15 and housing 29 Onto valve housing 5 member 29 is positioned with its'edge 30 against the exposedface of plate 25 and with ears 31 through 33 between screws 26 ⁇ and the various spring fingers 34 through 36.'V Then housing 29 is manually turned in a counterclockwise direction (as viewed in Fig. 2)' so as to move ears 31, 32 and 33 against the inclined surfaces 41 formed by conical portions 39. The spring lingers are thereby cammed upwardly so as to permit further counterclockwise movement of member 29. Continued movement of member 29 causes openings 40 to register with conical detent portions 39, at which time the detent portions snap down through the openings to releasably 'retain housing member 29 and coil 15 in the Fig. l position. The coil and memberV 29 maybe removed for repairorreplacement purposes by manually'rotating member 29 in a clockwise direction. Screwsf26 ⁇ need not be touched to remove members 29 and b15.
  • terminals 27 and 28 are advantageous in adapting the solenoid to diierent wiring arrangements and different valve designs. In one location it might be most desirable to have the terminals in their illustrated positions, and in another location it might be desirable to have the terminals rotated through one hundred twenty degrees (clockwise or counterclockwise). Correct positionrnent ofthe terminals can reduce wiring costs by eliminating an undesired lengthening of the wiring which might otherwise be required to 'curL the wiring around obstructions and over to aparticularly obstructed terminal. Correct positionment of. the, terminals can also reduce the timerequired to installthe solenoids and valves.
  • a solenoid. valve comprising a valve housing having a fiat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said.
  • a solenoid valve comprising a valve housing having a flat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the first passage and another opening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular ange overlying the peripheral edge of thediaphragm; an armature slidably positioned in said tubular guide for movements toward and away from the central opening to control exing movement of the diaphragm into and out of sealing engagement with the annular sealing surface; a coil encircling the tubular guide for operating the armature; a flat annular wall element having two parallel flat faces; said wall element having one of said flat faces positioned on the aforementioned flat valve housing face with the inner edge area thereof overlying the aforementioned annular flange; a
  • a solenoid valve comprising a valve housing having a flat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from 4said face to dene an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the first passage and another opening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular flange 'overlying the peripheral edge of the diaphragm; an armature slidably positioned in said tubular guide for movements tov/ard and away from the central opening to control fiexing movement of the diaphragm into and out of sealing engagement with the annular ⁇ sealing surface; a coil encircling the tubular guide for operating the armature; a mounting bracket carried by the valve housing and comprising a mounting wall portion extending angularly from adjacent said housing exterior face and an annular wall portion extending from the mounting wall portion; said
  • a solenoid valve comprising a valve housing having a fiat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the rst passage and anotheropening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular fiange overlying the peripheral edge of the diaphragm; an armature slidably positioned in said tubular guidefor movements toward and away from the central openingto control flexing movement of the diaphragm in to and out of sealing engagement with the annular sealing surface; a coil encircling the tubular guide for opcratingthe armature; a mounting bracket for the valve comprising a mounting wall portion extending angularly from adjacent said housing exterior face and an annular wall portion extending from the mounting Wall portion; said annular wall
  • said parallel faces being positioned on the aforementioned flat valve housing face with the inner edge area thereof overlyingthe aforementionedannular flange; a-at annular plate positioned on the other parallel face. of the annular wall portion; circumferentially spaced screws extending through the annular plate and annular wall element into the valve housing for securing the plate and wall element thereon; portions of said plate being cut away and deflected out of the plate plane to form a series of circumferentially spaced spring fingers; a cup-shaped housing overlying the coil and having a plurality of circumferentially spaced ears releasably retained between the spring ngers and annular plate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Description

July 26, 1960 J. w. KovAcH 2,946,551
OETAOHABLE MOUNTING FOR SOLENOID COIL Filed June 5, 1957 INVEN TOR JUL/U5 W/LL/AM Ko VAC/4 5M/ mwf/y IW/MWI Unite Julius William Kovach, Detroit, Mich., assignor to American Radiator & Standard Sanitary Corporation, New York, N.Y., a corporation of Delaware Filed June 3, 1957, Ser. No. 663,064
4 Claims. (Cl. 251-30) This invention relates to a structure for detachably mounting solenoid coils. The invention may be employed in the mounting of solenoid coils on water mixing valves in automatic clothes washing machines.
Objects of the invention `are to provide a mounting structure for solenoid coils, wherein:
(l) The coil may be easily and quickly removed in the leld for repair or replacement purposes without the aid of a screw driver, pliers or other similar tool, and withoutrremoving any screws or other extraneous structure, and
(2) The coil may be mounted in any one of several adjusted positions in accordance with the exterior wiring harness arrangement and construction, whereby to conserve on wiring and enable easy manual positionment of the wiring onto the solenoid terminals without any States Patent spring 16 forces yarmature 14 down in tubularguide17 until it closes centralopening 18 in diaphragm 12. The diaphragm is provided with a bleed opening19, and when central opening 18 is closed by `armature 14 the fluid from chamber 7 flows through opening 19 and develops a downward pressure on surface 20 of the diaphragm. This downward pressure forces the diaphragm toward surface 9 so as to close passage 8 to the fluid in chamber 7. When coil is energized armature 14.is withdrawn to its illustrated position so as to relieve the iluid pressure above diaphragm 12 through opening 18 and thereby enable the incoming fluid pressure to open the diaphragm. In practice, housing 5 maybe provided with two, three or more solenoidsY and diaphragms'in accordance with the desired number of mixed water temperatures and iluid streams to be handled by the valve housing.
The valve housing is provided with one or more mounting brackets 21 for securing the housing in place in the washing Ymachine (or other location where the valve might be employed). Bracket 21 includes a flat annular wall portion 22 which ts against flat exterior face 23 of the housing so `as to overlie peripheral flange 24 of guide member 17. A plate25 of spring steel overlies wall portion 22,4 and headed screws'26 extend through undesired twisting of the wiring or interference of the wiring with other structure located in close clearance areas.
Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.
In the drawings:
Fig. .1 is a sectional view on iline 1--1 inFig. 2, illustrating one embodiment of the invention. Y Y Fig. 2 is a top plan View of the Fig. l construction.
Fig. 3 is a fragmentary sectional view on line 33 in Fig. 2.
Before explaining the present invention in detail, it is to be understood that the invention is not limited in Y Also, it is to be understood that the phraseology or terminology employed herein is forthe purpose of description and not of limitation.
In the drawings there is shown part of a valve housing.5 which is utilized to mix hot and cold water prior to entry thereof into the tub of an automatic clothes washing machine. Housing 5 is provided with an inlet 6 for hot water which leads to an annular inlet chamber 7. Concentrically located within chamber 7 is a passage 8 which cooperates with chamber 7 to dene an annular valve surface 9. Housing 5 is provided with an annular groove 10 which receives the edge portion 11 of a rubber diaphragm 12.
In its Fig. l position diaphragm 12 has its surface 13 located-away from valvesurface 9 so as to permit flow of hotiluid'fromannular chamber 7 into central paslsage 8'.` Inorder to close passage 8 to the uid in chamher7ydiaphragn1iw12,iscausedtohiiex so as to Y put'surface 13 in pressure engagement with annular valve surface 9.
Flexing of diaphragm 12 is accomplished by meansA of an amature 14 which is operated by a solenoid coil 15 Aare integrally formed with member 29 and extend right angu-larly therefrom so as to lie flat against plate 25.
Plate 25 is slitV through at three circumferentially spaced points to'provide three fingers 34, 35 and 36. Each finger includes a web portion 37 extending angularly from plate 25 andthen parallel thereto as at 38. The extreme outer end of portion 38 is deformed into a generally conical configuration so as to form a detent portion 39 which is adapted to enter into a'circular opening' 40 formed in the adjacent ear (31, 32 or 33).
In assembling'coil 15 and housing 29 Onto valve housing 5 member 29 is positioned with its'edge 30 against the exposedface of plate 25 and with ears 31 through 33 between screws 26 `and the various spring fingers 34 through 36.'V Then housing 29 is manually turned in a counterclockwise direction (as viewed in Fig. 2)' so as to move ears 31, 32 and 33 against the inclined surfaces 41 formed by conical portions 39. The spring lingers are thereby cammed upwardly so as to permit further counterclockwise movement of member 29. Continued movement of member 29 causes openings 40 to register with conical detent portions 39, at which time the detent portions snap down through the openings to releasably 'retain housing member 29 and coil 15 in the Fig. l position. The coil and memberV 29 maybe removed for repairorreplacement purposes by manually'rotating member 29 in a clockwise direction. Screwsf26` need not be touched to remove members 29 and b15. c:
It will be noted that the ears and spring iin`gers1are equidistantly spaced, and that the va'riousear's landspring fingers are identical in construction. As a resultfit' is possible to position any given ear beneath any given spring tinger soas to provide three diiferent angular posi- Y tions'of terminals 27 and 28. Thus, ear 31 could-be positioned beneath'iinger 35 o r benea'thriinger 36." 1 f1, y
The angular adjustment of terminals 27 and 28 is advantageous in adapting the solenoid to diierent wiring arrangements and different valve designs. In one location it might be most desirable to have the terminals in their illustrated positions, and in another location it might be desirable to have the terminals rotated through one hundred twenty degrees (clockwise or counterclockwise). Correct positionrnent ofthe terminals can reduce wiring costs by eliminating an undesired lengthening of the wiring which might otherwise be required to 'curL the wiring around obstructions and over to aparticularly obstructed terminal. Correct positionment of. the, terminals can also reduce the timerequired to installthe solenoids and valves.
I claim:
1. A solenoid. valve comprising a valve housing having a fiat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said. passages and having a, central opening therein inregistry with the first passagerand` another opening therein in registry with the annular passage; a tubular guide` in axial registry with the central opening and having an annular fiange overlying the peripheral edge of the diaphragm; an armature slidably positioned in said tubular guideV for movements toward and away from the central opening to control exing movement of the diaphragm into and out of sealing engagement with the annular sealing surface; a coil encircling the tubular guide for operating the armature; a flat annular wall element carried on said housing exterior face and having two parallel fiat faces; said wall element having one of said fiat faces positioned on the aforementioned flat valve housing face with the inner edge area thereof overlying the aforementioned annular flange; a fiat annular plate carried on the other at face of the annular wall element; portions of said plate being cut away and deected out of the plate plane to form a series of circumferentially spaced spring fingers; a cup-shaped housing overlying the coil and having a plurality of circumferentially spaced ears releasably retained between the spring fingers and annular plate.
2. A solenoid valve comprising a valve housing having a flat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the first passage and another opening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular ange overlying the peripheral edge of thediaphragm; an armature slidably positioned in said tubular guide for movements toward and away from the central opening to control exing movement of the diaphragm into and out of sealing engagement with the annular sealing surface; a coil encircling the tubular guide for operating the armature; a flat annular wall element having two parallel flat faces; said wall element having one of said flat faces positioned on the aforementioned flat valve housing face with the inner edge area thereof overlying the aforementioned annular flange; a flat annular plate positioned on'the other fiat face of the annular wall element; circumferentially spaced screws extending through the annular plate and annular wall element into the valve housing for securing the plate and wall element thereon; portions of said plate being cut away and deflected out ofthe plate plane to form a series of circumferentially spaced spring fingers; a cup-shaped housing overlying the coil and having a plurality of circumferentiallyspaced ears releasably retained between the spring fingers and annular plate.
3. A solenoid valve comprising a valve housing having a flat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from 4said face to dene an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the first passage and another opening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular flange 'overlying the peripheral edge of the diaphragm; an armature slidably positioned in said tubular guide for movements tov/ard and away from the central opening to control fiexing movement of the diaphragm into and out of sealing engagement with the annular` sealing surface; a coil encircling the tubular guide for operating the armature; a mounting bracket carried by the valve housing and comprising a mounting wall portion extending angularly from adjacent said housing exterior face and an annular wall portion extending from the mounting wall portion; said annular wall portion having two parallel flat faces; one of said parallel faces being positioned on the aforementioned fiat valve housing face with the inner edge area thereof overlying the aforementioned annular fange; a flat annular' plate carried on the other parallel face of the annular wall portion; por,- tions of said plate being cut away and deflected out of the plate plane to form a series of circumferentially spaced spring fingers; a cup-shaped housing overlying the coil and having a plurality of circumferentially spaced ears releasably retained between the spring fingers and annular plate.
4. A solenoid valve comprising a valve housing having a fiat exterior face; a first passage extending inwardly of said face; an annular passage concentric with said first passage and extending inwardly from said face to define an annular sealing surface; a diaphragm extending across said passages and having a central opening therein in registry with the rst passage and anotheropening therein in registry with the annular passage; a tubular guide in axial registry with the central opening and having an annular fiange overlying the peripheral edge of the diaphragm; an armature slidably positioned in said tubular guidefor movements toward and away from the central openingto control flexing movement of the diaphragm in to and out of sealing engagement with the annular sealing surface; a coil encircling the tubular guide for opcratingthe armature; a mounting bracket for the valve comprising a mounting wall portion extending angularly from adjacent said housing exterior face and an annular wall portion extending from the mounting Wall portion; said annular wall portion having two parallel fiat faces; one of. said parallel faces being positioned on the aforementioned flat valve housing face with the inner edge area thereof overlyingthe aforementionedannular flange; a-at annular plate positioned on the other parallel face. of the annular wall portion; circumferentially spaced screws extending through the annular plate and annular wall element into the valve housing for securing the plate and wall element thereon; portions of said plate being cut away and deflected out of the plate plane to form a series of circumferentially spaced spring fingers; a cup-shaped housing overlying the coil and having a plurality of circumferentially spaced ears releasably retained between the spring ngers and annular plate.
References Cited in the file of this patent UNTTED STATES PATENTS 150,342 Meyer Apr. 28, 1874 639,293 Ritter Dec. 19, 1899 1,137,129 Gold Apr. 27, 1915 2,305,151 Fields Dec. l5, 1942 2,402,360 Bevins June 18, 1946 2,693,930 Carter Nov. 9, 1954 2,761,470 Batts Sept.` 4, 1956 2,768,789 Frey Oct. `3l), 1956 UNITED ySTATES PATENT OFFICE j CERTIFICATE OF CORRECTION p Patent No., 2,946, 551 July 26,- 1960 Julius William Kovach Column 3A, line 7, for "particularly" (SEAL) Attest: ERNEST W- SWIDER Attesting Oicer ARTHUR W. CROCKER Acting Commissioner of Patents
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275033A (en) * 1963-04-03 1966-09-27 American Radiator & Standard Adjustable liquid metering means for shut-off valves
US3300175A (en) * 1964-10-20 1967-01-24 American Radiator & Standard Pilot-operated valve
US3512749A (en) * 1968-03-13 1970-05-19 American Standard Inc Pilot operated valve
US4270726A (en) * 1978-03-09 1981-06-02 Robert Bosch Gmbh Valve arrangement, especially for controlling flow of hot water through a heating device for motor vehicles
US5370354A (en) * 1994-04-01 1994-12-06 Emerson Electric Co. Hermetic solenoid operated valve structure and method of manufacturing the same
US5503362A (en) * 1994-05-31 1996-04-02 Daewoo Electronics Co., Ltd. Water-supply valve of a washing machine
US6149124A (en) * 1999-05-03 2000-11-21 Husco International, Inc. Pilot solenoid control valve with pressure responsive diaphragm
EP3514427A1 (en) 2016-02-22 2019-07-24 Neoperl GmbH Valve actuation device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US150342A (en) * 1874-04-28 Improvement in cans for paint
US639293A (en) * 1897-08-16 1899-12-19 Lunkenheimer Co Sight-feed oil-cup.
US1137129A (en) * 1913-05-16 1915-04-27 Gold Car Heating & Lighting Co Valve.
US2305151A (en) * 1940-08-27 1942-12-15 George C Fields Valve
US2402360A (en) * 1942-12-05 1946-06-18 Bendix Aviat Corp Instrument case
US2693930A (en) * 1949-07-20 1954-11-09 M T Gossett Electromagnetic reversing valve
US2761470A (en) * 1953-04-14 1956-09-04 Carl T Batts Pilot controlled valves
US2768789A (en) * 1953-05-05 1956-10-30 Gen Motors Corp Mixing valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US150342A (en) * 1874-04-28 Improvement in cans for paint
US639293A (en) * 1897-08-16 1899-12-19 Lunkenheimer Co Sight-feed oil-cup.
US1137129A (en) * 1913-05-16 1915-04-27 Gold Car Heating & Lighting Co Valve.
US2305151A (en) * 1940-08-27 1942-12-15 George C Fields Valve
US2402360A (en) * 1942-12-05 1946-06-18 Bendix Aviat Corp Instrument case
US2693930A (en) * 1949-07-20 1954-11-09 M T Gossett Electromagnetic reversing valve
US2761470A (en) * 1953-04-14 1956-09-04 Carl T Batts Pilot controlled valves
US2768789A (en) * 1953-05-05 1956-10-30 Gen Motors Corp Mixing valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275033A (en) * 1963-04-03 1966-09-27 American Radiator & Standard Adjustable liquid metering means for shut-off valves
US3300175A (en) * 1964-10-20 1967-01-24 American Radiator & Standard Pilot-operated valve
US3512749A (en) * 1968-03-13 1970-05-19 American Standard Inc Pilot operated valve
US4270726A (en) * 1978-03-09 1981-06-02 Robert Bosch Gmbh Valve arrangement, especially for controlling flow of hot water through a heating device for motor vehicles
US5370354A (en) * 1994-04-01 1994-12-06 Emerson Electric Co. Hermetic solenoid operated valve structure and method of manufacturing the same
US5503362A (en) * 1994-05-31 1996-04-02 Daewoo Electronics Co., Ltd. Water-supply valve of a washing machine
US6149124A (en) * 1999-05-03 2000-11-21 Husco International, Inc. Pilot solenoid control valve with pressure responsive diaphragm
EP3514427A1 (en) 2016-02-22 2019-07-24 Neoperl GmbH Valve actuation device

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