US2702052A - Throttling snap-action valve - Google Patents

Throttling snap-action valve Download PDF

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US2702052A
US2702052A US393788A US39378853A US2702052A US 2702052 A US2702052 A US 2702052A US 393788 A US393788 A US 393788A US 39378853 A US39378853 A US 39378853A US 2702052 A US2702052 A US 2702052A
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Prior art keywords
snap
closure
main
supplemental
valve
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US393788A
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Richard D Grayson
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General Controls Co
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General Controls Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/02Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/06Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms
    • F23N5/067Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms using mechanical means
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/01Control of temperature without auxiliary power
    • G05D23/12Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid
    • G05D23/125Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow
    • G05D23/126Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube
    • G05D23/127Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube to control a gaseous fluid circulation
    • G05D23/128Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube to control a gaseous fluid circulation the fluid being combustible
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86928Sequentially progressive opening or closing of plural valves
    • Y10T137/87016Lost motion
    • Y10T137/8704First valve actuates second valve
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87265Dividing into parallel flow paths with recombining
    • Y10T137/87338Flow passage with bypass
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87265Dividing into parallel flow paths with recombining
    • Y10T137/87378Second valve assembly carried by first valve head

Description

UnitedStates Patent 2,702,052 THROTTLING SNAP-ACTION VALVE Richard D. Grayson, La Canada, Calif., assignor to General Controls Co., Glendale, Calif., a corporation of California Application November 23, 1953, Serial No. 393,788

Claims. (Cl..137630.22)

This invention relates to valve structures of the type which employs over-center snap-action means for operating the valve and means movable gradually in response to variation of a controlling condition, such as pressure or temperature, for actuating the snap-action means.

In the operation of conventional snap-action means from one to the other of its snapped positions there IS considerable preliminary movement of the means before dead-center position is reached, which movement normally serves no useful purpose. It is an ob ect of this invention to take advantage of one phase of this preliminary movement of the snap-action means and to apply it to the valve so as to effect gradual throttling of the flow. I

Another object of this invention is to provide a valve structure, of the character described and incorporating the feature described in the preceding paragraph, which comprises a main valve and a supplemental valve operated in sequence by the snap-action means and arranged so that both of the valves are snapped substantially simultaneously from closed to fully-open position, while, in

subsequent closing operation of the valves, the main valve is closed gradually and the supplementalvalve is maintained fully-open until it is snapped to closed pos1- tion when the snap-action means passes over-center.

A valve structure as described in the preceding paragraph has particular utility for controlling flow of fuel gas to a main burner. The supplemental valve then serves, when the-main valve is closed, to supply gas at an adjusted constant rate sufiicient only for low-fire operation of the particular burner, and normally snaps closed only if the weather is so mild that the heat produced by the low-fire is in excess of that required. The

full flow of gas passing to the burner through both of v appreciation of its features and advantages, reference is to be had to the following detailed description and.

accompanying drawing, and to the appended claims.

In the drawing: Figure. l is a more-or-less diagrammat c showmg, in

section, of a valve structure embodying this invention;

Figures 2 and 3 are views of the upper part of the valve structure of Fig. 1 showing the parts in different positions assumed in operation; and

Figure 4 is a view, similar to that of F1g. 3, showing a modified valve structure according to the invention.

Referring first more particularly to Fig. 1 of the drawing, the numeral 11 indicates a valve casing having an inlet 12 which leads to a shallow cylindrical chamber 13 defined at its top by a screw cap 14. In the bottom of chamber 13 is a cylindrical port 15 which is connected by a branch opening 16 with the outlet 17 of the casing. Raised around the upper end of port 15 is an annular valve seat 18 upon which a generally (llSklike main closure 19 normally rests. In the upper part of closure 19'is a recess 20 and fitting tightly m the I top of this recess is a centrally apertured disk 21, re-

an annular seat 23 upon which a disk-like supplemental By providing a separate valve for low- Patented Feb. 15, 1955 2 closure 24 normally rests. The main closure 19 is biased to seated position by the force of a spring 25 compressed between disk 21 and the cap 14, the supplemental closure 24 likewise being biased to seated position by the force of a relatively weak spring 26 compressed between it and the cap and extending through the central aperture in disk 21.

Slidable in a central opening through the bottom wall of recess 20 is a hollow cylindrical driving member 27 which is guided in the neck of a funnel-like inward extension 28 of the casing, which extension separates the upper and lower interior parts of the casing. In the hollowcylindrical part of the casing below extension 28 are conventional over-center snap-action means for operating member 27. These means comprise a dished snap-disk 29 and a pusher member 30 having an annular knife-edged projection 31 engaging the underside of the snap-disk immediately adjacent its periphery and forcing the top surface of the disk against an annular knife-edged projection 32 provided around the base of extension 28, and engaging the disk on a circle concentric with but smaller than that defined by projection 31. In Fig. '1 the pusher member 30 is shown in upwardlymoved position and disk 29-snapped to corresponding shape, the normal or unstressed shape of the disk being that shown in Fig. 2. A screw 33 threaded in the closed bottom of driving member 27 provides an adjustable connection between the member and disk 29.

'For actuating the snap-action means, means of j the type adapted to move gradually in response to variation of a controlling condition, such as temperature or pressure, are provided. The particular means shown herein by way of example comprise an expansible-contractible bellows member 34 and a remote thermal bulb 35 which are interconnected by a capillary tube 36 (extending through a slot 37 in the side of the casing) and charged with the usual expansible fluid. The top end of the bellows member fits in a shallow recess in the underside of a plunger. 38 slidable within the cylindrical lower part of the casing and sealed at its, periphery by an O- ring 39. The bellows member is supported at its bottom by a screw 40 threaded in an opening through a screw cap 41 covering the bottom of the casing, a knob 42 being provided for adjusting the screw in accordance with the desired setting of the bellows system. On the top of plunger 38 is a conical projection 43 engageable with the pusher member 30 of the snap-action means.

The operation of the valve structure shown in Figs. 1-3 will be described in connection with the control of supply of fuel gas to a main burner indicated in Fig. l

' by numeral 44 and for the igniting of.which a continuously burning pilot burner 45 is provided, it being assumed that the thermal bulb 35 is then arranged to respond to the temperature of a space heated by the main burner.

In Fig. 1 the parts are shown in the positions assumed when the requirement for heating is satisfied, so that the bellows 34 is expanded and snap-disk 29 so flexed that the, driving member 27 is in a fallen position and the tip of this member spaced by a considerable distance from the supplemental closure 24. Both the supplemental closure and the main closure 19 are therefore seated under the force of springs 26 and 25 so that flow from the inlet chamber 13 is completely obstructed.

In response to fall of space temperature bellows 34' contracts and in so doing permits flattening of the snapdisk under itsown resilience so that the driving member 27 is moved gradually upwards. The arrangement is such that this member is free from engagement with supplemental closure 24 until the snap-disk is forced beyond its dead-center or. flat position and consequently moves suddenly past-center to assume its alternate dished shape as shown in Fig. 2.- In the corresponding sudden upward movement of the driving member and the supplemental closure the latter engages a disk 21 (fixed to the main closure 19) and by continued movement forces the main closure away from its seat. The parts are then in the positions shown in Fig. 2 wherein, as indicated by the arrows in that figure, gas can flow to the main burner from inlet chamber 13, not only past the main valve seat 18, but also in a supplemental path: through the opening 22, past the supplemental valve seat 23, through openings 46 and 47 in the hollow driving member, openings 48 in disk 29 and openings 49 in pusher member 30 to the space below that member, and thence by way of openings 50 and 51 in the casing to outlet 17. The gas now flowing in large amount to the main burner is readily ignited by the pilot burner, and a high-fire condition is established.

When, because of the high fire, the space temperature then rises, bellows 34 expands causing the center of the snap disk to fall so that, under the force of springs 25 and 26, the driving member and the closure assembly move downwards and the space between the main closure and its seat 18 is gradually reduced so that fiow to the main burner is throttled. When, by this movement, the main closure finally engages its seat, flow through the casing. is restricted to the supplemental path described in the preceding paragraph, the parts then being in the positions shown in Fig. 3. The rate of this flow can be adjusted by manipulation of a flow restrictor 52, provided in opening 50 and accessible at the enterlor of the casing, to determine the low-fire setting suitable for the particular main burner employed. It Will. be observed that when the main closure seats, the snap disk is close to, but still above, its dead-center or fiat position.

In operation of the system while the weather IS relatively cold, the main closure normally remains within its throttling range, moving gradually in either direction between fully-open and closed position in accordance with the heating requirements of the space. The supplemental path for restricted fiow' of gas sufiicient only for minimum low-fire operation of the burner permits such full-range operation of the 'main valve.

When, however, the weather is mild and even the small amount of heat produced by the low fire is in excess of requirements, continued rise of space temperature effects such movement of the snap disk that it finally reaches dead-center position and then snaps past-center to the position shown in Fig. 1 wherein flow to the main burner is completely obstructed.

In this movement of the snap disk toward dead-center (from the position of Fig. 3) the supplemental closure 24 moves slightly downwards toward its seat under the force of spring 26. However, the screw 33 at the bottom of the driving member is adjusted so that until the supplemental valve finally snaps closed its flow capacity is still considerably in excess of theflow capacity of the restricted opening 50 because of the large diameter of the supplemental seat 23.

When, in its throttling movements, the main closure seats, the force of spring 25 is relieved so that, especially since spring 26 is relatively weak, there is then considerably less force acting downwardly on the snapdisk and the bellows. It has been found that because of this reduction of force the space temperature must then rise proportionately higher before the snap action occurs, so that there is less frequent shut-off of the main burner.

The simplified form of the invention shown in Fig. 4 (and wherein the parts are in the same operative positions as in Fig. 3) differs materially from that of Figs. l3 only in that the driving member, instead of being hollow, is a solid rod 60, and a fixed resistor 61, threaded in an opening through the main closure 19', is provided for the supplemental flow through the casing as indicated by the arrows. The operation of the valve structure of Fig. 4 is obviously the same as that described above in connection with the structure of Figs. l-3. To change the rate of supplemental flow, the restrictor 61 is removed and another restrictor of suitable flow-capacity substituted.

The specific embodiments of my invention herein shown and described are obviously susceptible of modification without departing from the spirit of the invention, and I intend therefore to be limited only by the scope of the appended claims.

I claim as my invention:

1. In a valve structure: a main valve and a supplemental valve; a connection for operating said valves in such sequence that the supplemental valve opens before the main valve opens and subsequently closes after the main valve closes; over-center snap-action means for operating said connection; means for applying force to said snapaction means so as to effect gradual movement of the same toward its dead-center position in alternate directions; and lost-motion means in said connection arranged taneously from closed to full-open positiomsaid connection being such that subsequent closing operation of the valves effects, before the snap-action means reaches dead-center position, gradual closing of the main valve and maintenance of the supplemental valve in substantially full-open position until the snap-action means reaches dead-center.

2. In a valve stru ture; a casing having a main passage and a restricted passage for flow through the casing to a common outlet; a main valve and a supplemental valve for controlling flow through said main passage and said restricted passage, respectively; means, including overcenter snap-action means, for operating both of said valves; and means movable gradually in response to variation of a controlling condition for actuating said operating means; said operating means being adapted to effect. when actuated in response to variation of said condition in one sense, snap-action operation of both of the valves directly from closed to fully-open position, and, upon subsequent variation of the condition in the opposite sense and before said snap-action means reaches dead-center position, gradual closing of said main valve to throttle flow through said main passage, and, with continued variation of the condition in said opposite sense after the main valve is fully closed, snap-action closing of the supplemental valve when the snap-action means passes overcenter; the flow capacity of the supplemental valve prior to its snap-action closing being greater than that of said restricted passage.

3. In a valve structure: a casing having a main passage and a restricted passage for flow through the casing to a common outlet; a main valve and a supplemental valve 'for controlling flow through said main passage and said restricted passage, respectively; over-center snap-action means; means movable gradually in response to variation of a controlling condition for actuating said snap-action means; and a connection for transmitting movements of the snap-action means to said valves so that snap-action operation of both of the valves directly from closed to fully-open position is effected when the snap-action means snaps over-center with variation of said condition in one sense; said connection being arranged to effect such sequential operation of the valves that upon subsequent variation of the condition in the opposite sense, and before the snap-action means reaches dead-center position, the main valve is operated gradually toward closed position to throttle fiow through said main passage, and only upon continued variation of the condition in said opposite sense after the main valve is fully closed does snap-action closing of the supplemental valve occur when the snap-action means again passes over-center; the flow capacity of the supplemental valve prior to its snap-action closing being greater than that of said restricted passage.

4. In a valve structure: a casing having a main passage and a restricted passage for flow through the easing to a common outlet; a main valve and a supplemental valve for controlling flow through said main passage and said restricted passage, respectively; means biasing both of said valves to closed position; over-center snap-action means; means movable gradually in response to variation of a controlling condition for actuating saidsnap-action means; means for transmitting movement of the snapaction means to said supplemental valve so that when the snap-action means snaps over-center with variation of said condition in one sense the supplemental valve is moved suddenly from closed to fully-open position; and

a lost-motion connection between the supplement valve and the main valve such that continued movement of the supplemental valve from said fully-open position under the force of the snap-action means efiects opening of the main valve; said movement-transmitting means being arranged to efiect, upon subsequent variation of said condition in the opposite sense and before the snap-action means reaches dead-center position, gradual closing of the main valve under the force of its bias while the supplemental valve is still fully open, and, with continued variation of the condition in said opposite sense, sudden movement of the supplemental valve under the force of its bias from substantially fully-open to closed position when the snap-action means again passes over-center.

5. In a valve structure: a valve casing having a. main passage and a restricted passage for flow through the casing to a common outlet; a valve seat in said main passage; a main closure mounted for movement normal s hat both of said valves are snapped substantially simulto said seat out of and into engagement with the seat to control flow through the main passage, and biasedjo seated position; said main closure having an opening therethrough forming, at least in part, said restricted passage; a supplemental closure controlling fiow through said opening and biased to closed position; over-center snap-action means; means movable gradually in response to variation of a controlling condition for actuating said snap-action means; means for transmitting movement of the snap-action meansto said supplemental closure so that when the snap-action means snaps over-center with variation of said condition in one sense the supplemental closure is moved suddenly from closed to fully-open position; and a lost-motion connection between the supplemental closure and the main closure such that continued movement of the supplemental closure under the force of the snap-action means effects full-opening of the main closure; said movement-transmitting means being arranged to effect, upon subsequent variation of said condition in the opposite sense and before the snap-action means reaches dead-center position, gradual seating of the main closure under the force of itsbias while the supplemental closure is still fully open, and, with continued variation of the condition in said opposite sense, sudden movement of the supplemental closure under the force of its bias from substantially fully-open to closed position when the snap-action means again passes over-center.

6. In a valve structure: a casing having a passage therethrough provided with a valve seat; a main closure mounted for movement normal to said seat out of and into engagement with the seat to control flow to the outlet of the casing, and biased to seated position; said main closure having an opening through which fluid can pass through the casing to said outlet when the main closure is seated; a supplemental closure mounted for movement out of and into seating engagement with the main closure to control flow through said opening, and biased to seated position; a first lost-motion connection, between said closures, arranged so that continued movement of the supplemental closure after it is moved to open position effects movement of the main closure to open position; over-center snap-action means; means, including a second lost-motion connection, for transmitting movement of said snap-action means to the supplementalclosure; and means movable gradually in response to variation of a controlling condition for actuating j said snap-action means; said second lost-motion connection being arranged so that upon variation of said condition in one sense both of the closures are moved suddenly by the snap-action means from seated to fully-open position; said movementtransmitting means being arranged to efiect, upon subsequent variation of the condition in the opposite sense and before the snap-action means reaches dead-center position, gradual seating of the main closure under the force of its bias while the supplemental closure is still fully open, and, with continued variation of the condition in said opposite sense, maintenance of the supplemental closure in substantially fully-open position until the snapaction means again passes over-center and thereby effects snap-action closing of the supplemental closure.

7. In a valve structure: a casing having a passage therethrough provided with a valve seat; a disk-like main closure movable out of and into engagement with said seat to control flow to the outlet of the casing; a main spring biasing the main closure to seated position; the main closure having an opening therethrough communicating with said outlet when-the main closure is seated; a disk-like supplemental closure at the side of the main closure away from said seat and movable out of and into engagement with the main closure to uncover and cover said opening; a supplemental spring biasing the supplemental closure to seated position; an elongated driving member having an end portion projectable through said opening into operative engagement with the supplemental closure; a lost-motion connection between the closures arranged so that movement of the supplemental closure in a direction away from its seat efiects subsequent unseating movement of the main closure; over-center snapaction means for operating said driving member; and

' means movable gradually in response to variation of a controlling condition for actuating said snap-action means; said driving member being of such length that when operated by the snap-action means in a direction toward the supplemental closure it is out of engagement with the supplemental closure until the snap-action means passes over-center; the amount of past-center movement of the snap-action means being suflicient to thenefiect sudden movement of both closures to fully-open position, and, upon subsequent movement of the snap-action means in the opposite direction, gradual movement of the main closure to seated position and then sudden release of the supplemental closure, while the same is in substantially fully-open position, when the snap-action means again passes over-center.

8. In a valve structure: a casing having a main passage therethrough provided with a valve seat; a disklike main closure movable out of and into engagement with said seat to control flow to the outlet of the casing; a main spring biasing the main closure to seated position; a disk-like supplemental closure at the side of the main closure away from said seat andmovable out of and into seating engagement with the main closurecentrally thereof; a supplemental spring biasing the supplemental closure to seated position; the main closure having a central opening therethrough; an elongated driving member in said opening and slidably fitting the same, said member having an end portion operatively engageable with the supplemental closure; said member being hollow so that fluid can enter it when the supplemental closure is in open position; means defining a supplemental passage, separate from said main passage, interconnecting the hollow of the member and said outlet: 21 lost-motion connection between the closures arranged so that movement of the supplemental closure in a direction away from its seat effects subsequent unseating movement of the main closure; over-center snap-action means for operating said driving member; and means movable graduallyiin response to variation of a controlling condition for actuating said snap-action means; the member being of such length that when operated by the snap-action means in a direction toward the supplemental closure it is out of engagement with the same until the snap-action means passes over-center; the amount of past-center movement of the snap-action means being suflicient to then effect sudden movement of both closures to fully-open position, and, upon subsequent movement of the snap-action means in the opposite direction, gradual movement of the main closure to seated position and then sudden release of the supplemental closure, while the same is in substantially fully-open position, when the snap-action means again passes over-center.

9; A valve structure according to claim 8, and including an adjustable fiow-restrictor in said supplemental passage and accessible at the exterior of the casing.

10. In a valve structure: a casing havinga passage therethrough provided with a valve seat; a disk-like main closure movable out of and into engagement with said seat to control flow to the outlet of the casing; a main spring biasing the main closure to seated position; the main closure having a restricted opening therethrough communicating with said outlet when the main closure is seated; a disk-like supplemental closure at the side of the main closure away from said seat and movable out of and into engagement with the main closure to control flow through said restricted opening; a supplemental spring biasing the supplemental closure to seated position; the main closure having also a central opening therethrough; an elongated driving member in said central opening and slidably fitting the same, said member having an end portion operatively engageable with the supplemental closure; a lost-motion connection between the closures arranged so that movement of the supplemental closure in a direction away from its seat effects subsequent unseating movement of the main closure; over-center snap-action means for operating said driving member; and means movable gradually in response to variation of a controlling condition for actuating said snap-action means; the member being of such length that when operated in a direction toward the supplemental closure it is out of engagement with the same until the snap-action means passes over-center; the amount of past-center movement of the snap-action means being suflicient to then etfect sudden movement of the closures to fully-open position, and, upon subsequent movement of the snap-action means in the opposite direction, gradual movement of the main closure to seated position and sudden release of the supplemental closure while the same is in substantially fully-open position.

No references cited.

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807423A (en) * 1955-01-19 1957-09-24 Dole Valve Co Gas oven thermostatic valve
US2873070A (en) * 1954-12-20 1959-02-10 Dole Valve Co Double opening waterline thermostat
US2889115A (en) * 1955-05-19 1959-06-02 Robertshaw Fulton Controls Co Temperature control for cooking appliances
US2889990A (en) * 1957-03-20 1959-06-09 Honeywell Regulator Co Thermostatic valve
DE1077165B (en) * 1953-10-29 1960-03-10 Robertshaw Fulton Controls Co Valve device for burner
US2936784A (en) * 1954-06-02 1960-05-17 Vaillant Joh Kg Gas tap mechanism
US2950865A (en) * 1956-08-20 1960-08-30 Harper Wyman Co Thermostatic control apparatus for a burner
US2986369A (en) * 1958-09-08 1961-05-30 Honeywell Regulator Co Step opening solenoid valve
US2991012A (en) * 1961-07-04 Thermostatic control valve
US2993646A (en) * 1958-08-22 1961-07-25 Robertshaw Fulton Controls Co Combined temperature regulator and flame failure control
US3004712A (en) * 1960-05-20 1961-10-17 American Radiator & Standard Snap-action thermostatic valve
US3051246A (en) * 1959-04-13 1962-08-28 Baker Oil Tools Inc Automatic fluid fill apparatus for subsurface conduit strings
US3052264A (en) * 1958-09-26 1962-09-04 Robertshaw Fulton Controls Co Control valve
US3058665A (en) * 1959-12-24 1962-10-16 Gen Controls Co Top burner control for gas ranges
US3118471A (en) * 1958-09-26 1964-01-21 Robertshaw Controls Co Control valve
US3159346A (en) * 1962-11-29 1964-12-01 Robertshaw Controls Co Control valves for a domestic water heater
US3367571A (en) * 1965-10-21 1968-02-06 Wantz Clarence Fuel control means
US3417918A (en) * 1967-06-21 1968-12-24 Controls Co Of America Gas control snap acting and modulating valve assembly
US3596872A (en) * 1970-02-25 1971-08-03 Itt Valve assembly
US4203545A (en) * 1978-08-07 1980-05-20 M & W Gear Company Thermostatically responsive valve mechanism
US4564132A (en) * 1984-02-24 1986-01-14 Scholle Corporation Fluid dispensing assembly
US8640733B1 (en) 2012-10-09 2014-02-04 Brasscraft Manufacturing Company Excess flow cartridge
US8875725B2 (en) 2012-10-09 2014-11-04 Brasscraft Manufacturing Company Fluid connector with integrated excess flow valve
US9383025B2 (en) 2013-12-16 2016-07-05 Brasscraft Manufacturing Company Excess flow valve with cage

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* Cited by examiner, † Cited by third party
Title
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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991012A (en) * 1961-07-04 Thermostatic control valve
DE1077165B (en) * 1953-10-29 1960-03-10 Robertshaw Fulton Controls Co Valve device for burner
US2936784A (en) * 1954-06-02 1960-05-17 Vaillant Joh Kg Gas tap mechanism
US2873070A (en) * 1954-12-20 1959-02-10 Dole Valve Co Double opening waterline thermostat
US2807423A (en) * 1955-01-19 1957-09-24 Dole Valve Co Gas oven thermostatic valve
US2889115A (en) * 1955-05-19 1959-06-02 Robertshaw Fulton Controls Co Temperature control for cooking appliances
US2950865A (en) * 1956-08-20 1960-08-30 Harper Wyman Co Thermostatic control apparatus for a burner
US2889990A (en) * 1957-03-20 1959-06-09 Honeywell Regulator Co Thermostatic valve
US2993646A (en) * 1958-08-22 1961-07-25 Robertshaw Fulton Controls Co Combined temperature regulator and flame failure control
US2986369A (en) * 1958-09-08 1961-05-30 Honeywell Regulator Co Step opening solenoid valve
US3118471A (en) * 1958-09-26 1964-01-21 Robertshaw Controls Co Control valve
US3052264A (en) * 1958-09-26 1962-09-04 Robertshaw Fulton Controls Co Control valve
US3051246A (en) * 1959-04-13 1962-08-28 Baker Oil Tools Inc Automatic fluid fill apparatus for subsurface conduit strings
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US8640733B1 (en) 2012-10-09 2014-02-04 Brasscraft Manufacturing Company Excess flow cartridge
US8875725B2 (en) 2012-10-09 2014-11-04 Brasscraft Manufacturing Company Fluid connector with integrated excess flow valve
US9383025B2 (en) 2013-12-16 2016-07-05 Brasscraft Manufacturing Company Excess flow valve with cage

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