CA1063992A - Concealed thermostatic valve control - Google Patents
Concealed thermostatic valve controlInfo
- Publication number
- CA1063992A CA1063992A CA266,589A CA266589A CA1063992A CA 1063992 A CA1063992 A CA 1063992A CA 266589 A CA266589 A CA 266589A CA 1063992 A CA1063992 A CA 1063992A
- Authority
- CA
- Canada
- Prior art keywords
- casing
- housing
- conduit
- control valve
- thermostatic control
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
- G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
- G05D23/023—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed outside a regulating fluid flow
-
- 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
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/06—Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Temperature-Responsive Valves (AREA)
- Valve Housings (AREA)
- Control Of Temperature (AREA)
Abstract
ABSTRACT
A thermostatic control valve for regulating the supply of fluid through a conduit including in combination a valve plate and seal in the conduit, the valve plate having a valve stem extending outwards of the conduit with a valve stem having a spring exterior of the conduit to move the valve stem and plate away from the seal and a housing secured to the conduit with a retractable plunger in the housing operative on the valve stem. The plunger is contained in a casing with means in the casing responsive to change in ambient temperature moving the plunger against the valve stem towards the seat. An interior member is threaded in the housing and removable means are provided for attachment to the interior member to rotate it in the housing, the arrangement being such that the threaded interior member and the casing are adapted for contact whereby the rotation of the threaded interior member causes adjustment of the position of the plunger with respect to the seat.
A thermostatic control valve for regulating the supply of fluid through a conduit including in combination a valve plate and seal in the conduit, the valve plate having a valve stem extending outwards of the conduit with a valve stem having a spring exterior of the conduit to move the valve stem and plate away from the seal and a housing secured to the conduit with a retractable plunger in the housing operative on the valve stem. The plunger is contained in a casing with means in the casing responsive to change in ambient temperature moving the plunger against the valve stem towards the seat. An interior member is threaded in the housing and removable means are provided for attachment to the interior member to rotate it in the housing, the arrangement being such that the threaded interior member and the casing are adapted for contact whereby the rotation of the threaded interior member causes adjustment of the position of the plunger with respect to the seat.
Description
Pield of the Invention This invention relates to thermostatically controlled valves for use in locations where it is desirable to provide means for preventing unauthorized adjustment of the valves.
More particularly, the invention relates to thermostatically controlled radiator valves which may not be adjusted without the use of a special key.
Prior Art In recent years it has become common practice to install thermostatic control valves on radiators to provide zone control of the temprature. These valves have a rotatable control head with a numbered setting. The control head is adjusted manually and the numbered setting indicates the degree of change which has been effected over the pre-set position in which the valve is supplied.
Such installations are particularly popular in public buildings and large apartment blocks but a problem arises because unauthorized persons fre~uently rotate the control heads without cause, thus affecting the efficiency of the system. While valves, which may not be unlocked or ;
adjusted without the use of a special key, have been devised for use in controlling the flow of fluids, thermostatically controlled radiator valves having the same feature are unknown.
Summary of the Invention The valve of this invention has a non-rotatable body which incorporates a mechanical temperature sensing element, the operation of which may be adjusted by pressure exerted thereon through a member threaded onto the interior of the valve body, which member can only be rotated by using a removable key. In particular, the mechanical sensing element has a plunger which moves due to change of temperature, the plunger being carried in a casing on which the threaded member exerts the variable pressure.
~063992 ~rief Description of the Drawing The invention will now be described in relation to the accompanying drawing, which is a cross sectional view taken through the valve and removable key.
Description of a Preferred Embodiment Referring now to the drawing, the embodiment of the invention shown herein for illustrative purposes comprises a valve, generally denoted by the numeral 10 and a removable key 12, adapted to adjust the control exercised by the valve 10.
More particularly, the valve 10 comprises an open ended housing 14, with threads 16 at one end adapted for fixed securement of the housing 14 to the threaded spigot 18 of the conduit 20 which contains the liquid flow into a radiator, not shown.
The other end of the housing 14 has a converging wall 22 which merges into an inwardly extending parallel threaded portion 24. A hollow threaded member 26 engages the threaded portion 24. The outward flanged face 28 of the threaded interior member 26 has spaced apart slots 30.
Traversing the flanged face 28 is the casing 32 of a thermostatic sensor generally denoted by the numeral 34. The casing 32 has a flange 36 which bears against the inner surface of the flanged face 28 of the threaded member - ~ -.
26. The thermostatic sensor 34 has a movable plunger 38 which projects from the casing 32 into the housing 14. The plunger 38 is supported in the casing 32 by a surrounding : :
rubber casing 40 which in turn is enveloped by wax 42 contained by the wall of the casing 32. The thermostatic sensor 34 is mechanically sensitive to ambient temperature changes because the movement of the wax 42 expanding or contracting with change in temperature, projects or retracts the plunger 38 from the casing 32.
The free end of the plunger engages the recessed one end of a spring loaded relief cylinder 44 located in the housing 14. For the purposes of assembly of the valve, the relief cylinder 44 is aligned by an inwardly extending abutment 46 provided in the housing 14 which abutment has a channel 48.
The other end of the relief cylinder 44 is also recessed to bearingly locate the free end of a valve stem 50 which is surrounded by a compression spring 52, one end of which bears against a flange 54 on the valve stem 50 which flange 54 is held in place by a spring clip 56.
The other end of the compression spring 52 bears against the wall 58 of the conduit 20. The wall 58 is traversed by a bearing sleeve 60 secured thereto; the valve stem 50 is slidably engaged in the bearing sleeve 60.
The valve stem 50 terminates in a valve plate 62 located in the conduit 20. The upper surface of the valve plate 62 is recessed to carry a rubber seal 64. The conduit 20 has an upwardly extending arcuate half wall 66, upstream of the valve plate 62, which has ~ seal 67 to en-gage .the valve plate 62. Downstream of the valve stem 50 the conduit 20 has a downwardly extending half wall 68 which terminates in a seal 70 adapted to engage the rubber seal 64 of the valve plate 62 on movement of the latter -~
towards the seal 70.
The operation of the valve will be clear in that . . ~
with rise in ambient temperature the plunger 38 acting through the relief cylinder 44 on the spring loaded valve stem 50 moves the valve plate 62 towards the seal 70 thus reducing the flow of liquid to the radiator. When the ambient temperature drops the plunger 38 will retract and the compression spring 52 will cause the valve plate 62 to move away from the seal 70 thus increasing the flow of liquid.
~06399Z
lne remova~le k~y is snown to havc a cross arm 72 Witll nor~ally spaced apart extending arms 74 éach ter-minating in a prong 76 whicn is dimensioned to enter one o~ tne slots 30 located in tne outward flanged face of tne t~readed memDer 26. Wnen the Key 12 is engaged witn tne tnreadea memDer 26 tne latter may ~e rotated thus increasing or decreasing tne effect of movement of the plunger 38 due to cnange in temperature. 'l'nus tne setting of tne sensor can ~e adjusted to change it from the factory setting and in response to the zone conditions. The flanged face 28 of tne tnreaded mem~er is located in the housing 14 in order tnat it may be inconspicuous.
The casing 32 of tne tnermostatic sensor 34 may ~e locatea entirely inside the housing 14; for instance, tne tnreaded memDer 26 could be arranged to act on the flange 36 of tne casing 34 tnrough a surrounding spring.
Tne relief cylinder serves the purpose of alleviating tne pressure exerted ~y tne valve plate on tne seal in tne closure position.
SUPPLEME;'lTARY DISCLOSURE
Tne control valve described above may be secured in a locking manner to thne spigot extending from the conduit, tnus further discouraging tampering with or removal of the control valve. Tnis is achieved by introducing at tne junction of tne control valve and the conduit spigot a supported circular washer having an outwardly extending pawl wnich engages witn inwardly disposed ratchet shaped teetn of a surrounaing ring positioned in the control valve.
Tnis arrangement will now De described in relation to tne accompanying drawings, in wnicn:
Figure 2 is an exploded view of tne spigot, control valve and annular wasner before assembly;
Figure 3 snows the location of the surrounding ratcnet toothed riny in the control valve;
Figurè 4 is a plan view snowing the pawls of annular washer in engagement witn the ratcnet teetn of the ring;
Figure 5 is a view partly in section snowing the location of the engaged annular wasAer and ring in tne connection of tne spigot and control valve.
'rn~ spigot 18 is provided with two pairs of diametri-cally opposed recesses 80 located in the free edge 82, as illustrated in Figure 2. An annular washer, génerally denoted Dy tne numeral 84 and adapted to surround tne valve stem ~0 in spaced relationsnip, has ridges 86 on one surface so tnat each fits into an individual recess 80, therevy locating the position of the annular washer 84 on tne spigot 1~ he annular washer 84 has diametrically opposed -1~ extending pawls 88; preferably the annular washer 84 is made of plastic to provide the requisite degree of pivoting :: .
to tne pawls 88 which are integral witn the annular wasner 84. Tne pawls are recessed at 90 to make them sligntly thin- - -ner tnan tne ~o~y of the annular washer 84. :
Tne housing 14 has an inwardly extending shoulder 92 immediately ~elow tne tihreads 94 as illustrated in Figure 3.
'l~ne sAoulder 92 supports a ring 96, which has inner teetn 98, . ~ -eacn naving one edge inclined to provide a ratchet for engagement witn the pawls 98. Tne shoulder 92 nas an inside diameter less tnan the outside diameter of the annular wasner ~4.
To assemble tne parts, the annular washer 84 is placed on tne spigot 18 with the ridges 86 eacn located in an individual recess 80. The ring 96 is placed on the .
snoulder 92 after which tne nousing 14 is threaded on to the spigot 18, then the pawls 88 engage with the teeth 98.
Further rotation of the housing 14 with respect to the spigot will cause the pawls 88 to advance along the inclined surfaces of teetn 98 until the annular washer 84 engages tne snoulder 9~ he requisite tigntening is tnen effected ~ut in tnis process tne pawls 88, ~eing tninner than the annular washer ~4, and nence removed from tAe shoulder 92, can still function in tne requisite pivoted manner for advancement along tne teeth 98. ~hen assembly is complete tne engagement of the pawls 88 witn the ratcnet teeth 98 ena~ling locking securement of the control valve to the s~iyot.
It will ~e appreciated that the annular washer 84 may only have one pawl 88.
3`~
More particularly, the invention relates to thermostatically controlled radiator valves which may not be adjusted without the use of a special key.
Prior Art In recent years it has become common practice to install thermostatic control valves on radiators to provide zone control of the temprature. These valves have a rotatable control head with a numbered setting. The control head is adjusted manually and the numbered setting indicates the degree of change which has been effected over the pre-set position in which the valve is supplied.
Such installations are particularly popular in public buildings and large apartment blocks but a problem arises because unauthorized persons fre~uently rotate the control heads without cause, thus affecting the efficiency of the system. While valves, which may not be unlocked or ;
adjusted without the use of a special key, have been devised for use in controlling the flow of fluids, thermostatically controlled radiator valves having the same feature are unknown.
Summary of the Invention The valve of this invention has a non-rotatable body which incorporates a mechanical temperature sensing element, the operation of which may be adjusted by pressure exerted thereon through a member threaded onto the interior of the valve body, which member can only be rotated by using a removable key. In particular, the mechanical sensing element has a plunger which moves due to change of temperature, the plunger being carried in a casing on which the threaded member exerts the variable pressure.
~063992 ~rief Description of the Drawing The invention will now be described in relation to the accompanying drawing, which is a cross sectional view taken through the valve and removable key.
Description of a Preferred Embodiment Referring now to the drawing, the embodiment of the invention shown herein for illustrative purposes comprises a valve, generally denoted by the numeral 10 and a removable key 12, adapted to adjust the control exercised by the valve 10.
More particularly, the valve 10 comprises an open ended housing 14, with threads 16 at one end adapted for fixed securement of the housing 14 to the threaded spigot 18 of the conduit 20 which contains the liquid flow into a radiator, not shown.
The other end of the housing 14 has a converging wall 22 which merges into an inwardly extending parallel threaded portion 24. A hollow threaded member 26 engages the threaded portion 24. The outward flanged face 28 of the threaded interior member 26 has spaced apart slots 30.
Traversing the flanged face 28 is the casing 32 of a thermostatic sensor generally denoted by the numeral 34. The casing 32 has a flange 36 which bears against the inner surface of the flanged face 28 of the threaded member - ~ -.
26. The thermostatic sensor 34 has a movable plunger 38 which projects from the casing 32 into the housing 14. The plunger 38 is supported in the casing 32 by a surrounding : :
rubber casing 40 which in turn is enveloped by wax 42 contained by the wall of the casing 32. The thermostatic sensor 34 is mechanically sensitive to ambient temperature changes because the movement of the wax 42 expanding or contracting with change in temperature, projects or retracts the plunger 38 from the casing 32.
The free end of the plunger engages the recessed one end of a spring loaded relief cylinder 44 located in the housing 14. For the purposes of assembly of the valve, the relief cylinder 44 is aligned by an inwardly extending abutment 46 provided in the housing 14 which abutment has a channel 48.
The other end of the relief cylinder 44 is also recessed to bearingly locate the free end of a valve stem 50 which is surrounded by a compression spring 52, one end of which bears against a flange 54 on the valve stem 50 which flange 54 is held in place by a spring clip 56.
The other end of the compression spring 52 bears against the wall 58 of the conduit 20. The wall 58 is traversed by a bearing sleeve 60 secured thereto; the valve stem 50 is slidably engaged in the bearing sleeve 60.
The valve stem 50 terminates in a valve plate 62 located in the conduit 20. The upper surface of the valve plate 62 is recessed to carry a rubber seal 64. The conduit 20 has an upwardly extending arcuate half wall 66, upstream of the valve plate 62, which has ~ seal 67 to en-gage .the valve plate 62. Downstream of the valve stem 50 the conduit 20 has a downwardly extending half wall 68 which terminates in a seal 70 adapted to engage the rubber seal 64 of the valve plate 62 on movement of the latter -~
towards the seal 70.
The operation of the valve will be clear in that . . ~
with rise in ambient temperature the plunger 38 acting through the relief cylinder 44 on the spring loaded valve stem 50 moves the valve plate 62 towards the seal 70 thus reducing the flow of liquid to the radiator. When the ambient temperature drops the plunger 38 will retract and the compression spring 52 will cause the valve plate 62 to move away from the seal 70 thus increasing the flow of liquid.
~06399Z
lne remova~le k~y is snown to havc a cross arm 72 Witll nor~ally spaced apart extending arms 74 éach ter-minating in a prong 76 whicn is dimensioned to enter one o~ tne slots 30 located in tne outward flanged face of tne t~readed memDer 26. Wnen the Key 12 is engaged witn tne tnreadea memDer 26 tne latter may ~e rotated thus increasing or decreasing tne effect of movement of the plunger 38 due to cnange in temperature. 'l'nus tne setting of tne sensor can ~e adjusted to change it from the factory setting and in response to the zone conditions. The flanged face 28 of tne tnreaded mem~er is located in the housing 14 in order tnat it may be inconspicuous.
The casing 32 of tne tnermostatic sensor 34 may ~e locatea entirely inside the housing 14; for instance, tne tnreaded memDer 26 could be arranged to act on the flange 36 of tne casing 34 tnrough a surrounding spring.
Tne relief cylinder serves the purpose of alleviating tne pressure exerted ~y tne valve plate on tne seal in tne closure position.
SUPPLEME;'lTARY DISCLOSURE
Tne control valve described above may be secured in a locking manner to thne spigot extending from the conduit, tnus further discouraging tampering with or removal of the control valve. Tnis is achieved by introducing at tne junction of tne control valve and the conduit spigot a supported circular washer having an outwardly extending pawl wnich engages witn inwardly disposed ratchet shaped teetn of a surrounaing ring positioned in the control valve.
Tnis arrangement will now De described in relation to tne accompanying drawings, in wnicn:
Figure 2 is an exploded view of tne spigot, control valve and annular wasner before assembly;
Figure 3 snows the location of the surrounding ratcnet toothed riny in the control valve;
Figurè 4 is a plan view snowing the pawls of annular washer in engagement witn the ratcnet teetn of the ring;
Figure 5 is a view partly in section snowing the location of the engaged annular wasAer and ring in tne connection of tne spigot and control valve.
'rn~ spigot 18 is provided with two pairs of diametri-cally opposed recesses 80 located in the free edge 82, as illustrated in Figure 2. An annular washer, génerally denoted Dy tne numeral 84 and adapted to surround tne valve stem ~0 in spaced relationsnip, has ridges 86 on one surface so tnat each fits into an individual recess 80, therevy locating the position of the annular washer 84 on tne spigot 1~ he annular washer 84 has diametrically opposed -1~ extending pawls 88; preferably the annular washer 84 is made of plastic to provide the requisite degree of pivoting :: .
to tne pawls 88 which are integral witn the annular wasner 84. Tne pawls are recessed at 90 to make them sligntly thin- - -ner tnan tne ~o~y of the annular washer 84. :
Tne housing 14 has an inwardly extending shoulder 92 immediately ~elow tne tihreads 94 as illustrated in Figure 3.
'l~ne sAoulder 92 supports a ring 96, which has inner teetn 98, . ~ -eacn naving one edge inclined to provide a ratchet for engagement witn the pawls 98. Tne shoulder 92 nas an inside diameter less tnan the outside diameter of the annular wasner ~4.
To assemble tne parts, the annular washer 84 is placed on tne spigot 18 with the ridges 86 eacn located in an individual recess 80. The ring 96 is placed on the .
snoulder 92 after which tne nousing 14 is threaded on to the spigot 18, then the pawls 88 engage with the teeth 98.
Further rotation of the housing 14 with respect to the spigot will cause the pawls 88 to advance along the inclined surfaces of teetn 98 until the annular washer 84 engages tne snoulder 9~ he requisite tigntening is tnen effected ~ut in tnis process tne pawls 88, ~eing tninner than the annular washer ~4, and nence removed from tAe shoulder 92, can still function in tne requisite pivoted manner for advancement along tne teeth 98. ~hen assembly is complete tne engagement of the pawls 88 witn the ratcnet teeth 98 ena~ling locking securement of the control valve to the s~iyot.
It will ~e appreciated that the annular washer 84 may only have one pawl 88.
3`~
Claims (10)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A thermostatic control valve for regulating the supply of fluid through a conduit including in combination a valve plate and seat in said conduit, said valve plate having a valve stem extending outwards of said conduit, said valve stem having spring means exterior of said conduit to move said valve stem and plate away from said seat, a housing secured to said conduit, a retractable plunger in said housing operative on said valve stem, a casing for said plunger, means in said casing responsive to change in ambient temperature moving said plunger against said valve stem towards said seat, an interior member threaded in said housing, removable means for attachment to said interior member to rotate same in said housing, said threaded interior member and casing being adapted for contact whereby rotation of said threaded interior member causes adjustment of the position of said plunger with respect to said seat.
2. A thermostatic control valve according to Claim 1 wherein said interior member has a plurality of recesses facing outward of said housing and said removable member is a key having protuberances for location in said recesses.
3. A thermostatic control valve according to Claim 1 wherein said means in said casing is wax surrounding a rubber casing containing said plunger, the expansion of said wax due to a rise in ambient temperature squeezing said rubber casing and extending said plunger from said casing.
4. A thermostatic control valve according to Claim 1 wherein said threaded member and casing are in contact by co-operating shoulders.
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
5. A thermostatic control valve according to Claim 1 wherein said conduit has a spigot, said housing and said spigot being adapted for threaded connection, an annular washer in said threaded connection, an outwardly extending pawl on said annular washer, a ring surrounding said washer, said ring having inner teeth forming a ratchet, said pawl being engageable with and moveable along said ratchet on tightening of said threaded connection and means in said connection for maintaining the engagement of said washer and said ring.
6. A thermostatic control valve according to Claim 5 wherein said annular washer and said ring are made of plastic.
7. A thermostatic control valve according to Claim 5 wherein said maintaining means is a shoulder in said housing to support said washer and said ring and said washer is removably secured to said spigot.
8. A thermostatic control valve according to Claim 5 wherein said annular washer has a pair of diametrically opposed pawls engageable with said ratchet.
9. A thermostatic control valve according to Claim 5 wherein said pawl is thinner than said annular washer.
10. A thermostatic control valve according to Claim 7 wherein said washer has ridges on one face and said spigot has recesses adapted to recieve said ridges in removable securement.
Priority Applications (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA266,589A CA1063992A (en) | 1976-11-25 | 1976-11-25 | Concealed thermostatic valve control |
| US05/850,691 US4176786A (en) | 1976-11-25 | 1977-11-11 | Concealed thermostatic control valve |
| DE19777734972 DE7734972U1 (en) | 1976-11-25 | 1977-11-15 | THERMOSTAT VALVE |
| DE19772750956 DE2750956C2 (en) | 1976-11-25 | 1977-11-15 | Thermostatic control valve |
| GB4805177A GB1560040A (en) | 1976-11-25 | 1977-11-18 | Concealed thermostatic control valve |
| AT825877A AT378833B (en) | 1976-11-25 | 1977-11-18 | THERMOSTAT VALVE, ESPECIALLY RADIATOR VALVE |
| SE7713218A SE432819B (en) | 1976-11-25 | 1977-11-23 | THERMOSTAT VALVE |
| CH1435477A CH630188A5 (en) | 1976-11-25 | 1977-11-23 | Thermostatic control valve |
| DK521877A DK154912C (en) | 1976-11-25 | 1977-11-24 | THERMOSTAT CONTROLLED VALVE VALVE |
| NL7712951A NL176202C (en) | 1976-11-25 | 1977-11-24 | THERMOSTATIC CONTROL VALVE. |
| BE182947A BE861225A (en) | 1976-11-25 | 1977-11-25 | THERMOSTATIC CONTROL VALVE |
| FR7735600A FR2372367A1 (en) | 1976-11-25 | 1977-11-25 | HIDDEN ADJUSTMENT THERMOSTATIC CONTROL VALVE |
| JP14142577A JPS53134235A (en) | 1976-11-25 | 1977-11-25 | Temperature controlling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA266,589A CA1063992A (en) | 1976-11-25 | 1976-11-25 | Concealed thermostatic valve control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1063992A true CA1063992A (en) | 1979-10-09 |
Family
ID=4107365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA266,589A Expired CA1063992A (en) | 1976-11-25 | 1976-11-25 | Concealed thermostatic valve control |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS53134235A (en) |
| AT (1) | AT378833B (en) |
| BE (1) | BE861225A (en) |
| CA (1) | CA1063992A (en) |
| CH (1) | CH630188A5 (en) |
| DE (2) | DE2750956C2 (en) |
| DK (1) | DK154912C (en) |
| FR (1) | FR2372367A1 (en) |
| GB (1) | GB1560040A (en) |
| SE (1) | SE432819B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0124629B1 (en) * | 1983-05-05 | 1986-07-02 | Honeywell-Braukmann GmbH | Theft protection for a radiator valve thermostat |
| GB8512971D0 (en) * | 1985-05-22 | 1985-06-26 | Concentric Controls Ltd | Thermostatic gas valve |
| JPH03104579U (en) * | 1990-02-15 | 1991-10-30 | ||
| DE4223217C1 (en) * | 1992-07-15 | 1993-12-02 | Heimeier Gmbh Metall Theodor | Safety spring mounting for thermostatic control valve - has plastics sleeve housing for spring loaded plunger and includes seal on flanged open end. |
| CN103913078A (en) * | 2014-04-16 | 2014-07-09 | 曾建 | High-temperature waste gas heat recycling device |
| DK3255351T3 (en) * | 2016-06-10 | 2018-11-19 | Danfoss As | Actuator device and method of removing an actuator device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2628781A (en) * | 1949-04-22 | 1953-02-17 | Crane Co | Thermostatic mixing valve |
| GB692949A (en) * | 1950-11-04 | 1953-06-17 | Prestone Cookers Ltd | Improvements in or relating to pressure release valves |
| AT243585B (en) * | 1962-12-20 | 1965-11-25 | Danfoss As | Thermostatically operated valve |
| US3422840A (en) * | 1966-01-17 | 1969-01-21 | Grove Valve & Regulator Co | Relief valve with resilient seal means |
| AT307707B (en) * | 1968-10-14 | 1973-06-12 | Anger Plastic Gmbh | Device for filling and degassing of extruders or the like continuously charged with powder or granulate. |
| US3821975A (en) * | 1972-11-16 | 1974-07-02 | L Haker | Automotive wheel lock means |
| DE2308453C3 (en) * | 1973-02-21 | 1981-06-11 | Gustav Wahler Gmbh U. Co, 7300 Esslingen | Valve for temperature-dependent control of a gaseous or liquid medium |
| DE2405488A1 (en) * | 1974-02-02 | 1975-08-14 | Vaillant Joh Kg | Thermostatic valve for central heating installations - has valve plug operated by a thermostat which can be removed so that valve can be controlled manually |
| DK450075A (en) * | 1974-10-22 | 1976-04-23 | F Christiansson | THERMOSTATE UNIT FOR CENTRAL HEATING RADIATORS |
| DE2603461C3 (en) * | 1976-01-30 | 1978-07-27 | Danfoss A/S, Nordborg (Daenemark) | Thermostatic control valve |
-
1976
- 1976-11-25 CA CA266,589A patent/CA1063992A/en not_active Expired
-
1977
- 1977-11-15 DE DE19772750956 patent/DE2750956C2/en not_active Expired
- 1977-11-15 DE DE19777734972 patent/DE7734972U1/en not_active Expired
- 1977-11-18 AT AT825877A patent/AT378833B/en not_active IP Right Cessation
- 1977-11-18 GB GB4805177A patent/GB1560040A/en not_active Expired
- 1977-11-23 CH CH1435477A patent/CH630188A5/en not_active IP Right Cessation
- 1977-11-23 SE SE7713218A patent/SE432819B/en not_active IP Right Cessation
- 1977-11-24 DK DK521877A patent/DK154912C/en not_active IP Right Cessation
- 1977-11-25 FR FR7735600A patent/FR2372367A1/en active Granted
- 1977-11-25 BE BE182947A patent/BE861225A/en not_active IP Right Cessation
- 1977-11-25 JP JP14142577A patent/JPS53134235A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE7734972U1 (en) | 1980-06-12 |
| JPS53134235A (en) | 1978-11-22 |
| DE2750956A1 (en) | 1978-06-08 |
| SE432819B (en) | 1984-04-16 |
| CH630188A5 (en) | 1982-05-28 |
| DK154912B (en) | 1989-01-02 |
| SE7713218L (en) | 1978-05-26 |
| DE2750956C2 (en) | 1985-09-12 |
| FR2372367B1 (en) | 1984-08-17 |
| BE861225A (en) | 1978-03-16 |
| DK521877A (en) | 1978-05-26 |
| AT378833B (en) | 1985-10-10 |
| FR2372367A1 (en) | 1978-06-23 |
| DK154912C (en) | 1989-06-05 |
| ATA825877A (en) | 1985-02-15 |
| GB1560040A (en) | 1980-01-30 |
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