GB2405682A - Extension fitting for radiator valve control - Google Patents

Extension fitting for radiator valve control Download PDF

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Publication number
GB2405682A
GB2405682A GB0320634A GB0320634A GB2405682A GB 2405682 A GB2405682 A GB 2405682A GB 0320634 A GB0320634 A GB 0320634A GB 0320634 A GB0320634 A GB 0320634A GB 2405682 A GB2405682 A GB 2405682A
Authority
GB
United Kingdom
Prior art keywords
fitting
engaging
control
radiator
radiator valve
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.)
Granted
Application number
GB0320634A
Other versions
GB0320634D0 (en
GB2405682B (en
Inventor
Stig Andreasson
Morten H Christensen
Kuno Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to GB0320634A priority Critical patent/GB2405682B/en
Publication of GB0320634D0 publication Critical patent/GB0320634D0/en
Publication of GB2405682A publication Critical patent/GB2405682A/en
Application granted granted Critical
Publication of GB2405682B publication Critical patent/GB2405682B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1018Radiator valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/60Handles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/01Control of temperature without auxiliary power
    • G05D23/02Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/021Control 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
    • G05D23/023Control 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

Abstract

An extension fitting <B>1</B>, for turning a radiator valve control <B>2</B>, comprising a valve control engaging element <B>4</B>, a turnable hand control <B>6</B> and coupling means connecting the hand control to the engaging element <B>4</B> so that turning the hand control turns the engaging element <B>4</B> characterised in that axial movement of the radiator valve control <B>2</B> is accommodated by the extension fitting <B>1</B> without being transmitted to the hand control <B>6</B>. The axial movement may be accommodated without being transmitted by a sliding key and groove connection between parts of the coupling means. The hand control <B>6</B> may be hollow and have a inside wall which constitutes one part of the coupling means. The coupling means may provide a unique connected orientation of the hand control <B>6</B> and the engaging element <B>4</B>. A spring <B>20</B> may bias the hand control <B>6</B> away from the engaging element <B>4</B>. The engaging element <B>4</B> may be a sleeve shaped to positively engage the radiator valve control <B>2</B>. Also provided are a radiator valve control, especially a thermostatic radiator valve head unit, having such an extension fitting and a radiator, especially a low surface temperature radiator, provided with such a radiator valve control.

Description

1 2405682 Extension fittings for turning radiator valve controls This

invention relates to an extension fitting for turning a radiator valve control, the extension fitting comprising a radiator valve control engaging element for engaging the radiator valve control and turning it about its axis, a burnable hand control for adjusting the radiator valve control at a distance, and coupling means connecting the hand control to the engaging element so that the hand control turns the engaging element.

Central heating radiators of the hot water type are usually controlled by a valve in the inlet pipe to the radiator, a thermostatic head unit being screwed onto the valve to provide temperature control. The user turns a knob at the top of the thermostatic head unit to set the desired temperature.

In some cases, for example in homes for the elderly, the radiator is screened by an outer casing to avoid the danger of accidental injury by prolonged contact with the surface of the radiator. The combination of radiator and outer casing forms what is termed a low surface temperature (LST) radiator unit. When the radiator proper is within an outer casing, some kind of extension fitting is needed to enable the radiator control valve to be operated from the outer casing.

Various proposals have been made for extension fittings of which some examples will now be given.

Patent specification GB 2 312 037 discloses a spindle extension member fitted at one end onto a radiator valve of the type having a spindle which is pushed in to close the valve. A thermostatic radiator head unit is screwed onto the other end of the extension member.

Patent specification EP 0 533 455A discloses a valve spindle extension which has one end secured to the spindle of a radiator valve and at its other end has an operating knob.

Patent specification GB 2 259 758A discloses a coupling in the form of a pair of bellows interconnected by a flexible capillary tube arranged between the thermal head of a conventional thermostatic radiator valve and the valve body of the valve.

The known extension fittings suffer from one or more of the disadvantages that they are relatively expensive to manufacture, are easily damaged during fitting, or create an undesirable gap between the fitting and the outer casing of an LST radiator unit. - 3 -

It is an object of the invention to provide an improved extension fitting which is able to overcome these disadvantages.

The present invention provides an extension fitting for turning a radiator valve control, the extension fitting comprising a radiator valve control engaging element for engaging the radiator valve control and turning it about its axis, a burnable hand control for adjusting the radiator valve control at a distance, and coupling means connecting the hand control to the engaging element so that the hand control turns the engaging element, characterized in that the extension fitting is arranged to accommodate axial movement of the part of the radiator valve control engaged by the engaging element without transmitting the said axial movement to the hand control. Such an extension fitting has the advantage that turning of the radiator valve control can take place without the hand control moving towards or away from the radiator valve control during use. In operation, many radiator valves and thermostatic radiator valve head units exhibit an axial movement of the part turned and if that axial movement were to be communicated to the hand control the latter would shift its position relative to a surrounding surface, in particular the casing of an LST radiator unit. Such a shift in position could result either - 4 in the hand control looking as if it were displaced and therefore broken, or could open up a gap in relation to the surrounding surface. The invention enables such problems to be overcome and, moreover, the extension fitting can be manufactured cheaply as a simple robust unit. The invention also enables any tolerances between the hand control and radiator valve control, which might otherwise lead to disengagement, to be accommodated.

Advantageously, the accommodation of axial movement without transmission of axial movement is provided by at least one key on one part of the coupling means engaging a corresponding axial groove on a second part of the coupling means. By this means, the at least one key and the axial groove can simply slide relative to one another when there is axial movement at the radiator valve control.

Advantageously, the axial groove is defined by the space between two projecting walls. If desired, one or both of the walls can be made discontinuous. These measures provide for economy in the use of material and smooth operation of the fitting.

Advantageously, the hand control is a hollow knob, the inside surface of the knob constituting one or the other parts of the coupling means. Such an arrangement is simple and economical on the use of space.

The inside surface of the knob may have at least one internallyprojecting key. Such an arrangement is simple to produce and economical in the amount of material used.

Preferably, the hollow knob has a plurality of internally projecting keys spaced about the periphery of its inside surface. Such a construction is able to provide greater reliability and better balanced operation.

Advantageously, the keys are spaced substantially uniformly about the said periphery, and means are provided to define a unique assembly orientation of the hand control and engaging element. By this means, assembly errors can be avoided by a simple means.

The means to provide the unique assembly orientation may comprise a key on or one or the other of the hand control and the engaging element mating with a slot on the other component.

Advantageously, the outside surface of the engaging element constitutes one or the other parts of the coupling means. Such a construction is very simple and effective.

Advantageously, a compression spring is provided to bias the hand control away from the engaging element. By this means, the imparting of a feeling of looseness of the parts to the user can be avoided. - 6

The fitting may further include a mounting ring against which the hand control is biased by the said spring. Such a mounting ring provides a simple means of positioning the fitting on the housing of a LST radiator.

Preferably, the hand control has an end section of a first diameter to pass through the mounting ring, and a shoulder to engage the mounting ring. Such a construction is particularly simple and effective.

Preferably, one end of the said spring engages a flange on the outside surface of the engaging element.

The engaging element may be in the form of a sleeve internally shaped to make positive engagement with the radiator valve control.

The invention also provides a radiator valve control provided with an extension fitting as defined above.

The radiator valve control may be a thermostatic radiator valve head unit. Instead, the radiator valve control could be the spindle of a nonthermostatic radiator valve of the type in which the spindle is turned to open or close the valve.

The invention also provides a radiator provided with a radiator valve control as defined above.

The radiator may be an LST (low surface temperature) radiator. 7 -

An extension fitting for turning a radiator valve control in accordance with the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is an exploded side elevational view of an extension fitting embodying the invention; Figure 2 is a side elevation showing the fitting assembled; Figure 3 is a cross-section taken on the line III-III marked in Figure 2; Figure 4 is a plan view from beneath of the fitting shown to a larger scale; and Figures 5A and 5B show the fitting in use with an LST radiator and thermostatic radiator valve head unit.

Referring to the accompanying drawings, an extension fitting 1 is provided for turning a radiator valve control 2. The extension fitting 1 comprises a radiator valve control engaging element 4 of plastics material for engaging - 8 the radiator valve control 2 and turning it about its axis, a burnable hand control 6 of plastics material for adjusting the radiator valve control at a distance, and coupling means connecting the hand control 6 to the engaging element 4 so that the hand control 6 turns the engaging element 4. The extension fitting 1 is arranged to accommodate axial movement, indicated by the double-headed arrow 8, of the part of the radiator valve control 2 engaged by the engaging element 4 without transmitting the said axial movement to the hand control 6.

The accommodation of axial movement without transmission of axial movement is provided by keys 10 on the hand control 6 engaging corresponding axial grooves 12 on the engaging element 4.

Each, axial groove 12 is defined by the space between two projecting walls 13, 14.

The hand control 6 is a hollow knob, the inside surface of the knob 6 constituting one of the parts of the coupling means, namely, the keys 10. The inside surface of the knob has four internally-projecting keys 10 which are spaced uniformly about the said periphery, and means are provided to define a unique assembly orientation of the hand control and engaging element. 9

The means to provide the unique assembly orientation comprise a key 16 on the inner periphery of the knob 6 mating with a slot 18 on the outside of the engaging element 4.

The outside surface of the engaging element 4 defining the walls 13, 14 and the axial groves 12 constitutes the other part of the coupling means.

A compression spring 20 is provided to bias the hand control 6 away from the engaging element 4. A mounting ring 22 of plastics material is provided against which the hand control 6 is biased by the said spring 2 0. The hand control 6 has an end section 24 of a first diameter to pass through the mounting ring 22, and a shoulder 26 to engage the mounting ring 22. The engaging element 4 is provided with a mark (not shown) to be aligned during fitting with a corresponding mark on the radiator valve control to enable correct orientation of the engaging element 4 on the radiator valve control. Suitable markings (not shown) are provided on the hand control 6 and the mounting ring 22 to 2 0 enable the user to perceive the degree of turning of the hand control 6 and thus the radiator setting.

One end 2 8 of the spring 2 0 engages a flange 3 0 on the outside surface of the engaging element 4. -

The engaging element 4 is in the form of a sleeve internally shaped to make positive engagement with the radiator valve control 2. The internal shaping takes the form of a flared generally triangular shape with arcuate sides to the triangle (see Figure 4).

The radiator valve control shown in the drawings is a I thermostatic radiator valve head unit 30 for an LST (low surface temperature) radiator of which the outer housing 32 i is shown in the drawings. The mounting ring 22 is a snap- i fit in an aperture in the housing 32.

The thermostatic radiator valve head unit 30 has a i sensor 34 connected by capillary tubing 36 and is of conventional form and will not therefore be described in detail.

Figure 5A shows the thermostatic radiator valve head unit 30 with its control member so turned that the topmost i part of the valve head is in its lowest position. Figure 5b shows the thermostatic radiator valve head unit 30 with its control member so turned that the topmost part of the valve head is in its highest position. It can be seen that the spacing a to the hand control 6 in Figure 5A is greater than the corresponding spacing b in Figure 5B. On the other hand, the spacing c between the top of the casing 32 and the top of the hand element 6 is exactly the same in both Figures 5A and 5B, the engaging element 4 having slid up inside the hand element 6 against the bias of the spring 20 on turning of the extension fitting 1. It can readily be seen that the spring 20 is more compressed in Figure 5B than in Figure 5A.

Claims (19)

  1. C L A I M S: 1. An extension fitting for turning a radiator valve control,
    the extension fitting comprising a radiator valve control engaging element for engaging the radiator valve control and turning it about its axis, a burnable hand control for adjusting the radiator valve control at a distance, and coupling means connecting the hand control to the engaging element so that the hand control turns the engaging element, characterized in that the extension fitting is arranged to accommodate axial movement of the part of the radiator valve control engaged by the engaging element without transmitting the said axial movement to the hand control.
  2. 2. A fitting as claimed in claim 1, wherein the accommodation of axial movement without transmission of axial movement is provided by at least one key on one part of the coupling means engaging a corresponding axial groove on a second part of the coupling means.
  3. 3. A fitting as claimed in claim 2, wherein the axial groove is defined by the space between two projecting walls.
  4. 4. A fitting as claimed in claim 2 or claim 3, wherein the hand control is a hollow knob, the inside surface of the knob constituting one or the other parts of the coupling means.
  5. 5. A fitting as claimed in claim 4, wherein the inside surface of the knob has at least one internally-projecting key.
  6. 6. A fitting as claimed in claim 5, wherein the hollow knob has a plurality of internally projecting keys spaced about the periphery of its inside surface.
  7. 7. A fitting as claimed in claim 6, wherein the keys are spaced substantially uniformly about the said periphery, and means are provided to define a unique assembly orientation of the hand control and engaging element.
  8. 8. A fitting as claimed in claim 7, wherein the means to provide the unique assembly orientation comprises a key on or one or the other of the hand control and the engaging element mating with a slot on the other component.
  9. 9. A fitting as claimed in any of claims 2 to 8, wherein the outside surface of the engaging element constitutes one or the other parts of the coupling means.
  10. 10. A fitting as claimed in any preceding claim, wherein a compression spring is provided to bias the hand control away from the engaging element.
  11. A fitting as claimed in claim 10, further including a mounting ring against which the hand control is biased by the said spring.
  12. 12. A fitting as claimed in claim 10, wherein the hand 3 control has an end section of a first diameter to pass through the mounting ring, and a shoulder to engage the mounting ring.
  13. 13. A fitting as claimed in any of claims 10 to 12, wherein one end of the said spring engages a flange on the outside surface of the engaging element.
  14. 14. A fitting as claimed in any preceding claim, wherein the engaging element is in the form of a sleeve internally shaped to make positive engagement with the radiator valve control. i
  15. 15. An extension fitting for turning a radiator valve control, the fitting being substantially as herein described with reference to, and as illustrated by, the accompanying drawings.
  16. 16. A radiator valve control provided with an extension fitting as claimed in any preceding claim.
  17. 17. A radiator valve control as claimed in any preceding claim, wherein the radiator valve control is a thermostatic radiator valve head unit.
  18. 18. A radiator provided with a radiator valve control as claimed in claim 16 or claim 17.
  19. 19. A radiator as claimed in claim 18, wherein the radiator is an LST (low surface temperature) radiator.
GB0320634A 2003-09-03 2003-09-03 Extension fittings for radiator valve controls Expired - Fee Related GB2405682B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0320634A GB2405682B (en) 2003-09-03 2003-09-03 Extension fittings for radiator valve controls

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0320634A GB2405682B (en) 2003-09-03 2003-09-03 Extension fittings for radiator valve controls
DE200410041953 DE102004041953B4 (en) 2003-09-03 2004-08-31 Extension piece for turning radiator valve controls
BE2004/0427A BE1016567A5 (en) 2003-09-03 2004-09-02 Extension for parts turn valve control of a heater.
NL1026949A NL1026949C2 (en) 2003-09-03 2004-09-02 Extension fittings for turning radiator valve controls.

Publications (3)

Publication Number Publication Date
GB0320634D0 GB0320634D0 (en) 2003-10-01
GB2405682A true GB2405682A (en) 2005-03-09
GB2405682B GB2405682B (en) 2007-02-14

Family

ID=28686839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0320634A Expired - Fee Related GB2405682B (en) 2003-09-03 2003-09-03 Extension fittings for radiator valve controls

Country Status (4)

Country Link
BE (1) BE1016567A5 (en)
DE (1) DE102004041953B4 (en)
GB (1) GB2405682B (en)
NL (1) NL1026949C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2439655A (en) * 2006-06-29 2008-01-02 David Ronald Boyd Valve control

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1654550A (en) * 1927-02-26 1928-01-03 Hajoca Corp Valve control
GB940585A (en) * 1961-05-13 1963-10-30 Markes & Company Ltd W Improvements relating to taps or cocks for controlling the flow of liquids
GB1321773A (en) * 1971-04-16 1973-06-27 Brown Brownall Ltd Donald Connection for operating rotary valves or cocks
GB1464722A (en) * 1973-02-07 1977-02-16 Barking Brassware Co Fluid flow control valves

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259759A (en) * 1991-09-17 1993-03-24 Blue Circle Heating Ltd Low surface temperature heat radiator
GB2259758B (en) * 1991-09-17 1995-02-15 Blue Circle Heating Ltd Heat radiators
GB2312037B (en) * 1996-04-09 2000-03-29 Blue Circle Heating Ltd Heat radiators
DE19619888C2 (en) * 1996-05-17 2001-07-19 Kermi Gmbh Heater and thermostatic valve and thermostatic head therefor
DE19909096C2 (en) * 1999-03-02 2002-02-07 Danfoss As Heater thermostatic valve top
DE19910224C1 (en) * 1999-03-09 2000-11-30 Heimeier Gmbh Metall Theodor Thermostat head for heating radiator valve has manually adjusted handwheel cap provided with indicator ring secured via interlocking teeth for allowing axial relative displacement during rotation via handwheel cap
DE19916535C2 (en) * 1999-04-13 2002-06-27 Danfoss As Device for the reversible adjustment of a valve tappet
DE20114551U1 (en) * 2001-09-04 2001-11-15 Allmess Schlumberger Gmbh Handle arrangement for a valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1654550A (en) * 1927-02-26 1928-01-03 Hajoca Corp Valve control
GB940585A (en) * 1961-05-13 1963-10-30 Markes & Company Ltd W Improvements relating to taps or cocks for controlling the flow of liquids
GB1321773A (en) * 1971-04-16 1973-06-27 Brown Brownall Ltd Donald Connection for operating rotary valves or cocks
GB1464722A (en) * 1973-02-07 1977-02-16 Barking Brassware Co Fluid flow control valves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2439655A (en) * 2006-06-29 2008-01-02 David Ronald Boyd Valve control
GB2439655B (en) * 2006-06-29 2009-01-07 David Ronald Boyd Control system

Also Published As

Publication number Publication date
GB0320634D0 (en) 2003-10-01
DE102004041953B4 (en) 2006-07-27
DE102004041953A1 (en) 2005-04-28
BE1016567A5 (en) 2007-02-06
NL1026949C2 (en) 2006-08-29
NL1026949A1 (en) 2005-03-07
GB2405682B (en) 2007-02-14

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090903