Expanding Fluid Patents (Class 236/42)
  • Patent number: 9151497
    Abstract: A gas regulator fitting is to be devised that prevents distortions of the temperature value to be regulated caused by ambient temperature fluctuations. Retrofitting without intervention into the gas-conducting space is also to be made possible. To that end, one or more bimetal discs (17) are arranged outside the gas-conducting space of the gas regulator fitting, between an operating element (18) for setting the required temperature and a longitudinally movable ram (8) whose position can be altered by means of metal bellows (9) which are connected to a temperature sensor (11) by a capillary line (10). The ram (8) protruding into the gas-conducting space activates a switch which controls a valve for regulating the gas stream to the main burner. The bimetal discs (17) are arranged in such a manner that their overall height, which is altered in the direction of movement of the ram (8) depending on the ambient temperature, can influence the position of the metal bellows (9).
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: October 6, 2015
    Assignee: MERTIK MAXITROL GMBH & CO. KG
    Inventors: Barbara Happe, Frank Pusch
  • Patent number: 8983283
    Abstract: A control system for an electric water heater having an upper heating element and a lower heating element is disclosed. The control system includes a control module that controls operation of the electric water heater by selectively toggling the upper and lower heating elements between an ON state and an OFF state and a consumer interface module that allows a consumer to input a set point temperature and select an energy savings mode for the electric water heater. The control module regularly monitors hot water usage and adjusts the set point temperature by a predetermined setback amount until a capacity of the water heater matches consumer usage.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: March 17, 2015
    Assignee: Emerson Electric Co.
    Inventors: Richard Miu, Lawrence J. Brazis, Richard E. Welch
  • Patent number: 6648234
    Abstract: A mixing valve has a housing and a stem axially displaceable to adjust the output temperature of the valve. A tubular core body fixed in the housing an axially displaceable coupling body having an inner end axially engageable with the stem and an outer end formed with a screwthread. Interengaging formations on the coupling body and the core body inhibit rotation of the coupling body in the core body while permitting axial displacement of the coupling body in the core body. A knob rotatable about the axis has a screwthread meshing with the screwthread of the coupling-body outer end. A retainer engaged between the knob and the core body inhibits axial displacement of the knob on the core body and permits rotation of the knob on the core body so that rotation of the knob on the core body axially shifts the coupling body in the core body.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: November 18, 2003
    Assignee: Friedrich Grohe AG & Co. KG
    Inventor: Christian Frankholz
  • Patent number: 6046666
    Abstract: A known thermal actuator includes a capsule, which contains a diaphragm controlling the position of a stem. A thermal expansion substance like wax is contained in the capsule which operates as a thermostat in a thermostatically controlled valve such as a thermostatically controlled mixing valve. The stem of the actuator is connected with a valve body movable between two valve seats for a hot and cold medium, respectively, and the capsule is placed in the area of the mixed medium for transmitting the heat of the mixed medium to the thermal expansion substance. In order to present a simple and more effective actuator that can react promptly at changes of temperature and which does not require an extra temperature sensor, the capsule includes an oblong cuplike sensor body, the surface of which is at least partly deformed in such a way that its thermal transmittance area is increased.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: April 4, 2000
    Assignees: Damixa A/S, Dauphinoise Thomson
    Inventors: Leif Ingvarsson, Patrick Andre
  • Patent number: 5979777
    Abstract: The invention is a sanitary mixer tap with a thermostatic device (1), especially for wall installation, with a thermostat cartridge (3) containing an overtravel unit (9). This unit (9) contains a sleeve (14), at least one pressure spring (15) and at least one pressure component (16) against which the pressure spring (15) acts. At each of its ends the sleeve (14) has a stop (19, 20). One stop (19) at least indirectly takes the thrust of the pressure component (16), the other stop (20) at least indirectly takes the thrust of the pressure spring (15). In order to achieve a simpler and cheaper construction design for the overtravel unit (9) without operational drawbacks, the sleeve (14) can be folded back on the overtravel unit (9) when it is not mounted and both stops (19, 20) will be presented before the pressure spring (15) and the pressure component (16) are inserted.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 9, 1999
    Assignee: Ideal-Standard GmbH
    Inventor: Josef Ems
  • Patent number: 5931375
    Abstract: Energy exchanger valve (8) with thermostat valve (12), a housing (9) with inlet (20) and outlet (21), a thermostat bellows displaceable spindle (30) with seal (42) which, by the expansion/contraction of the thermostat bellows and against the pressure of a surrounding spring (31) can close/open an opening (27) with a seating (27a) in a transverse wall (24) between the inlet (20) and the outlet (21), and a piston (13) controlled by differential pressure for the control of a medium's differential pressure across a pre-setting (11) and a thermostat valve (12) consisting of the seating (27a) and the seal (42) between the inlet (20) and the piston (13), the thermostat valve (12) being able to cut off the flow between the inlet and the outlet independently of the pre-setting (11). With the valve (8), only a predetermined maximum amount of the energy-carrying medium flows through the energy exchangers (5).
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: August 3, 1999
    Assignee: Frese Armatur A/S
    Inventors: Hans Henrik Gylov, Ole Joergensen, Carsten Moeller
  • Patent number: 5860591
    Abstract: Energy exchanger, valve (8) with thermostat valve (12), a housing (9) with inlet (15) and outlet (16), a thermostat bellows displaceable spindle (42) with a seal (32) which, against the pressure of a spring (43) surrounding the spindle (42), closes/opens an opening (28) in a transverse wall (29) in the housing (9) between the inlet (15) and the outlet (16), and a membrane (17, 21) controlled by the differential pressure for the control of an energy-carrying medium between the inlet (15) and the outlet (16), and an adjustable closing element (11) between the inlet (15) and the membrane (17, 21), the thermostat valve (12) being able to shut off the flow between the inlet (15) and the outlet (16) independently of the closing element (11). With the valve (8), only a predetermined maximum amount of the medium flows through the energy exchangers (5). If the differential pressure increases upon the closing of one or more valves on a pipe length, the flow in the individual energy exchanger (5) is not increased.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: January 19, 1999
    Assignee: Frese Armatur A/S
    Inventors: Hans Henrik Gylov, Ole Joergensen, Carsten Moeller
  • Patent number: 5413277
    Abstract: A thermostat system includes a liquid-filled activating device (1), and an operating device (3) which is connected to the activating device by a capillary line (4) and which is adapted to control a heat valve. The activating device (1) includes an annular base plate (10) having a rear surface which is adapted to be mounted against a supporting wall, and the base plate defines a central region which is bounded thereby. A fluid filled housing (8) is mounted to the base plate so as to extend outwardly from the central region and away from the supporting wall, and an axially extending tube (9) is mounted in the housing so as to be axially extended or contracted by the temperature and pressure of the fluid in the housing, and which in turn changes the fluid capacity of the housing and signals the operating device (3). A rotatable knob (5) acts to adjust the length of the tube and thus controls the operating temperature of the system.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: May 9, 1995
    Assignee: Alfred Buchta
    Inventor: Wolfgang Rothengass
  • Patent number: 5361981
    Abstract: An air conditioning unit for use with a central thermal unit supply system. The air conditioning unit includes a formed wall mounting member which is secured to a wall, and from which is supported a heat exchange unit consisting of a heat transfer fluid coil and an air moving assembly including a tangential blower.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: November 8, 1994
    Assignee: Heat Exchangers, Inc.
    Inventors: David J. Albert, John Spencer
  • Patent number: 5251811
    Abstract: A thermostatically regulated mixing valve having a housing extending along an axis and a stem in the housing axially displaceable to adjust the thermostatically regulated temperature of the valve has a control assembly with a nut threaded on the housing, axially linked to the valve stem, and rotatable about the axis in one direction to move axially inward and move the stem axially inward and rotatable in the opposite direction to move axially outward and move the stem axially outward. An abutment sleeve is fixed to the valve housing and a sleevelike knob engages over the nut and abutment sleeve and is formed with an inwardly projecting stop. Splines on the knob and on the nut rotationally couple same together but permit relative axial movement so that the knob rotates with the nut but does not move axially therewith.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: October 12, 1993
    Assignee: Friedrich Grohe Aktiengesellschaft
    Inventor: Christian Frankholz
  • Patent number: 5242108
    Abstract: A control assembly used on a thermostatically regulated mixing valve has a housing extending along an axis and a stem in the housing axially displaceable to adjust the thermostatically regulated temperature of the valve. The assembly has a nut threaded on the housing, axially linked to the valve stem, and rotatable about the axis in one direction to move axially inward and move the stem axially inward and rotatable in the opposite direction to move axially outward and move the stem axially outward. An abutment sleeve engageable over the valve housing is formed with a radially outwardly open passage and interengaging formations on the abutment sleeve and valve housing rotationally couple same together. The housing is formed in the sleeve with a radially outwardly open groove level with the passage and a clip engages through the passage with the groove and axially couples the sleeve to the valve housing.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: September 7, 1993
    Assignee: Friedrich Grohe Aktiengesellschaft
    Inventors: Bruno Heimann, Christian Frankholz
  • Patent number: 5230465
    Abstract: A thermostatically regulated mixing valve having a housing and a stem extending along an axis in the housing and axially displaceable to adjust the thermostatically regulated temperature of the valve has a control knob that has a nut threaded on the housing, axially linked to the valve stem, and rotatable about the axis in one direction to move axially inward and move the stem axially inward and in the opposite direction to move axially outward and move the stem axially outward. An inner knob part formed with an angularly extending and axially throughgoing slot is axially coupled to the housing and rotationally coupled to the nut so that the inner knob part rotates with the nut but does not move axially therewith.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: July 27, 1993
    Assignee: Friedrich Grohe Aktiengesellschaft
    Inventors: Jan R. Kostorz, Christian Frankholz
  • Patent number: 5205483
    Abstract: A self-regulating mixing valve has a main housing having hot- and cold-water inlets and provided with an externally threaded stem defining an axis, a valve body displaceable axially in the housing between hot and cold end positions blocking flow from the inlets and through intermediate positions permitting flow from both inlets, and a thermostat in the housing connected to the valve body. An abutment ring fixed on the housing around the stem is provided with a stop. An adjustment nut threaded on the stem adjacent the ring is axially operatively engaged with the thermostat so that rotation of the nut in one direction about the axis axially displaces the thermostat in one direction and opposite rotation axially oppositely displaces it. A protective sleeve centered on the axis and fixed on the ring extends axially outward from the ring coaxially around the sleeve and projects axially outward past the sleeve.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: April 27, 1993
    Assignee: Friedrich Grohe Aktiengesellschaft
    Inventor: Jan R. Kostorz
  • Patent number: 5143286
    Abstract: A thermostat top part is mounted to a valve housing for rotation relative thereto and is axially removably secured thereto. The thermostat top part has a retaining ring surrounding and rotatable relative to a hollow cylindrical base foot. A clamping element is mounted by the base foot for radial movement between a position abutting against a clamping face of the valve housing that is tapered axially toward the housing abutment face in a radial inward direction for retaining the top part on the valve housing and a radial outward position permitting the thermostat top part being axially removed from the valve housing. A torsion spring resiliently urges the retainer ring to rotate in a direction for moving the clamping element radially inwardly.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: September 1, 1992
    Assignee: Danfoss A/S
    Inventors: Henning B. Hansen, Stefan P. Maroti, Bjarne Frederiksen, Knud Lykkegaard
  • Patent number: 4760954
    Abstract: The invention relates to a heating system of the type in which a radiator in a room has the flow of a heated fluid thereto from a central source such as a boiler controlled by a thermostatic valve. The valve normally has a sensor associated therewith to which the valve reacts which senses room temperature. An electrical heating resistor is positioned in close proximity to the sensor. A solar cell positioned as in a window so as to be impinged upon by rays of the sun is electrically connected to the heating resistor and the resulting current developed by the solar cell is utilized to effect a heating of the resistor which is related to the intensity and angle of the sun's rays. The heat generated by the resistor supplements the sensed room temperature so that the valve is operated in a way which takes into account the radiant energy to which a room is subjected by the sun.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: August 2, 1988
    Assignee: Danfoss A/S
    Inventor: Allan H. Hansen
  • Patent number: 4739793
    Abstract: A thermostatically operated valve uses a valve insert screwed into a tube-shaped stud at a valve housing. The valve insert comprises two spaced-apart valve seats which are located on opposite walls of a chamber provided within the valve insert series-connected in a flow direction with one seat forming a control valve seat and the other seat forming a shut-off valve seat. Between the valve seats, a valve closing body is arranged within the chamber for temperature control operation by a thermostat device. The outlet of the valve is connected to a chamber downstream of the shut-off valve seat and a throttling bore connects the chamber between both valve seats with the outlet of the valve. A removal of the thermostat device allows the valve closing body to be urged against the shut-off valve seat by a spring within the valve insert while maintaining a flow through the throttling bore.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: April 26, 1988
    Assignee: Honeywell-Braukmann GmbH
    Inventor: Rudolph Vollmer
  • Patent number: 4681254
    Abstract: For use in a radiator space heating system, a thermostatic valve for controlling the flow of heating agent to the radiator is provided with a bypass and at least two auxiliary valves. One auxiliary valve is disposed in the bypass and controlled by the thermostat. The other auxiliary valve is timer-controlled and disposed in series with the thermostatic valve. When temperature reduction is desired, such as during nighttime operation, the timer-controlled auxiliary valve closes, but the bypass auxiliary valve can open when the set-back temperature is reached.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: July 21, 1987
    Assignee: Dieter Grasslin Feinwerktechnik
    Inventor: Gerd Kammerer
  • Patent number: 4558819
    Abstract: A tamper proof cartridge for use in nonelectric thermostatic valve sensors is disclosed. The usual cartridge includes a temperature sensor, operably connected to a push rod and an upper elongated stem by a spring. The upper stem terminates in an orifice sealer. The upper stem and sealer are of predetermined measurements to sealingly fit a valve orifice with a seat face. The improvement includes a lower extension of the upper stem extending below the orifice which terminates in an additional orifice sealer. The lower extension is of a predetermined length to insure that the additional orifice sealer permits flow of heat while the temperature sensor is operational and calls for the orifice to be open. The additional sealer is of sufficient width to seal the orifice. The disconnection of the sensor will cause the spring to urge the stem upward causing the additional orifice sealer to then sealingly fit the orifice, thereby restricting the heat from flowing through the valve.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: December 17, 1985
    Inventor: Robert McDonald
  • Patent number: 4508263
    Abstract: The invention relates to a thermostatic valve assembly of the type in which a working element containing a vapor-liquid filling is housed in the temperature setting control knob. The assembly includes a housing having a projecting portion. There is a threaded adjusting connection between the knob and a base unit which is attachable to the housing projection portion. The invention is directed to specific constructions for attaching the base unit to the projection portion.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: April 2, 1985
    Assignee: Danfoss A/S
    Inventors: Svend P. Pedersen, Soren N. Wrang, Jens J. Molbaek
  • Patent number: 4508262
    Abstract: The invention relates to a thermostatic valve assembly of the type in which the working element containing the vapor-liquid filling is housed in the temperature setting control knob. A threaded adjusting connection between the knob and an axially moveable unit which controls the compression of the setting spring provides rugged and simple construction.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: April 2, 1985
    Assignee: Danfoss A/S
    Inventors: Svend P. Pedersen, Jens J. Molbaek, Allan H. Hansen
  • Patent number: 4497438
    Abstract: A non-electrical thermo-mechanical control system for a hot water heating system having a modulating burner in the boiler. The thermo-mechanical control system simultaneously controls fuel and air supply to the burner in dependence on the temperature difference between forward water temperature to the radiators and return water temperature from the radiators.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: February 5, 1985
    Assignee: Honeywell Inc.
    Inventor: Ulrich Bonne
  • Patent number: 4443120
    Abstract: The invention relates to a remote control temperature sensor having a capsule containing an expansible material and a capillary tube which connects the capsule to a radiator valve or the like. The temperature sensor has a housing in which the capsule in rotatably mounted and the housing is a wall where the temperature is to be monitored. The capillary tube is wound around the capsule and is dispensible therefrom any desired distance less than the length of the tube to the radiator valve to which the sensor is to be connected.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: April 17, 1984
    Assignee: Danfoss A/S
    Inventors: Niels P. G. Graversen, Svend P. Pedersen
  • Patent number: 4412648
    Abstract: A control valve assembly for use in a one-pipe steam heating system in which the passage of steam to each radiator in the system and the return of condensate from each radiator is controlled by individual valve assemblies at each radiator, the valve assemblies being temperature responsive for the regulation of heat provided at each radiator location. Each valve assembly includes a temperature-responsive valve arrangement for controlling the admission of steam to the radiator through a supply pipe and a pressure-responsive valve arrangement for enabling the return of condensate through the same pipe, the entire assembly being compatible with existing fittings for the ready replacement of conventional radiator valves.
    Type: Grant
    Filed: April 1, 1982
    Date of Patent: November 1, 1983
    Assignees: Ammark Corporation, Hans Sasserath & Co. KG
    Inventors: Thomas H. Ford, Arend Sasserath
  • Patent number: 4294402
    Abstract: Control devices for heating installations are disclosed, which heating installations are provided with thermostat controls. The control devices sense the temperature of the heating medium, e.g., water, to be passed to the heating installation and to be returned therefrom. The temperature difference actuates a control for mixing or directing the flow of the medium in the desired volumes. Use is made of control pistons and expansion material to provide control devices which are particularly capable of optimum energy utilization.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: October 13, 1981
    Assignee: Honeywell Inc.
    Inventor: Rudolf Vollmer
  • Patent number: 4290553
    Abstract: The invention relates to a manually setable, knob-type thermostatic control assembly for radiator valves. The knob normally has a fixed or usual setting to provide a desired temperature for a room. Occasionally the setting is temporarily changed for one reason or another and the unit must be reset to its usual setting. This is facilitated herein and in the prior art by providing index markings on the relatively rotatable members. The novelty herein, however, is in providing a cap for the rotatable knob member which carries the index marking and the cap is readily adjustable relative to rotatable member in a simple manner without detaching the cap from the knob member.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: September 22, 1981
    Assignee: Danfoss A/S
    Inventors: Aage Molgaard, Niels P. G. Graversen
  • Patent number: 4232817
    Abstract: An adjustment control for a thermostatic valve consists of a non-rotatable component to the valve on which is mounted a rotatable knob for setting the temperature control, the knob having a maximum rotation of about one revolution. A releasable auxiliary device is provided which is operable between the component and the knob at a predetermined intermediate rotational position of the knob to limit the rotation of the latter.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: November 11, 1980
    Assignee: Braukmann Armaturen AG
    Inventors: Bernhard W. Braukmann, Rudolf Vollmer
  • Patent number: 4216902
    Abstract: A thermostatically controlled valve for heated fluid flowing through a conduit has a valve seat and cooperating valve mechanism to permit the flow of fluid through the seat; a housing, open at one end, is secured to the conduit at the other end over the valve mechanism. A sensor, secured in the open end of the housing, is responsive to change in ambient temperature of the air above the housing and the sensor operates a plunger which acts on the valve mechanism to regulate the flow through the said seat. Thermal shielding means are provided in the housing between the sensor and the valve mechanism to prevent heat from the latter affecting the sensor and vents are provided in the housing below the thermal shielding means to allow air heated by the valve mechanism to escape to atmosphere.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: August 12, 1980
    Assignee: Braukmann Armaturen AG
    Inventor: Heinz W. Braukmann
  • Patent number: 4214698
    Abstract: A heat control system for a discontinuously operated heat radiator of the co-tube type is disclosed. A thermostat located away from the radiator controls the opening and closing means of an inlet steam valve located between the steam feeder connection and the radiator. A condensed water outlet valve also located between the steam feeder connection and the radiator is normally biased closed by its own weight. When the inlet steam valve is open the steam pressure on each side of the outlet valve is equal and the outlet valve remains closed as the steam entering the radiator is condensed and backs up behind it. However, when the inlet steam valve is closed, the steam pressure in the radiator is eliminated so that the steam pressure in the steam feeder connection acts on the outlet valve to push it open and allow the condensed water to drain from the radiator into the steam feeder connection.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: July 29, 1980
    Assignee: Tour & Andersson Aktiebolag
    Inventor: Hans E. Josefsson
  • Patent number: 4191327
    Abstract: An auxiliary heating element acts on a steam trap connected to the return outlet of a radiator. A check valve placed between the trap and the radiator prevents dissipation of the steam generated by the auxiliary heating element into the radiator. A thermostat provides automatic control over the operation of the heating element and the radiator.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: March 4, 1980
    Inventors: Arthur H. Anderson, Thomas E. Murray
  • Patent number: 4176786
    Abstract: A thermostatic control valve for regulating the supply of fluid through a conduit includes in combination a valve plate and seat in the conduit, the valve plate having a valve stem extending outwards of the conduit with the valve stem having a spring exterior of the conduit to move the plate away from the seat 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 having means responsive to temperature change to move the plunger towards the seat. An interior member is threaded in the housing and removable means are used for attachment to the interior member to rotate it in the housing, thus providing adjustment. The control valve is secured to the conduit through a washer having a pawl which engages with ratchet shaped teeth of a ring secured in the control valve.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: December 4, 1979
    Assignee: Braukmann Armaturen AG
    Inventor: Heinz W. Braukmann
  • Patent number: 4171768
    Abstract: An individual thermostat unit for the valve housing of a central heating radiator replaces the conventional radiator valve mechanism and affords a simplified mounting without the need for modifications of pipe connections. This thermostat unit comprises two setting means, one for basic settings, and another for temperature settings. A setting knob gives different temperature settings by being turned on a thread. This same thread permits the setting knob to be screwed off as part of the housing of the unit, to make the basic setting means accessible when mounting the unit in a valve housing.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: October 23, 1979
    Inventor: Fingal Christiansson
  • Patent number: 4141497
    Abstract: The invention relates to a thermostatic valve regulating system having a central control unit for operating two or more remotely located valve operating units. The valve operating units are for heat transfer equipment such as radiators. The valve operating units have expansible chamber elements and associated valve operating rods. The central control unit has an adjustable temperature response expansible chamber element -TRECE) with a vapor-liquid filling. The central control unit also has a transmitting expansible chamber element (TECE) which is connected to all of the expansible chamber elements of the valve operating units with capillary tubing. The capillary tubing and the connected expansible chamber elements are filled with a liquid transmitting element. The temperature responsive TRECE is in series relation to TECE and expansion and recession thereof cause an opposite recession or expansion of TECE.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: February 27, 1979
    Assignee: Danfoss A/S
    Inventors: Knud V. Valbjorn, Niels P. G. Graversen
  • Patent number: 4129149
    Abstract: A control valve for a central heating system, the valve having an inlet, an outlet, a branch outlet, and a bypass conduit between the inlet and the outlet, the cross sectional flow area of the bypass conduit being independent of the position of either a main control valve member for controlling flow through the branch outlet or a settable valve member for limiting flow through the branch outlet.
    Type: Grant
    Filed: February 7, 1978
    Date of Patent: December 12, 1978
    Assignees: Aktiebolaget Fellingsbro Verkstader, Erik Sorberg Armaturfabrik Aktiebolag
    Inventors: Roland Brehmer, Bengt Sorberg
  • Patent number: 4114682
    Abstract: The invention relates to apparatus for heating and/or cooling a room which is large enough to require at least two heat exchanger units. Controls are provided which dependingly relate the outgoing air stream temperatures of the heat exchangers to avoid the causing of drafts in the room. One of the heat exchangers is a guide unit and all others are follower units. Each heat exchanger has its own individual control such as a valve for admitting heat exchange fluid to the unit. The guide unit has associated room temperature sensor and setting devices for controlling its individual control. Each follower unit has a pair of temperature sensors for jointly controlling its associated individual control. One sensor of each pair is in the outflowing air stream of the guide unit and the other sensor of the pair is in the outflowing air stream of the associated follower unit.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: September 19, 1978
    Assignee: Danfoss A/S
    Inventor: Vagn Valbjorn Knud
  • Patent number: 4089461
    Abstract: A thermostatic radiator valve has a spring loaded thermostat located in a rotatable member with the spring bearing against the thermostat and the rotatable member, the latter having arms surrounding the thermostat, the free end of each arm having a radially inwardly projecting extension which bears against the loading spring.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: May 16, 1978
    Assignee: Braukmann Armaturen A.G.
    Inventor: Eberhard Gocke
  • Patent number: 4039126
    Abstract: The invention relates to a thermostatic regulator assembly which has the dual function of controlling both the heating and air conditioning equipment of a building. The assembly basically incorporates a first valve unit for controlling the flow of a heating fluid such as steam or hot water and a second valve unit for controlling the flow of air which in turn can control the regulator of a damper system of ducts which supply cooled air for air conditioning. The first valve unit is operative when it is open and the second valve unit is operative when it is closed. Thermostatic motor means operate the first and second valve units sequentially so that they are sequentially effective for first and second temperature ranges which correspond to heating and cooling condition requirements. The second valve unit may have a valve seat in the form of a nozzle and a closure member in the form of a baffle plate.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: August 2, 1977
    Assignee: Danfoss A/S
    Inventors: Volker Spies, Christian Dyhr-Mikkelsen Poul, Knud Vagn Valbjorn
  • Patent number: 4016804
    Abstract: The invention relates to a thermostatic control unit for radiator valves, this unit being of the type which has an adjustable bellows. The bellows is adjusted only during initial calibration of the thermostatic control unit or when the temperature setting of the unit is changed. The control unit includes a screw and nut arrangement in which the nut is attached to the free or moving end of the adjustment bellows. About three turns between the screw and the nut have been found suitable to provide a sufficient movement of the nut to allow an adequate adjustment of the bellows. A problem with prior units of this type is that if the screw is turned inwardly more than three turns the thread may bottom and thereby cause an excessive and damaging torque to be transmitted to the bellows. Alternately, if the screw is turned outwardly to disengage from the nut, the nut becomes cocked in the enclosed casing and it becomes impossible for the screw to re-enter the nut.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: April 12, 1977
    Assignee: Danfoss A/S
    Inventor: Kvetoslav Turecek