Hot And Cold Water System Having A Connection From The Hot To The Cold Channel Patents (Class 137/337)
  • Patent number: 9657954
    Abstract: A thermally optimised circulation fluid system is proposed which comprises a circulation line, a circulation pump unit and a control unit. The circulation pump unit and the circulation line together form a circulation circuit. The circulation pump unit is configured for transferring an amount of thermal energy directly or indirectly to a fluid located in the circulation line. The control unit is configured for adjusting the amount of thermal energy which is transferrable to the fluid.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: May 23, 2017
    Assignee: AIRBUS OPERATIONS GMBH
    Inventors: Sebastian Flashaar, Axel Schreiner, Michael Rempe, Erika Lourdes Sander
  • Patent number: 9494174
    Abstract: A system includes an inlet pipe configured to convey a fluid and a buffer volume configured to buffer the fluid. The buffer volume includes a smallest diameter tube having a smallest diameter, a first inlet end, and a first outlet end. The first inlet end is configured to receive the fluid from the inlet pipe. The buffer volume also includes an intermediate tube surrounding the smallest diameter tube having a first capped end and a second outlet end. The first capped end is positioned next to the outlet end of the smallest diameter tube. The buffer volume also includes a largest diameter tube surrounding the intermediate tube second capped end and a third outlet end. The second capped end is positioned next to the second outlet end of the intermediate tube. The system also includes an outlet pipe configured to convey the fluid from the buffer volume.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 15, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Patrick Edward Pastecki, Balakrishnan Ponnuraj, James Arthur Simmons, Ravinder Yerram
  • Patent number: 9310813
    Abstract: A water heater appliance and a method for operating the same are provided. The method includes receiving a first temperature measurement from a temperature sensor of the water heater appliance, receiving a second temperature measurement from the temperature sensor of the water heater appliance, and establishing if water is flowing through a conduit of the water heater appliance based at least in part on the first and second temperature measurements.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: April 12, 2016
    Assignee: General Electric Company
    Inventors: Brett Alan Farris, Craig Iung-Pei Tsai, Eric Jeffrey Klingeman
  • Patent number: 9214078
    Abstract: An individual activity monitoring system comprises a microphone configured to receive sounds and convert them to audio signals, a memory configured to store recorded audio signal patterns of water flow events, and a microprocessor coupled to the microphone and configured to receive the audio signals, compare the audio signals to the recorded audio signal patterns, and recognize whether the audio signals represent a water flow event. The microprocessor is configured to reset a reset clock in response to a recognized water flow event, and being further configured to issue an alert notification in response to an absence of a subsequent water flow event after the reset clock exceeds a preprogrammed time period since a last recognized water flow event.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 15, 2015
    Inventor: David Seese
  • Patent number: 9170584
    Abstract: A valve assembly for a water circulation system includes a valve body defining a bypass passage between a hot water side and a cold water side of the valve body. The bypass passage has a valve seat therein. A bypass valve is received within the bypass passage. The bypass valve restricts the flow of water through the bypass passage based on a temperature of the water in the bypass passage. The bypass valve is variably positionable with respect to the valve seat to control a bypass shut-off temperature of the water.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: October 27, 2015
    Assignee: Grundfos Pumps Corporation
    Inventors: Ken Lum, Dale Kempf
  • Patent number: 9151021
    Abstract: The invention relates to a modular device formed by a single module (1) for installation between the hot water pipe (H) and cold water pipe (C) and a faucet (4), consisting of: two feed line sections for hot water (2) and cold water (3); a recirculation pump (5) in a bypass conduit (12) that connects the inlet conduits (2) and (3); a pressure switch (6) in feed section (2); a flow meter (7) arranged in feed section (2); a thermal switch (8) in section (2); a check valve (9) at the intersection of the bypass conduit (12) and section (3); and water flow regulating means (10, 11) located between the bypass conduit (12) and the hot water feed section (2).
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: October 6, 2015
    Inventor: Alfonso Cuervo-Arango Y De Cachavera
  • Patent number: 9028989
    Abstract: A fuel cell system includes a water vapor transfer unit and a fluid flow distribution feature, the water vapor transfer unit including a first plate having a plurality of first flow channels for receiving a flow of a first fluid therein, and a second plate having a plurality of second flow channels for receiving a flow of a second fluid therein. The fluid flow distribution feature is configured to control at least one of a volume of flow of the first fluid through the first flow channels and a volume of flow of the second fluid through the second flow channels, wherein at least one of a flow distribution of the first fluid across the first plate and a flow distribution of the second fluid across the second plate is varied.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: May 12, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Yan Zhang, Steven R. Falta, Steven D. Burch, Glenn W. Skala
  • Patent number: 8876012
    Abstract: A water saver system that includes a temperature and touch sensitive valve, connected between the shower water control valves and the shower head, that diverts water to an accumulator tank until the water warms up. The temperature sensitive valve opens when the water reaches a preset temperature. The water stored in the accumulator tank flows back through a metering orifice and mixes with the warm water over the course of the shower so little water is wasted. The accumulator tank could be placed on the floor of the shower or outside the tub (under sink) in a retrofit or built into the wall stud cavity in new construction.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: November 4, 2014
    Inventor: John L. McMurtry
  • Publication number: 20140261763
    Abstract: A hardware system that performs new energy- and water-saving, restorative tasks upon use is provided. In some aspects of the invention, energy-saving hot water recapturing techniques are provided. In a preferred embodiment, the system may push hot water back to a water tank, and halt such pushing after capturing all such hot water. In other aspects, specialized energy-saving pipes further assist the system, and a user's behavior may also assist the system in implementing additional energy and water-saving options and settings, including, but not limited to, a “Final Rinse” option and the timing of ending water service. In still other aspects, a user's ending use of water service a plumbing may also trigger an ending spray of handled parts of those fixtures and, optionally, a soap or antiseptic spray or other secretion. The same technology may be applied to other handles and fixtures, like door handles or elevator buttons.
    Type: Application
    Filed: March 18, 2013
    Publication date: September 18, 2014
    Inventor: Christopher V. Beckman
  • Publication number: 20140182521
    Abstract: A fluid heating system, comprising: a heater having an inlet and an outlet; a storage vessel; a fluid mixer having a first inlet for receiving fluid stored in or passing through the storage vessel, a second inlet for receiving fluid from a cold fluid supply, and an outlet for supplying fluid to the heater inlet; wherein in a first mode the heater is operable to heat fluid in the storage vessel, and in a second mode the fluid mixer is mixes fluid from or passing through the storage vessel with fluid from the cold fluid supply at a predefined volumetric ratio to provide mixed fluid to the inlet of the heater to be heated further to an output temperature.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Applicant: Zenex Technologies Limited
    Inventor: Christopher C. Farrell
  • Patent number: 8740098
    Abstract: The initially cold water streams of a household hot water plumbing circuit are accumulated in a storage container to be thereafter drained off with the cold water stream, at various flow restricted levels, thereby conserving water use. This accumulate may be adjustably admixed into the waste products of a household drinking water purification system, thereby diluting it to acceptable levels that may be useful for washing and the like. Additionally, and/or alternatively, the fresh water stream may be admixed into the water purification waste water stream. Each of these water conserving functions is conformed to be combined in a stepwise manner, thereby accommodating budgetary and use growth constraints.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: June 3, 2014
    Assignee: Nitroworks Corporation
    Inventors: Steven M. Greenthal, Neal W. Smith
  • Patent number: 8672233
    Abstract: A water saving device includes a housing having a hot water inlet chamber connectable to a hot water supply, a temperature sensing chamber having a cold water outlet connectable to a water storage system, and a hot water outlet chamber having a hot water outlet. The inlet and outlet chambers are interconnected by a first port. The inlet and temperature sensing chambers are interconnected by a second port. The temperature sensing and hot water outlet chambers are interconnected by a third port. The device includes a water-pressure actuated piston that is displaceable upon a drop in water pressure in the hot water outlet chamber. The temperature sensing chamber has a temperature-sensitive valve assembly that closes the third port when the temperature of water is below a predetermined level and opens the third port and closes the cold water outlet when the temperature of water is above a predetermined temperature.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: March 18, 2014
    Inventor: Derick Sinclair
  • Publication number: 20140060660
    Abstract: A water circulating system is for distributing instant hot water at a fixture that has respective hot and cold water inlets. The system includes hot and cold water piping, a pump constructed and arranged to pump water through said hot water piping. A by-pass device is provided at the sink area and connected directly between the hot water inlet and the cold water inlet. The by-pass device includes a pump for drawing hot water, a thermal switch, and a check valve. The pump, thermal switch, and check valve are constructed and arranged in series. A controller is connected to the pump so as to control the duty cycle of the pump so as to establish at least one of a selectable pump cycle time, and a selectable pump running time.
    Type: Application
    Filed: October 7, 2013
    Publication date: March 6, 2014
    Applicant: AQUAMOTION, INC.
    Inventors: Benno Lebkuchner, Hans L. Kuster
  • Publication number: 20130299010
    Abstract: A water control fixture includes a fixture body in fluid communication with a pressurized supply of hot water and a pressurized supply of cold water. The fixture body interconnects the supply of hot water and the supply of cold water. The fixture body has a spout outlet configured to dispense water from the fixture body. At least one operating valve is coupled to the fixture body for controlling a flow of water to the spout outlet. A bypass valve is disposed in the fixture body for controlling a recirculating flow of water through the fixture body. The bypass valve blocks and permits recirculating flow from the supply of hot water to the supply of cold water based on a temperature of the water.
    Type: Application
    Filed: July 17, 2013
    Publication date: November 14, 2013
    Applicant: Grundfos Pumps Manufacturing Corporation
    Inventors: Ken Lum, Dale Kempf
  • Publication number: 20130279891
    Abstract: A water delivery system is provided, comprising at least one faucet device with a cold water faucet part and a hot water faucet part, a cold water line to the at least one faucet device, a tankless heater device for heating water, a hot water line having a first portion running from an outlet of the tankless heater device to the at least one faucet device and having a second portion running from the at least one faucet device to an inlet of the tankless heater device, and a circulatory pump arranged in the second portion of the hot water line, wherein the circulatory pump has a prefixed first performance level and a prefixed second performance level, wherein the first performance level causes a finite water flow in the hot water line which is below an operation threshold value of the tankless heater device.
    Type: Application
    Filed: April 20, 2012
    Publication date: October 24, 2013
    Applicant: Xylem IP Holdings LLC
    Inventor: Oliver Laing
  • Publication number: 20130240053
    Abstract: A valve assembly for a water circulation system includes a valve body defining a bypass passage between a hot water side and a cold water side of the valve body. The bypass passage has a valve seat therein. A bypass valve is received within the bypass passage. The bypass valve restricts the flow of water through the bypass passage based on a temperature of the water in the bypass passage. The bypass valve is variably positionable with respect to the valve seat to control a bypass shut-off temperature of the water.
    Type: Application
    Filed: May 2, 2013
    Publication date: September 19, 2013
    Applicant: Grundfos Pumps Corporation
    Inventors: Ken Lum, Dale Kempf
  • Patent number: 8534310
    Abstract: A two-way check/bypass valve is connected between the hot and cold water supply lines at hot and cold water faucets located most distantly from the water heater in a building. The valve establishes and maintains convective hot water circulation at a low flow rate from the heater to the most distant hot water faucet, through the cold water supply line, and back to the heater, during the period of time when the hot and cold water faucets are closed. When the hot water faucet is opened, hot water is nearly instantly available. Convective hot water circulation is stopped by the valve when either the hot or cold faucet is opened. The valve also prevents mixing of hot and cold water when either the hot or cold faucet is open and includes provision for dampening any water hammer effect.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: September 17, 2013
    Inventor: Raymond G. Ziehm
  • Publication number: 20130228233
    Abstract: The concepts relate to reducing energy loss associated with hot water systems. One example is manifest as a selective hot water isolation device that is configured to be connected in fluid flowing relation with a first water line and a second water line and where the selective hot water isolation device is configured to control water cross-over from the second water line into the first water line based upon water flow through the first water line.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 5, 2013
    Inventor: Spencer Kim Haws
  • Patent number: 8522814
    Abstract: A water control valve assembly includes a valve manifold having a mixing chamber for mixing water from a supply of hot water and a supply of cold water. The valve manifold has a water control element controlling the flow of water from the mixing chamber to a discharge port of the valve manifold. A thermostatically controlled bypass valve is in fluid communication with the valve manifold, wherein the bypass valve is configured to bypass water from the supply of hot water to the supply of cold water.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: September 3, 2013
    Assignee: Grundfos Pumps Corporation
    Inventors: Dale Kempf, Ken Lum
  • Patent number: 8517056
    Abstract: A fluid regulator (1) for use as a shower water saving device, wherein an initial volume of water of a water stream at an undesired cold temperature is collected in a chamber and is reintroduced into the water stream when the stream has reached the desired temperature. Reintroduction of the initial volume of cold water is at a controlled rate such that the temperature change upon reintroduction is not significant. The fluid regulator (1) comprises a body (2), a flow passage (3) having an inlet (20) and outlet (21) for the water stream, a water collection chamber (4) in fluid communication with the flow passage (3), and a flow diverter (5) associated with the flow passage (3) and moveable between a closed position in which the water stream is directed to the collection chamber (4), and an open position in which the water stream may flow to the outlet (21) and the water in the collection chamber (4) may be drained from the collection chamber (4) to the outlet (21) by way of the flow passage (3).
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: August 27, 2013
    Assignee: Cullin Innovation Pty Ltd
    Inventor: Peter Cullin
  • Patent number: 8505498
    Abstract: A commercial hot water system includes a boiler, a storage tank, and a hot water delivery line connected between the storage tank and at least one plumbing fixture along with a cold water delivery line connection between said plumbing fixture, a cold water source and said boiler. A pump, interconnected between the hot and cold water delivery lines, enables circulation of water to the fixtures. A timer and controller provides for turning on the pump and a temperature sensor, connected to the controller, is effective in stopping the pump to prevent heated water from being circulated through the cold water line.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: August 13, 2013
    Assignee: Advanced Conservation Technology Distribution, Inc.
    Inventor: Larry K. Acker
  • Patent number: 8505830
    Abstract: A water control fixture includes a fixture body in fluid communication with a pressurized supply of hot water and a pressurized supply of cold water. The fixture body interconnects the supply of hot water and the supply of cold water. The fixture body has a spout outlet configured to dispense water from the fixture body. At least one operating valve is coupled to the fixture body for controlling a flow of water to the spout outlet. A bypass valve is disposed in the fixture body for controlling a recirculating flow of water through the fixture body. The bypass valve blocks and permits recirculating flow from the supply of hot water to the supply of cold water based on a temperature of the water.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: August 13, 2013
    Assignee: Grundfos Pumps Manufacturing Corporation
    Inventors: Dale Kempf, Ken Lum
  • Patent number: 8439481
    Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel; and a liquid dispensing channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening. The outlet opening includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is sloped relative to the surface of the wall of the liquid dispensing channel. A liquid supply provides liquid that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member selectively diverts a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: May 14, 2013
    Assignee: Eastman Kodak Company
    Inventors: Yonglin Xie, Joseph Jech, Jr., Carolyn R. Ellinger, Maria J. Lehmann, Ali G. Lopez, Qing Yang
  • Patent number: 8434510
    Abstract: A valve assembly for a water circulation system includes a valve body defining a bypass passage between a hot water side and a cold water side of the valve body. The bypass passage has a valve seat therein. A bypass valve is received within the bypass passage. The bypass valve restricts the flow of water through the bypass passage based on a temperature of the water in the bypass passage. The bypass valve is variably positionable with respect to the valve seat to control a bypass shut-off temperature of the water.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: May 7, 2013
    Assignee: Grundfos Pumps Corporation
    Inventors: Ken Lum, Dale Kempf
  • Publication number: 20120325337
    Abstract: A representatively pumpless water heater system has an instantaneous water heater coupled in series with a storage water heater by piping circuitry incorporating a fixed (and selectively fixed) bypass useable to route pressurized incoming cold water sequentially through the instantaneous and storage type heaters. The fixed bypass can also route pressurized incoming cold water to mix with the heated water exiting the instantaneous heater for delivery to the storage heater.
    Type: Application
    Filed: May 20, 2012
    Publication date: December 27, 2012
    Inventors: Daichi L. Nakagawa, Kevin J. Pirotin
  • Patent number: 8327873
    Abstract: Temperature control valve apparatus for preventing back flow from a cold water line into a hot water line includes a housing having an inlet or connection to a hot water line, an outlet for a connection to a cold water line and an interconnecting bore with a valve seat. A removable valve plug is disposed in the bore proximate the valve seat and a valve spring biases the valve plug in a spaced apart relationship with the valve seat for enabling water to flow therepast and through the housing from the hot water line to the cold water line. A thermal actuator disposed in an operative position for moving the valve plug to a seating position against the valve plug is provided to prevent water flow therepast from the cold water line to the hot water line.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: December 11, 2012
    Assignee: ACT, Inc.
    Inventor: Larry K. Acker
  • Publication number: 20120305105
    Abstract: A hot-water supply heat exchanger having a mixing valve and a mixing valve integrated adopter are provided to facilitate control of hot water temperature with a simplified pipe structure. A hot-water supply heat exchanger comprises a heat exchange part (100), a heating water inlet (212), a heating water outlet (214), a cold water inlet (222), a hot water outlet (224), and a mixing valve (230). The heat exchange part allows heat exchange between hot water provided from a main heat exchanger (20) with cold water. The heating water inlet draws hot water into the heat exchanger. The to heating water outlet discharges the hot water heat-exchanged by the heat exchanger. The cold water inlet draws the cold water into the heat exchange part. The hot water outlet discharges the cold water that is heat-exchanged with heating water in the heat exchange part. The mixing valve mixes the hot water discharged through the hot water outlet with cold water provided from the cold water inlet.
    Type: Application
    Filed: September 8, 2010
    Publication date: December 6, 2012
    Applicant: Kyungdong Navien Co., Ltd
    Inventor: Tae-Sik Min
  • Patent number: 8291930
    Abstract: A hot water system includes cold water pipes, hot water pipes, a water heater, a pump, a pump control unit and a connection valve unit. The pump is used to increase the pressure of the hot water pipes to a preset higher level than the pressure in the cold water pipes. When hot water is needed, the connection valve unit at the user side is opened to connect the cold water pipes and the hot water pipes, and when the cold water pipes and the hot water pipes are connected, the water pressure difference between them will become smaller. When the pressure difference change is detected, the pump control unit will activate the pump to pump the water in the hot water pipes into the cold water pipes, so the water in the pipes starts to circulate, and the water will flow through the water heater and will be heated. When the heated hot water reaches the user, the pump is stopped. After the hot water is being served or when the water temperature drops down, the pump is again put into normal operation.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: October 23, 2012
    Inventor: Yu-Tuan Lee
  • Patent number: 8272395
    Abstract: A water dispensing device capable of recycling cold water comprises a mixing valve connected with a first pipe for supplying cold water and a second pipe for supplying hot water; at least one watering member connected with an output end of the mixing valve; a bucket connected with the output end of the mixing valve and the first pipe to store water from the mixing valve; a control unit being used to sense a temperature of the water flow passing through the mixing valve; as a sensed temperature is less than a set value, the cold water stored in a pipe system will be guided to recycle toward the bucket and to be supplied to the first pipe, obtaining recycling and reusing purpose; while the sensed temperature is more than the set value, the cold water stored in the pipe system will be guided to flow toward the watering members.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: September 25, 2012
    Assignee: Globe Union Industrial Corp.
    Inventor: Tsung-Yi Lo
  • Publication number: 20120222757
    Abstract: A water control fixture includes a fixture body in fluid communication with a pressurized supply of hot water and a pressurized supply of cold water. The fixture body interconnects the supply of hot water and the supply of cold water. The fixture body has a spout outlet configured to dispense water from the fixture body. At least one operating valve is coupled to the fixture body for controlling a flow of water to the spout outlet. A bypass valve is disposed in the fixture body for controlling a recirculating flow of water through the fixture body. The bypass valve blocks and permits recirculating flow from the supply of hot water to the supply of cold water based on a temperature of the water.
    Type: Application
    Filed: December 7, 2011
    Publication date: September 6, 2012
    Applicant: GRUNDFOS PUMPS MANUFACTURING CORPORATION
    Inventors: DALE KEMPF, KEN LUM
  • Patent number: 8245946
    Abstract: A unitary valve block assembly is interposed between a hot and cold water outlet and a faucet assembly including a hot and cold valve to convey the initially cold portion from the hot water outlet into an accumulator during all the times when the accumulator is substantially unfilled. This accumulated water is then emitted through the cold water valve each time cold water is demanded. When the pressure ratio between the accumulator and the water source indicates that it contains substantial quantities of un-evacuated stored water the subsequent demands of hot water are conveyed directly to the hot water valve regardless of the temperature thereof.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: August 21, 2012
    Assignee: Nitroworks Corporation
    Inventors: Steven M. Greenthal, Neal W. Smith
  • Patent number: 8231064
    Abstract: A water control fixture includes a housing having a plurality of ports defining a hot water inlet port, a cold water port, a fixture outlet port, and an auxiliary port, wherein water is dispensed from the housing via the fixture outlet port. A flow control unit is configured to be selectively positioned in fluid communication with different combinations of the plurality of ports, wherein the flow control unit has a main passage in fluid communication with the hot water inlet port, the cold water port, and the fixture outlet port. The flow control unit controls the flow of water from the hot water inlet port and the cold water port to the fixture outlet port. The flow control unit has an auxiliary passage in fluid communication with the auxiliary port and at least one of the hot water inlet port, the cold water port, and the fixture outlet port to perform an auxiliary function.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: July 31, 2012
    Assignee: Grundfos Pumps Corporation
    Inventors: Ken Lum, Dale Kempf
  • Patent number: 8176937
    Abstract: A temperature adjustable water mixing valve having a cold water inlet, a cold water outlet, a hot water inlet, a mixing water outlet, and a valve core configured to open or close water channels. The temperature adjustable water mixing valve further includes a pressure relief channel between the cold water inlet and a port connected with a water storage device. The channel is equipped with a check valve allowing water to flow from the water storage device to the cold water inlet. The temperature adjustable water mixing valve opens the check valve to discharge toward the front-end water source when the inner pressure in the water storage device is high.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: May 15, 2012
    Assignee: AOS Holding Company
    Inventors: Liping Zhang, Huaxin Wan, Bu Qiu, Lan Zhang
  • Patent number: 8091793
    Abstract: A faucet has a fixture body in fluid communication with a pressurized supply of hot water. The fixture body has a spout outlet configured to dispense water from the fixture body. At least one operating valve is coupled to the fixture body for controlling a flow of water to the spout outlet. A bypass valve is disposed in the fixture body for controlling a recirculating flow of water through the fixture body, where the bypass valve changes state when heated and when cooled to block and permit the recirculating flow of water based on a temperature of the water.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: January 10, 2012
    Assignee: Grundfos Pumps Manufacturing Corporation
    Inventors: Dale Kempf, Ken Lum
  • Patent number: 8066196
    Abstract: A water saver system that includes a temperature-sensitive valve, connected between the shower water control valves and the shower head, diverts water to a bladder pressure tank until the water warms up. The temperature sensitive valve opens when the water reaches a preset temperature. The water stored in the pressure tank flows back through a metering orifice and mixes with the warm water over the course of the shower so little water is wasted. The pressure tank could be placed on the floor of the shower or outside the tub (under sink) in a retrofit or built into the wall stud cavity in new construction.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: November 29, 2011
    Inventor: John Lance McMurtry
  • Patent number: 8043556
    Abstract: An ablutionary installation including a mixing valve having respective inlets for hot and cold water and an outlet for temperature controlled water, a temperature sensor for monitoring outlet water temperature and providing a signal representative of the outlet water temperature to an electronic controller, a user interface permitting selection of outlet water temperature up to a pre-determined temperature, the electronic controller being operable to compare the selected and sensed outlet water temperatures for controlling the mixing valve to adjust the ratio of hot and cold water delivered to the outlet according to the selected outlet water temperature, and apparatus for initiating a disinfection cycle to deliver water to the outlet at a temperature higher than the pre-determined temperature, wherein the initiating apparatus includes an operating sequence with at least two inputs.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: October 25, 2011
    Assignee: Kohler Mira Limited
    Inventors: Kevin Peel, Timothy James Shepherd, Geoffrey Hawke Whale, Paul Vigars, Nicholas John Beck
  • Patent number: 7971601
    Abstract: A valve assembly for a water circulation system includes a valve body defining a bypass passage between a hot water side and a cold water side of the valve body. The bypass passage has a valve seat therein. A bypass valve is received within the bypass passage. The bypass valve restricts the flow of water through the bypass passage based on a temperature of the water in the bypass passage. The bypass valve is variably positionable with respect to the valve seat to control a bypass shut-off temperature of the water.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: July 5, 2011
    Assignee: Grundfos Pumps Corporation
    Inventors: Ken Lum, Dale Kempf
  • Patent number: 7934663
    Abstract: A valve assembly (18) including: a housing (41) having a water supply inlet (48), a hot water outlet (49), a cold water outlet (50), a hot water flow passage (64) between said water supply inlet and said hot water outlet and a cold water flow passage (65) between said water supply inlet and said cold water outlet; hot water valve means (51) in said housing adapted to open said hot water flow passage (64) in response to entry of water above a predetermined temperature into said housing through said water supply inlet and to close said hot water flow passage in response to entry of water below said predetermined temperature into said housing through said water supply inlet; first cold water valve means (51) adapted to open said cold water flow passage (65) at a first position in response to entry of water below said predetermined temperature into said housing through said water supply inlet and to close said cold water flow passage at said first position in response to entry of water above said predetermined te
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: May 3, 2011
    Assignee: Innovative Environmental Solutions Pty Ltd.
    Inventors: Andrew Donald Willsford, Christopher James Murray
  • Patent number: 7832421
    Abstract: A method, system and device for making hot water available in a water-supply system is disclosed. The water-supply system includes a source of hot water, a hot-water line and one or more tap connections for hot water connected to the hot-water line. The method includes transporting water from the source of hot water through the hot-water line during at least a portion of periods of non-withdrawal through the one or more tap connections such that a temperature profile of water in the hot water line is at least one of substantially temporally constant and varying spatially monotonically along the hot-water line.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: November 16, 2010
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Oliver Laing
  • Patent number: 7779857
    Abstract: A hot water system includes a hot water source; a hot water delivery line connected between the hot water source and at least one plumbing fixture along with a cold water delivery line connection between said plumbing fixture, a cold water source and said hot water source; a pump, interconnected between the hot and cold water delivery lines, enables circulation of water from the hot water delivery line through the cold water delivery line and into the hot water source, thus eliminating the need for a separate recirculation line. A thermostatic valve is disposed in a serial arrangement with the pump between the hot and cold water lines for blocking flow of water from the hot water line into the cold water line when the pump is not operating.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: August 24, 2010
    Assignee: ACT, Inc.
    Inventor: Larry K. Acker
  • Patent number: 7744007
    Abstract: Thermostatic mixing valves and systems for mixing fluids of dissimilar temperature are disclosed. A thermostatic mixing valve in accordance with an illustrative embodiment of the present invention can include an elongated valve body defining a cold fluid inlet, a hot fluid inlet, a mix fluid outlet and a mixing chamber, a fluid flow regulator for adjusting the flow of cold and hot fluid injected into the mixing chamber, and temperature selection means for adjusting the temperature of fluid contained within the mixing chamber. The valve body may have a vertical, in-line configuration wherein the hot fluid inlet, mixing chamber, and mix fluid outlet are substantially axially aligned along a vertical longitudinal axis of the valve body, allowing hot fluid to pass substantially vertically through the valve body towards the mix fluid outlet.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: June 29, 2010
    Assignee: Honeywell International Inc.
    Inventors: Joseph W. Beagen, Steve Goins
  • Patent number: 7731097
    Abstract: A water saving device for us in a hot water system to recover an initial volume of cold water when a hot water tap is turned on. The device has an inlet for receiving water piped from a water heater, a primary outlet for delivering hot water to a tap, and a by-pass outlet through which any cooled water is diverted by a thermally actuated shuttle valve. The device also includes a secondary valve for closing off the by-pass outlet when the water pressure downstream of the primary outlet is high (such as when the down stream hot water delivery tap is closed and opening the by pass outlet when the water pressure downstream of the primary outlet is low, such as when the downstream hot water delivery tap is opened.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: June 8, 2010
    Assignee: Water Miser (Aust) Pty Ltd
    Inventors: Lindy Honeychurch, Ashley Thompson
  • Patent number: 7726332
    Abstract: A durable water heating system providing rapid hot water delivery includes a water heating unit connected to a water source. A hot water line connects the water heating unit to at least one water delivery fixture. A return line of substantially the first cross-section connects to the hot water line adjacent the water delivery fixture located at a greatest distance from the water heating unit. A flow velocity reduction device has a first end, a second end, a first cross-section, an aperture and that extends from the first end to the second end. The aperture and has a second cross-section smaller than the first cross-section. Attachment fittings are provided adjacent the first and second ends. When the device is installed in the return line, velocity of water circulating through the system will be substantially reduced, thereby reducing wear on the system while providing rapid hot water delivery at the fixture.
    Type: Grant
    Filed: December 16, 2006
    Date of Patent: June 1, 2010
    Inventor: Steve Fiske
  • Publication number: 20100096018
    Abstract: An instant hot water delivery system for efficiently heating water when necessary to provide instant hot water to a faucet. The instant hot water delivery system generally includes a water heater including an inlet and an outlet, a cold water supply line introducing cold water into the inlet, a hot water supply line connecting the outlet to a faucet and a recirculation line connected to the hot water supply downstream of the outlet and the cold water supply line upstream of the inlet. The recirculation line forms a first recirculation loop for water within the water heater to flow during a first water heating process. A recirculation pump is connected to the cold water supply line between the recirculation line and the inlet for circulating the water during the water heating process. In one embodiment, the control unit is used to retrofit an existing gas or electric water heater.
    Type: Application
    Filed: December 24, 2009
    Publication date: April 22, 2010
    Inventors: Jacob E. Wylie, Ronald T. Lane
  • Publication number: 20100096025
    Abstract: A faucet has a fixture body in fluid communication with a pressurized supply of hot water. The fixture body has a spout outlet configured to dispense water from the fixture body. At least one operating valve is coupled to the fixture body for controlling a flow of water to the spout outlet. A bypass valve is disposed in the fixture body for controlling a recirculating flow of water through the fixture body, where the bypass valve changes state when heated and when cooled to block and permit the recirculating flow of water based on a temperature of the water.
    Type: Application
    Filed: December 21, 2009
    Publication date: April 22, 2010
    Applicant: GRUNDFOS PUMP MANUFACTURING CORP.
    Inventors: DALE KEMPF, KEN LUM
  • Publication number: 20100071367
    Abstract: A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer.
    Type: Application
    Filed: December 4, 2009
    Publication date: March 25, 2010
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventor: Danny E. Gelbar
  • Publication number: 20090293961
    Abstract: A water saver system that includes a temperature-sensitive valve, connected between the shower water control valves and the shower head, diverts water to a bladder pressure tank until the water warms up. The temperature sensitive valve opens when the water reaches a preset temperature. The water stored in the pressure tank flows back through a metering orifice and mixes with the warm water over the course of the shower so little water is wasted. The pressure tank could be placed on the floor of the shower or outside the tub (under sink) in a retrofit or built into the wall stud cavity in new construction.
    Type: Application
    Filed: February 20, 2009
    Publication date: December 3, 2009
    Inventor: John Lance MCMURTRY
  • Publication number: 20090288715
    Abstract: Improvements in a hot water circulator are disclosed. The hot water circulator is placed in proximity to one or more water faucets or tubs. The construction of the hot water circulator creates a venture in the cold water line. When a user turns on the cold water the flow of cold water through the cold water line draws a portion of water from the water heater through the hot water line and into the cold water line. Because only a small portion of water is being drawn into the cold water line the temperature difference is negligible, but the hot water is brought to close proximity to the hot water valve where it is more quickly available. There is a reduced amount of water being wasted to bring hot water to the hot water valve. Hot water is delivered in seconds rather than minutes.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 26, 2009
    Inventor: Gregory Michael Granger, SR.
  • Publication number: 20090266426
    Abstract: A hot water system includes cold water pipes, hot water pipes, a water heater, a pump, a pump control unit and a connection valve unit. The pump is used to increase the pressure of the hot water pipes to a preset higher level than the pressure in the cold water pipes. When hot water is needed, the connection valve unit at the user side is opened to connect the cold water pipes and the hot water pipes, and when the cold water pipes and the hot water pipes are connected, the water pressure difference between them will become smaller. When the pressure difference change is detected, the pump control unit will activate the pump to pump the water in the hot water pipes into the cold water pipes, so the water in the pipes starts to circulate, and the water will flow through the water heater and will be heated. When the heated hot water reaches the user, the pump is stopped. After the hot water is being served or when the water temperature drops down, the pump is again put into normal operation.
    Type: Application
    Filed: April 15, 2009
    Publication date: October 29, 2009
    Inventor: Yu-Tuan LEE
  • Publication number: 20090230200
    Abstract: A water control valve assembly includes a valve manifold having a mixing chamber for mixing water from a supply of hot water and a supply of cold water. The valve manifold has a water control element controlling the flow of water from the mixing chamber to a discharge port of the valve manifold. A thermostatically controlled bypass valve is in fluid communication with the valve manifold, wherein the bypass valve is configured to bypass water from the supply of hot water to the supply of cold water.
    Type: Application
    Filed: April 20, 2009
    Publication date: September 17, 2009
    Inventors: Dale Kempf, Ken Lum