Class / Patent application number | Description | Number of patent applications / Date published |
137337000 | Hot and cold water system having a connection from the hot to the cold channel | 15 |
20080223451 | Hot water system - 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. | 09-18-2008 |
20080230126 | STRUCTURED HOT WATER DEMAND FLOW CONTROL SYSTEM WITH EXPANSION TANK - In a hot water system for providing intermittent hot water, a separate holding vessel is provided and disposed in a hot water line between a hot water source and a plumbing fixture for blending of incoming hot water with residual water in the vessel in order to decrease cold water surges at the plumbing fixture upon repeated use of hot water in the plumbing fixture. A bladder disposed within the separate holding vessel accommodates for thermal expansion of the water and positioning of vessel inlets and outlets prevents stagnation of water in the vessel. | 09-25-2008 |
20090266426 | HOT WATER SYSTEM - 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. | 10-29-2009 |
20090288715 | HOT WATER RECIRCULATOR USING PIPING VENTURI - 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. | 11-26-2009 |
20090293961 | Water Saver System - 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. | 12-03-2009 |
20100096025 | WATER CONTROL FIXTURE HAVING BYPASS VALVE - 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. | 04-22-2010 |
20120222757 | WATER CONTROL FIXTURE HAVING BYPASS VALVE - 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. | 09-06-2012 |
20120305105 | HOT-WATER SUPPLY HEAT EXCHANGER PROVIDED WITH A MIXING VALVE, AND ADAPTOR HAVING A BUILT-IN MIXING VALVE - 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 ( | 12-06-2012 |
20120325337 | FIXED AND SELECTIVELY FIXED BYPASS PUMPLESS INSTANTANEOUS / STORAGE WATER HEATER SYSTEM - 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. | 12-27-2012 |
20130228233 | Hot Water Recovery - 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. | 09-05-2013 |
20130299010 | WATER CONTROL FIXTURE HAVING BYPASS VALVE - 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. | 11-14-2013 |
20140261763 | Water and heat waste reduction techniques - 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. | 09-18-2014 |
20150377497 | HOT WATER ENERGY CONSERVATION - The concepts relate to reducing energy loss associated with hot water systems. One example can monitor hot water use in a system. Upon completion of the hot water use, the example can recover some of the hot water from hot water lines into a water heater that heated the hot water. The method can also deliver the recovered hot water to the water heater in a manner that affects operation of a heating element of the water heater. | 12-31-2015 |
20160003485 | HOT WATER RECOVERY - 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. | 01-07-2016 |
20160178238 | FEED WATER HEATER WITH RECOVERY DEVICE FOR SWELLING WATER | 06-23-2016 |