Bizarre Patents
Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7036520 | Hot water heater recirculation system and method A hot water recirculation system includes a source of hot water, a fixture, a fluid circuit, a fluid pump, and an electrical circuit sensor. The fixture is remote from the source of hot water and is configured to dispense hot water. The fluid circuit extends from th... | 05/02/2006 |
| 6588377 | Process and apparatus for recycling water in a hot water supply system A process and apparatus are provided for conserving water and heat energy in a hot water supply system. A holding tank is provided near the Point Of Use to capture unwanted cooled water. An integrated displacement actuator allows this volume to be recircu... | 07/08/2003 |
| 6453939 | Flotation cell fluid level control apparatus A fluid level control apparatus for selectively controlling the movement of liquid flowing out of a flotation cell is described. The fluid level control apparatus is significantly reduced in size in comparison with the flotation cell or cells to which it ... | 09/24/2002 |
| 6138614 | Inlet tube for a water heater An inlet tube or dip tube for use in a water heater includes a cylindrical tube having near its top end a plurality of outwardly-facing upper openings having a combined upper surface area. The tube also has near its bottom end a plurality of outwardly-fac... | 10/31/2000 |
| 5898818 | Water feed system at constant temperature keeping the hot water from mixing with the cold water fed during use of the hot water in a single tank A water feed system at constant temperature keeping the hot water from mixing with the cold water in a single tank, the cold water being fed during use of the hot water, comprising a cold water filing tube, a solenoid of controlling circuit and a double l... | 04/27/1999 |
| 5823177 | Pumpless solar water heater with isolated pressurized storage A variable volume of solar heated water is stored in an insulated indoor tank. The hot water is indirectly pressurized by incoming cold water, which is accumulated separately to maintain a constant total volume without mixing. A small reduction in the tot... | 10/20/1998 |
| 5735291 | Hot water re-circulating system A hot water re-circulating system (10) in a building (12) comprising a water pump (36) connected between an auxiliary water return line (28) extending from a hot water faucet (22) to a remote hot water heater (14). The water pump (36) is controlled by a t... | 04/07/1998 |
| 5703998 | Hot water tank assembly Hot water heaters are provided which contain improved temperature control devices and multiple resistance wire heating elements. The temperature control devices selectively deactivate at least one of the resistance wires to conserve electricity and preser... | 12/30/1997 |
| 5701387 | Storage tank water heater tempering system A hot water tempering system for use with a standard water heater storage tank includes a heat exchanger interposed between the hot water outlet means and the cold water inlet means for transferring heat from hot water exiting from the tank to cold water ... | 12/23/1997 |
| 5671771 | Hot water system A hot water plumbing system comprising a water heater, a delivery location, a delivery line delivering water from said heater to said delivery location, a riser located adjacent said delivery location and extending upward above the level of said heater, a... | 09/30/1997 |
| 5626287 | System and method for controlling a water heater A system for controlling a water heating system senses the temperature of new (unheated) water and uses any drop in that temperature as an early, quantitative measure of the demand for hot water within the system. The heater itself is turned "on" and "off... | 05/06/1997 |
| 5622203 | Hot water circulation apparatus with adjustable venturi A dual mode water circulation apparatus for installation in a water supply line in a building upstream of a water heater provides continuously heated water at one or more remote hot water faucets. The apparatus is connected in a water return loop that inc... | 04/22/1997 |
| 5603344 | Apparatus for recovering and saving chilled water in hot water lines having adjustable thermostatic control A water saving device for use with domestic hot water systems of the noncirculating storage tank heater type uses a hydraulic motor to drive a water pump to pump water from the hot water pipe to a cold water pipe. Pumping begins when a hot water tap conne... | 02/18/1997 |
| 5588088 | Hot water tempering system utilizing a storage tank, a bypass line and a proportional flow controller A hot water tempering system tempers the output of a hot water storage tank by mixing that output with a cold water flow in a defined ratio to produce a flow of water at a steady intermediate temperature. The system comprises a bypass line connectable bet... | 12/24/1996 |
| 5586572 | Hydrothermal stabilizer Plumbing apparatus is provided for reducing energy consumption of a hot water heater, the apparatus includes a tank and a buoyant piston movably disposed within the tank and having a perimeter slidably engaging an inside wall of the tank. Water entering a... | 12/24/1996 |
| 5584316 | Hydrothermal stabilizer and expansion tank system Plumbing apparatus is provided for reducing energy consumption and controlling increases in water pressure of a hot water heater. The apparatus includes a tank and a buoyant piston movably disposed within the tank and having a perimeter slidably engaging ... | 12/17/1996 |
| 5564462 | Water conservation delivery system using temperature-controlled by-pass circuit A temperature controlled water recirculation system includes an adjustment valve for adjusting the quantities of water received from hot and cold water lines are fed to a shower nozzle. A controller, such as a temperature sensor, a timer, fluid flow meter... | 10/15/1996 |
| 5544645 | Combination water heating and space heating apparatus A combination water heating and space heating apparatus includes a water heating unit and a space heating unit releasably coupled with the water heating unit. The water heating unit has a water storage tank and a helically wound tubular heat exchanger ins... | 08/13/1996 |
| 5524666 | Water conservation system Domestic water conservation piping system has thermostatically controlled diverter valve in series with water heater and shower head and/or a hot water shunt tube extending from the hot water heater to the fixture hot water supply in parallel with the the... | 06/11/1996 |
| 5518022 | Aspirator water circulation apparatus A water circulation apparatus to provide instant hot water to faucets remote from the heater in residential and small commercial buildings when water is periodically used in the building. The apparatus comprises a body containing an aspirator and a check ... | 05/21/1996 |
| 5511579 | Water conservation recirculation system The present invention is a water conservation system that provides instant hot water at a user's sink. The system includes a backflow line positioned between the cold water line and a thermal switch. A check valve is placed in the backflow line to prevent... | 04/30/1996 |
| 5459890 | Water blending and recycling apparatus A programmable electronic control controls water flow from a first electronically controlled valve assembly which receives water from the first water source, e.g. cold water. A second electronically controlled valve assembly is under the control of the pr... | 10/24/1995 |
| 5421404 | Storage tank for water heaters and the like with filling dip tube A storage tank for water heaters and the like having a vertical, cylindrical tank, with a curved top wall, means for heating water within the tank, a cold water inlet and a hot water outlet at the top includes an inlet dip tube with means for transferring... | 06/06/1995 |
| 5385168 | Hot water demand appliance and system A hot water appliance is provided with an accelerated delivery system which includes a pump interconnected between hot and cold water fittings and a control system for causing the pump to circulate water from the hot water fitting into the cold water fitt... | 01/31/1995 |
| 5377661 | Wood burning stove for heating water A stove for the generation of heat from the burning of wood for heating water and for heating the room in which it is located comprising a drum having cylindrical side walls about a horizontal axis, support legs and circular end walls; an array of tubes i... | 01/03/1995 |
| 5323803 | Instant hot water device An instantaneous hot water device comprises a gate valve means connected to a hot water line and having a gate valve and a gate valve seat providing a controlled flow of hot water from the hot water line into a ball valve means having a ball check and a f... | 06/28/1994 |
| 5317670 | Hot water storage system A hot water system for connection to a water supply and a local hot water usage system, comprising a plurality of series-connected reserve tanks and demand tanks for receiving water from the water supply, heating the received water to a desired temperatur... | 05/31/1994 |
| 5279319 | Water pressure relief method and system for water heaters A system for alleviating leakage or weepage from a pressure relief valve found on conventional hot water heater tanks due to water pressure build-up in residential water lines caused by the application of intense heat with fast recovery type hot water hea... | 01/18/1994 |
| 5277219 | Hot water demand system suitable for retrofit A hot water recovery system includes a hot water source; a hot water delivery line connected between said hot water source and at least one plumbing fixture along with a cold water delivery line connection between said plumbing fixture, a cold water sourc... | 01/11/1994 |
| 5273209 | Heat exchange and fuel feed apparatus for vertical furnace A heating unit and solid fuel feeder comprises a vertical furnace having a combustion chamber for burning solid fuel, a water jacket around the combustion chamber and an exhaust chamber at an upper outlet end of the combustion chamber. A plenum box is con... | 12/28/1993 |
| 5261443 | Watersaving recirculating system A water saving recirculating system (10) for a conventional water supply system (100) wherein: a fluid coupling (14) and solenoid valve (15) are disposed intermediate the hot water feed line (106) and a first cold water feed line (102); a one way check va... | 11/16/1993 |
| 5226594 | Hot water storage tank heat exchanger system A heat storage system for a fuel fired prime mover driven space conditioner. Rejected heat from the prime mover is advantageously stored in a storage type potable hot water heater. Heat is transferred from a coolant fluid for the prime mover by forcibly c... | 07/13/1993 |
| 5205318 | Recirculation hot water system Recirculation hot water system including a fluid delivery system used to supply potable water throughout a home or other facility, having a hot water supply pipe, a cold water supply/return pipe, a hot water heater, a pump, a manifold, a control system, a... | 04/27/1993 |
| 5203500 | Apparatus and method for converting an electric water heater to use gas An apparatus and method for providing a hot water supply for a building such as a mobile home, house, or business. A hot water storage tank is positioned within the building. A gas-fueled burner is positioned outside the building adjacent a heat exchanger... | 04/20/1993 |
| 5135021 | Plumbing appliance A valve body with a hollow interior chamber. Hot liquid and cold liquid conduits provide for transporting hot liquid and cold liquid from a hot liquid source and a cold liquid source to the hollow chamber. The valve body has a pair of passages joining the... | 08/04/1992 |
| 5115491 | Tempering system for storage tank water heaters utilizing inlet and outlet heat exchanger A fluid tampering system for use with a standard water heater storage tank includes a heat exchanger which interposed between the outlet means for conveying heated fluid from the storage tank to a distribution system and the cold fluid inlet means, so tha... | 05/19/1992 |
| 5105846 | Water conserving purge system for hot water lines A purge line to return cooled water in a hot water line directly to a cold water line to avoid wasting water by draining the cooled water while awaiting arrival of hot water at a hot water outlet valve. The purge line is connected in near adjacency to a h... | 04/21/1992 |
| 5042524 | Demand recovery hot water system A demand recovery hot water system in accordance with the present invention provides for return of hot water from a plurality of plumbing fixtures to a hot water source. A transfer tank is provided with a movable piston which enables circulation of hot wa... | 08/27/1991 |
| 5020721 | Rapid recovery gas hot water heater A rapid recovery gas water heating system having a water storage tank, a gas water heater separate from the storage tank and having a compact heat exchanger for the flow of water therethrough from the storage tank, a water pump for pumping of water from l... | 06/04/1991 |
| 5009572 | Water conservation device Herein described is a compact and self-contained circular water conservation device which can be easily installed in conjunction with existing and non-existing plumbing systems and fixtures having a source of pressurized water, a hot water supply line, a ... | 04/23/1991 |
