Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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 |
| 7324876 | System for remotely controlling energy distribution at local sites A power management system and associated method includes provision of local wireless energy control units at remote sites for controlling power delivery to customer loads, and a central station with a wireless transmitter for broadcasting commands to the wireless en... | 01/29/2008 |
| 7320434 | Method of controlling electronic controlled thermostat An electronically controlled thermostat control method is obtained which makes it possible to eliminate the response delay from the time that the required cooling water temperature is set to the time that the actual cooling water temperature reaches the set water te... | 01/22/2008 |
| 7313917 | Volume phase transition to induce gel movement Movement of a gel structure is propagated by successively applying external stimuli to cause volume phase transition in the gel structure by alternately causing the gel structure to collapse and swell to move the center of mass of the gel structure in the direction ... | 01/01/2008 |
| 7265652 | Controllable electronic switch A controllable electronic switch for, e.g., controlling power distribution comprises a deformable member such as a bimetal arm that can be deformed to break an electrical path. The deformable member may be anchored at one end and in controllable contact with an elec... | 09/04/2007 |
| 7246941 | Sensing media temperature in an HVAC valve An apparatus and method are provided for determining the temperature of an operating fluid media in an HVAC system. An integral temperature sensor, mounted within an actuator of an actuator-driven HVAC valve, senses the temperature of a valve body of the HVAC valve.... | 07/24/2007 |
| 7182171 | Muffler with variable acoustic properties A muffler with variable acoustic properties. A pressure cell with a diaphragm, a spring, a piston, a piston rod, a closing element on the piston rod, and a pressure connection line are integrated into a housing. The diaphragm is thermally insulated against the pisto... | 02/27/2007 |
| 7172133 | Heatable dilation element Expansion or elastic material working element, particularly for operating a thermostatic valve, having a housing and a movable working pin led out of the housing, the housing containing expansion material and a heating device with an electrical resistance element ap... | 02/06/2007 |
| 6931892 | Drainage control device for washing machines A drainage control device for washing machines is disclosed. This device controls the drain port, provided at the bottom of a washing tub, thus draining water from the washing tub in accordance with an operational mode of a washing machine. This drainage control dev... | 08/23/2005 |
| 6923204 | Diaphragm-operated fluid flow control valve providing a plurality of flow levels A fluid flow control valve uses a servo valve to control the pressure in a main diaphragm chamber defined by a main diaphragm. The main diaphragm carries a main valve element that assumes either a low flow or a high flow position relative to a valve seat depending o... | 08/02/2005 |
| 6764020 | Thermostat apparatus for use with temperature control system A thermostat apparatus is provided. The thermostat apparatus comprises a thermostat and a positioner for establishing different operating temperatures for thermostat. ... | 07/20/2004 |
| 6761321 | Thermostat device An object of the present invention is to provide a thermostat device which enables a valve body to operate with stability, which can prevent overshoot and hunting, and in which the size of the thermostat device itself can be reduced. A first valve body and a second ... | 07/13/2004 |
| 6592046 | Thermostat device Provided is a thermostat device enabling stable valve element operation and capable of preventing overshoots and hunting, and which enables the miniaturization of the thermostat device itself. Inside the housing of a bottom bypass-type thermostat device c... | 07/15/2003 |
| 6471134 | Thermostatic device having two regulating conditions and two thermostatic elements A device, which can be used in the cooling circuits of internal combustion engines comprises a chamber (3) having at least three ports (4, 5, 6) two of which can be closed off by valves (9, 10) carried by a main thermostatic element (7) housed partially i... | 10/29/2002 |
| 6446876 | Apparatus with integrated shape memory actuator for regulating the flow of air in a conduit, particularly for air-conditioning systems in motor vehicles Apparatus comprising a plurality of Venetian blind slats controlled by an actuator rod associated to one side of a frame supporting the pivoting slats. The actuator rod is controlled by a metallic alloy shape memory wire associated to said rod, which is p... | 09/10/2002 |
| 6439467 | Thermostatic device with two levels of regulation operated selectively A thermostatic device comprises a chamber with ports, at least one of which can be closed off by a valve carried by a moving part of a metering thermostatic element. In order to obtain two reliable levels of regulation, and to maintain regulation unless t... | 08/27/2002 |
| 6152376 | Valve modulation method and system utilizing same A valve modulation method and a system utilizing the method is provided. In a hydronic heating system having primary and secondary loops, a simple two-position valve is powered on an intermittent duty cycle to regulate the amount of flow of boiler water f... | 11/28/2000 |
| 6109588 | Two-way variable-section control valve for a refrigeration circuit A two-way variable-section control valve for a refrigeration circuit, having a movable member for choking a refrigerant passage interposed between the inlet and outlet of the valve; the position of the movable member is controlled by a wax actuator having... | 08/29/2000 |
| 6047895 | Multiple-way valve A compact, quiet, electrically actuatable multiple-way valve, in particular for coolant circulation in an internal combustion engine, includes an inlet duct and at least two outlet ducts branching off from a collecting chamber, each outlet duct being resp... | 04/11/2000 |
| 6012299 | Process for the control of a refrigeration system, as well as a refrigeration system and expansion valve A process for controlling a refrigeration system, as well as the refrigeration system and a new expansion valve for the refrigeration system. An electronic regulator is used to operate a sensor system having a device for applying heat power to the sensor ... | 01/11/2000 |
| 6000415 | Method and apparatus for positioning a restrictor shield of a pump in response to an electric signal Apparatus, positioned at an inlet port to a pump, for shielding the pump from a process chamber of a semiconductor wafer processing system, where the apparatus has a controllably variable effective throughput area, and method for electrically controlling ... | 12/14/1999 |
| 5971288 | Expansion composition A thermostatic control valve has an expansion composition held in a cavity thereof. The composition contains electrical conductor particles dispersed throughout an electrical isolator. The particles conduct electrical current through the isolator when the... | 10/26/1999 |
| 5941086 | Expansion valve unit A thermal expansion valve unit comprises a closed vapor system, which includes a temperature sensing chamber in thermal communication with a source such as a two phase refrigerant, and a pressure chamber with a deformable member, the position of which con... | 08/24/1999 |
| 5775270 | Thermostatic valve for the coolant circulation system of an internal-combustion engine For a thermostatic valve in the coolant circulation system of an internal-combustion engine having an expansion material element penetrating the main valve for the cold-side stationary support and the hot-side driving connection with the valve disk of the... | 07/07/1998 |
| 5676308 | Thermostatic valve A thermostatic valve has a multi-part valve housing which forms a mixing or distributing chamber which is provided with engine connections for an engine inlet, an engine outlet and a radiator connection. An electrically heatable thermostatic working eleme... | 10/14/1997 |
| 5385296 | Electrically heatable thermostatic valve for a coolant circulating system of an internal-combustion engine An electrically heatable thermostatic valve for a coolant circulating system of an internal-combustion engine in which the housing of a thermostatic working element is arranged in a stationary manner and is provided with feed lines for a heating element. ... | 01/31/1995 |
| 5353828 | Valve construction and method of making the same A valve construction and method of assembling the same are provided, the valve construction having a deflector unit for directing fluid flow from the inlet of the housing means of the valve construction away from an operating part of a bimetallic lever me... | 10/11/1994 |
| 5148978 | Cooling machine and an optimalized thermostatic expansion valve therefor The invention relates to a cooling machine having a cooling cycle in which coolant circulates, which cooling cycle comprises: 1) an evaporator: 2) a compressor; 3) a condenser; 4) a thermostatic expansion valve whereof a bulb is connected to a coolant outlet o... | 09/22/1992 |
| 5143287 | Control device for a system regulating the ventilation flow of a controlled-atmosphere room, and functioning cycles thereof The invention relates to a control device for a system for regulating the ntilation of a controlled-atmosphere room. The system has at least one sensor located in the room to pick up desired information such as temperature, humidity, carbon dioxide level,... | 09/01/1992 |
| 5083439 | Control device having a shape memory wire, refrigerator system utilizing the control device and methods of making the same A control device, refrigerator system utilizing the control device and methods of making the same are provided, the control device comprising a housing having a valve seat and having an inlet and an outlet interconnected together by the valve seat, a mova... | 01/28/1992 |
| 5037061 | Valve construction and method of making the same A valve construction and method of making the same are provided, the valve construction comprising a housing provided with a chamber therein and with an inlet leading to the chamber and outlet leading from the chamber, a valve seat carried by the housing ... | 08/06/1991 |
| 4958801 | Valve construction and method of making the same A valve construction and method of making the same are provided, the valve construction comprising a housing provided with a chamber therein and with an inlet leading to the chamber and outlet leading from the chamber, a valve seat carried by the housing ... | 09/25/1990 |
| 4809947 | Flow regulation valve The regulating valve has a heat responsive extension element which is prestressed and which extends crosswise of the gas line. The extension element biases the valve body into sealing engagement with the valve seat to maintain the valve in a normally clos... | 03/07/1989 |
| 4799577 | Telescopic hydraulic shock absorber with temperature sensitive wire to control damping A telescopic hydraulic shock absorber with controlled damping comprising a cylinder (1), within which a piston (6) connected to the end of a rod (7) can reciprocate, the piston having at least one restricted passage (12) interacting with an elastic flap (... | 01/24/1989 |
| 4776559 | Valve actuated by a device containing an expandable wax associated with thermistors The present invention is a valve and valve housing designed for controlling the flow of water into washing machines comprising a molded plastic housing (1) with an inlet coupling (2) connecting the valve to the water supply, and an outlet coupling (3) con... | 10/11/1988 |
| 4754920 | Compact operator for gas control valves A compact linear operator is provided for a gas valve. The operator may be of modular form for operative combination with combination gas controls of existing design, as by threaded engagement with an existing threaded bore in the control. The operator is... | 07/05/1988 |
| 4739925 | Power driven valve actuator A power driven valve actuator includes a thermostatic device which is movably supported in a housing to accommodate overtravel of a thrust member against the stem of the valve resulting from excess expansion of a thermostatic element enclosed in the therm... | 04/26/1988 |
| 4685651 | Thermostatic control devices A capsule of a thermic control device contains a substance which expands when heated by an electrical resistor to displace a piston. Devices are disclosed wherein the capsule is disposed transversely in a pipe which carries a circulating fluid, and the fr... | 08/11/1987 |
| 4666081 | Programmable thermostat and system therefor A thermostat member (10) disposed within a coolant flow passage (12) of an engine comprises a valve (32,34,36,40,42) movable between first and second positions for opening and closing the flow passage (12) and when in the first condition prohibiting coola... | 05/19/1987 |
| 4651968 | Valve construction and method of making the same A valve construction and method of making the same are provided, the valve construction comprising a housing, a valve seat carried by the housing, a movable lever carried by the housing and having an opening passing through opposed sides thereof, a valve ... | 03/24/1987 |
| 4593882 | Zone control valve A zone valve of the type using a heat motor includes a biasing spring that operates on a lever, the lever operating on a valve. The spring includes arms that slidingly engage the lever. The arms each include a bent portion adjacent the point of contact wi... | 06/10/1986 |
