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| Number | Title | Issue Date |
| 7416903 | Wavy interface mixer The present invention provides methods and apparatus for mixing samples in-line in a microfluidic system, comprising methods of and means for introducing a first fluid sample into a flow-tube at a first end at a first velocity via a first conduit; methods of and mea... | 08/26/2008 |
| 7318912 | Microfluidic systems and methods for combining discrete fluid volumes Microfluidic devices capable of combining discrete fluid volumes generally include channels for supplying different fluids toward a sample chamber and means for establishing fluid communication between the fluids within the chamber. Discrete fluid plugs are defined ... | 01/15/2008 |
| 7195229 | Automatic sampler In a direct injection type automatic sampler, a sampling needle having a liquid sample collected from a sample vessel by using suction force of a pump is inserted into an injection port. Then, a flow path-switching valve is rotated to switch a flow path to make a fl... | 03/27/2007 |
| 7192559 | Methods and devices for high throughput fluid delivery Methods and devices for delivering fluids into microfluidic device body structures are described. The methods and devices include the use of fluid manifolds which are integrated or interchangeable with device body structures. Methods of fabricating manifolds are als... | 03/20/2007 |
| 7165569 | Safety shut-off device The invention relates to a safety shut-off device for sections of fluid circuits, which in case of damage or the like, have to shut off from each other on safety considerations. The safety shut-off device includes two chambers with connections for the sections to be... | 01/23/2007 |
| 7118910 | Microfluidic device and methods of using same A variety of elastomeric-based microfluidic devices and methods for using and manufacturing such devices are provided. Certain of the devices have arrays of reaction sites to facilitate high throughput analyses. Some devices also include reaction sites located at th... | 10/10/2006 |
| 7032842 | Spray element for a spray head In a spray element for a spray head for spraying the molds of pressure casting machines, a control piston for the release of the parting agent supply is disposed beside the spray nozzle and a connecting passage opens in a chamber of the housing in which one end of t... | 04/25/2006 |
| 6571817 | Pressure proving gas valve A pressure proving gas valve insures safe and efficient operation of a fuel-burning appliance by monitoring combustion air pressure and appropriately controlling the valve based upon this air pressure. An air pressure sensor is incorporated into a pressur... | 06/03/2003 |
| 6520076 | Oil pressure device An oil pressure device is disposed on a hoist frame. The hoist frame has an upper panel and a middle panel. An oil cylinder is disposed on the upper panel. The oil pressure device has a pneumatic pump having a lower cover and a pneumatic cylinder, a base ... | 02/18/2003 |
| 6220270 | Brake velocity fuse An improved the velocity fuse valve controls communication between first and second brake valves and first and second brake lines. The velocity fuse valve includes a valve housing having a valve bore which slidably receives a valve spool. The spool moves ... | 04/24/2001 |
| 6109288 | Flow control apparatus A flow control apparatus for regulating the flow of hot and cold water through a mixing valve and for preventing undiluted hot water from being inadvertently delivered to a common outlet includes a common chamber and a pair of diaphragm valves on opposite... | 08/29/2000 |
| 6070607 | Differential pressure supply system A control system for producing first and second fluid sources whose pressure difference is regulated to a desired value in response to four fluid supplies of independently variable pressures. The pressure of the first fluid source is not allowed to decrea... | 06/06/2000 |
| 5960809 | Fuel equalizing system for plurality of fuel tanks A fuel equalizing method and system for equalizing the amount of fuel in a plurality of fuel tanks connected to a motor, such as the diesel engine of a truck, is described. The system includes an equalization valve having a first common passage with two f... | 10/05/1999 |
| 5960814 | Counter balanced locking valve A valve assembly includes a check valve element in the output chamber. The check valve element opens to permit forward flow of fluid under pressure in the output chamber from a source toward a load. The check valve element closes to block back flow of flu... | 10/05/1999 |
| 5918621 | Automatic, pressure-sensitive, independent zone, diverter check valve An automatic pressure activated diverter valve with check valve action, made from pressure rated components, that provides flow from one or more independent flow lines to outside storage tank and back to flow line when the flow line is pressurized, withou... | 07/06/1999 |
| 5449051 | Pneumatic oil lubricator A pneumatic oil lubricator for lubricating replenishment mainly has a pneumatic oil pump for pumping oil from a oil reservoir to an oil outlet unit, such as an oil gun. An automatic controlling apparatus is provided which has a hollow unit sleeve, a pisto... | 09/12/1995 |
| 5236001 | Dual fluid remote control valve The remote control valve has connected to it an oxygen supply, an air supply, an underwater oxygen-arc cutting torch and an air cylinder that operates a knife switch. When the oxygen valve on the underwater oxygen-arc cutting torch is depressed the oxygen... | 08/17/1993 |
| 4679778 | Fluid-containing power unit mounting device A fluid-containing power unit mounting device capable of effectively damping vibration in a wide range of frequency is shown. The damping function of the device is accomplished by a mounting rubber forming an internal fluid-containing chamber between a po... | 07/14/1987 |
| 4664084 | Fuel metering system A device for metering pressurized fuel from a fuel pump and to an engine. The device includes a housing having a fuel inlet port connected to the fuel pump, a fuel outlet port connected to the engine and a fuel return port connected to the fuel tank. A va... | 05/12/1987 |
| 4513358 | Lamp comprising automatically actuated louver system A lamp such as a fog lamp for a vehicle is provided with a housing which serves to mount an array of parallel louvers. The louvers are controlled by a heat driven actuator. Such as one which incorporates a shape memory metal actuator element. This actuato... | 04/23/1985 |
| 4446890 | Continuity actuated isolation valve assembly A hydraulic isolation valve (10) will not open if leaks are present in the associated utility subsystem (15). The continuity of the hydraulic fluid circuit actuates the valve (10) to the open position by an energized solenoid operated pilot valve (21) sen... | 05/08/1984 |
| 4227746 | Braking pressure control unit for a dual circuit brake system The braking pressure control unit for a dual circuit brake system comprises a housing with two closure members arranged therein coaxially and in tandem. In their rest position, the closure members are held spaced apart from associated valve seats by a con... | 10/14/1980 |
| 4067348 | Fuel shut-off valve A fuel shut-off valve is described having a body with a cylindrical bore divided into first and second sections by an annular tapered shoulder. A piston is slidably positioned in the bore and inlcudes an O-ring that seats against the tapered shoulder or s... | 01/10/1978 |
| 4044788 | Diaphragm actuated valves A diaphragm actuated valve having inlet, outlet and bypass ports is provided with two independently operating valves on a diaphragm rod stem of a diaphragm assembly. One of the valves operates as a main air valve and the other valve provides positive reli... | 08/30/1977 |
| 4039009 | Hydraulic control system for a tree felling unit At the end of a crane arm on a base vehicle is fixed a frame, the inclination of which is controlled by double-acting hydraulic cylinders, and which supports hydraulically operated grip arms and a cutting unit. The frame is moved with an estimated inclina... | 08/02/1977 |
| 4019525 | Tractor protection valve A tractor protection valve for use in the air brake system of a tractor-trailer vehicle combination to protect and maintain the braking system of the tractor includes a housing having tractor supply and control ports, trailer supply and control ports, and... | 04/26/1977 |
| 3957073 | Pressure balancing valve A pressure balancing valve has a pair of fluid ducts for hot and cold water, a butterfly type valve is located in each duct, a pressure cavity is provided that is in communication with each duct, and a resilient diaphragm mounted in the cavity converts pr... | 05/18/1976 |
