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| Number | Title | Issue Date |
| 7462996 | Method of operating a lamp with a power controller having current limited RMS regulated output A method for converting a line voltage to an RMS load voltage in a lamp includes providing a control circuit which includes a switch and a microcontroller that operates the switch to establish an RMS load voltage for the lamp. The load voltage of the lamp is sensed ... | 12/09/2008 |
| 7456578 | Circuit arrangement having protective circuit and modification apparatus A circuit arrangement has a drive circuit for a lamp having a first connection for a first filament of the lamp and a second connection for a second filament of the lamp, a protective circuit, coupled on the output side to the drive circuit and on the input side to ... | 11/25/2008 |
| 7446480 | Apparatus and method for switching a light source An apparatus and its corresponding method for switching a light source are provided. The apparatus includes a light sensor, a decision device and a light source. The light sensor senses the ambient luminance and outputs a sensing signal to indicate whether the lumin... | 11/04/2008 |
| 7446483 | Backlight light source drive device This backlight light source drive device includes a plurality of backlight light source drive circuits which drive a plurality of respective backlight light sources, and a control circuit which turns those drive circuits ON and OFF. Each of the drive circuits includ... | 11/04/2008 |
| 7443102 | Energy-conserving devices of illumination systems Disclosed is an energy-conserving device for an illumination system. The energy-conserving device is connected between a power supply of and a lighting assembly of the illumination system. The energy-conserving assembly provides a first switch, a ballast, and a comp... | 10/28/2008 |
| 6952518 | Dispersion-shifted single-mode fiber having low dispersion slope for large capacity transmission The invention relates to a low dispersion slope dispersion-shifted single-mode fiber for large capacity transmission comprising a core and a cladding. Said fiber is characterized in that said core has three to five core segments having different refractive index pro... | 10/04/2005 |
| 6873777 | Two-dimensional photonic crystal device Columnar pillars are arranged in a square lattice pattern to form a two-dimensional photonic crystal. The two-dimensional photonic crystal has crystal defects created by the absence of pillars, and a resonator is formed in a line waveguide provided by the crystal de... | 03/29/2005 |
| 6263909 | Valve assembly A valve assembly for a hydraulic discharge device and including a piston displaceable in a bore of a housing of the discharge device against a biasing force and having an outer surface, which sealingly engages an inner wall of the housing bore and blocks ... | 07/24/2001 |
| 6182696 | Dual isolation valve with rectangular flow passageways A dual isolation valve comprises: a valve body with opposed inlet and outlet ports that defines an inner cavity; a first valve member; and a second valve member. The first valve member (preferably a plug) has a narrower first end and a wider second end an... | 02/06/2001 |
| 6152171 | Check valve A check valve is positioned in and between opposed tube ends and includes a valve body having a valve seat engageable by a valve element having a stem extending centrally of peripherally spaced apart elements interconnected by an annular end shoulder enga... | 11/28/2000 |
| 6152170 | Differential relief valve for flexible sea line Differential valve for a sub-sea flexible pipe having a valve body comprising an upper part communicating with the outside via at least one upper communication passage and a lower part communicating with at least one annulus of the flexible pipe via at le... | 11/28/2000 |
| 6148848 | Multicannular fluid delivery system with pressure sensitive alarm The instant invention consists of an inner cannula of hosing amenable to transport of a liquid coupled with an outer cannula of hosing amenable to transport of a gas. As respects one embodiment, affixed to outer walling of the inner cannula and to inner w... | 11/21/2000 |
| 6148860 | Low volume vacuum toilet assembly A vacuum tank assembly has a low volume configuration so that it can be used in boats and recreational vehicles where space is at a premium. A stack of components, with a waste tank at the bottom, then a vacuum tank with directly connected vacuum pump, an... | 11/21/2000 |
| 6142163 | Method and apparatus for pressure control in vacuum processors A method and apparatus is disclosed for controlling the pressure of a reaction chamber in wafer processing equipment. The disclosed apparatus and method uses a ballast port for inserting gas into the evacuation system, thereby controlling the pressure in ... | 11/07/2000 |
| 6142183 | Electromagnetic proportional valve An electromagnetic proportional valve with an outlet chamber that communicates via a fixed valve with a first valve chamber and via a movable valve with a second valve chamber. A valve seat of the fixed valve is embodied on the valve body and the valve se... | 11/07/2000 |
| 6135144 | Pressure relief valve assembly A pressure relief valve assembly for relieving fluid pressure in an exhaust outlet includes a deformable fluid passage in fluid communication with the exhaust outlet. The passage is blocked by a poppet disposed in the passage for discouraging fluid firm p... | 10/24/2000 |
| 6131594 | Gas cartridge actuated isolation valve An isolation gate valve (10, 10a, 10b, 124, 146, 210) is provided which has a valve body (12, 126, 212) presenting a passageway (14, 214) therethrough; a shiftable, apertured gate member (18, 224) is located within the body (12, 126, 212) and is shiftable... | 10/17/2000 |
| 6129116 | Sealing devices A sealing device for a vacuum air opening (10) of a dust bag or other dust collecting container (5) for a vacuum cleaner, has an elastic membrane (1) deflected and centrally fixed in a vacuum air opening tube (4) by means of a fixing element (2). Deflecti... | 10/10/2000 |
| 6125878 | Sewer inspection chamber with back-flow prevention valve and method and apparatus for installing valve in sewer inspection chamber An inspection chamber for use in sanitary sewer systems has an integral back-flow prevention valve. The valve can be installed through an access pipe with the inspection chamber in place underground. The valve does not interfere with the installation or r... | 10/03/2000 |
| 6123101 | Spring body excess flow valve An safety valve includes a housing for defining a fluid flow passageway having a spring loaded seat body and spring mounted therein. The seat body is held in an open position by the spring and is composed of an elastomer material. According to the novel m... | 09/26/2000 |
| 6119716 | Valve A valve comprising a valve housing (10), having a valve seat (18) therein, a valve member (16) moveable via a valve spindle (15) between positions spaced from and seated on the valve seat. The valve member is required to lap a plurality of times on the va... | 09/19/2000 |
| 6119723 | Apparatus for varying the flow area of a conduit An apparatus (10) for varying the flow area of a conduit (12). The apparatus comprises a flap (14) mounted in said conduit (12) which is off-center pivotally mounted to pivot in response to flow of fluid (F) through said conduit (12). The apparatus (10) a... | 09/19/2000 |
| 6116277 | Farm coupling A coupling that is useable on farm implements is disclosed. A metal to metal vent valve is employed in the female half of the coupling which constantly vents the supply port to the vent port when the female half is disconnected or partially disconnected f... | 09/12/2000 |
| 6116259 | Method and apparatus for measuring and adjustably controlling vapor-liquid mixing ratio at pipe junctions Methods and apparatus are disclosed for adjusting, measuring and controlling the vapor/liquid ratio of wet steam in the output line of a pipe junction in a two phase fluid flow line. The vapor phase and liquid phase of the two phase fluid are separated in... | 09/12/2000 |
| 6116280 | Spring brake valve having a balance piston with integral quick release A valve assembly for selectively controlling application of a spring brake in a truck brake system having primary and secondary circuits is provided. A spring brake valve is modified to incorporate a balance piston having an integral quick release valve. ... | 09/12/2000 |
| 6105610 | Cartridge valve with triple sequential seal A valve includes a valve body including a recess therein, a valve element movably disposed in the recess and a seal member disposed in the recess. The seal member has first, second and third separate and distinct sealing surfaces which are engageable by t... | 08/22/2000 |
| 6105608 | Gas purge valve A gas purge valve comprising a valve housing that has a valve inlet and major and minor valve outlets, a valve partition mounted in the housing divides the housing into a first chamber communicating with the valve inlet and a second chamber that communica... | 08/22/2000 |
| 6105607 | Microprocessor controled water shut-off device A microprocessor based control system to monitor flow in a potable water system and compare said flow with pre-set programs of time of day and duration of flow, if the pre-set parameters are exceeded the controller will turn off the flow of water.... | 08/22/2000 |
| 6102363 | Actuator for reciprocating air driven devices An actuator valve for an air driven reciprocating device including a housing with a cylinder having a sliding valve piston located therein. The valve piston includes circumferential grooves near the ends of the piston to receive floating piston rings. The... | 08/15/2000 |
| 6102071 | Elastomeric element valve A fluid control valve having a valve body, a cage, and a flexible elastomeric diaphragm with a formed convolution to fully open the cage opening. An elastomeric diaphragm regulator with a flow diverter in the fluid flow path to reduce fluid flow separatio... | 08/15/2000 |
| 6098956 | Electrically operated recreational vehicle drain valve An electrically operated drain valve for recreational vehicles economically fabricated primarily of synthetic plastic parts which is relatively free of corrosion at critical areas and readily retrofitted to existing recreational vehicle drain systems. A h... | 08/08/2000 |
| 6098655 | Alleviating sticking of normally closed valves in nuclear reactor plants Normally closed valves that operate in the environment of nuclear power plants are provided with surface-modified valve seat components to alleviate sticking of the valves. The surface modification is achieved by ion implantation of a coating of, for exam... | 08/08/2000 |
| 6098656 | Check valve For a pipe check valve of a known construction involving a peripheral extending rubber seal and known to be installed by being manually urged through ascending movement in the pipe, the newly added recess below the peripheral seal to receive thereinto a f... | 08/08/2000 |
| 6095190 | Coupling with female half having internal pressure relief A coupling having male and female halves is disclosed. Typically the female half is under pressure. The female half may be mounted to an implement and when coupled to a male coupling on the tractor. It supplies hydraulic fluid to the driven device. The fe... | 08/01/2000 |
| 6095185 | Fluid-flow control device particularly useful as a drip-irrigation emitter A fluid-flow control device particularly useful as a drip-irrigation emitter, includes a housing having first and second housing sections attachable to each other to define an internal chamber. The first housing section includes an inlet opening at one si... | 08/01/2000 |
| 6092551 | Duckbill valve A duckbill valve is provided which includes a hollow cylindrical elastomeric body with first and second ends. The first end has walls parabolically tapering to an elongate slit, the slit being surrounded by an upper and lower lip. The second end has a non... | 07/25/2000 |
| 6089260 | Nested duckbill check valves Disclosed herein are check valve assemblies with enhanced back flow protection. There are at least two duckbilled check valves, each having an inlet at one end and an elastomeric bill formed at an opposite end, the bill having opposed lips and an outlet o... | 07/18/2000 |
| 6089272 | Check valve A check valve (10) including a valve disk (12), wherein the valve disk (12) is so arranged and configured as to be of a thickness sufficiently substantial to prevent the valve disk (12) from exhibiting a significant amount of flexure even under high rever... | 07/18/2000 |
| 6089261 | Drain valve with counterweight A drain system includes a drainpipe and a valve. The valve includes a first and second body and a counterweight assembly. The first body has a passage formed therethrough and is fluidically coupled to the drainpipe. The second body is pivotally coupled to... | 07/18/2000 |
| 6089271 | Gas relief valve for a container Disclosed is a gas relief valve for a container for storing contents generating gases, having a support member having an aperture through which to discharge gases when they are filled in the container, when the gas relief valve is mounted on the container... | 07/18/2000 |
