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| Number | Title | Issue Date |
| 8044310 | Combination pressure switch A combination switch including a pressure switch moveable between closed and open positions in response to a working pressure of a fluid, an unloader valve moveable between open and closed positions, a mechanical interconnection between the pressure switch and the u... | 10/25/2011 |
| 7902469 | Perforation gun pressure-actuated electrical switches and methods of use Pressure-actuated electrical switches are provided that comprise a housing having a slidable piston therein. The slidable piston slides from a first position to a second position and in so doing switches an electrical path from a first electrical contact and a secon... | 03/08/2011 |
| 7893371 | Pressure switch In a pressure switch, a joint coupling holder is installed in a case of a housing through an opening, and a joint coupling, to which piping is connected, is connected to the joint coupling holder. The joint coupling holder includes a protective wall therein, which i... | 02/22/2011 |
| 7777142 | Pressure switch A compact pressure switch that causes little error in the operating point of the switch and that has resistance to dust, water, and chemical solutions is provided. The pressure switch includes a housing (2) formed of a resin having chemical solution resistanc... | 08/17/2010 |
| 7700887 | Variable differential adjustor A variable differential adjustor for a fluid pressure-actuated switch, with the fluid, in the preferred form of the invention, being air. The restrictor has a restrictor housing having a passage through which a pressure source has a portion which passes on its way t... | 04/20/2010 |
| 7390984 | High power liquid dielectric switch Method and apparatus for switching high power at high repetition rates. The apparatus is preferably a switch utilizing a pressurized flowing dielectric. The pressurized dielectric suppresses growth of dielectric breakdown byproducts, such as large bubbles and breakd... | 06/24/2008 |
| 7351926 | Rotation-proof enclosure for pressure switch housing A housing for a pressure switch is coupled to a pipeline. The housing has a tubular body with an explosion-proof enclosure attached to the body with a retainer sleeve inserted through an opening in the enclosure and threaded into the body to secure the enclosure to ... | 04/01/2008 |
| 7348509 | High pressure switch with isolated contacts A pressure switch employs electrical contacts isolated from pressure media. By employing a snap action blade in a snap over center configuration, it is possible to provide a hysteresis effect in which the switch actuates at one pressure and deactuates at a different... | 03/25/2008 |
| 7339126 | Variable differential adjustor A variable differential adjustor for a fluid pressure-actuated switch, with the fluid, in the preferred form of the invention, being air. The restrictor has a restrictor housing having a passage through which a pressure source has a portion which passes on its way t... | 03/04/2008 |
| 7312412 | High power liquid dielectric switch Method and apparatus for switching high power at high repetition rates. The apparatus is preferably a switch utilizing a pressurized flowing dielectric. The pressurized dielectric suppresses growth of dielectric breakdown byproducts, such as large bubbles and breakd... | 12/25/2007 |
| 7309841 | Manual reset switch cover assembly The present invention is concerned with cover assemblies for manually resetting pressure switches used on oil and gas pipelines. The cover assembly encloses a volume of space on the pressure switch that houses a reset switch which is activated by depressing a button... | 12/18/2007 |
| 7297885 | Pressure switch A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts. | 11/20/2007 |
| 7272919 | Portable vacuum device A portable vacuum device for extracting fluid in a container having an opening includes a handheld housing, a fluid extracting nozzle, a vacuum device and a sensor switch. The fluid extracting nozzle has a vacuum pressure corresponding to an interior pressure of the... | 09/25/2007 |
| 7271007 | Microscale diffusion immunoassay Methods and apparatuses are provided for determining presence and concentration of analytes by exploiting molecular binding reactions and differential diffusion rates. Analyte particles and binding particles are allowed to diffuse toward each other, and slowing of t... | 09/18/2007 |
| 7270786 | Methods and systems for processing microfluidic samples of particle containing fluids The present invention relates to a microfluidic system for processing a cell-containing liquid. The system includes a microfabricated substrate having an enrichment channel to prepare an enriched cell sample from the cell-containing liquid. A flow through member is ... | 09/18/2007 |
| 7268100 | Shale inhibition additive for oil/gas down hole fluids and methods for making and using same An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclo... | 09/11/2007 |
| 7258837 | Microfluidic device and surface decoration process for solid phase affinity binding assays This invention provides a microfluidic device for use in the detection of one or more analytes in a fluid using solid-phase affinity binding assays. The device offers a practical, easy-to-use, portable, inexpensive, robust analytical system for the parallel and quan... | 08/21/2007 |
| 7238897 | Contact sensor and method for making the same A contact sensor includes a base, a wall device securely attached to the top face of the base and having a hole defined in the wall device to correspond to the top contacts so as to allow the top contacts of the base to be exposed and a chip receiving space defined ... | 07/03/2007 |
| 7223371 | Microfluidic channel network device Described herein is microfluidic device for joining fluids and a related method for doing the same. The device according to the present invention includes a microfluidic junction, an outlet channel, and a plurality of circuit units. A microfluidic junction is an are... | 05/29/2007 |
| 7214298 | Microfabricated cell sorter The invention provides a microfabricated device for sorting cells based on a desired characteristic, for example, reporter-labeled cells can be sorted by the presence or level of reporter on the cells. The device includes a chip having a substrate into which is micr... | 05/08/2007 |
| 7193168 | Pneumatic switch for non-invasive testing and debug A pneumatic switch includes a housing which presents external contacts spaced apart to engage a component site on a device such as a circuit board. A pair of components are supported on the switch housing. A flexure mounted armature or vane is biased in one directio... | 03/20/2007 |
| 7192557 | Methods and systems for releasing intracellular material from cells within microfluidic samples of fluids The present invention relates to a microfluidic system for processing a cell-containing liquid. The system includes a lysing zone to receive the cell-containing sample and a positioning element to position the cell-containing sample in a lysing position in the vicin... | 03/20/2007 |
| 7186934 | Pressure switch An indication displayed by a display unit included in a pressure switch is inverted and the respective setting functions of push-button switches are reversed when the operator is obliged to look at the display unit from a direction opposite a normal looking directio... | 03/06/2007 |
| 7157653 | Magnetic latching switch A magnetic latching switch includes a housing having mounted therein a movable electrical control structure normally retained in a first position with a stationary electrical lug structure. The electrical control structure and the electrical lugs are held together b... | 01/02/2007 |
| 7127875 | Portable vacuum device A portable vacuum device for extracting fluid in a container having an opening includes a handheld housing, a fluid extracting nozzle, a vacuum device and a sensor switch. The fluid extracting nozzle has a vacuum pressure corresponding to an interior pressure of the... | 10/31/2006 |
| 7124765 | Dishwasher having a water softener with a salt container located in the dishwasher door A dishwasher includes a door, a washing tub closable by the door, and a water softener including an ion exchanger and a salt container. The salt container is disposed in an area of the door and includes a first and a second side wall, a bottom, narrow connecting wal... | 10/24/2006 |
| 7112753 | Pressure switch A water pressure switch employs two pivotable plates and springs to control the activation of the pump. The arrangement of the two pivotably plates, the springs and the activation device reduces the space required so that a small box can accommodate all the parts. | 09/26/2006 |
| 7098412 | Pressure activated latching switch A structure embodying a switch and method of operating thereof for creating a latching switch is disclosed. The latching switch utilizes an electrorheologic fluid and the electronic latch function thereof is actuated by a pressure signal and deactivated by the remov... | 08/29/2006 |
| 7084363 | Variable differential adjustor A variable differential adjustor for a fluid pressure-actuated switch, with the fluid, in the preferred form of the invention, being air. The restrictor has a restrictor housing with a fluid passage in which a restrictor plug, typically a set screw, is engaged. By j... | 08/01/2006 |
| 7080996 | Coupling arrangement for subsea electrical power distribution A coupling arrangement for use in subsea electrical power distribution comprising a first coupling part (1a), which is provided with a first contact member (3a) arranged in a first contact housing (2a) and an attachment (... | 07/25/2006 |
| 7071429 | Linear adjustment operator for pressure control of paint pumps A linear adjustment operator for pressure control of paint pumps including a base, an electrical switch, a linear actuator, a spring biasing the switch towards the actuator and a lever acting on the actuator for repositioning the actuator with the switch positioned ... | 07/04/2006 |
| 7066198 | Pressurized fluid controller using tilt / push / pull operator An intuitive pressurized fluid controller using tilt/push/pull (3 axis) operator includes a swivel joint such that it can move axially and tilt. A first array of valves is arranged to be activated as the lever tilts. A second array of valves is arranged so they can ... | 06/27/2006 |
| 7045726 | Pressure regulator for a paint ball gun A pressure regulator for a paint ball gun includes a cylinder, a piston unit, an elastic member, a top connector and a switch bolt. The cylinder includes upper and lower chambers. The piston unit includes a ring plate and a tube. The ring tube is disposed in the upp... | 05/16/2006 |
| 7011791 | Microfluidic devices for rotational manipulation of the fluidic interface between multiple flow streams Microfluidic devices and methods are provided for enhancing detection of a diffusion pattern formed by particles diffusing between at least two fluid streams in parallel laminar flow such that an interface is formed between them by increasing the dimension of the st... | 03/14/2006 |
| 7001716 | Continuous flow methods for monitoring time dependent reactions Methods for monitoring time dependent reactions that comprise providing a flow channel, typically microscale in dimension, flowing at least two reagents into the flow channel and varying the flow rate of the mixture through the flow channel. By increasing and/or dec... | 02/21/2006 |
| 6948481 | Electrical connections for an integrated pressure management apparatus An apparatus, system and method of establishing a threshold for a leak detection test that is performed on a headspace of a fuel system. A fuel vapor pressure management apparatus includes a housing, a pressure operable device, and a sensor. The housing defines an i... | 09/27/2005 |
| 6919046 | Microfluidic analytical devices and methods Modular microfluidic systems includes a plurality of microfluidic modules, each capable of performing fluidic operations including, but not limited to, filtering, splitting, regulating pressure, mixing, metering, reacting, diverting, heating, cooling, and condensing... | 07/19/2005 |
| 6900401 | Toxic gas fitting interlock A method and apparatus relating to the safe handling of toxic gases are presented, including a gas fitting interlock apparatus comprising a pedestal portion; a fitting support portion disposed on the pedestal portion; an interlock nut clamp configured to be fastened... | 05/31/2005 |
| 6717079 | Electrical switches and methods of establishing an electrical connection An electrical switch includes a tubular housing constructed substantially of a non-conductive material, a first electrical contact positioned at one end of the housing, a second electrical contact positioned at a second end of the housing, and a shuttle selectively ... | 04/06/2004 |
| 6633010 | Compact, sealed pressure switch A pressure switch 1 of this invention comprises a base electrode 2, a terminal 3, a disc 4 and a diaphragm 5. The base electrode 2 has a switching chamber 7 for inserting the contact part 3a of the terminal 3. The switching chamber 7 is sealed with an ins... | 10/14/2003 |
