Bizarre Patents
An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7631663 | Pilot valve There is disclosed a pilot valve, especially for a servo valve, comprising an actuating motor and a hydraulic preamplifier via which a control pressure difference can be created that acts upon a main slide of a main stage. According to the invention, a blocking mech... | 12/15/2009 |
| 7458394 | Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve A servovalve assembly includes a motor having a flapper shaft. A flapper couples to a first end of the flapper shaft such that the flapper shaft orients the flapper between a first nozzle and a second nozzle of the servovalve assembly. An adjustment assembly adjusts... | 12/02/2008 |
| 7357367 | Embedded high temperature valve A high temperature valve for controlling gas flow includes an outer vessel, a valve housing, and a valve element. The valve housing is disposed at least partially within, and is at least partially surrounded by, a propellant gas flow passageway that is formed in the... | 04/15/2008 |
| 7210500 | Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve A servovalve assembly includes a motor having a flapper shaft. A flapper couples to a first end of the flapper shaft such that the flapper shaft orients the flapper between a first nozzle and a second nozzle of the servovalve assembly. An adjustment assembly adjusts... | 05/01/2007 |
| 7201362 | High temperature resistant seal structure, valve comprising the same and aerospace craft side thruster A thruster valve for controlling a flow of high temperature fluid, comprising a valve casing, a graphite liner, a drive rod, and at least one relief hole. The graphite liner is disposed in a through hole within the valve casing. The drive rod being slidably received... | 04/10/2007 |
| 7192561 | Hydraulically controlled pressure relief valve for high-pressure reactors A high-pressure reactor which has a hydraulically controlled pressure-relief valve. The mechanical design of the corresponding hydraulic system in combination with the control technology used facilitates particularly fast opening of the pressure-relief valve in the ... | 03/20/2007 |
| 7093607 | Methods and apparatus for maintaining pressure gain in a servovalve assembly A servovalve has a sleeve having both a first metering aperture and a second metering aperture in fluid communication with a single port cavity defined by the servovalve. A spool oriented within the sleeve has a first land and a second land and defines a channel ori... | 08/22/2006 |
| 6962317 | Air blast device with improved ejection conduit The invention relates to an air blast device disposed between an inlet conduit (3) designed to be connected to a container designed to accumulate a volume of air and an outlet conduit (5), characterized in that the area (C) of the cross-section of the ... | 11/08/2005 |
| 6755205 | Method to stabilize a nozzle flapper valve A method and apparatus to attenuate a flapper valve from oscillating is presented. An inertia tube is added to the flow path of the flapper valve nozzle, which effectively produces a stabilizing pressure force on the flapper at its natural frequency. The inertia tub... | 06/29/2004 |
| 6648014 | Fluid control valve and plate with filter A hydraulic control valve has a valve block provided with a plurality of ports, a valve body formed with ports corresponding to the ports of the valve block, and a plate disposed between the valve block and the valve body. The plate has a flow passage for... | 11/18/2003 |
| 6367250 | Shape memory alloy actuator The present invention discloses and teaches a unique, remote optically controlled micro actuator particularly suitable for aerospace vehicle applications wherein hot gas, or in the alternative optical energy, is employed as the medium by which shape memor... | 04/09/2002 |
| 6273135 | Fuel flow control apparatus A high pressure fuel system includes tapped high pressure flows (22,24) with restrictors (44,46) to provide low pressure flows with which, via a valve (50) to enable either a low pressure flow to bias a main, high pressure fuel cut off valve (16) to close... | 08/14/2001 |
| 6227247 | Position driven hot gas proportional thruster valve A thruster valve has a continuously positionable piston between a closed position and a maximum open position. The piston moves in response to the difference in pressure between the pressure in the intermediate annulus and the pressure behind the piston. ... | 05/08/2001 |
| 6151897 | Shape memory alloy actuator The present invention discloses and teaches a unique, remote optically controlled micro actuator particularly suitable for aerospace vehicle applications wherein hot gas, or in the alternative optical energy, is employed as the medium by which shape memor... | 11/28/2000 |
| 5845667 | Single stage variable force solenoid pressure regulating valve A pressure regulating variable force solenoid fluid control valve for regulating the pressure of a pressurized fluid in a fluid control system in proportion to the current level of an electrical input signal comprises a supply port for receiving pressuriz... | 12/08/1998 |
| 5709245 | Optically controlled actuator Fiber optics and photovoltaic devices for optically controlling a conventional Electro-Hydraulic Valve (EHV) without need for external wiring. One laser, one fiber and one photocell located at the EHV are electrically passive, and inherently reliable. The... | 01/20/1998 |
| 5697401 | Hydraulic servovalve A hydraulic servovalve controls the direction of flow of a working fluid and a flow rate of a working fluid between a plurality of ports. The hydraulic servovalve includes a spool axially movably disposed in a valve body for changing a direction of a work... | 12/16/1997 |
| 5533551 | Pressure regulating servovalve It comprises a distributor body having an output port, a feed port and a return port, and a slider adapted to slide inside the distributor body between a first position isolating the output port from the feed and return ports, a second position connecting... | 07/09/1996 |
| 5244002 | Spool position indicator An electro hydraulic servo valve has a pair of oppositely polarized magnets mounted in the surface of the spool of the valve to be controlled. A Hall effect sensor is mounted in the housing adjacent the magnets to precisely measure the position of the spo... | 09/14/1993 |
| 5240041 | Synthesized flow-control servovalve An improved two-stage servovalve (70) has a pilot-stage and an output-stage. A torque motor (16) produces pivotal movement of a flapper (18) in response to a supplied electrical current. The pilot-stage produces a flow which is used to selectively displac... | 08/31/1993 |
| 5197516 | Hydraulic servo valve with controlled disengagement feature A hydraulic servo valve arangement of the type having a hydraulic amplifier followed by a spool type servo valve second stage, includes a deceleration control mechanism. A spindle-type positioner has first and second positions which respectively permit an... | 03/30/1993 |
| 5186213 | 29 An improved hydraulic servo-valve including a spool (10, 10R, 10L) adapted to slidably move in a valve body (1) to change the direction of flow of a working liquid and vary a flow rate of the working liquid, nozzle back-pressure chambers (18, 18R, 18L) to... | 02/16/1993 |
| 5165448 | Two-stage servovalve with compensatoin circuit to accommodate "dead zone" d u A two-stage flow-control electrohydraulic servovalve has a pilot-stage (14) and a second-stage valve spool (6) mounted for sliding movement relative to a body (1). The pilot-stage (14) is arranged to provide an output pressure, which is used to selectivel... | 11/24/1992 |
| 5102161 | Semi-active suspension system with energy saving valve A suspension system for a vehicle comprises at least one adjustable wheel corner, each adjustable corner including a linear actuator operatively connected between a sprung mass and an unsprung mass of the vehicle. The linear actuator is actively movable i... | 04/07/1992 |
| 5035254 | Power transmission An electrohydraulic servovalve comprising a torque motor which receives an electrical signal and positions a flapper between a pair of opposed nozzles to control a spool valve and a feedback spring connected to the flapper and to the spool of the spool va... | 07/30/1991 |
| 5027858 | Multistage servovalves Two and three stage servovalves having a first stage comprising a torque-motor driven, double jet, flapper valve, extend the present art in dynamic response through the replacement of the present flapper valve inlet orifices with active flow controllers. ... | 07/02/1991 |
| 5027856 | Electrohydraulic signal converter An electrohydraulic signal converter includes an armature which is movable in a magnetic field generated by field coils and is located between two inlet channel orifices that are provided with restrictors. Drain channels are connected downstream from the ... | 07/02/1991 |
| 4997002 | Power transmission An electrohydraulic servovalve comprising a torque motor which receives an electrical signal and position a flapper of a spring tube and flapper subassembly between a pair of opposed nozzles to control a spool valve and includes a feedback spring connecte... | 03/05/1991 |
| 4938249 | Chip tolerant flapper A reverse-flow fluid control system utilizes a pair of rivet-shaped flappers mounted on a motor driven lever to apportion fluid between a pair of nozzles. Each flapper is slideably mounted upon the lever to allow the lever to move relative to and independ... | 07/03/1990 |
| 4922964 | Servovalve construction A hydraulic servovalve including a torque motor and a valve housing containing a fluid inlet conduit in communication with a spool chamber, a spool within the spool chamber, a filter chamber within the spool, a filter within the filter chamber dividing th... | 05/08/1990 |
| 4922963 | Hydraulic servovalve A hydraulic servovalve including a valve body, a spool bore in the valve body, a spool in the spool bore, inlet and outlet conduits in the valve body, control conduits in the valve body, annular grooves on the spool for providing fluid flow paths between ... | 05/08/1990 |
| 4907615 | High frequency response servovalve with electrical position feedback element structure and method Electrohydraulic servovalve structure and method. The servovalve structure has minimum oil passage length and oil volume and a high response force motor with a light weight armature and a stiff flexible tube and includes a second stage pilot valve having ... | 03/13/1990 |
| 4883091 | Multi-port self-regulating proportional pressure control valve A multi-port, self-regulating, proportional control valve preferably uses a load output feedback system to produce working fluid load output pressures that are proportional to pilot control fluid pressures. In some embodiments, the control valve is progra... | 11/28/1989 |
| 4761575 | Servo-valve and a control motor therefor A control motor for a servo-valve. Adjacent to the control coil of the control motor a dampening coil is located and short-circuited, so as to provide for an improvement of the frequency characteristic of the control motor.... | 08/02/1988 |
| 4705059 | Electrofluidic transducer of the nozzle/plate type and hydraulic servo-valve equipped with such a transducer The transducer comprises a piezoelectric double-layer plate, the movements of which, under the effect of electrical signals, directly control the flow from one or two spray nozzles. The plate is mounted in a floating manner, without any fastening, between... | 11/10/1987 |
| 4682063 | Control motor for a servo valve A control motor for a servo valve which includes pole screws defining an armature space, first and second spools or coils supported by the pole screws, respectively, a soft metal armature which is resiliently mounted to a thin walled tube and a samarium c... | 07/21/1987 |
| 4624284 | Servovalve A servovalve includes a flow-control valve connectable between a source of fluid pressure and a load and having a spool displaceable between an open position permitting fluid flow between the load and the source and a closed position axially offset theref... | 11/25/1986 |
| 4623003 | Hydraulically actuated spool valve A reduced drive area hydraulically actuated spool valve is protected against cavitation and provided with enhanced lubrication by connecting the variable volume inside the valve housing adjacent the non drive area of the spool end to the source of pressur... | 11/18/1986 |
| 4617966 | Electromagnetic positioner for a servovalve or the like An electromagnetic positioner for positioning the drive arm of a servovalve or the like, comprising an armature extending between laterally spaced pairs of vertically disposed and vertically spaced coils for pivotal movement in a plane which includes the ... | 10/21/1986 |
| 4609012 | Servo valve A housing has an inner area defined by end walls, side walls, a top wall, and a bottom wall having a flat inner surface. Inlet and outlet ports open through the flat inner surface. The inlet port is arranged to be connected to a supply source of pneumatic... | 09/02/1986 |
