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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 7753078 | Hybrid hydraulic joystick with an integral pressure sensor and an outlet port A user input device is provided for a hydraulic system that has a source of pressurized fluid and a tank. The user input device includes a body with a supply passage for receiving the pressurized fluid, a tank passage for connection to the tank, and a first chamber.... | 07/13/2010 |
| 7753077 | Hybrid hydraulic joystick for electrically operating valves A user input device is provided for a hydraulic system that has a source of pressurized fluid and a tank. The user input device includes a body with a supply passage for receiving the pressurized fluid, a tank passage for connection to the tank, and a first chamber.... | 07/13/2010 |
| 7451685 | Hydraulic control system with cross function regeneration A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from one cylinder chamber is routed into the other cylinder chamber, and cro... | 11/18/2008 |
| 7434392 | Configurable hydraulic system for agricultural tractor and implement combination When different implements are attached to an agricultural tractor, various hydraulic actuators on the implement are operated by connection to the hydraulic system on the tractor. A single hydraulic fluid connector on the tractor has first and second ports with a sep... | 10/14/2008 |
| 7422033 | Position feedback pilot valve actuator for a spool control valve A spool type control valve is operated by an electrically driven pilot valve. A pilot piston is attached to the control spool. As an electrical actuator moves the pilot spool, a greater pressure is applied to one side of the pilot piston than the other side, which c... | 09/09/2008 |
| 7415989 | Spool activated lock-out valve for a hydraulic actuator load check valve A check valve system controls the flow of fluid between a spool valve and a hydraulic actuator and includes a pilot operated check valve that is controlled by a lock-out valve. The check valve has a poppet that engages and disengages a first valve seat in response t... | 08/26/2008 |
| 7409825 | Hydraulic system with a cylinder isolation valve A hydraulic system provides failure protection by incorporating an isolator adjacent a hydraulic actuator. The isolator has a first port connected to the hydraulic actuator and a second port with an electrically operated isolation valve connected between those ports... | 08/12/2008 |
| 7406982 | Hydraulic system control method using a differential pressure compensated flow coefficient A hydraulic system has an electrohydraulic valve that controls flow of fluid to operate a hydraulic actuator, such as a cylinder or motor. A set of characterization data is provided which describes performance of the electrohydraulic valve as a function of changes i... | 08/05/2008 |
| 7387061 | Control apparatus for hydraulic cylinder Cushion chambers (8) disposed in the vicinity of both ends of a hydraulic cylinder (1) to throttle inflow or outflow of an operating oil caused by a piston (5) moving close to a piston stroke end, pressure sensors (16, 17) to detect press... | 06/17/2008 |
| 7380398 | Hydraulic metering mode transitioning technique for a velocity based control system The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time for energy conservation. The metering mode to use is selected in response to the hydraulic load acting on the hydraulic a... | 06/03/2008 |
| 7377480 | Electrohydraulic valve servomechanism with adaptive resistance estimator A servomechanism includes a controller which dynamically estimates the resistance of the solenoid coil in an electrohydraulic valve as part of determining a level of electric voltage to apply to open the valve. The servomechanism receives a current setpoint designat... | 05/27/2008 |
| 7377523 | Hydraulic suspension with a lock-out mechanism for an off-highway vehicle A vehicle has an axle connected to a frame by at least one hydraulic cylinder with two chambers separated by a piston. A hydraulic circuit controls flow of fluid between two cylinder chambers and between the chambers and an accumulator to dampen motion of the frame ... | 05/27/2008 |
| 7373869 | Hydraulic system with mechanism for relieving pressure trapped in an actuator Pressure trapped in an inactive hydraulic actuator can result in the actuator moving in a direction which is opposite to that desired upon subsequent activation. The present method detects a trapped pressure condition and takes remedial action before activating the ... | 05/20/2008 |
| 7341236 | Pilot operated valve with a pressure balanced poppet A pilot operated valve has a main poppet that selectively controls flow of fluid between first and second ports in response to pressure in a control chamber on one side of the main poppet. The main poppet has an aperture extending between the control chamber and the... | 03/11/2008 |
| 7296404 | Apparatus for controlling deceleration of hydraulically powered equipment A machine member driven by a hydraulic actuator may oscillate, or wag, when the hydraulic actuator decelerates or stops. The degree of oscillation is a function of the machine member's ability to track a deceleration command, which ability varies with changes in the... | 11/20/2007 |
| 7270046 | Integrated valve assembly and computer controller for a distributed hydraulic control system A distributed hydraulic system locates a control assembly, that has electrohydraulic valves and a electronic controller, adjacent the respective hydraulically powered actuator controlled by that assembly. The control assembly includes a manifold block with ports to ... | 09/18/2007 |
| 7234386 | Three chamber hydraulic cylinder for an active vehicle suspension with integrated load leveling A hydraulic actuator for an active of semi-active vehicle suspension system has a cylinder with a piston therein. A piston rod is attached to the piston and extends out of the cylinder. First and second chambers are formed on opposites sides of the piston enabling t... | 06/26/2007 |
| 7222484 | Hydraulic system with multiple pressure relief levels A hydraulic system has at least one primary hydraulic functions and a plurality of secondary hydraulic functions all of which are connected in parallel to a supply conduit and a return conduit. A first pressure relief valve prevents pressure in the supply conduit fr... | 05/29/2007 |
| D542307 | Hydraulic valve manifold block | 05/08/2007 |
| 7210291 | Priority communication protocol for a distributed electrohydraulic system having multiple controllers A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controller... | 05/01/2007 |
| D540347 | Electronic controller and hydraulic valve block assembly | 04/10/2007 |
| 7194855 | Communication protocol for a distributed electrohydraulic system having multiple controllers A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controller... | 03/27/2007 |
| 6964281 | Multiple hydraulic spool valve assembly with a monolithic body An assembly of a plurality of hydraulic control valves is housed in a single-piece body. For each control valve, a spool bore and an aperture for a pressure compensation valve are provided in the monolithic body. Each spool bore is connected to several return passag... | 11/15/2005 |
| 5109699 | Sonic casting tester A method and apparatus for detecting a blockage in a cored passage of a hydraulic valve casting includes a sound generating device disposed within the spool bore and communicating with the passageway so that a sound wave may be introduced into the passage... | 05/05/1992 |
| 4597410 | Cross line relief valve mechanism A cross line relief valve mechanism includes a pair of opposed relief valves contained in a bore connecting the service passages of a control valve. A high pressure condition in one of the service passages acts directly on the main poppet of one of the re... | 07/01/1986 |
