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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 6012484 | Valve assembly A valve assembly includes a base (10), a handle (18) and a spindle (14) connected to the handle (18) at one end and adapted at the opposite end for opening and closing the valve. The spindle (14) extends from the base (10) to the handle (18) and is adapte... | 01/11/2000 |
| 6006783 | Magnetically actuatable valve The invention deals with a magnetically actuatable valve, in particular a hydraulic valve, with a piston guided inside of a body for establishing at least one flow-through connection, with the piston being effectively connected with two electromagnets wit... | 12/28/1999 |
| 5996620 | Liquid dispenser and control system A liquid dispenser and control system includes a base member having an intake cavity with an axis for orientation in an upward direction, the intake cavity being sealingly mateable with a mouth opening of a replaceable liquid container which, when mated w... | 12/07/1999 |
| 5975131 | Tank valve and opening sensor A device for providing remote indication of the opening of a weighted pallet type tank vent in which a permanent magnet is attached to the end of the pallet guide shaft distal to the pallet. A magnetic induction sensor is secured to the outside of the sha... | 11/02/1999 |
| 5941278 | Check valve A check valve for use in a GDCS of a nuclear reactor and having a motor driven disk including a rotatable armature for rotating the check valve disk over its entire range of motion is described. In one embodiment, the check valve includes a valve body hav... | 08/24/1999 |
| 5942892 | Method and apparatus for sensing armature position in direct current solenoid actuators An apparatus detects a position of an armature within a solenoid coil by superimposing a fixed frequency sensing signal onto the coil driver signal. The combined signal is applied to the solenoid coil and an alternating current component varies with chang... | 08/24/1999 |
| 5937897 | Hydraulic motion control valve and lever The present invention provides a hydraulic motion control or pilot valve and lever assembly for controlling the transmission and steering of a work vehicle such as a crawler tractor, articulated wheel loader or like construction vehicle. The motion contro... | 08/17/1999 |
| 5931177 | Valves This application discloses apparatus for logging the operation of a valve (10) of the type having a spindle (16) rotatable by a key (20) to effect opening and closing thereof, the apparatus including operative means (36) which are in use carried on a key ... | 08/03/1999 |
| 5906222 | Apparatus for detecting position of piston in hydraulic actuator coupled to gate valve A hydraulic actuator for a gate valve incorporates an eddy current proximity sensor to detect a displaceable stem cap made of ferromagnetic material. The stem cap is mounted on one end of an actuating stem. The other end of the stem is coupled to a plunge... | 05/25/1999 |
| 5899226 | Hydraulic directional valve for servocontrols of aircraft in particular helicopters This directional valve comprises a closing element (1) rotatively mounted in a fixed sleeve (5) disposed in a body (2) with interposition of an annular element (4) between the closing element and the sleeve. Means are provided for locking the annular elem... | 05/04/1999 |
| 5889405 | Method of detecting fault in electromagnetically-actuated intake or exhaust valve A method of detecting a fault of an electromagnetically-actuated intake/exhaust valve is disclosed. A valve body is supported in neutral position by the energizing force of an elastic member, and the electromagnetic force generated by supplying a current ... | 03/30/1999 |
| 5878779 | Actuator housing An EGR valve useful for metering exhaust gas to the intake of an internal combustion engine is disclosed. The EGR valve includes a base member through which exhaust gas passes and in which is disposed a valve member. An actuator housing is constructed wit... | 03/09/1999 |
| 5856743 | Position-determining apparatus An apparatus is provided for determining the position of a shaft that is rotatably displaceable about a longitudinal axis. The apparatus includes a magnet, first and second magnet-detecting devices that are arranged adjacent the shaft, and a third magnet-... | 01/05/1999 |
| 5826613 | Flow control valve A valve which allows for two-directional flow comprises a housing defining an axial flow channel; a flow control body disposed within the axial flow channel, the flow control body having a recess for receiving flow impact surfaces which allow for two dire... | 10/27/1998 |
| 5826616 | Valve spool position detector apparatus A shiftable valve spool has a plurality of distinct targets carried thereon. The targets are preferably axially spaced and located at one end of the valve spool. A detector mounted in the valve detects each target as each target enters a detection field o... | 10/27/1998 |
| 5819783 | Modular 3-way valve with manual override, lockout, and internal sensors An apparatus selectively supplies a source of pressurized fluid to a load device and selectively exhausts pressurized fluid from the load device. The apparatus includes a first housing for defining a longitudinally extending aperture communicating through... | 10/13/1998 |
| 5787915 | Servo positioning system A valve positioning system according to the present invention includes a force motor which responds to a command signal corresponding to a desired valve flow rate by energizing magnetic coils with a current to produce a flux force which moves the valve. P... | 08/04/1998 |
| 5785087 | Water hydraulic proportional control valve A water hydraulic proportional control valve comprising: a valve body having a supply port, a control port and a return port; a spool axially movably disposed in the valve body for changing a direction of the working fluid and a flow rate of the working f... | 07/28/1998 |
| 5781116 | Catalyst flow alarm A flow alarm includes a magnetic switch that is maintained open so long as catalyst flow is maintained and an air flow switch that is closed responsive to flow of air through an associated conduit. The associated conduit supplies air via a solenoid valve ... | 07/14/1998 |
| 5775355 | Method for measuring the lift of a valve needle of a valve and for adjusting the volume of media flow of the valve In a method for measuring lift of a valve needle and for adjusting the volume media flow of a valve, easily focused, high-energy radiation is used, which permits a contact-free measuring operation. The high-energy radiation is directed at the valve-closur... | 07/07/1998 |
| 5771926 | Double seat value with switch monitoring design A switch mounting arrangement enables close monitoring of seat position in a single-axis double-seat valve. The switch mounting arrangement includes a switch element disposed within a longitudinal bore of a mounting block. The bore also houses a transduce... | 06/30/1998 |
| 5762098 | Fluid mixing device, particularly for industrial inks or paints An automatic fluid mixing device wherein a cylindrical supporting structure supports a first number of valves angularly spaced along a first circumference, and a second number of valves angularly spaced along a second circumference concentric with and ins... | 06/09/1998 |
| 5738071 | Apparatus and method for sensing movement of fuel injector valve An apparatus and methods are provided for sensing movement of a fuel injector valve of a fuel injection system. The apparatus preferably includes a fuel pump for pumping fuel to flow to a combustion chamber of an engine and a first valve positioned in flu... | 04/14/1998 |
| 5730861 | Swimming pool control system A swimming pool control system automatically controls the daily maintenance functions of a swimming pool. The control system actively monitors system conditions, makes adjustments for abnormal conditions, and provides remote feedback of system problems du... | 03/24/1998 |
| 5730170 | Emergency gas or fuel shut-off device An emergency fuel shutoff device for interrupting the flow of gas or other fuel to a burner in the event of a malfunction or fire. The device uses a normally closed spring loaded fuel valve which is held open by tension along a cable. The cable has severa... | 03/24/1998 |
| 5727591 | Electromagnetic rotary indexing valve A rotary indexing valve has an electromagnetic coil which shuttles a spoil axially. As the spool shuttles axially, it cams on axially opposed surfaces so as to rotatably index the spool. Such rotatable indexing of the spool angularly positions different s... | 03/17/1998 |
| 5706855 | Device for monitoring the valve stroke of a diaphragm valve In a device for monitoring the valve stroke of a valve that is pneumatically or hydraulically driven and comprises a valve body that is actuated by means of a pressure spindle (16), in particular, a diaphragm valve, a control spindle (20) is effectively c... | 01/13/1998 |
| 5704392 | Apparatus for cycling motor-operated valves The present invention is an apparatus for cycling a valve having a valve operator for rotationally operating the valve. The apparatus includes a rotary actuator having an output shaft for developing a rotational force and a torque-sensing release clutch f... | 01/06/1998 |
| 5704586 | Apparatus for controlling a valve Known position indicators for magnetic valves are switches which may be activated by cams on the moving parts. Following installation an individual adjustment has to be performed in order to obtain a precise acknowledgment. This disadvantage is avoided an... | 01/06/1998 |
| 5699830 | Solenoid valve controller The present invention provides a solenoid valve controller with simple arrangement, by which it is possible to easily check connecting conditions and operating conditions of solenoid valves. Between a plurality of solenoid valves 11 intensively installed ... | 12/23/1997 |
| 5694117 | Alarm system for rising stem valves An alarm system for a particular type of lifting seal type valve, such as those employed in pressure relief. The alarm system consists of a signal source, an alarm mechanism and a signal carrying conductor secured to a seated lifting seal valve in such a ... | 12/02/1997 |
| 5685697 | Combined check valve and pressure sensor A check valve, for use in a vacuum accumulator. The check valve includes a movable gate, which blocks fluid flow. The gate carries a first electrical contact, which mates with a second electrical contact, when the gate closes, thereby issuing a signal whi... | 11/11/1997 |
| 5685336 | Device for monitoring the valve lift of a diaphragm valve Device for monitoring the valve lift of a pneumatically or hydraulically driven valve, the valve body of which is actuated by a pressure spindle (16), specificelly a diaphragm valve where a drive spindle (20) and pressure spindle (16) are effectively conn... | 11/11/1997 |
| 5680878 | Control valve response measurement device A method and apparatus employs a measurement device placed on an automatic control valve to test the speed of response of the control valve and any lost motion created by or within any mechanical linkage or connection used to automatically actuate the val... | 10/28/1997 |
| 5669413 | Control valve having an actuating drive and method therefor A valve apparatus for controlling a pressured fluid, in which the shut-off device is force closed by the pressured fluid which is admitted into a chamber via a throttle bore. The valve is opened via a drive means, which acts directly on both a pilot valve... | 09/23/1997 |
| 5647396 | Modular valve position indicator A modular valve position indicator which interfaces with a valve, actuator and other auxiliary equipment meeting NAMUR standards is described. The position of the valve within the flow circuit is indicated by at least one of an LED display and color coded... | 07/15/1997 |
| 5630440 | Piezo composite sheet actuated valve A piezo-electrically actuated hydraulic valve has a nozzle type seat and a piezo-electric actuator in a plane orthogonal to the axis of the nozzle. The actuator includes a piezo-ceramic layer laminated to an electrode sheet, so that the composite is in sh... | 05/20/1997 |
| 5626165 | Valve for re-circulating exhaust gas When an armature is displaced by application of a voltage to an electromagnetic coil, a second elastic member contracts in opposition to the restorative force of the second elastic member, wherein a washer, the second elastic member, and the armature are ... | 05/06/1997 |
| 5623963 | Modular valve position indicator A modular valve position indicator which interfaces with a valve, actuator and other auxiliary equipment meeting NAMUR standards is described. The position of the valve within the flow circuit is indicated by at least one of an LED display and color coded... | 04/29/1997 |
| 5620024 | Relief valve operation detector An operation member (51) is fixedly secured to a right portion of a relief member (29) inserted into a housing (20). An annular transmission member (52) externally fitted to the operation member (51) is supported by a guide groove (62) so as to be vertica... | 04/15/1997 |
