Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 5396780 | Refrigeration system and method of controlling a refrigeration system A refrigeration system having a compressor, a condenser and an evaporator between the condenser and the compressor. A controllable valve unit at the input side of the evaporator has degrees of opening for controlling fluid flow through said evaporator. A ... | 03/14/1995 |
| 5337778 | Pressure control valve A pressure control valve of the type having pump, tank and load-sensing connections used in conjunction with one or more proportional type valves. In this type of system a load-sensing signal is tapped off from the output side of the proportional valves a... | 08/16/1994 |
| 5333507 | Pressure sensor and a method for the manufacture thereof A pressure sensor unit having a pressure chamber formed in a housing by a plate member having a diaphragm region. The plate is fastened to the housing via an adhesive which is disposed in a joint between an inner housing surface and an intermediate suppor... | 08/02/1994 |
| 5323687 | Hydraulic circuit A hydraulic circuit for a backhoe loader having two double-acting cylinders for the arm and bucket of the loader and respective directional valves for the cylinders. There are heavy demands on the oil pump of the system when the two cylinders are moved si... | 06/28/1994 |
| 5310160 | Electromagnetic valve top part An electromagnetic valve assembly having upper and lower modules. A standardized lower module can be joined with one of several upper modules having a different axial length for varying the magnetic field strength of a coil arrangement in the upper module... | 05/10/1994 |
| 5285867 | Steering arrangement The handwheel of a vehicle is connected to a handwheel shaft which in turn is connected through a load torque isolating device (overrunning clutch) that acts in either of the two directions of rotation and is connected to a steering shaft that controls a ... | 02/15/1994 |
| 5280873 | Plunger armature magnetic arrangement An electromagnetic valve assembly having a valve unit with a valve seat and a coil arrangement. An armature is slidably disposed in the bore of the coil arrangement. A yoke unit surrounding the coil arrangement is in two parts having cooperating longitudi... | 01/25/1994 |
| 5275251 | Full hydraulic steering system compensating for steering angle error A hydraulic steering system having apparatus for compensating for steering angle error. On displacement of a steering handwheel, the steering handwheel angle, the steering motor angle and the steering handwheel speed are ascertained. The fluid flow betwee... | 01/04/1994 |
| 5265841 | Plunger armature electromagnetic valve An electromagnetic valve assembly having a valve unit with a valve seat and a coil arrangement. An armature is slidably disposed in the bore of the coil arrangement and has one end cooperable with a core head to form an air gap and at the other end a clos... | 11/30/1993 |
| 5263321 | Control arrangement for a fully-hydraulic steering system The control arrangement may be used for vehicles or in other steering systems and includes a steering motor that is adjusted as a function of hand operated steering mechanism, the steering mechanism controlling a directional section and a metering motor s... | 11/23/1993 |
| 5257737 | Thermostatic expansion valve for refrigerating plants The valve has a valve seat disposed in the fluid flow path between the inlet and outlet and a closure member adjustable relative to the valve seat by an actuating device. A valve actuating shaft which is connected to the closure member includes an adjustm... | 11/02/1993 |
| 5257177 | Apparatus for controlling the movement of hydraulically movable work equipment and a path control arrangement Apparatus for controlling the movement of hydraulically movable work equipment that is arranged at the end of a length-adjustable and pivotable arm, along a substantially rectilinear path of movement, the work equipment being moved with the assistance of ... | 10/26/1993 |
| 5251716 | Two-loop steering system for motor vehicles The steering system of a motor vehicle includes a steering motor having the application of pressurized fluid applied thereto by a main loop and in the event of a fault in the main loop by an auxiliary loop with the main loop isolated from the auxiliary lo... | 10/12/1993 |
| 5214930 | Method for regulating the temperature of a medium by means of a temperature control loop, and a temperature-regulating device for implementing the method Method and apparatus for controlling a prior art refrigeration system of the type having an evaporator, a variable capacity compressor arrangement, and switching apparatus between a control unit and the compressor arrangement. The compressor arrangement t... | 06/01/1993 |
| 5215158 | Hydraulic steering system for vehicles The steering system of a motor vehicle includes a two chamber steering motor having the application of pressurized fluid applied thereto through change over valves in one position by the way of a by pass valve and alternately in a second position by the w... | 06/01/1993 |
| 5215453 | Gear wheel assembly for hydraulic purposes, and method assembling the same A gear wheel assembly of the type having an externally toothed gear wheel and an internally toothed ring wheel with the gear wheel having one less tooth than the ring wheel and the wheels having eccentrically spaced axes with said gear wheel being rotatab... | 06/01/1993 |
| 5204566 | Electrical machine The apparatus includes a laminated core that has frontal end faces and slots with a winding extending in the slots. An electrical insulating end plate is provided adjacent at each frontal end face and adjacent to the winding heads of the winding. At least... | 04/20/1993 |
| 5165652 | Electromagnetic valve having a throttle path connected to a damping chamber The coil arrangement of an electromagnetic valve has a stationary core that is provided with a stop face for having one end of an armature abut thereagainst. The stop face and the one end of the armature is located in a damping chamber, the other end of t... | 11/24/1992 |
| 5165320 | Fluid-controlled servo-arrangement Disclosed is an arrangement that includes a piston cylinder unit having pressure chamber in which fluid acts in opposition to a spring piston combination, a pressure generator and a fluid conduit extending between a tank and the tank. A first and a second... | 11/24/1992 |
| 5165496 | Fully hydraulic steering arrangement for vehicles A control valve is opened (moved from its neutral position) by rotation of a steering wheel to conduct fluid from a pump to a steering meter device that controls the amount of fluid fed to a steering motor arrangement. When the steering motor piston has b... | 11/24/1992 |
| 5165447 | Fully-hydraulic steering unit In a hydraulic power steering control unit of the type having an inner steering wheel operated control member which has limited relative rotation movement with respect to outer control member which controls a conventional steering motor, passages are prov... | 11/24/1992 |
| 5161013 | Data projection system with compensation for nonplanar screen A data projection system in which a data projector having a data display memory associated therewith projects images to a viewing screen. The system includes a curved or nonplanar viewing screen and computer software effective to provide viewing fidelity ... | 11/03/1992 |
| 5131237 | Control arrangement for a refrigeration apparatus A refrigeration system having compressor controls responsive to the heat load on the system. Each selected evaporator of the system has a thermostatic switch unit which includes an associated temperature sensor in proximity to the evaporator. The thermost... | 07/21/1992 |
| 5093771 | Inverter circuit and a method for controlling same An inverter circuit which converts d.c. from a d.c. source to single or multiple phase a.c.. Two semiconductor switching elements for each phase are connected in series between two poles of a d.c. source. A signal generator provides a pulse width modulate... | 03/03/1992 |
| 5045963 | Protective circuit for the induction coil of a magnetically inductive flow meter The invention relates to a protective circuit for the induction coil of a magnetically inductive type flow meter. If the leads of a flow meter used in an explosive environment are cut there can occur a high voltage and resulting sparking which could cause... | 09/03/1991 |
| 4987546 | Method and circuit for controlling the speed of an object moveable by a drive A method for controlling the speed of an object which is moveable by a drive and is intended to have reached a predetermined speed after the occurrence of a release signal at a predetermined location. Also a circuit for performing this method including a ... | 01/22/1991 |
| 4972722 | Magnetic inductive flow meter The invention relates to a magnetically inductive flow meter which generates a combined signal made up of a coil generated alternating voltage and an alternating simulated voltage. An evaluating circuit processes the combined signal to determine a flow ra... | 11/27/1990 |
| 4940106 | Articulated vehicle with hydraulic steering A double acting hydraulic shock absorber is connected across first and second fluid conduits that are connected to opposite ends of hydraulic steering motors of an articulated vehicle and to a control unit that is controlled by a steering wheel to control... | 07/10/1990 |
| 4934156 | Evaporator pressure regulating valve controlled by an auxiliary force for a refrigerator installation In a refrigeration system there is provided a main valve that has its inlet port fluidly connected to an evaporator while its outlet port is fluidly connected to the suction port of a motor-compressor. The closing of the main valve is controlled by an aux... | 06/19/1990 |
| 4858515 | Priority valve for hydraulic installations The invention relates to a priority valve for a hydraulic installation having a main circuit and an auxiliary circuit. The priority valve has a slide member which primarily has a controlled throttle for dividing the supply fluid between the main and auxil... | 08/22/1989 |
| 4845956 | Regulating device for the superheat temperature of the evaporator of a refrigeration or heat pump installation The invention relates to a device and method for regulating the superheat temperature of the evaporator of a refrigeration or heat pump system. The existing and desired superheat values are compared at intervals of two and the rate of departure between th... | 07/11/1989 |
| 4827800 | Multi-groove and spline connection between gear shaft of a rotary piston machine with internal axis and method of making such a multigroove spline connection The invention relates to a multi-groove and spline connection between a gear and cardan shaft of a rotary piston machine with an internal axis, wherein external toothing at the head of the cardan shaft engages internal toothing of the gear and an axial ab... | 05/09/1989 |
| 4811189 | AC rectifier circuit with means for limiting the rectified voltage The invention relates to an AC voltage supplied rectifier circuit with a downstream smoothing capacitor. A prior art problem with this type of circuit was that the inductive impedance of the supply voltage caused a practically umdamped oscillation between... | 03/07/1989 |
| 4774807 | Control apparatus for hydrostatic motor vehicle steering apparatus The invention relates to hydrostatic steering control apparatus of the type having a hydrostatic steering motor which is connected to wheels to be steered and a steering wheel controlled metering or quantity setting device for controlling the hydraulic fl... | 10/04/1988 |
| 4771469 | Means and method of representing an object shape by hierarchical boundary decomposition Information on the shape of an object is extracted by generating an image of the object, encoding and ordering the boundary points of the image, selecting points on the outermost portions of the boundary, partitioning the boundary at the selected points i... | 09/13/1988 |
| 4760954 | Auxiliary equipment for the thermostatic valve of a radiator The invention relates to a heating system of the type in which a radiator in a room has the flow of a heated fluid thereto from a central source such as a boiler controlled by a thermostatic valve. The valve normally has a sensor associated therewith to w... | 08/02/1988 |
| 4760744 | Mass flow meter based on the coriolis principle A mass flow meter based on the Coriolis principle. The meter has two rectilinear measuring tubes juxtaposed in parallel and mechanically connected at adjacent ends thereof. An oscillation generator is connected to the tubes between the ends thereof for dr... | 08/02/1988 |
| 4760699 | Thermostatic servo-motor, particularly for valves The invention relates to a thermal servomotor which includes two operating elements which act oppositely on an actuating bridge. The operating elements are thermally insulated from each other and each has a temperature-dependent filling and a separate hea... | 08/02/1988 |
| 4759693 | Suction sound damper A suction sound damper for a slide piston refrigerant compressor that includes a suction nipple that is pushable into a groove of a cylinder cover of the compressor when the nipple is in a predetermined position, and is seatable in sockets formed in two s... | 07/26/1988 |
| 4759698 | Rotary compressor with oil conveying means to shaft bearings The invention relates to a rotary compressor assembly of the type in which an electric motor and a rotary compressor are mounted in a seal capsule and share a common drive shaft. An intermediate pressure chamber is formed in the housing adjacent the outbo... | 07/26/1988 |
