Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 6932113 | Pilot device What is disclosed is a pilot apparatus whereby at least two mechanically operable control valves and two electrically or electro-hydraulically operable control valves may be driven. The pilot apparatus comprises a pivoted lever having two handles, on each of which a... | 08/23/2005 |
| 6863507 | Generic free-piston engine with transformer valve assembly for reducing throttling losses A free-piston engine directed to reduced throttling losses at minimum expenditure is provided. The free-piston engine has an engine piston, and a hydraulic piston co-operating with the engine piston. The engine piston may receive application of a force in the direct... | 03/08/2005 |
| 6499296 | Hydraulic circuit A hydraulic circuit for controlling a consumer of a mobile work tool, wherein the pressure in supply and outlet lines towards the consumer is limited by means of pilot-controlled pressure control valves. The pilot control stage of these pressure control v... | 12/31/2002 |
| 6499295 | Hydro-transformer The present invention relates to a hydro-transformer including a hydraulic machine, a switching valve and a control means. A work port of the switching valve, which may optionally be connected hydraulically with a pressure port of the switching valve or a... | 12/31/2002 |
| 6494127 | Radial piston engine with guide rollers The invention concerns a technically optimized radial piston engine comprising a cam ring and a cylinder block arranged so as to rotate about an axis of rotation relative to the cam ring and having a plurality of cylinders oriented in the radial direction... | 12/17/2002 |
| 6439364 | Inching braking system There is disclosed an inching braking system wherein a brake piston of a brake valve assembly initiates an actuation movement of the brake piston by way of an actuator only after a predetermined stroke of a driving member for an inching piston.... | 08/27/2002 |
| 6367365 | Hydraulic circuit An LUDV-circuit for controlling at least one of a lower-load consumer and a higher-load consumer is disclosed, wherein a metering orifice and a downstream pressure compensator for maintaining constant the pressure drop across the metering orifice constant... | 04/09/2002 |
| 6223773 | Check valve assembly In a check valve assembly and a valve assembly employing such a check valve assembly, a topping piston may be taken into contact with a main poppet to raise the main poppet from its seat. The main poppet is designed without significant area difference fro... | 05/01/2001 |
| 6199585 | Directional-control valve A directional control valve has an axially displaceable control piston inside a valve housing and a travel sensor arranged on the valve housing to detect the position of the control piston. The sensor includes a travel sensor tube which is pressure tight ... | 03/13/2001 |
| 6196247 | Valve assembly and method for actuation of such a valve assembly A valve assembly for actuation of a user and a method for actuation of the valve assembly, wherein a supply throttle device and a drain throttle device may be actuated independent of each other, is disclosed. In the case of single-action users, the drain ... | 03/06/2001 |
| 6192928 | Valve assembly A valve assembly for pressure adapted and volumetric flow adapted supply of at least one user may be supplied with hydraulic fluid or connected to a tank via two work ports of a continuously adjustable directional control valve. To the two work ports of t... | 02/27/2001 |
| 6145307 | Method and device for controlling a hydraulic installation of a utility vehicle What is disclosed is a method for controlling a hydraulic cylinder acting against a load, and a hydraulic installation of a utility vehicle operating in accordance with this method, wherein the pressure in the supply line to the effective areas of the hyd... | 11/14/2000 |
| 6068021 | Directional control valve A 2-way fitted valve (2) includes a main piston (6) guided in a valve bush (4) and allowing flow of a hydraulic fluid therethrough, whereby an inlet port (B) is connected with an outlet port (A). In the region of a throttle point (8) of the main piston (6... | 05/30/2000 |
| 6047732 | Directional control valve A directional control valve has snap-locking device for retaining the slide of the directional control valve in at least one switching position. The snap-locking device has a snap-locking part with a snap-locking piston that allows an engagement part to e... | 04/11/2000 |
| 6038858 | Inching and braking system with interconnected brake and inching valves What is disclosed is an inching and braking system for a hydraulically powered apparatus with a brake system and a drive system, wherein the drive system and the brake system can be controlled in order to generate a braking effect by actuating the inching... | 03/21/2000 |
| 5996615 | Flow-control valve Disclosed is a 2-way flow control valve whereby a constant hydraulic fluid volume flow may be adjusted by serial arrangement of a restrictor orifice and a control orifice. In the case of a reverse flow through the flow control valve of the present inventi... | 12/07/1999 |
| 5979862 | Pilot-operated proportional pressure limiting valve A pilot-operated proportional pressure limiting valve with a pilot valve, with a main piston which can be acted on in closing direction by pressure prevailing in a control chamber and in opening direction by pressure prevailing in an inlet, with a control... | 11/09/1999 |
| 5975488 | Lifting magnet arrangement A lifting magnet arrangement. The arrangement has a thrust direction in which a pressure spring which biases the armature into its basic position may be set. This is done by an actuating section designed to project from the magnet housing. By using this c... | 11/02/1999 |
| 5857333 | Control system for hydraulic power units The present invention relates to a control system for hydraulic power units, in particular hydraulic cylinder-piston-assemblies comprising a valve to be controlled by an electronic controller, the valve controlling the fluid path between the power unit, a... | 01/12/1999 |
| 5852933 | Hydraulic drives system for a press The invention relates to a drive system for a hydraulic press. The drive system is of the type of secondary controlled system maintaining an impressed pressure of substantially constant magnitude in a pressure system. A hydraulic transformer comprises a p... | 12/29/1998 |
| 5832807 | Hydraulic control for a dividing machine tool A hydraulic control for a dividing machine tool, in particular a shear or cutting press, in which a damping device is provided in order to counteract a sudden downward movement of the working piston upon the cutting through of a workpiece during an operat... | 11/10/1998 |
| 5829335 | Control for hydraulic drive or actuator A control for a hydraulic drive or actuator is provided, wherein the actuator has pressurized operating fluid applied thereto, and wherein the operating fluid is directed through an electrically controlled valve for establishing the amount of operating fl... | 11/03/1998 |
| 5725361 | Hydraulic unit A hydraulic unit having a hollow oil container which has a receiving space for oil between an external outer wall and an internal outer wall, and having a pump unit which comprises an electric motor and a pump which can be driven by the electric motor. Su... | 03/10/1998 |
| 5726877 | Method for the adaptive adjustment of the control parameters of an electro-hydraulic axis of motion The invention relates to a servo hydraulic force controlled system comprising a cylinder, a control valve and a controller as well as a load defining the controlled system. The optimum setting of the controller is automatically performed by using a fuzzy-... | 03/10/1998 |
| 5724223 | Control of a proportional valve using mains voltage A proportional valve has an output proportional to an electrical input signal. In a preferred embodiment, the valve is actuated by a proportional solenoid having a coil which is controlled by a control signal in proportion to voltage or current. The propo... | 03/03/1998 |
| 5720168 | Control device for a hydraulic pump A control system for a variable-displacement hydraulic pump having an adjustment device and being electrical current-adjustable as required for supplying pressure to a first hydraulic apparatus (13), and pressure-adjustable for supplying pressure to a sec... | 02/24/1998 |
| 5713331 | Injection and exhaust-brake system for an internal combustion engine having several cylinders An injection system for an internal combustion engine having a plurality of cylinders is known which has a hydraulic pump with a delivery outlet to which a delivery line common to the cylinders is connected, and a plurality of injection units each of whic... | 02/03/1998 |
| 5697336 | Engine brake for a multi-cylinder internal combustion engine The present invention proceeds from an engine brake for a multi-cylinder internal combustion engine with decompression valves actuatable by pressurization of hydraulic pistons outside of the exhaust stroke of the working piston of the internal combustion ... | 12/16/1997 |
| 5687816 | Underground storage space In an underground storage space, particularly for endangered goods, access is effected via a left the opening of which, leading into the storage space, can be closed by two covers which are arranged spaced apart from each other.... | 11/18/1997 |
| 5676109 | Hydraulic system, in particular an engine brake for an internal combustion engine The invention is based on a hydraulic system, in particular of an engine brake for an internal combustion engine, having at least one hydraulic actuating element, a positive displacement pump by which pressurized fluid can be pumped from a low-pressure re... | 10/14/1997 |
| 5640892 | Hydraulic control device A hydraulic control device having a directional valve by means of which the direction of movement and the speed of a hydraulic consumer, especially a mobile working device can be modified. The hydraulic control device has a hydraulic pre-control device by... | 06/24/1997 |
| 5638678 | Hydraulic drive system A hydraulic drive system includes a first driven hydrostatic machine adjustable in volume and operating as a pump supplying fluid to a supply line for maintaining an impressed pressure therein, a second hydrostatic machine which is adjustable in volume an... | 06/17/1997 |
| 5628188 | Torque control of hydrostatic machines via the pivot angle or the eccentricity of said machines A circuit arrangement for controlling the output torque of a hydrostatic machine connected to a hydraulic system having an impressed operating pressure. The circuit arrangement has a control element for changing the output torque of the machine based upon... | 05/13/1997 |
| 5591015 | Constructional unit consisting of a hydraulic machine (hydraulic pump or hydraulic motor) and a support A constructional unit comprising a hydraulic machine having a drive or driven shaft and of a support by which the hydraulic machine is held with the interposition of material which deadens solid-conducted noise. Low noise emission of the hydraulic machine... | 01/07/1997 |
| 5558004 | Control arrangement for at least one hydraulic consumer A control arrangement for at least one hydraulic consumer in which the consumer can be controlled with respect to direction and speed via a directional control valve device, in which two consumer lines lead from the directional control valve device to the... | 09/24/1996 |
| 5528911 | Hydraulic control apparatus for a plurality of users The present invention provides for a control apparatus for independently operating at least two users. The users can be the tilt cylinders and the lift cylinders of a loader. The control apparatus provides for the adjustment of the control valves and for ... | 06/25/1996 |
| 5410946 | Hydraulic actuator A hydraulic actuator including a single cylinder body which defined therein a pressure chamber in which a first piston with a piston rod and a second piston with a piston rod are independently movably inserted, a first working member secured to the first ... | 05/02/1995 |
| 5341311 | Method and apparatus for limiting the capacity of a hydrostatic machine The present invention relates to a hydraulic secondary control system comprising a hydrostatic machine as a secondary unit which is connected to a pressure line in which an impressed pressure of approximately constant value is generated by a hydrostatic m... | 08/23/1994 |
| 5333450 | Apparatus for adjusting the working fluid pressure An apparatus for adjusting the pressure of working fluid provided to the load or user via a hydraulically actuatable control valve is provided. The apparatus includes a comparator that compares a given or desired control pressure for the control valve wit... | 08/02/1994 |
| 5332371 | Hydraulic system The present invention relates to a noise dampening assembly of a hydraulic machine and a drive motor, and provides for a structure comprising a block, in which the hydraulic machine is mounted by means of noise dampening elements.... | 07/26/1994 |
