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 |
| 7430955 | Hydraulic arrangement A hydraulic arrangement is provided for a tool locking device of a loader. The hydraulic arrangement comprises a hydraulic cylinder with first and second chambers, which cylinder has a first position for unlocking and a second position for locking, a first supply li... | 10/07/2008 |
| 7353744 | Hydraulic control The invention concerns a hydraulic control (1) with a supply connection arrangement (7) having a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement having two working connections (A, B) connectable with a c... | 04/08/2008 |
| 7216578 | Hydraulic actuating device The invention relates to a hydraulic actuating device for a movable component of a vehicle, in particular a closure element for closing an opening in a vehicle body, such as for example a movable roof, such as a folding roof or a retractable hard top. The hydraulic ... | 05/15/2007 |
| 7213502 | Robustly stable servo-controlled metering poppet valve A poppet valve assembly with a control chamber that can be fluidly connected to a number of different hydraulic ports via a pilot valve assembly. The poppet valve assembly includes a poppet valve member whose movement is controlled by filling or draining the control... | 05/08/2007 |
| 7210740 | Reclining chair A reclining chair, in particular a passenger chair, for use in a vehicle such as an aircraft, bus or mobile home. The chair includes a base assembly, a seat frame located above the base assembly, a seat attached to the seat frame, and a seat back connected to the se... | 05/01/2007 |
| 7195197 | Techniques for controlling a fin with unlimited adjustment and no backlash A fin control assembly includes a housing, an arm configured to couple to a fin and to steer the fin relative to the housing, and a locking member disposed within the housing. The locking member is configured to (i) lock the arm in a substantially fixed state to inh... | 03/27/2007 |
| 7174826 | Hydraulic crowd control mechanism for a mining shovel A crowd control mechanism for a power shovel includes an extendible dipper handle having an extended position and a retracted position. A double acting hydraulic cylinder having a an extendible ram has one of the cylinder and the ram fixed to the dipper handle and t... | 02/13/2007 |
| 7125058 | Locking device with solenoid release pin A locking device with a solenoid release actuator includes a housing, a plunger axially slidable within the housing, a biasing member for biasing the plunger in a first direction, one or more locking balls, and the locking balls disposed in an aperture in the housin... | 10/24/2006 |
| 7124577 | Vehicular steering control device The present invention lowers energy loss while at the same time enhancing the responsiveness of a steering control system. When a steering controller is operated rapidly, the aperture area of a steering flow control valve 4 rapidly increases, and the differen... | 10/24/2006 |
| 7077148 | Redundant valve system The redundant valve system 10 of the preferred embodiments includes a first valve unit 12, a second valve unit 14, a third valve unit 16, a first diagnostic device 18, a second diagnostic device 20, and a control unit 22 | 07/18/2006 |
| 6786129 | Sensor for cylinder control, and cylinder device incorporating the same In the present invention, sensors for cylinder control are connected to a main cylinder which has an internal cylinder chamber which is partitioned by a piston into two chambers, and they detect the operational state of the piston. There are provided accumulators co... | 09/07/2004 |
| 6510688 | Safety device for a moving system A safety device for a moving system with a drive in which a pneumatically operated piston, by linear movement in a cylinder, moves a transported object past a stationary part in at least one direction has the aim of generating a switching signal at every ... | 01/28/2003 |
| 6094910 | Apparatus and method for raising and lowering a piston in a piston cylinder arrangement in a derrick Disclosed is an apparatus for a derrick, including hydraulic piston/cylinder arrangements for raising and lowering a yoke travelling on guide rails attached to the derrick. A hydraulic system having different modes of operation is provided for the operati... | 08/01/2000 |
| 5865088 | High-speed safety circuit for a hydraulic press A high speed safety circuit arrangement is provided for a hydraulic press which is driven by a hydraulic cylinder assembly constituted by a principal cylinder unit and a subsidiary cylinder unit. The circuit arrangement comprises a servo valve disposed in... | 02/02/1999 |
| 5832808 | Directional control valve unit A directional control valve unit includes a first actuator port connected to a raising side chamber of a working machine cylinder. In addition, a second actuator port is connected to a lowering side chamber of the working machine cylinder. A regeneration ... | 11/10/1998 |
| 5617771 | Auto cycle pump An auto cycle pump in accordance with the invention includes a housing having a reservoir for storing hydraulic fluid. A hydraulic pump in the housing provides hydraulic flow. A directional valve has neutral, advance and retract positions to respectively ... | 04/08/1997 |
| 5609088 | Hydraulic control system for excavations with an improved flow control valve A hydraulic control system for excavators includes a variable displacement pump for producing a variable volume of pressurized working fluid, a hydraulic swing motor rotatably driven by the working fluid and a flow control valve operable to control flow o... | 03/11/1997 |
| 5579676 | Hydraulic valve to maintain control in fluid-loss condition A hydraulic fluid-loss control valve for preventing uncontrolled load movement in the event of a fluid loss such as from the bursting of a hose and further for allowing an operator to move the load in a controlled way despite the fluid loss. The control v... | 12/03/1996 |
| 5571226 | Hydraulic device for construction machinery A hydraulic device for construction machinery includes a hydraulic pump; a hydraulic actuator having two fluid chambers; actuator fluid lines leading from each of the fluid chambers; pump fluid line leading from the pump; fluid tank fluid line leading to ... | 11/05/1996 |
| 5535773 | Hydromechanical differentiating apparatus A hydromechanical differentiating system for actuator dynamic stiffness enhancement and dynamic load damping. A free floating spool valve receives a pressure signal and moves in opposite directions away from a null position. When the valve moves in respon... | 07/16/1996 |
| 5476031 | Hydraulic setting device The hydraulic setting device (10) has a differential cylinder (11) whose pressure spaces (14, 18) can each be acted upon by a pump (17). The pressure conduits (15) and (19) between the pump and the two pressure spaces (14) and (18) are connected to a cont... | 12/19/1995 |
| 5415076 | Hydraulic system having a combined meter-out and regeneration valve assembly Fluid regeneration circuits are useful for filling expanding sides of a hydraulic cylinder with fluid being exhausted from the other side. The currently available circuits pass the excess fluid not needed for filling the expanded side of the cylinder thro... | 05/16/1995 |
| 5214997 | Control circuit for a double-acting hydraulic jack and slide distributor for such a circuit The control circuit of a double-acting hydraulic jack (10), consisting of a piston (12) connected to an output rod (18) and separating a cylinder into two chambers (14, 16), comprises a source of fluid under pressure (20, 26), a distribution system (28, 2... | 06/01/1993 |
| 5138838 | Hydraulic circuit and control system therefor Hydraulic control of reversible hydraulic motors typically requires several different valves to provide for the various operating parameters. The subject hydraulic control circuit has only a pair of electrohydraulic control valves to provide all the typic... | 08/18/1992 |
| 4878418 | Distributor for hydraulic cylinders A distributor for hydraulic cylinders (2), especially applicable to crane drive cylinders, which comprises an axial sliding runner (4) for selection of the oil circuit. Said runner (4) is hollow, forming two separate chambers (19,20) adjacent to the cylin... | 11/07/1989 |
| 4819541 | Control of a double-action pneumatic drive The drive is controlled such that reduced pressure is applied during a forward motion phase and venting flow from the drive is used as dynamic control pressure to hold off application of full driving pressure until, through physical impediment, piston mov... | 04/11/1989 |
| 4807518 | Counterbalance mechanism for vertically movable means A spindle carrier, which is movable vertically by an electric servo motor through a relatively long ball screw, has a substantially constant counterbalance force maintained on it irrespective of whether it is moving up or down. This prevents compression o... | 02/28/1989 |
| 4800990 | Three speed valve control for high performance hydraulic elevator A hydraulic elevator up direction control system is provided including a circulating valve connected between the supply and the return of a source that normally supplies pressure to the cylinder of an elevator controlled by a two position switchable setti... | 01/31/1989 |
| 4793238 | Control signal blocking direction control valve in load-sensing circuit A load sensing circuit of a load responsive direction control valve including a device for sensing load pressure signals, identifying those pressure signals as positive or negative and transmitting those identified positive or negative load pressure signa... | 12/27/1988 |
| 4741248 | Load responsive system having synchronizing systems between positive and negative load compensation A load responsive system is provided with two synchronizing systems for positive and negative load compensation. One of the synchronizing systems varies the flow through a negative load compensator, during control of a negative load, in response to the in... | 05/03/1988 |
| 4713936 | Motor seal protector valve A hydraulic motor has its lube drain connected to the motor return line. A motor seal protector valve has a pilot which responds to pressure in the motor return line. Normally, the valve connects system pressure to the motor inlet. High pressure in the re... | 12/22/1987 |
| 4694731 | Load compensated valve A load responsive system including individual positive and negative load compensators, for control of positive or negative load and an external logic system for determination of whether the controlled load pressure is positive or negative. The deactivatin... | 09/22/1987 |
| 4685295 | Control device for a hydraulically operated consumer The invention relates to a control unit for a hydraulically operated consumer of the type which is used for operating heavily intermittently and loaded machines such as cranes. The consumer is fed in accordance with a load sensing function with pressurize... | 08/11/1987 |
| 4610193 | Load control system A load control system is disclosed for preventing the uncontrolled lowering of a load should a line failure occur in a hydraulic system. The system is designed to be used with a hydraulic cylinder having a movable piston therein which divides the cylinder... | 09/09/1986 |
| 4610194 | Load sensing circuit of load responsive direction control valve A load sensing circuit of a load responsive direction control valve including a device for sensing load pressure signals, identifying those load pressure signals as positive or negative and transmitting those identified positive or negative load pressure ... | 09/09/1986 |
| 4608910 | Compressed fluid saving device The invention relates to a compressed fluid saving device positioned between the outlet of a distributor and the admission of a pneumatic jack. The device comprises a valve which is kept open, to allow the flow of driving fluid into one chamber of the jac... | 09/02/1986 |
| 4557674 | Flow sensing speed control for pressure fluid motor A rotary vane air or gas motor is provided with a primary exhaust port having an exhaust fluid throttling valve therein for controlling motor speed. The motor includes a secondary exhaust port for discharging exhaust fluid flow from the motor expansible c... | 12/10/1985 |
| 4513943 | Pressure medium actuated servo-motor system The servo-motor system is provided with an internal control line which communicates one control valve with a cylinder chamber which is connected to a control valve connected with an external control line. The internal control line permits the second valve... | 04/30/1985 |
| 4479553 | Pneumatically actuated and controlled device for carrying out operations on electronic components The front end of a handgrip mounts an interchangeable tool-holder for pincer type tools whose opening and closing is controlled pneumatically through a cylinder-piston assembly to which a source of compressed air is supplied. Downstream of the compressed-... | 10/30/1984 |
| 4446890 | Continuity actuated isolation valve assembly A hydraulic isolation valve (10) will not open if leaks are present in the associated utility subsystem (15). The continuity of the hydraulic fluid circuit actuates the valve (10) to the open position by an energized solenoid operated pilot valve (21) sen... | 05/08/1984 |
