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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7370569 | Hydraulic drive What is disclosed is a hydraulic drive mechanism for a blanking or forming machine comprising a working cylinder having several pressure chambers, the piston of which acts directly or indirectly on a workpiece to be processed, wherein at least one pressure chamber o... | 05/13/2008 |
| 7347171 | Engine valve actuator providing Miller cycle benefits An engine valve actuator providing Miller cycle benefits and a method of operating an engine valve actuator are disclosed. The valve actuator employs a first force to hold an exhaust valve of the engine open during an exhaust stroke and a second, stronger force to h... | 03/25/2008 |
| 7337807 | Hydraulic control valve with regeneration function The present invention A hydraulic control valve with a regeneration function, including a main body formed of a supply fluid passage to which pressurized fluid is supplied, at least one port, a tank fluid passage for discharging the pressurized fluid to an outside s... | 03/04/2008 |
| 7264059 | Method and device for pressure controlled sequential operation A method and a device for controlling a downhole hydraulic sequential control system (1) in which a number of pressure relief valves (20, 22) are arranged to open sequentially directly or indirectly for corresponding actuators (26, 34) through i... | 09/04/2007 |
| 7210393 | Progressive-starting unit for pneumatic systems A progressive-starting unit for pneumatic circuits comprises a line inlet and a line outlet interconnected with each other by a regulating valve that is piloted by a pneumatic piloting inlet. The piloting inlet is controlled by the outlet of a progressive-starting d... | 05/01/2007 |
| 7121266 | Fuel pump cutoff shuttle valve A fuel pump cutoff shuttle valve is located between a multiple fuel pump arrangement. The valve has a first tubular member with a hollow, biased sliding member inside that moves according to the fuel pressures of the pumps. The fuel that flows through the valve memb... | 10/17/2006 |
| 7114431 | Fluid powered apparatus for operating a mechanism during an emergency An apparatus includes a reservoir of a pressurized fluid connected to a supply conduit. A fluid powered actuator has a first port and an second port. A volumetric flow regulator has a valve element that controls fluid flow between an inlet chamber which receives flu... | 10/03/2006 |
| 7051856 | Method and apparatus for applying and releasing a clutch An apparatus for applying and releasing a clutch piston in a clutch cylinder against a return spring includes a fill oil chamber having first and second portions separated by a fill piston. The first portion is in fluid communication with the clutch cylinder through... | 05/30/2006 |
| 7007447 | Actuator device with a multi-chamber housing An actuator device self-contained within a housing and adapted to move an object. The actuator device includes a movable piston positioned in a cylinder portion of the housing. The cylinder portion defines a longitudinal axis, whereby the piston is movable along the... | 03/07/2006 |
| 6969042 | Blowout preventer and ram actuator A blowout preventer with a main body; a base releasably connected to the main body, the base having a base space therein, the base having a ram shaft opening; a primary piston movably disposed within the base space; a ram shaft to which the primary piston is connect... | 11/29/2005 |
| 6925916 | Two stage punch press actuator with output drive shaft position sensing A press for forming a workpiece with a tooling set includes an actuator assembly carrying a movable half or punch of the tooling set and having a two phase operation. In the first phase the actuator provides relatively low force in moving the punch to an intermediat... | 08/09/2005 |
| 6357560 | Servo assembly for operating a brake band in an automatic transmission vehicle A servo assembly 22 for selectively engaging a brake band 14 in an automotive vehicle is disclosed. Servo assembly 22 includes a piston 26 at least partially encased in a housing 24 and a first and second supply 111, 132 of hydraulic fluid which selective... | 03/19/2002 |
| 6295812 | Hydraulic jack A hydraulic jack includes a moveable base seat. A lift arm, a handle and a hydraulic driver each mounted on the base seat. The hydraulic driver is driven by the handle to push the lift arm to lift an object. The hydraulic jack has a compound piston assemb... | 10/02/2001 |
| 5832805 | Method and apparatus for controlling speed of hydraulic cylinder In order to improve speed controllability both in low and high speeds, thereby stabilizing the speed of a hydraulic cylinder, both the flow-in amount of hydraulic operating fluid flowing from a hydraulic source to the hydraulic cylinder having a run-aroun... | 11/10/1998 |
| 5791226 | Fluid regeneration device for construction vehicles A return fluid regeneration device for construction vehicles is provided. The regeneration device includes an orifice disposed on a return-side internal line of a directional control valve of an actuator. A regeneration line is arranged between the return... | 08/11/1998 |
| 5711403 | Rapid apply servo for a brake band of an automatic transmission A servo for operating a brake band in an automatic transmission includes a transmission casing and servo cover defining a servo cylinder, a servo piston supported for displacement within the cylinder, first and second sealed volumes within the cylinder, a... | 01/27/1998 |
| 5699829 | Fluid control valve with soft startup A fluid control valve includes an adjustable soft start capability. The fluid control valve isolates an input port and connects an outlet port to an exhaust port when the fluid control valve is in its closed position. A system is provided for locking the ... | 12/23/1997 |
| 5669422 | Slow start valve A slow start valve has a first valve member for opening and blocking a flow passage between an inlet port and an outlet port and a second valve member for opening and blocking a flow passage between the outlet port and an exhaust port, both being integral... | 09/23/1997 |
| 5307727 | Neutral to drive shift time control In a neutral to drive shift timing control mechanism, a flow control arrangement is utilized in an electro-hydraulic control system for controlling a clutch fill period of a neutral to drive shift sequence. The hydraulic control system provides a pressure... | 05/03/1994 |
| 5269141 | Hydraulic safety and regulating system This hydraulic safety and regulating system for a steam feed of a turbine has a rapid-action (4) and a steam regulating valve (3), and a line system monitored by a safety downward-control unit (22). The monitored line system is designed as both a power oi... | 12/14/1993 |
| 5067519 | Safety valve for fluid systems An improved safety valve includes piston-actuated provisions for gradually pressurizing a fluid-actuated motor during start-up of the system, preferably by way of a changeable flow restriction. In addition such improved safety valve preferably includes a ... | 11/26/1991 |
| 5060355 | Machine tool with a high-pressure and a low-pressure hydraulic network In order to improve a machine tool comprising at least one hydraulic drive for working motion or rapid motion operation connected via a supply pipe to a high-pressure network supplied by a high-pressure pump so that the drives can be operated with high pr... | 10/29/1991 |
| 5042362 | Hydraulic control system for the drive control of a double-acting hydraulic cylinder A hydraulic control system for the drive control of a double-acting hydraulic cylinder with a larger driving surface and a smaller countersurface, in which the direction- and movement-controlling valve is provided in the form of a follow-up adjusting valv... | 08/27/1991 |
| 4984427 | Control circuit for hydraulic actuator A control circuit for a hydraulic actuator which allows the hydraulic actuator to be operated readily without much skill and at a suitable speed in accordance with a load applied thereto. The control circuit includes a change-over valve provided intermedi... | 01/15/1991 |
| 4955195 | Fluid control circuit and method of operating pressure responsive equipment A fluid control circuit and method of operating equipment such as a blowout preventer having a two-way hydraulic piston and cylinder assembly. The circuit includes various features such as a dual pressure level independently controlled fluid supply, a ded... | 09/11/1990 |
| 4864914 | Blowout preventer booster and method A hydraulic control circuit and method of operating a blowout preventer having a two-way hydraulic piston and cylinder assembly including an open and close port. An adjustable hydraulic supply is connected to a control valve which is in turn connected to ... | 09/12/1989 |
| 4836087 | Hydraulic control apparatus for vehicle A hydraulic control apparatus for a vehicle capable of being significantly simplified in structure and stabilizing its control characteristics. The apparatus includes a variable constriction provided in a first flow passage arranged between a steering pum... | 06/06/1989 |
| 4833971 | Self-regulated hydraulic control system A self-regulating hydraulic control circuit for controlling the flow of fluid to and from the cylinder of a double-acting hydraulic motor employs two pumps, one of which supplies fluid at a relatively high pressure and low displacement while the second pu... | 05/30/1989 |
| 4821622 | Extension and retraction sequencing circuit An improved hydraulic circuit for automatically sequencing a pair of hydraulic cylinders through alternate extension and retraction cycles. A manually operated control valve initiates addition and withdrawal of fluid within the circuit and a logic valve d... | 04/18/1989 |
| 4817497 | Multiple-circuit valve apparatus A bidirectional flow communication passageway is provided by the present invention in a multiple-circuit fluid pressure responsive system on a motor vehicle to allow a gradual reduction of pressure in a parking brake circuit which is a part of such system... | 04/04/1989 |
| 4794842 | Valve means for connecting at least one consumer to a hydraulic pressure line For connecting servohydraulic linear or rotation drives to a line with impressed pressure a valve means is provided which shuts off the pressure-carrying lines in leakage-free manner and connects the consumer line pressure-free to the tank. For a trial se... | 01/03/1989 |
| 4759256 | Tensioner recoil control apparatus Apparatus for controlling fluid communication with a fluid pressure system includes parallel flow paths connected to the system. A first flow path includes first valve apparatus for selectively closing the flow path. The second flow path includes relief v... | 07/26/1988 |
| 4617954 | Valve assemblies A valve assembly is provided for use with a hydraulic mine roof support, the assembly having uni-directional control means 49 interconnecting first and second pressure sectors of the valve assembly, and further control means 20 embodied in the first press... | 10/21/1986 |
| 4583624 | Fluid system with selective differential pressure control Fluid systems having modulating pressure relief valves are normally needed in systems having clutches that require smooth engagement. It is also desired in many systems to maintain a difference in pressure levels between the fluid in different clutches, s... | 04/22/1986 |
| 4566477 | Fluid flow control apparatus An apparatus for controlling fluid flow to a steering motor and an auxiliary apparatus is capable of smoothly changing between conditions in which it directs relatively small and relatively large flows of fluid to the auxiliary apparatus. The apparatus in... | 01/28/1986 |
| 4560044 | Hydraulic pressure modulation device A hydraulic pressure modulation device disposed between a hydraulic pressure source and a selector valve comprising a cylinder; a spool fitted into the cylinder; an accumulator; an actuation chamber formed in the cylinder; a passage openly connecting the ... | 12/24/1985 |
| 4559777 | Power steering apparatus with at least one additional hydraulic load connected to it A power steering apparatus with a pressure supply for additional loads, the steering pump of which has a plurality of feed chambers separate from one another. The additional loads, such as a brake booster and/or a level regulating device, are connected to... | 12/24/1985 |
| 4558629 | Hydraulic control means for pipe thrust-jacking apparatus Pipe thrust-jacking apparatus includes a pressure ring 5 which is advanceable by a plurality of hydraulic rams 3. The rams are controlled by hydraulic control means having a plurality of hydraulic control valves 19. Each control valve is associated with a... | 12/17/1985 |
| 4549564 | Pressure modulator valve A modulation valve for controlling flow to a fluid consuming device which valve provides a gradual buildup of fluid pressure and during at least part of the buildup restricts flow to the consuming unit. The valve includes a slide movable by a spring on on... | 10/29/1985 |
| 4535678 | Hydraulic control apparatus for a servo-motor, particularly for vehicle steering The invention relates to a steering control unit for a bidirectional servomotor which is connectable to steerable wheels. A steering wheel controlled quantity setting unit of a known type has ports connectable to a pump and a return tank and two control p... | 08/20/1985 |
