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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 7216581 | Piston locking actuator A locking actuator may be locked in an extended position. A piston with a first and a second end defines a recess that originates proximate to the first end. A strut is adapted to at least partially nest within the recess and the strut is adapted to hold at least on... | 05/15/2007 |
| 7201095 | Vehicle system to recapture kinetic energy A fluid drive system that can be used to drive a vehicle and has energy regeneration and storage capabilities. The fluid drive system includes an electrical energy supply source mounted on the vehicle, at least one electrical motor electrically connected to the elec... | 04/10/2007 |
| 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 |
| 7171888 | Hydraulic cylinder A hydraulic cylinder comprising a cylinder, a piston which is adjustable in the cylinder, and at least one pressure connection which is disposed in the vicinity of an end position of the piston and through which a pressure fluid can be introduced into the cylinder, ... | 02/06/2007 |
| 7134634 | Column unit The present invention relates to a column unit which connects a chair sheet to a base in which a wheel is installed. The present invention provides a column unit which comprises a base tube having a lower end portion vertically fixed to a base of a chair and having ... | 11/14/2006 |
| 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 |
| 7066074 | Fluid motor The piston of a fluid motor divides the cylinder into two variable volumes into which and from which fluid may be selectively introduced and exhausted via ports through the cylinder to relatively move the piston and the cylinder. The piston is modified to define two... | 06/27/2006 |
| 7021192 | Cylinder apparatus A pair of throttle valves are installed to first and second installation holes of a cylinder tube, respectively. The throttle valve comprises a rotatable member, a needle which is engaged with the rotatable member and which controls the flow rate of a pressure fluid... | 04/04/2006 |
| 7021434 | Self-pumping hydropneumatic suspension strut Self-pumping hydropneumatic suspension strut with internal height control, in particular for motor vehicles with a work cylinder which is filled with oil and is under pressure by at least one gas cushion which is arranged in a high-pressure chamber and which acts as... | 04/04/2006 |
| 6988471 | Engine valve actuation system An engine valve actuation system includes an engine valve moveable between first and second positions, a valve actuation assembly connected to move the engine valve between the first and second positions, a fluid actuator configured to selectively modify a timing of... | 01/24/2006 |
| 6758127 | Pressurized medium activated working cylinder A pressurized medium activated working cylinder with a piston that can move longitudinally in a cylinder chamber between two end positions has a device for damping the movement of the piston when it approaches each end position. This device comprises, e.g., a dampin... | 07/06/2004 |
| 6739235 | Hydraulic control device A hydraulic control device having a hydraulic actuator with a cylinder space, in which a piston is accommodated. In the cylinder space the piston bounds a first chamber and second chamber. The housing is provided with a first and a second connection for the supply a... | 05/25/2004 |
| 6722257 | Workpiece high-speed pressurizing method and mechanism by using cylinder with cushioning mechanism At a step of pressurizing a workpiece after reducing a speed of a piston rod at an end of a forward stroke of the piston rod by restrictively allowing compressed air to flow out of an exhaust-side pressure chamber, operation of a rapid exhaust valve is triggered by ... | 04/20/2004 |
| 6490961 | Linear actuator with air cushion mechanism In a linear actuator in which a slide table on a pedestal is caused to reciprocate linearly by two air cylinder mechanisms mounted in the pedestal, exhaust holes are provided to positions adjacent to ports, flow rate restricting mechanisms for restricting... | 12/10/2002 |
| 6463841 | Lift cylinder To facilitate assembling work of a check valve to improve workability at the time of assembling a lift cylinder. In a lift cylinder, a check valve 4 disposed in a shaft center part of a piston 2 has a valve seat member 41, a poppet valve, a bias spring 43 and ... | 10/15/2002 |
| 6336390 | Linear actuator with air cushion mechanism In a linear actuator in which a slide table on a pedestal is caused to reciprocate linearly by two air cylinder mechanisms mounted in the pedestal, exhaust holes are provided to positions adjacent at ports and, flow rate restricting mechanisms for restric... | 01/08/2002 |
| 6186043 | Cushion hydraulic cylinder A cushion hydraulic cylinder is provided with a series of longitudinally separated metering orifices in the wall of the cylinder through which exhausted fluid is expelled. As the piston extends towards these metering orifices a seal sequentially cover and... | 02/13/2001 |
| 6173938 | Two speed air cylinder for slit valve motion control A multi-speed slit valve apparatus and method of actuating a slit valve apparatus at least at two distinct speeds is provided. The slit valve apparatus includes a pneumatic cylinder 210 having a primary channel 254, 266 and auxiliary channel 258, 270 at e... | 01/16/2001 |
| 6029561 | Fluid pressure cylinder A fluid pressure cylinder (1) includes two cylinder end walls (6',6"), a cylinder tube (2) and a piston (3), which is axially movable inside the cylinder tube, wherein at least one of the cylinder end walls is provided with an outward housing portion (7;6... | 02/29/2000 |
| 5992293 | Cylinder device The invention concerns a device in an piston cylinder aggregate including a valve element (8) which comprises a valve body (9) for choking the flow in a fluid channel (6) in co-operation with a valve opening (7), wherein the device is arranged in a bore (... | 11/30/1999 |
| 5692428 | Fluid-powered cylinder A rodless pneumatic cylinder includes main exhaust ports defined by the open ends of a pair of fixed tubular members that extend, respectively, into the cylinder body from its opposed ends. The main piston of the rodless cylinder has an axial bore formed ... | 12/02/1997 |
| 5461965 | Cushioned hydraulic lift mechanism with slot in cylinder wall A hydraulically operated piston apparatus including an outer cylinder having an inner telescopically received piston rod. An elongated slot forms a hydraulic fluid outlet through the wall of the cylinder adjacent the closed end of the cylinder. The piston... | 10/31/1995 |
| 5423243 | Pneumatic cylinder with cushion mechanism A relief valve 23 serving as cushion pressure adjusting means in a cushion mechanism is provided on a support member 4, and the support member 4 is rotatably mounted on covers 2 and 3 of a pneumatic cylinder in order to facilitate adjustment of relief pre... | 06/13/1995 |
| 5413030 | Self-energizing snubber for a hydraulic motor Snubbers are useful in dampening inertia loads at the end of stroke movement of a hydraulic motor. The known snubbers usually restrict fluid flow therethrough in the non-snubbing mode thereby slowing the response of the motor in the opposite direction. Th... | 05/09/1995 |
| 5226346 | Axial piston type pressure medium servomotor control device An axial piston-type servomotor uses control connections on the working cylinder and corresponding control edges on the working piston, together with selector valve apparatus for controlling the working piston into a central stroke position.... | 07/13/1993 |
| 5188016 | Cylinder structure for a pneumatically operated tool An improved cylinder structure for a pneumatically operated tool, which is characterized in the two air tight chambers defined at the front and rear ends of the cylinder so that the air confined therein can produce reaction pressure respectively to reduce... | 02/23/1993 |
| 5029514 | Nozzle hydraulic actuator ring with cooling flow A hydraulic actuator system, for use in an aircraft, and in which the servo fluid supply to the system is used to provide for the operation and cooling of the system. The system comprises a hydraulically operated piston mechanism including at least one hy... | 07/09/1991 |
| 4910961 | Hydraulic door opening or closing device A hydraulic door opening or closing device comprises a hydraulic fluid pump motor having two ports connected to each end of integral dual manifold and operating cylinder apparatus by way of two branch fluid lines. One branch line is fluidly connected to a... | 03/27/1990 |
| 4805517 | Gas return railway car hydraulic cushioning unit and method of converting a spring return unit A railway car hydraulic cushioning unit prevents the mixing of gas and hydraulic fluid in chambers interiorly and exteriorly of a high pressure cylinder unit by strategic placing of metering ports through the cylinder wall at positions below the level of ... | 02/21/1989 |
| 4794681 | Fluid cylinder cushioning system A cushioning system for a fluid power cylinder includes a first passage for the flow of fluid to and from the space between the piston and end cap closure of the cylinder, and a second passage including a throttling valve for throttling the flow of fluid ... | 01/03/1989 |
| 4718325 | Hydraulic swing control for boom assembly An improved mechanism is provided for controlling the relative pivoting movement of two members about a main pivot axis as effected by two hydraulic motors. Each hydraulic motor is a double-acting piston-cylinder type that is fully extended when its respe... | 01/12/1988 |
| 4657474 | Moving means for use in a glassware manufacturing machine The moving means is for use in moving an operative member between an out-of-the-way position and an operative position by a movement having a linear component in a vertical direction and a rotary component about a vertical axis. A first shaft on which the... | 04/14/1987 |
| 4619593 | Apparatus comprising a turbine and associated water extractor and method of translating the potential energy of deep sea water into useful work This disclosure is directed to a method and combined apparatus for converting or translating the immense potential energy of the deep sea water into useful work by providing a jointly enclosed environment in a column or mass of a fluid in which a containe... | 10/28/1986 |
| 4601231 | Rotary actuator and making method thereof A novel rotary actuator utilizes viscosity of the oil and prevents the oil leakage, without using the sealing member to the vane. The instant device installs the flanges in parallel and fixes the vane therebetween, and sets within the cylinder the rotor k... | 07/22/1986 |
| 4569271 | Hydraulic boosters for vehicle hydraulic systems An hydraulic booster has a housing provided with a bore, an inlet connected to a source of pressure fluid, and an outlet connected to a reservoir for fluid, a boost piston being advanced in the bore in response to pressurization of a boost chamber, the bo... | 02/11/1986 |
| 4469010 | Motion dampening seat suspension system A system for resiliently supporting a load at a reference height includes a hydraulic cylinder for resiliently supporting a load about a reference height and an accumulator which cooperates with the cylinder for flowing hydraulic fluid therebetween in res... | 09/04/1984 |
| 4422366 | Rotary helical actuator Helically splined hydraulic actuator provided with hydraulic cushioning and rapid initiation of movement. The actuator is provided with an elongated cylindrical bearing integral with the shaft of the actuator for increasing radial and moment load-carrying... | 12/27/1983 |
| 4397220 | Air cushion for pneumatic impact tool The invention disclosed comprises an air cushion system that utilizes a two-diameter piston and a floating bushing to create an effective air cushion seal which prevents the piston from hitting the barrel bridge.... | 08/09/1983 |
| 4393751 | Two hole hydraulic cushion valve A cushion valve for a hydraulic piston. The valve includes two inlet ports each connected into the same end of the cylinder. One port leads directly to an outlet while the second port feeds to the outlet through a floating, restricted flow orifice to prov... | 07/19/1983 |
| 4364301 | Vacuum actuator A vacuum actuator for connection to a vacuum source, the actuator utilizing a diaphragm combination having three stable positions. An annular diaphragm, having its outer periphery fixed in a housing, has its inner periphery secured between two movable ann... | 12/21/1982 |
