Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6938538 | Bore seal telescopic hoist A bore seal telescopic hoist is formed of a series of telescopically arranged tubular sections each having a circumferential reservoir. A circumferential wiper is lodged in the reservoir and is used to collect debris or dirt which may be present on the inner wall of... | 09/06/2005 |
| 6718765 | Brake booster device, with improved operating conditions, for motor vehicle A braking device comprising a master cylinder (2), a primary piston (3), a manual control member (4), a booster (6) coupled to the manual control member (4) and an emergency assist valve (VA). The emergency assist valve comprising ... | 04/13/2004 |
| 6711986 | Device for coupling a lever to a shift cylinder piston A device having a rigid rod mobile in a translational and/or rotational movement, whereof one end penetrates inside a recess of a piston and is fixed by a swivel to the recess of the piston directly or via an insert. The insert is mounted inside the recess of the pi... | 03/30/2004 |
| 6679053 | Device for preventing unintentional restarting A device for preventing the unintentional restarting of motors or machines is proposed, it being possible to control the supply of energy to the motor or to the machine by means of a control valve with a mechanically adjustable control element and it bein... | 01/20/2004 |
| 6672199 | Cylinder block of an axial piston compressor with elongated cylinder face Cylinder block (32) of an axial piston compressor (20), in particular for use in a vehicle air conditioner with CO2 as coolant, which comprises at least one, in particular several cylinder bores distributed about a periphery, each of which defi... | 01/06/2004 |
| 6672198 | Vacuum brake booster with mechanical emergency braking aid A vacuum brake booster (10) is described, having a vacuum chamber (16) and a working chamber (18) separated from one another by a movable wall (14), and a control valve (20), which comprises a housing (12) coupled workingly to the movable wall (14) and wh... | 01/06/2004 |
| 6672056 | Device for cooling components by means of hydraulic fluid from a hydraulic circuit The invention relates to a device for cooling at least one component by hydraulic fluid from a hydraulic circuit. The hydraulic circuit includes a hydraulic pump, at least one user of hydraulic energy, and a reservoir. The component is connected into the ... | 01/06/2004 |
| 6666128 | Swash plate in swash plate type compressor A swash plate type variable displacement compressor has a housing, a drive shaft, a swash plate and a piston. The housing includes a cylinder block, a front housing, and a rear housing. The drive shaft is rotatably supported by the housing. The swash plat... | 12/23/2003 |
| 6666127 | Artificial muscle A hydraulically actuated artificial muscle for use with orthetic devices, prosthetic devices or as an actuator for other applications in medical or robotic devices. Working fluid is pumped between two expandable fluid-containing cells, which are complimen... | 12/23/2003 |
| 6662556 | Hydraulic systems for a small loader A small self-propelled loader has hydraulic drive motors and at least one work cylinder, and has a hydraulic system that efficiently utilizes the available horse power from an internal combustion engine on the loader. The engine drives a tandem pump and t... | 12/16/2003 |
| 6662559 | Hydraulic actuator The present invention provides a hydraulic actuator suitable for use in marine and other harsh environments. In the presently preferred embodiment, the hydraulic actuator includes a motor that is coupled to a pump assembly that is configured to displace h... | 12/16/2003 |
| 6662709 | Hollow piston for a piston engine and method for producing a hollow piston A hollow piston (1) piston engine including a closed annular cavity (9). Said hollow piston constituted of a first piston part (1a) with a base section (3) from which a joint part (4) extends in one axial direction, and from which a peripheral wall (6) th... | 12/16/2003 |
| 6658844 | Plastic master cylinder for hydraulic brake system A master cylinder having a reservoir and a cylinder formed from a single piece of molded plastic. A sight gauge is molded into a sidewall of the reservoir to permit the level of hydraulic fluid to be checked without removing the reservoir's cap. A vent ho... | 12/09/2003 |
| 6658842 | Hydraulic system A hydraulic system includes an air sucking hydraulic circuit 8, an air sucking control valve 5, and a check valve 6 provided in or before and after the air sucking hydraulic circuit 8, hereby allowing a hydraulic fluid from the air sucking control valve 5... | 12/09/2003 |
| 6655135 | Construction machine In a construction machine according to the present invention wherein there is made an engine speed sensing control to control a pump horsepower in accordance with an engine speed of an engine, there is performed, in a low temperature condition with hydrau... | 12/02/2003 |
| 6655138 | System and method for actuating and controlling a transfer case One aspect of the control system provides a hydraulic control system for a transfer case that includes an actuator for generating fluid pressure. The system also includes an isolation valve and a control valve in fluid communication with the actuator. The... | 12/02/2003 |
| 6655258 | Rodless cylinder using a round stick type chain A rodless cylinder using a round stick type chain can be applied to a carrier for transportation of materials. The rodless cylinder uses a round stick type chain having the round stick type chain and the chain sprocket, which serve to guide the round stic... | 12/02/2003 |
| 6655256 | End stops for dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 12/02/2003 |
| 6651549 | Dual gallery piston A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling o... | 11/25/2003 |
| 6647719 | Hydraulic oscillator as a drive of machines The invention proposes a novel drive with electrical power control for machines which have to execute cyclic movements with high accelerations. An electric motor drives a pump which, in turn, is connected directly to a cylinder. This arrangement has added... | 11/18/2003 |
| 6644170 | Double spline hydraulic pump In a hydraulic pump assembly, an annular sleeve member is radially interposed between an outer peripheral surface portion of an input shaft and an inner peripheral surface portion of a cylinder block or barrel within which are provided a plurality of pist... | 11/11/2003 |
| 6644172 | Sliding device A semi-spherical shoe 1 includes a semi-spherical surface 1A and a flat end face 1B. The semi-spherical surface 1A comprises a sliding contact region 1a which is disposed in sliding contact with a semi-spherical recess 2B formed in a piston 2, and a lead-... | 11/11/2003 |
| 6640689 | Double-rack-and-pinion swinging apparatus In air flow paths of a swinging apparatus in which racks are respectively provided to pistons of a pair for swinging in cylinder bores of a pair disposed in parallel in a casing, a pinion is engaged with the racks, and the pistons of the pair are synchron... | 11/04/2003 |
| 6640690 | Swash plate type compressor and shoe for the same A shoe for use in a swash plate type compressor, interposed between a swash plate and a piston, has a base member and metal plating layer. The base member is made of aluminum alloy. The metal plating layer coats at least a part of surface of the base memb... | 11/04/2003 |
| 6640685 | Closed loop electrohydraulic actuator control circuit A hydraulic control system for controlling expansion and contraction of a cylinder. The cylinder comprises an extension chamber and a contraction chamber. The hydraulic control system comprises a first servovalve comprising a first pressure supply port an... | 11/04/2003 |
| 6640541 | Master cylinder for use in power trains of motor vehicles A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of th... | 11/04/2003 |
| 6637311 | Sensory feedback system for an electro-hydraulically controlled system An apparatus for providing feedback to an operator relative to a force applied to a system is disclosed. The apparatus has a first magnet and a second magnet. The first magnet receives a signal indicative of the force applied to the system and generates a... | 10/28/2003 |
| 6637312 | Assembly and mounting of an engine drive mechanism A mounting assembly for connection of a drive mechanism to an engine. The engine includes pistons, an engine block and an output shaft. The assembly includes a drive mechanism, connecting rods and a pedestal, whereby the assembly is mounted to the engine ... | 10/28/2003 |
| 6637316 | Pressure fluid cylinder with optional anti-rotation feature A pressure fluid cylinder with anti-rotation feature, includes a cylinder tube of non-circular inner cross section and a piston which is sealingly received in the tube. The piston has a circular cross section and is connected at one end to a piston rod in... | 10/28/2003 |
| 6634275 | Automatic brake booster An automatic brake booster 1 includes a solenoid 8 which causes a back- and forth movement of a solenoid plunger 31 to switch a valve mechanism 6. A second vacuum valve seat member 11 including a second vacuum valve seat 12 which is juxtaposed with a firs... | 10/21/2003 |
| 6634172 | Thermal contraction control apparatus for hydraulic cylinders A method and apparatus for operating a load lifting device to move a load and hold the load steady is disclosed. In the conventional arts, a lifted or lowered suspended load had a tendency to move from its desired position, as hydraulic fluid in the lifti... | 10/21/2003 |
| 6631670 | Device and a unit for locking the sliding of the rod of a linear actuator The locking device comprises a plurality of rolling wedging members consisting of diablo-shaped rollers with two cylindrical end portions and an intermediate portion which is concave according to a generatrix in the form of an arc of circle whose radius c... | 10/14/2003 |
| 6629410 | Constant velocity transmission A constant velocity transmission which provides maximum torque and speed from a power source such as an internal combustion engine to an output shaft of the transmission while maintaining the engine at optimum operational speed. The transmission takes adv... | 10/07/2003 |
| 6625983 | Hydraulic power system An hydraulic power system having a reversible motor operating a pump to deliver liquid under pressure to operate an actuator mechanism, where the motor is submerged within the liquid inside a reservoir. Flow direction of the liquid is controlled by altern... | 09/30/2003 |
| 6626079 | Pneumatic motor In one embodiment a pneumatic motor is provided that includes an intake chamber in fluid communication with at least one intake channel. Each intake channel is further in fluid communication with a corresponding cylinder, which receives a piston that cycl... | 09/30/2003 |
| 6626082 | Table feed system In a machine tool by pulse drive of a hydraulic system, a piston of a hydraulic cylinder is connected with a table, and an outflow valve and an inflow valve, which form a pair, are respectively connected with a right and a left hydraulic chamber. When the... | 09/30/2003 |
| 6625982 | Electronically controlled hydraulic actuating system An electrically controlled hydraulic actuating system includes a servocontrol including a cylinder, a piston dividing the cylinder into two chambers each provided with a hydraulic connection port, a control valve connected to a hydraulic circuit. A two-wa... | 09/30/2003 |
| 6626083 | Spring brake actuator with hot set spring A spring brake actuator has a sealed spring chamber with a hot set large force compression spring. An alternative embodiment has the hot set spring guided by the actuator rod.... | 09/30/2003 |
| 6622483 | Ocean wave energy extraction system and components thereof The invention relates to wave powered energy extraction systems and the components thereof, in which the oscillating ocean wave motion is used to displace a volume of air to drive a wind operated turbine connected to an electrical generator. The various a... | 09/23/2003 |
| 6622612 | Pump, particularly plunger pump A pump, particularly a plunger pump, comprises a crank mechanism oscillating a plunger in a housing and an elastic sealing device fastened to the plunger. The sealing device provides a pressure-tight sealing with respect to a lower housing space containin... | 09/23/2003 |
