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| Number | Title | Issue Date |
| 7322190 | Hydraulic system for synchronized extension of multiple cylinders A hydraulic system maintains squareness while extending an object via two lift cylinder assemblies. A hydraulic circuit is connected to the cylinder assemblies, and includes synchronizer with multiple isolated chambers corresponding to the cylinder assemblies, a rod... | 01/29/2008 |
| 7222703 | Apparatus for controlling hydraulic brakes in bicycles, motorbicycles and the like Apparatus for controlling brakes in bicycles and the like, made with a pump connected to a relevant reservoir, characterized in that the reservoir is disposed inside a containment body and exhibits a concave portion shaped complementarily to a handlebar's portion to... | 05/29/2007 |
| 7134280 | Hydraulic system for synchronized extension of multiple cylinders A lift table maintains levelness while lifting a support surface via two or more lift cylinder assemblies. A hydraulic circuit is connected to the cylinder assemblies, and includes synchronizer with multiple isolated chambers corresponding to the lift cylinder assem... | 11/14/2006 |
| 7108006 | Subsea actuator assemblies and methods for extending the water depth capabilities of subsea actuator assemblies A hydraulic pressure compensation system for valve actuator assemblies is described having particular application for subsea wellhead installations. The compensation system includes at least one valve actuator assembly having a housing that retains a reciprocable pi... | 09/19/2006 |
| 7107769 | Master cylinder A combined master cylinder and dump valve includes a piston slideable within a body bore that defines a master cylinder for pressurizing a brake port. The piston includes a piston seal for isolating a pressure port from a tank port, a piston bore, a first piston hol... | 09/19/2006 |
| 7108108 | Rod clamping device A device for clamping a rod to stop axial and/or rotative movement between the rod and the device. The device includes pressure and clamp units, the clamp unit having a bushing fixed therein and provided with a radially resilient center section normally sized to per... | 09/19/2006 |
| 7047738 | Hydraulic system for synchronized extension of multiple cylinders A lift table maintains levelness while lifting a support surface via two or more lift cylinder assemblies. A hydraulic circuit is connected to the cylinder assemblies, and includes synchronizer with multiple isolated chambers corresponding to the lift cylinder assem... | 05/23/2006 |
| 6971237 | Servoactuator having motor-driven actuator with hydraulic force amplification A servoactuator (20) is operatively arranged to control the movement of an output member (21) in either of two directions in response to a command signal. The servoactuator includes an electric motor (25); a first transmission mechanism (34 | 12/06/2005 |
| 6918249 | Pneumatic brake booster for use in a brake system A brake booster comprising an envelope (2) having a longitudinal axis (X) formed of a first (4) and of a second (6) shell to define an interior volume divided by moving a skirt into a low-pressure first chamber and a variable-pressure second cha... | 07/19/2005 |
| 6851261 | Servoactuator having motor-driven actuator with hydraulic force amplification A servoactuator (20) is operatively arranged to control the movement of an output member (21) in either of two directions in response to a command signal. The servoactuator includes an electric motor (25); a motor controller (24); a first... | 02/08/2005 |
| 6789389 | Piston-cylinder mechanisms and pressure control units utilizing such piston-cylinder mechanisms A piston-cylinder mechanism includes a cylinder (50) that defines a cylindrical bore (51). Two pistons (52, 53) are disposed within the cylindrical bore, so that a first pressure chamber (57), a second pressure chamber (58) and a t... | 09/14/2004 |
| 6789857 | Vehicle brake hydraulic pressure generator An improved brake hydraulic pressure generating device is provided in which the hydraulic pressure supplied from a hydraulic pressure source is adjusted to a value corresponding to the brake operating force by means of a pressure adjusting valve which is activated a... | 09/14/2004 |
| 6746326 | Hydraulic clutch A fluid operated actuator includes a shaft and a housing. The shaft is at least partially mounted in the housing for relative rotation between the shaft and the housing. The shaft includes a substantially central bore in which a first piston is mounted. The shaft al... | 06/08/2004 |
| 6705682 | Hydraulic brake apparatus for a vehicle A vehicle hydraulic brake apparatus includes a hydraulic pressure generator which generates a power pressure irrespective of operation of a brake pedal and a regulation valve which regulates the power pressure to a predetermined pressure corresponding to an operatio... | 03/16/2004 |
| 6629585 | Vehicle braking system A vehicle braking system in which an annular piston brake and a booster to generate an amplified output force for actuating the brake are combined to form an integrated unit. The booster is mounted on an axle casing in which the piston brake is located so... | 10/07/2003 |
| 6598713 | Hydraulic locking device A hydraulic intensifier generates a hydraulic pressure which is higher than the input hydraulic pressure generated in the discharge port and the outer periphery hydraulic pressure chamber. The hydraulic intensifier, provided inside a case member, has a di... | 07/29/2003 |
| 6467266 | Brake booster In a brake booster of the present invention, by depression of a brake pedal 3, an input shaft 4 travels to the left, a pedal input converter generates thrust, and a valve element 5a moves to the left. A valve passage 5a1 is shut off from a valv... | 10/22/2002 |
| 6434933 | Hydraulic pressure brake device for vehicles A hydraulic pressure brake device is provided with a vacuum boosting device performing a boosting operation and a hydraulic boosting device performing a hydraulic boosting operation. The hydraulic pressure brake device includes a valve device that prohibi... | 08/20/2002 |
| 5732811 | Ram with two control chambers and a clutch release bearing provided with such a ram The fluid-pressure ram, for controlling a clutch release bearing for an automobile clutch, has two variable-volume control chambers which follow each other axially and comprise a primary chamber which is fed with pressurized fluid and which is axially del... | 03/31/1998 |
| 5381661 | Hydraulic pressure transformer The invention relates to a hydraulic pressure transformer, wherein a storage chamber and a work chamber are connected with each other via an overflow bore into which a plunger piston dips to generate a pressure stage and thereby separates the two chambers... | 01/17/1995 |
| 5247871 | Combined pneumatic-hydraulic press head with high actuation speed The combined pneumatic-hydraulic press head includes a body inside which a substantially cylindrical main chamber is defined; the chamber accommodates a main piston and a secondary piston so that they can slide along an axial direction. The main piston ha... | 09/28/1993 |
| 5247870 | Combined pneumatic-hydraulic press with controlled stroke The combined pneumatic-hydraulic press with controlled stroke, includes a body inside which a substantially cylindrical main chamber is defined; the main chamber accommodates, so that it can slide along an axial direction, a working piston which protrudes... | 09/28/1993 |
| 5218821 | Pressure intensifier cylinder utilizing air A pressure intensifier drive unit has walls that form a cylinder with an intermediate divider plug separating a working chamber and a pressure intensifying chamber aligned in the cylinder. The working chamber has a working piston and a working piston rod ... | 06/15/1993 |
| 5188014 | Hydraulic cylinder with pressure transmission The hydraulic cylinder comprises a cylinder jacket (1), a piston-rod guide flange (2), and a cylinder bottom (3). Disposed within the cylinder are a primary piston (4) provided with a piston rod (6) and a secondary piston (11) connected to two plungers (7... | 02/23/1993 |
| 5176064 | Liquid pressure booster An improvement of a liquid pressure booster provided with a reaction piston is disclosed. A guide formed on a housing (plug) is caused to project into a tubular section of a power piston. A reaction piston is slidably supported by the guide, and an input ... | 01/05/1993 |
| 5150575 | Hydraulic brake booster A hydraulic booster for a vehicle brake master cylinder having a power piston with only one large diameter sliding seal which is exposed to a high hydraulic pressure. This provides a brake booster having lower hysteresis.... | 09/29/1992 |
| 5062268 | Fluid actuator A hydraulic actuator is formed by a first element incorporating a plurality of different sized piston cavities by a first set of piston elements which cooperate with a second set of piston elements and piston cavities respectively formed on a second eleme... | 11/05/1991 |
| 5058385 | Pneumatic actuator with hydraulic control The present invention provides a pneumatically powered actuator having hydraulic control for both locking and controlling the velocity of an output rod without any sponginess. The invention includes a double-acting pneumatic actuator having a bore, a pist... | 10/22/1991 |
| 5027600 | Brake booster with recessed shell receiving master cylinder flange The invention relates to a braking device for a motor vehicle having a bulkhead (1) separating the passenger compartment (5) from the engine compartment (3). The device comprises a master cylinder (7) having a flange (13), via which it is fastened by mean... | 07/02/1991 |
| 5009068 | Pneumatic cylinder with positioning, braking, and feed rate control A pneumatic piston/cylinder unit comprises primary and secondary pistons operable in first and second cylinder zones respectively. Each of the primary and secondary pistons divide its respective cylinder zone into two chambers, one of the chambers of the ... | 04/23/1991 |
| 4967643 | Brake booster In a brake booster, a master brake cylinder is connected to a brake pedal via a piston rod, which acts upon a master cylinder piston by way of which at least one brake chamber can be put at brake pressure. In this way, servo fluid flows via brake lines to... | 11/06/1990 |
| 4955197 | Master cylinder attachment adapter An apparatus is provided for connecting a master cylinder to a brake booster of the type which has a shell with a planar front surface and a plurality of threaded studs displayed about the bore and projecting from the planar front surface. The master cyli... | 09/11/1990 |
| 4949542 | Triplex piston system for hydraulic brakes In a brake system having an auxiliary, booster or slave cylinder, the addition of a middle chamber between the forward and rear chambers of the master cylinder to increase the unit pressure (psi) and insure sufficient fluid volume to prevent failure of th... | 08/21/1990 |
| 4891945 | Boost-failure responsive fluid tapping valve in tandem master cylinder with booster piston at pedal-remote end of master cylinder The brake pressure generator (1) includes a tandem master cylinder (2) actuable by two booster pistons (19, 32) to which a hydraulic auxiliary pressure is applied and by a pedal actuating mechanism (17,18). A control valve (14, 20) controls the auxiliary ... | 01/09/1990 |
| 4884403 | Modular brake actuator A modular brake actuator useful in automotove vehicles includes a mounting base adapted to fit into a complementary opening in and form part of the fire wall between the engine compartment and the driver's cockpit. On one side of the mounting base there a... | 12/05/1989 |
| 4879875 | Fastener driving tool A fastener driving tool for driving remotely located fasteners through preformed openings in a structure. The tool (10) comprises a housing (12) having a pneumatic-hydraulic intensifier (14) mounted thereon and a remotely located second hydraulic cylinder... | 11/14/1989 |
| 4876853 | Tandem master cylinder with booster piston at pedal-remote end of master cylinder and with booster-pressure responsive reservoir valve for forward brake circuit A tandem master cylinder with a booster used for a hydraulic actuator such as an automotive brake system. The master cylinder has a first and a second independently movable presser piston disposed in tandem in a first housing such that the presser pistons... | 10/31/1989 |
| 4823560 | Refrigeration system employing refrigerant operated dual purpose pump An engine or heat pump for a refrigeration system employing a first elongated expansion-compression device defining a pair of chambers, each having a linearly movable piston therein which are axially interconnected by a hollow cylinder. A second expansion... | 04/25/1989 |
| 4809508 | Clutch-disengaging hydraulic actuators preventing wheel slip Hydraulic booster device intended to be arranged in parallel with a primary actuation circuit between an actuator mechanism and a receiver, the device comprising an electromagnetic valve mechanism (10) arranged between an actuator (12) and a pressure-flui... | 03/07/1989 |
| 4798125 | Pneumatic type of hydraulic structure This invention pertains to a pneumatic mode under which the structure of a hydraulic system is driven, particularly denoting the pneumatic mode under which a mini air compressor is being used as a means to elevate a hydraulic jack. This invention makes us... | 01/17/1989 |
