Abstract: The present invention provides a brake booster that, although simple in construction, capable of adjusting the braking force derived by operation of a solenoid mechanism without worsening the braking response. In the brake booster according to the present invention, when a movable member (34) is shifted toward the rear side by electromagnetic force of a solenoid (31), the shifting movement is transmitted to a valve seat member (21) through pins (50) to open an atmospheric valve (27) through which air is introduced into a variable pressure chamber (9,10), whereby a pressure difference is created between the variable pressure chamber and a constant pressure chamber and generates booster output (thrust output force).

Abstract: A hydraulic system comprises a variable displacement pump. The hydraulic system includes a first device capable of being hydraulically powered by the pump and a reversing device adapted to cause the first device to autoreverse. The hydraulic system also includes an isolation device adapted to prevent pressure surges resulting from a source other than the first device from actuating the reversing device, thereby preventing undesirable autoreversing of the first device.

Abstract: A fluid reservoir system (10) for a master cylinder (12) having first and second fluid chambers each with associated pistons, the system comprising a main reservoir (16); a first secondary reservoir (18) for mounting on the master cylinder to supply fluid to the first fluid chamber; a second secondary reservoir (18) for mounting on the master cylinder to supply fluid to the second fluid chamber; a first fluid pipe (22) fluidly connecting the main reservoir with the first secondary reservoir; and a second fluid pipe (24) fluidly connecting the main reservoir with the second secondary reservoir; wherein the first secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the first fluid chamber during full stroke of the associated master cylinder piston; and wherein the second secondary reservoir has a fluid capacity which is substantially equal to, or greater than, the capacity of fluid required by the second fluid chamber during full stroke of

Abstract: The invention relates to a piston for a hydraulic control device for a clutch, especially the clutch of an automobile, having a tubular metal sleeve with an internal transversal wall which is integral with the tubular body of the sleeve. A hydraulic chamber is defined towards the front of the sleeve where the piston is mounted so as to slide axially.

Abstract: A fan blade frame provides a suitable connection for securely connecting a fan blade to a conventional blade iron. A first frame member generally defines the outer periphery of the fan blade. A plate is fixedly attached to the base end of the first frame member, and may additionally attached to a second frame member that is connected to the base end of the first frame member. The plate and first frame member form a rigid unit that provides support to a light-weight or non-rigid blade material such as wicker, natural leaf, cloth, etc. The plate defines a plurality of openings therethrough for connection to a conventional fan blade iron.

Abstract: In a proportional booster valve V, a primary reaction piston 37 and a secondary reaction piston 38 are provided between a control piston 23 which faces at one end thereof toward a control pressure chamber 25 into which hydraulic pressure outputted from a primary master cylinder is inputted a boost pressure chambers 44 connected to secondary master cylinders, the primary reaction piston 37 being adapted to transmit at all times to the control piston 23 a reaction force corresponding to hydraulic pressure of the boost pressure chamber 44, the secondary reaction piston 38 being adapted to transmit to the control piston 23 a reaction force corresponding to the hydraulic pressure of the boost pressure chamber 44 as the hydraulic pressure of the boost pressure chamber 44 exceeds a set hydraulic pressure.

Abstract: A brake system including an intensifying arrangement which allows a master cylinder pressure to be intensified by feeding a discharge pressure from a pump to an intensifying chamber. The brake system includes a master cylinder having a primary piston, on the rear portion of which a sleeve is fitted, with a spool valve slidably fitted into the sleeve. The spool valve has a rear end which abuts against the bottom of a bottomed opening formed in an input shaft. The invention allows a misalignment between the axes of the primary piston and the input shaft.

Abstract: An impingement insert sleeve is provided that is adapted to be disposed in a coolant cavity defined through a stator vane. The insert has a generally open inlet end and first and second diametrically opposed, perforated side walls. A metering plate having at least one opening defined therethrough for coolant flow is mounted to the side walls to generally transverse a longitudinal axis of the insert, and is disposed downstream from said inlet end. The metering plate improves flow distribution while reducing ballooning stresses within the insert and allowing for a more flexible insert attachment.

Abstract: A method for cooling the flow in radial gaps formed between rotors and stators of turbomachines, which method is improved with regard to its cooling effect. In addition, a simple, cost-effective and robust arrangement for realizing the method is to be specified. According to the invention, this is achieved in that a first cooling fluid is admitted to a stator part adjacent to the radial gap and a second, gaseous cooling fluid is introduced into the radial gap. To this end, either at least one recess is formed in the interior of the stator part adjacent to the radial gap or at least one cavity is arranged at the stator part. The recess or the cavity is connected to both a feed line and a discharge line for the first cooling fluid. In addition, at least one feed passage as well as a discharge device for the second cooling fluid are arranged at the radial gap.

Abstract: At least one adjustable restricting point is introduced into the cooling air path of a coolable gas turbine component, and means which make it possible to change this restricting point during the operation of the machine are provided. In this way it is possible to adapt the amount of cooling air fed to the component continuously to the specific operating conditions.

Abstract: A rotor assembly for a gas turbine engine including a bearing centering sub-assembly that facilitates reduces radial forces transmitted to a bearing assembly is described. The bearing assembly supports a rotor shaft with a rolling element positioned radially inward from an outer race. The bearing centering sub-assembly is coupled to the outer race and includes a plurality of first springs and second springs arranged circumferentially in a row. Each first spring is positioned between adjacent second springs and coupled between the outer race and annular ring. Each second spring is coupled between a support frame and the annular ring.

Abstract: To provide an axial fan of a high performance at a low cost and with a high fan efficiency. An axial fan comprising a frusto-conical ring disposed on the downstream side of the fan. The frusto-conical ring is so mounted integrally with a fan boss on the open end portion on the trailing edge side of fan blades of the fan boss that it may not protrude from the trailing edges of the fan blades. In this frusto-conical ring, the taper angle, the external diameter and the mounting depth are set to such optimum values that the air flow having passed through the fan may neither separate nor flow backward.

Abstract: A hydraulic control device for a motor vehicle clutch, comprising at least a control cylinder (10) wherein the cylinder (10) comprises a substantially tubular cylinder body (17) wherein a piston (20) slides axially defining a cylindrical hydraulic chamber (16), wherein the cylinder body (17) comprises a main body (18) and a rear tube (50) guiding the piston (22). The rear tube (50) and the main body (18) co-operate through matching cylindrical surfaces to enable the rear tube (50) and the main body (18) to be assembled by axial nesting and laser welding.

Abstract: The invention relates to a device (10) comprising a cylinder body (17) in an inner bore hole (22) in which a piston (21, 42) is mounted in such a way that it can slide axially, whereby the cylinder body (17) comprises at least one part in the front of the blind hole (17a) and one center part bearing a sealing joint, whereby both parts are fitted axially and consecutively from front to back and are interfixed in a sealed manner. Said inner bore hole comprises two front and rear sections which are substantially coaxial and concentric and are used to guide the piston (21,42) in an axially sliding manner. The invention is characterized in that both front (62) and rear (60) sections which are used to guide the piston (21,42) in a sliding manner belong to the center part (17B,64) of the cylinder body.

Abstract: A wind-generated power system for producing supplemental electrical power from wind-producing resource. The wind-generated power system includes a subway system tunnel having a wall and support structure with wind being generated by subway trains passing or traveling at high rates of speed therethrough; and also includes wind-collecting ducts being spaced throughout the subway system tunnel and being attached to the wall and support structure; and further includes shrouds being mounted to the wall and support structure and being connected to the wind-collecting ducts; and also includes turbine generators being mounted in the shrouds and being adapted to transform wind to electrical power.

Abstract: A hydraulic axial piston machine (1) includes a cylinder drum (3) having at least one cylinder (4) in which a piston (5) is arranged to be reciprocating, an inclined swash plate (8), on which the piston (5) is supported via a slide shoe (7), a pressure plate (9) maintaining the bearing of the slide shoe (7) on the swash plate (8), and a spring arrangement (10) by means of which the pressure plate (9) is pressed against the swash plate (8) via the cylinder drum (3). In the past, the pressure plate has been supported on the cylinder drum (3) via a ball joint, with the spring arrangement and a driving shaft for the cylinder drum penetrating the cylinder drum. The ball joint is expensive and exposed to wear. According to the invention, the spring arrangement (10) bears immediately on the pressure plate (9). Thus, a ball joint and the wear of it will be avoided.

Abstract: The present invention is an improved secure coupling for vehicle brake actuator units that allows for a stronger and more efficient units having the same or smaller overall profile. The coupling is used between the housing cup of either a service brake actuator or an emergency brake actuator, or both, and a corresponding adaptor where the housing cup(s) and adaptor are made of dissimilar metals. In the coupling, the cylindrical wall of the housing cup is substantially vertical, and the corresponding annular edges of the adaptor cup are provided with a uniquely shaped engagement structure. This structure allows the edges of the elastomeric diaphragm deployed in the actuator to extend away from the coupling at a substantially vertical angle, making available more surface area of the diaphragm to press against a pressure-transmitting plate inside. This allows the brake actuator unit to transmit more force, and/or to employ a stronger emergency brake spring, without increasing the size of the unit.

Abstract: A spring brake actuator having a flange case and a head is provided. The flange case includes a radially outwardly extending annular flange, and the head includes a shoulder and a collar extending therefrom. The collar includes a plurality of radially spaced apart slots defining a plurality of radially spaced apart tabs, each of the tabs having a hook portion projecting radially inwardly, and each of the tabs being elastically deformable radially outwardly. In an assembled position, when the head is attached to the flange case, the annular flange of the flange case is received by the collar of the head and the hook portions of the tabs engage a lower surface of the annular flange so as to inhibit separation of the head from the flange case.

Abstract: The present invention is concerned with a work machine having a telescopic arm coupled to the front thereof. This arm is used for seating various sorts of frontal attachments and is raised and lowered by means of a hydraulic piston-cylinder unit. Now in order to ensure that an installed frontal attachment always rests on the ground with a pre-selected force, use is made of a pilot controlled seat valve and an adjustable pressure regulating valve which ensure that a constant pressure is maintained in the cylinder chamber formed below the base of the piston in the piston-cylinder unit when a constant supply of oil is fed to this part of the cylinder chamber. In consequence, this means that the installed frontal attachment always rests on the ground with one and the same force independently of whether the ground is flat or uneven. The frontal attachment thus precisely copies the contour of the ground at all times.

Abstract: A jack has a first oil cylinder, an inner cylinder disposed in the first oil cylinder, an upper cover covering the first oil cylinder and the inner cylinder, a piston and a piston rod inserted in the inner cylinder, the piston connected to the piston rod, the piston rod passing through the upper cover, an extended plate extending from the upper cover, a collar disposed on a bottom of the extended plate, a second oil cylinder inserted through the collar, the second oil cylinder having a lower enlarged neck, a push rod inserted through the second oil cylinder, an arm plate connected to the collar, a retainer connected to the push rod, a lever fastening a connector and the retainer together, and a handle rod connected to the connector. The connector has a slot for receiving the arm plate. A pivot pin fastens the connector and the are plate together.