Abstract: A power cylinder of a hydraulic percussion implement, in whose bore a ram with an enlarged piston head is vertically reciprocable to strike a tool at the lower end of the bore, has a control chamber above the piston head alternately communicating with the high-pressure side and the low-pressure side of a source of hydraulic fluid, an annular recess in the bore being permanently or intermittently connected to high pressure acting upon the underside of the piston head. An annular drainage chamber formed by the bore at a lower level, disposed above an oil seal, collects liquid leaking down from that recess and returns it to the source. A pneumatic buffer lies in or communicates with that drainage chamber for absorbing hydraulic shocks generated when the ram strikes the tool.

Abstract: A fluid-powered, rotary actuated support, including an elongated cylindrical body having ports for introducing pressurized fluid therein; a platform concentric with the cylindrical body and rotatable relative thereto; a radially extending bearing support joined to the cylindrical body and confronting the platform; bearings disposed between the bearing support and the platform for allowing relative rotational movement between the platform and the bearing support, with one of the platform or bearing support being subjected to bending loads disposed in a generally vertical plane from the weight of a crane or other device and its load; a longitudinally splined output shaft rotatably disposed within the body and having a drive end for providing rotational drive between the body and the platform, the splines being loosely fitted to the platform for substantially isolating the shaft from non-rotational movement of the platform, the shaft being bearingless and radially floating within the body for transferring rotati

Abstract: A reciprocating engine, in particular for motor vehicles, incorporating a drive shaft, at least one pair of opposed pistons rigidly connected together by a rod, and a swash plate mechanism incorporating a pair of rotating swash plates coupled for rotation with the drive shaft and defining an annular cavity in which at least one oscillating plate is rotatably housed. Coupling means pivotally connect each oscillating plate with at least one respective rod connecting a pair of pistons, and a hydrodynamic thrust bearing is interposed between each of the two rotating plates and the facing surface of the oscillating plate.

Abstract: A plastic compensating reservoir for hydraulic brake systems, such as for brake systems of automotive vehicles, is provided with two interconnected brake fluid chambers which are in communication each other over one port for connection to each one pressure chamber of a tandem master cylinder. To enable manufacture of a like compensating reservoir by one single injection molding process, there is provided a tube which extends transversely to the reservoir's vertical axis and which projects from one of the brake fluid chambers, the said projecting end being adapted to be closed.

Abstract: A master cylinder of resin material includes a cylinder having a receiving portion within which a piston is sealingly slidable, a cylindrical portion having a diameter which is larger than that of an outer periphery of the cylinder and coaxially rearwardly extending from the fore part of the receiving portion, and mounting flanges radially extending from a rearward end of the cylindrical portion. Each of the cylinder, the cylindrical portion and the mounting flanges are integrally formed.

Abstract: An applied pressure or volume change is intrinsically transformed into an output pressure or volume change which is related to the magnitude of the relative input quantity and a ratio of effective areas of pressure application surfaces of a plurality of pistons in a fluidic transformer. The surfaces of the pistons are interconnected by fluid communication paths in a predetermined manner such that pressures existing in each of the communication paths relate only to the input pressure relative to the reference pressure and a ratio of the effective surface areas of the pistons, and such that the pistons are in a balanced force equilibrium state. The pressures present in the communication paths can be operatively applied on opposite sides of fluid sealing elements of a plurality of sealing elements arranged in serial order to operatively seal between the applied pressure and the reference pressure.

Abstract: A compensation control and blow-off valve unit in a quick take-up master cylinder. In one embodiment, a stamped valve body forms a valve member within a valve chamber which permits compensation flow from the master cylinder reservoir to the pressurizing chambers. It has an O-ring seal controlling a passage from the valve chamber to the reservoir which opens the passage at a predetermined quick take-up pressure to return fluid to the reservoir. Other embodiments use an umbrella valve or a spring biased ball check valve. The valve housing in some embodiments also retains the reservoir housing in sealed position on the master cylinder housing.

Abstract: A stationary pressure bleed stem and a movable pressure bleed stem are mounted on a base plate to adjust for varied spacing between the master cylinder ports at the reservoir bottom. The fixture is clamped over the master cylinder reservoir. The stems may be interchangeable with other similar stems of various dimensions to accommodate for variations in dimensions of different master cylinders. The device simplifies and expedites pressure bleeding of master cylinders having different configurations.

Abstract: In a hydrostatic transmission of the type in which a motor and a variable displacement pump are coupled within a casing, both the motor and the pump are of the radial displacement type and each includes two oppositely phased reaction surfaces, so as to enable improved dynamic balance and a simpler and more robust construction. An engine starting function may also be provided.

Abstract: A core blank made of a material lighter than that of the piston is placed into a blind hollow of a barrel-shaped piston blank. The composite blank of the piston, thus formed, is subjected to a direct cold straight-through extrusion through a die. A piston is produced wherein the entire surface of the core is congruent with the internal surface of the piston and is in a clearanceless preloaded contact therewith.

Abstract: A brake booster is operated both by braking actuated by a brake pedal and by a solenoid. A moving core of the solenoid and a relay valve piston of the brake booster are linked by a balance lever, and the moving core of the solenoid has a much larger mobility than the relay valve piston during braking because the fulcrum of the lever is positioned nearer to the relay valve piston to enable the solenoid to be miniaturized. When the solenoid is actuated, the moving core requires much more time to move than to return. In an automobile equipped with this brake booster, the braking force can be increased gently but interrupted quickly during braking actuated by the solenoid.

Abstract: A master cylinder for hydraulically actuated brakes for automotive vehicles includes at least one master cylinder piston with a piston return spring anchored by a central clamping member and a valve body which is slidable relative to the master cylinder piston and which opens a compensating port in the master cylinder piston when the return spring is relieved. The valve body carries an elastic sealing element at its end face close to the compensating port. The outer diameter of the elastic sealing element is greater than the diameter of the compensating port. A pin shaped on the valve body extends through the sealing element and is adapted to plunge into the compensating port on approach of the valve body to the piston end surface which surrounds the compensating port, thus preventing the sealing element from penetrating into the compensating port.

Abstract: Fluid actuator includes a lock mechanism for releasably locking the actuator against movement, and a lock release assembly including a lock piston engageable with a toggle linkage upon application of fluid pressure to the lock piston to release the lock mechanism. The toggle linkage is fixedly mounted on a rotatable cross shaft which may also be manually rotated by manual rotation of an external lock release lever attached to one end of the cross shaft for effecting manual release of the lock mechanism. The engaged or disengaged condition of the lock mechanism may be sensed electrically as by providing a target on the external lock release lever for movement therewith toward and away from a proximity switch.

Abstract: A hydraulic dual-circuit brake booster in which two brake circuits are closed brake circuits. A dual-circuit tandem main cylinder is used in combination with a pedal push rod supported in a displaceable piston and exposed to the brake pressure directed into the system by the control valve. The pedal push rod and the tandem main brake cylinder are disposed coaxially and the brake booster is particularly suitable for use with anti-skid brake systems.

Abstract: A tandem brake master cylinder which includes a single inlet union having two inlet union portions which are connected to each other as a single, unitary body via a connecting portion, the connecting portion having at approximately a central portion thereof a mounting portion which projects toward a cylinder body and which has an insertion hole formed therein. The distance between each inlet union and a common mounting screw may be double that as compared with the distance between the inlet union and its associated mounting screw in conventional master cylinders and therefore the play of the inlet union portions may be greatly reduced.

Abstract: An oscillating coolant pump includes a pair of opposed bellows mounted to reciprocate in a housing for moving a volume of fluid through a heat exchanger and an electronics package. The pump functions without the use of check valves.

Abstract: A hydraulic fluid reservoir for automobile including a plurality of fluid chambers separated by a partition, the fluid chambers being communicated with hydraulic systems in the automobile respectively, and a baffle plate between the upper end of the partition and an inlet at the upper portion of a reservoir body to define openings of the respective fluid chambers at predetermined ratios which define the flow rates of fluid into respective fluid chambers.

Abstract: A rodless cylinder having a piston and an operation member slidable along the outer circumferential surface of a cylinder tube, each mounted with permanent magnets, and adapted to move the operation member along the cylinder tube by utilizing the attraction force between these permanent magnets, in which a plurality of individual magnets disposed axially to the cylinder in each of driving and driven magnet rows are arranged such that identical poles of the individual magnets are in adjacent to each other, and both of the driving and driven magnet rows are arranged such that the different poles of the individual magnets in each of the magnet rows are opposed to each other can provide a greater attraction force between the magnet rows with no changes in the size of the magnet and thereby reduce the size of the entire apparatus.

Abstract: A brake actuation assembly (10) wherein a front shell (50) of a booster mechanism (14) is attached to a stationary bulkhead (32) and the housing (58) of a master cylinder (12). On actuation of the booster mechanism (14) an output force is produced to operate the master cylinder (12). The operation of the master cylinder (12) develops a corresponding reaction force which is directly transferred into the stationary bulkhead (22) to substantially eliminate any axial deformation in the rear shell (20) of the booster mechanism (14).

Abstract: A hydraulic fluid reservoir for automobile including a partition wall within a reservoir casing defining a float chamber and extending from the bottom of the reservoir casing, a float which is movable in said float chamber so as to cause a switch to close or open at a predetermined float level, a communication opening communicating the float chamber with the outside chamber of the partition wall at the lower portion thereof and a fluid reflection cover disposed on the float chamber, malfunction of the level detector is avoided.