Abstract: A fluid energized double acting motor is provided for use as the drive for reciprocating mechanisms such as paint pumps for airless spray painting. A piston within the pump housing is moved by pressurized fluid controlled by an automatic reversing valve including spaced check valves. The check valves are selectively seated and unseated by a spring biased piston and fluid pressure controlled valve actuator assembly. The reversing valve system includes anti-stalling features and is of single, low cost, field repairable nature. The motor system also includes features to prevent chattering oscillation due to abrupt changes in motor load.

Abstract: A control device for a hydrostatic drive for at least two actuators, having a variable displacement pump whose adjusting device is acted on in accordance with the displacement and/or the flow pressure, wherein each actuator has associated with it, in its hydraulic supply line, a control valve and a preceding displacement controller in the form of a pressure compensator, is simplified while ensuring accurate control. This is achieved by associating with the control device an electronic regulating device which, depending on a measuring element that detects the opening position of the pressure compensator, controls, by means of an adjusting member associated with the adjusting device, the displacement setting of the pump, increasing it as the opening of the pressure compensator(s) becomes larger and decreasing as the opening becomes smaller.

Abstract: A hydraulic device includes a piston slidable within a cylinder. Fluid under pressure is admitted to one end of the cylinder through an inlet which contains a restrictor. The piston is formed with an orifice and is biased by a first spring towards the one end of the cylinder. A thrust rod is engageable by the piston to transmit the movement of the piston to an external mechanism. When the piston is moved by rising fluid pressure the orifice is closed by the end of the thrust rod so that a higher value of fluid pressure is required to effect the initial movement of the piston than is required to allow the return movement of the piston.

Abstract: An end cap for a fluid cylinder having a central body portion and opposite end portions, flexible annular lips on the opposite end portions, an annular barb on one of the end portions for mating engagement with a groove with a cylinder for retaining the end cap in position, and an enlarged protuberance on the other annular portion of a diameter greater than the internal diameter of the cylinder for providing an interference fit therewith.

Abstract: A one moving part, bi-directional rotary displacement mechanism for conveying rotational movement about an axis to movable members in flight vehicles. In consists of an enclosure having bi-directional rotation capability, encapsulating a vane with bi-directional ducts venting from its load bearing surfaces. The vane is affixed to a bi-directionally ducted shaft, having bi-direcitonal rotation capability, extending through the center and outside of the enclosure. A conically shaped, sealed, positive stop, with load bearing surfaces, eminating from the inside radius of the housing, points toward the horizontal axis, supports the shaft and facilitates axial rotation. The vane has a radius concentric with the inside radius of the enclosure and allows sealed bi-directional rotary movement between the two surfaces. Two sealed cavities exist between the load bearing surfaces of the vane and the positive stop. Pressure to and from the cavities flows through the joined vane and shaft ducting.

Abstract: A control device for a hydrostatic drive for at least two actuators having a variable displacement pump whose adjusting device can be acted on as a function of the displacement and/or of the delivery pressure, wherein a control valve is associated with each actuator in its hydraulic supply line and the delivery flow for each actuator is determined by means of a pressure compensator as a function of the valve preset at the control valve, is simplified while ensuring accurate control. This is achieved by having the adjusting device always set the pump at a displacement which is slightly less than the sum of the actual instantaneous volume flows required by the actuators.

Abstract: A reaction mechanism for brake booster is disclosed. The end face of one end of an output shaft is formed with a recess in which a reaction disc is received. Part of the reaction disc and a valve body include projections extending into the other to establish a tight contact between part of the reaction disc and the valve body, which region is effective to achieve a hermetic seal in a reliable manner.

Abstract: A fluid controller (17) is disclosed for controlling the flow of fluid to a steering cylinder (19). The controller includes a fluid meter (51) and a valving arrangement (49) including a valve spool (65) and a sleeve (67), which define a main fluid path including a main variable flow control orifice (121), the fluid meter (51), a variable flow control orifice (123), the steering cylinder (19), and a variable flow control orifice (125). In accordance with the invention, the spool and sleeve define an amplification fluid path including a variable amplification orifice (129) in parallel with the main fluid path, and disposed to amplify the flow of fluid through the meter. In one embodiment of the invention, the amplification fluid path communicates with the main fluid path upstream of the main variable flow control orifice, and at a location downstream of the fluid meter, but upstream of the variable flow control orifice (123).

Abstract: For setting and guiding a band running round two rolls the bearings of the roll on either side are each adjustable by a hydraulic or lifting cylinder. Each hydraulic cylinder comprises a position control circuit. The position desired value applied jointly to the position control circuits is varied by a tension-dependent control in such a manner that in the position adjustment a maximum admissible tension force is not exceeded. Furthermore, the position desired value has superimposed thereon a correction control by which the center setting of the band is monitored. The arrangement is preferably provided for positioning and tension-dependent adjustment of the encircling metal band of a sheet casting apparatus.

Abstract: A brake valve for brake boosters in which a slide is guided in a sheath that is supported in rounded fashion at one end face, such that the slide, along with the sheath, is pivotable and can center itself, with a bezel formed onto its end face, in the valve seat of a valve bushing. The slide and valve bushing form a valve in which the closing behavior is improved considerably by the automatic centering of the slide in the valve seat.

Abstract: A brake booster having a brake valve disposed inside a booster piston, the brake valve comprises a valve bushing including a valve seat and a slide that is pressed by a spring against the valve seat of the valve bushing. The slide is supported with play at a great distance from the valve seat, so that it can be pivoted slightly around the vicinity of its bearing. The pivotability of the slide facilitates its centering in the valve seat, so that the valve closes dependably even in the presence of bearing tolerances or valve seat tolerances. Seals required for sealing off the slide have an elastic behavior, and are disposed in the vicinity of the bearing. As a result, reliable sealing is assured despite the pivotability of the slide.

Abstract: A steering control valve for a power steering system for a vehicle includes a valve structure which defines a plurality of variable flow orifices as steering input torque is applied thereby creating pressure differential acting on fluid motor. A solenoid operated variable flow orifice valve is operable in response to a control factor, such as vehicle speed, other than the steering input torque defines a variable flow orifice connected in series with one of the plurality of variable flow orifices.

Abstract: A stroke variable device comprising a large diameter cylinder and a small diameter cylinder which are interconnected to each other. A large diameter piston and a small diameter piston are slidably inserted into the large diameter cylinder and the small diameter cylinder, respectively, and a cylinder chamber is formed between the inner end of the large diameter piston and the inner end of the small diameter piston. A first seal member is arranged to surround the projecting outer end of the large diameter piston, and a second seal member is arranged to surround the projecting outer end of the small diameter piston. One end of the first seal member is fixed to the projecting outer end of the large diameter piston, and the other end thereof is fixed to the housing of the device to form a first hermetically sealed chamber therein.

Abstract: The hydraulic booster device controls a ball valve (25) to establish a communication between a source of fluid at high pressure (35) and a braking circuit (29) during a normal braking. In the event of failure of the high pressure source (35), the braking is ensured by pressurizing of the fluid contained in a chamber (33) by a piston mechanism (20), and transfer of this fluid into the circuit (29). An additional useful volume of brake fluid is supplied to the circuit (29) by fluid expelled from the chamber (11) by the penetration of the plunger (5) into this chamber, after the piston mechanism (20) has come to a stop against the end fitting (3). Application to a hydraulic braking circuit for automobile vehicle.

Abstract: A hydraulic cylinder and the method of making such hydraulic cylinder of a tubular sleeve and a housing of dissimilar material cast or molded around the sleeve. The sleeve is provided at least at one end with a portion projecting into the material of the housing, such projection being preferably in the form of an annular bead with a corresponding internally disposed groove. The other end of the sleeve has an internally radially projecting flange projecting into the material of the housing, and the elastomeric O-ring is disposed at the junction between the internal surface of the flange and the surface of the sleeve bore to provide a seal for the pressure end of the cylinder.

Abstract: A booster, for use as an automotive brake booster is disclosed which works quickly at the beginning of an operation sequence. The booster has a housing with a piston capable of sliding in the opening of the housing and acting on a diaphragm dividing the inside of the housing into a constant pressure chamber and a variable pressure chamber. An output rod is provided having a rear end portion inserted in the power piston. A reaction disk is mounted between the output rod and the power piston with a retainer mounted on the power piston on the side of the constant pressure chamber. The retainer prevents the output rod from coming off and also causes the output rod to push the reaction plate toward the piston.

Abstract: A pull-type booster includes a hollow body in which a movable wall is movably received to divide an interior thereof into a negative pressure chamber and a pressure-variable chamber. The movable wall has a tubular portion extending outwardly of the body and having an axial internal bore. The tubular portion is disposed in a room or chamber. A tubular cover member is mounted around the tubular portion to cover it and has an inlet in communication with the internal bore. An air tube has one end connected to the inlet, and the other end of the air tube is disposed outside of the room.

Abstract: In a spool valve for thick matter pumps comprising at least one slide rod running forward and backward which is movable in a guide means and surrounded by a seal, and a drive consisting of working pistons associated with each slide rod, the working pistons each cooperating with one end of the slide rod directed out of a valve casing, and their driving cylinders ending a distance away from the valve casing, the end of the slide rod which runs forward out of the casing being cleaned of adhering thick matter during the backward movement of the piston, the invention provides for the guide means to be disposed on the inside and the seal separate therefrom to be disposed on the outside in front thereof on the valve casing, and for the parts supported loosely on each other in the operative connection between the working piston and the end of the slide rod to provide a gap which is used for assembling and dismounting the seal, the cleaning of the end of the slide rod being effected by the stripping action of the seal

Abstract: A carrier bracket for use with a power cylinder of the type having an elongated cylinder member and a reciprocally movable piston therein for transferring reciprocal movement of the piston to a desired workpiece. The carrer bracket includes a central bracket portion, a pair of guide arms extending outwardly from the central bracket portion in which each of the guide arms is provided with elongated surface, a mechanism to permit limited flexing movement of the arms relative to the central bracket so as to facilitate the limited selective movement of the arms toward and away from one another and a device for causing the limited selective movement of the arms toward and away from one another.

Abstract: A power assist steering system comprises a control valve which defines a fluid flow distributor circuit which includes two parallel first and second fluid flow paths connected between the hydraulic fluid source and the fluid reservoir. Inflow control variable flow orifices are arranged in series with two auxiliary variable flow orifices, respectively, which are disposed downstream with regard to the power cylinder, and the outflow control variable flow orifices are arranged in series with another two auxiliary variable flow orifices which are disposed downstream with regard to the power cylinder.