Abstract: A master cylinder (10) having a sleeve (24) for positioning first (22) and second (30) seal members within a bore (14) of the housing (12). The first (22) and second (30) members each have a primary seal (52), a retainer (58) and secondary seals (54 or 55). The primary seals (52) have a base member (60), a peripheral ring (64) and a flexible bellows section (66). The retainers (56) have a groove (70) for holding the base member (60), radial slots (74, 74') connect to a source of fluid and either a rib (100) or projection (94) for positioning the secondary seals (54 or 56). First (38) and second (40) pistons which engage the first (30) and second (22) seal members, have communication passages (80, 82) through which the radial slots (74, 74') (75, 75' ) are connected to first (46) and second (42) chamber.

Abstract: A load self-leveling system for a vehicle utilizing hydraulic cylinders to operate a telescopic lifting boom and a material handling carriage. The system includes a pair of fluid flow dividers interposed between the source of hydraulic fluid under pressure and the hydraulic cylinders operating the boom and carriage. The flow dividers are structured to direct a greater flow of hydraulic fluid to the boom cylinder and a lesser flow to the carriage cylinder, the precise numeric proportions of flow division being engineered to best suit a particular vehicle, combined with the specific componentry of that vehicle. In addition to the flow dividers, the system includes reversible flow piloted check valves, override control including override relief valves to allow independent adjustments, and matched cylinder area ratios. A compact assembly housing various of the components comprising the system is disclosed.

Abstract: A variable-stroke, constant-compression, reversible radial pump, the stroke of which may be infinitely adjusted by means of a variable-throw eccentric from a normal-cycle maximum through zero to a reverse-cycle maximum, and the compression of which is maintained constant through the use of a variable-geometry cylinder-head assembly. The cylinder geometry varies when the cylinder head is raised and lowered by means of a synchronized screw arrangement which is coupled through a gear set to the variable-throw eccentric. The variable throw-eccentric comprises a hollow input shaft which is drilled and threaded diametrically. A threaded, splined adjustment shaft is screwed into the threaded diametric hole in the input shaft. Each end of the adjustment shaft is mounted in bearing races which are anchored at diametrically opposed points in a connecting-rod journal.

Abstract: A mechanical limit sensing device or limit switch for piston and cylinder actuators has a housing in which a rocking lever is pivoted so that its one end is moved by part of the actuator to be controlled. The other end works a switching element. The housing is made in two parts, that is to say on the one hand a bush or bearing sleeve and on the other hand a gripping or clamping body for the bush. The bush may be turned in the body and may be clamped in it in a given position. The lever has a ball-like part with which it is mounted in a socket in the bush. The lever is furthermore guided in a slot in the body. This slot furthermore divides part of the body into two jaws that are used for clamping the body onto the bush. The switching element is screwed into a hole in the body that is in the same plane as the slot. There is furthermore a blind hole in this plane to take up a plunger for returning the lever after being actuated.

Abstract: A fluid operated positioning apparatus includes a multi-position valve operated in response to differential pressure in a fluid control circuit. The control circuit includes two adjustable throttles in series, the junction between the throttles being connected to a control device at one end of the valve. Particular relationships for the throttles are disclosed. Other embodiments include additional throttles for improved control with low pressures.

Abstract: A valving mechanism for a cylinder-piston unit wherein the extreme positions of the piston are not positively controlled by a crankshaft or similar device. Inlet and exhaust valves are respectively mounted in a cylinder head and are operated by actuating rods projecting into the path of the piston.

Abstract: A master cylinder reservoir for use in a tractor hydraulic braking system has a pair of separate compartments, each adapted for connection to a respective one of a plurality of pressure cylinders. The compartments are interconnected by a flexible connector such as a convoluted tube, and the reservoir is advantageously made in a single piece by blow molding enabling the relative positions of the cylinders to vary so that the reservoir can be readily mounted by spigots engaging bores in the cylinders. The reservoir also has a flanged rigid tubular connection component molded into it during the reservoir molding operation, the material of the reservoir closely surrounding opposed surfaces of a flange of the component to resist longitudinal withdrawal of the component.

Abstract: Braking booster servomotor for actuating a master cylinder and comprising at least a rigid force transmitting stirrup member disposed about the two shells constituting the casing of the servomotor, the member also contributing to the closure of the casing.

Abstract: A master cylinder includes a cylinder of one-piece construction made of a synthetic resin and including a cylinder body having an axial internal bore therein. At least one mounting flange extends perpendicular to an axis of the cylinder body, the mounting flange being adapted to be secured to a support structure to mount the master cylinder thereon. A plurality of ribs are formed integrally with and extends radially outwardly from the outer peripheral surface of the cylinder body in circumferentially spaced relation, the ribs also extending along the axis of the cylinder body. The mounting flange is connected to radial outer ends of the ribs. A piston received in the internal bore for sliding movement therealong.

Abstract: A hydraulic power booster, for the actuation of a master cylinder in an automotive vehicle brake system, in which a booster piston and a brake valve are essentially arranged in parallel with the booster piston. In dependence on the actuation force applied to the brake system, a hydraulic pressure may be developed in a booster chamber which is essentially defined by a pedal-operable piston rod and by the booster piston. In order to supply at least the required absorption volume to the brake actuating devices without considerable reaction force at the brake pedal, the piston rod may be supported at the booster housing, against an actuating force. The booster piston is positively connected with the piston rod so as to enable a limited relative displacement between the booster piston and the piston rod.

Abstract: A rack-and-pinion steering gear structure for a vehicle including a rack housed within a cylinder and driven by means of a pinion shaft, comprises an annular piston received with suitable axial clearance in an annular groove defined by three surfaces, namely the end face of one end of the rack, a seating surface of a head of a bolt screwed into a boss projecting from the end of the rack, and the outer periphery of the boss itself. An elastic annular seal member is interposed between the inner periphery of the piston and the outer periphery of the boss.

Abstract: An improved booster for use with a master cylinder in a brake system is proposed which includes a spring for keeping the input shaft away from the booster piston. The spring has one end abutting on a piston acted by the auxiliary pressure from the auxiliary power source and the other end abutting on the brake pedal to bear the pedal stepping force. The input shaft will not engage the booster piston except in case of the failure of the auxiliary power source, ect.

Abstract: A re-chargeable self-contained servo cylinder for the control of force with variable piston positions under load includes an elongated cylinder housing having a tubular body with open receiver end and closed opposite end by a cap which includes a central port provided with integral directional check valve for supply of working fluid under pressure during cylinder charging, a piston and rod assembly slidably received inside the cylinder including a rod end closure with seals slipped over piston rod and secured inside the open receiver end so as to protrude an end portion of the piston rod for attaching to a load carrying platform, an integral flow control valve with control rod inside an elongated central bore of the piston rod for control of working fluid communication between the sides of the piston via a fluid opening provided therein when cylinder becomes pressurized by the working fluid and for maintaining a given piston position inside cylinder fixed when the flow control valve is closed thereby also fix

Abstract: A tire carcass transfer device (111) having a hollow housing (112) for receiving a tire carcass (160), a plurality of flexible cups (21) arranged in a circular band around the housing, vacuum means connected to the cups (21) and fluid powered actuators (10) for radial movement of the cups. The actuators (10) each have a return spring (24) therein to move piston (14) of the actuator (10) radially outwards by a predetermined amount on cessation of operation of the fluid powered actuator. Since all the pistons (14) are moved the same distance outwards by their respective springs (24), distortions to the carcass from its circular shape are minimized. An actuator (10) having a return spring (24) operating on a rod (15) operably connected to a piston (14) to return the actuator piston to a mid stroke position is also described.

Abstract: A supply tank for supplying fluid to a tandem master brake cylinder of a motor vehicle. The tank has a bottom section and a top section which is not shown. The bottom section comprises a partition wall which separates the two chambers from each other, the partition wall being formed with a passage which is arranged approximately in the center of the bottom section. In each chamber, an outlet is configured at each end of the bottom section. From each outlet and along the partition wall toward the middle of the bottom section, there extends one pipe which has an opening respective at its free end. The openings are positioned below the minimum admissible fluid level. The purpose achieved by the configuration of the pipes within the supply tank is that the effect of an inclination of the supply tank does not impair the efficiency of the hydraulic fluid and that, consequently, the outlets are supplied with hydraulic fluid at all times and in any condition.

Abstract: The brake booster (12) includes a housing (30) with at least one piston (38) disposed in a bore (32) to separate a pressure chamber (42) from a work chamber (76). The piston (38) engages a valve housing (79) containing therein a valve assembly (80) and the valve assembly (80) is connected to an input assembly (72) abutting the other end of the valve housing (79). The piston (38) is disposed within an extension (81) of the valve housing (79) and a seal (87) and spring (89) are disposed between the piston (38) and valve housing (79) so as to enhance initial movement of the piston (38) and provide a quick take-up and fast fill that compensates for fluid losses in the system while maintaining a reduced stroke for brake pedal travel.

Abstract: Improvement in a hydraulic control apparatus for actuating a remotely located mechanism having a shipping and installation restraining strap for an actuator having a housing and a linearly moveable output member projecting from the front end of the housing, the strap being non-elastic and rupturable and having a part thereof engageable with the free end of the output member and another part projecting rearwardly toward the rear end of the housing, the improvement comprising an elastic anchor arrangement for the restraining strap to allow full extension thereof without rupture thereof, a stop and positioning arrangement for the elastic anchor arrangement which predetermines the retracted position in which the output member is yieldably held, and an override arrangement to selectively debar functioning of the elastic anchor arrangement whenever it is intended to rupture the restraining strap.

Abstract: An improved sequence-and-relief valve comprises a housing (60), a plurality of conduits (42/44, 46, 53) opening into a bore (62) within the housing, a valve cartridge (64) with the bore, the valve cartridge having a central bore (66) in which a valve element (76) may be moved into and out of contact with seat (74) to control flow from a cylinder port (70) to a tank port (72) in response to changes in pressure acting at pump port (68) or at cylinder port (70). See FIG. 2.

Abstract: A linear motion transfer apparatus has a longitudinally slit elongated tubular structure (1) closed at its ends, in which a force accepting element (4) driven in the axial direction is guided in a longitudinally displaceable manner, and the longitudinal slit (10) of which is sealed off at both ends of the force accepting element by an inner flexible sealing element (27), which is guided underneath a force transfer element (11) protruding to the outside through the longitudinal slit and connected to the force accepting element (11), and with which a flexible covering element (30) is associated. The force transfer element (11) is longitudinally guided, by means of a ball-like guide element (17) partially encompassing the tubular structure (10), on at least two parallel guide tracks (16), which are disposed on both sides of the longitudinal slit (10) directly on the outside of the tubular structure (1).

Abstract: A first turbine rotor hub 32 and a second turbine rotor hub 42 each have respective internal splines 52, 62 which engage coaxial, non-concentric external splines 54, 64 on a shaft 20 and are in thrust bearing relationship. The assembly requires no bolts between the rotor stages 30 and 40 to hold the two stages together. In another embodiment the turbine stages 30, 40 are part of a turbine module 5 which includes a stator assembly 94.