Abstract: A reversible spring return cylinder actuator having a pair of piston rods extending from a common spring load piston to the exterior of the housing. In a non-pressure position of the piston, one of the piston rods extends further from the housing than the other. Either piston rod and either end of the housing can be mounted to a device to be actuated so that the same actuator can be used to define a non-pressure extend or retracted actuator without disassembly of the actuator.

Abstract: A vacuum-type brake booster device for automotive use having a shape such that the mounting of the booster device and surrounding components inside the engine compartment of the vehicle is markedly eased. The shell of the booster device, and hence the diaphragm contained therein, has the shape in the plane of the diaphragm of a circle having a peripheral segment thereof removed. This causes the effective center of the diaphragm to be shifted from the center of the circle. The input and output shafts and the master cylinder are mounted on the shell aligned with the offset effective center of the diaphragm.

Abstract: A fluid motor actuator of the type in which an actuator member is moved in either one of two opposite directions from a rest position to an actuated position includes a fail-safe mechanism having compression springs coupled with the actuator member for compression of the compression springs in response to actuation of the actuator member in either of the two opposite directions for establishing a restoring force which, upon loss of motive power, will return the actuator member to the rest position and maintain the actuator member in the rest position pending restoration of motive power.

Abstract: A hydraulic booster includes a power piston which is inserted slidably into a cylinder member and has a tip portion which is coupled to a piston of a master cylinder, a pressure chamber disposed in the rear of the power piston, a return valve provided in such a manner as to open and close a channel for connecting the pressure chamber to a reservoir, and a supply valve disposed in such a manner as to connect the pressure chamber to a high-pressure fluid source, a high-pressure fluid being introduced into the pressure chamber as the return valve is closed and the supply valve is opened. A valve sleeve is slidably inserted in the power piston and is urged rearwardly of the power piston by a spring, and a cam portion provided in the valve sleeve is employed to open and close the supply valve.

Abstract: Fluid actuator includes shear pins or threaded fasteners between a rod gland and a rod gland bearing which cause the rod gland bearing to separate from the rod gland in response to a predetermined jam clearance force being applied to the rod gland bearing upon engagement of a rod deformation either exteriorly or interiorly of the actuator with the rod gland bearing to clear such rod deformation. The shear pins or threaded fasteners are sized to withstand the usual internal pressures acting on the rod gland bearing. However, whenever a piston rod deformation engages the rod gland bearing, the entire actuator force is available to shear the shear pins or threaded fasteners which frees the rod gland bearing to allow movement of the rod gland bearing with the piston rod to clear the rod deformation. A single retainer plate may be used to retain both a plurality of headed shear pins and a retaining wire for the rod gland.

Abstract: 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 are assembled brake operating components and on the other side there are assembled hydraulic components. This module can be easily installed during assembly of the vehicle.

Abstract: A dual hydraulic motor system where motor wobblers are mechanically linked and the motor outputs are torque summed, is controlled by a three position dual valve assembly. Each valve assembly is controlled by pilot pistons that are mechanically linked to provide three functions, one being normal operation, a second where one motor must be shut-off and its load on the system is minimized and the third where both motors are shut-off and significant drag is then provided. These functions are implemented by a separate spool in each valve which has three independent stable positions.

Abstract: A pneumatic booster includes a casing, a diaphragm secured to the casing to partition the inside of the casing into a front chamber which is communicated with a negative-pressure source and a rear chamber, a valve body secured to the inner peripheral portion of the diaphragm, a vacuum valve provided in the valve body to allow the front and rear chambers to be selectively communicated with and cut off from each other, an atmospheric valve provided in the valve body to allow the rear chamber to be selectively communicated with and cut off from the atmosphere, an input rod for actuating the vacuum and atmospheric valves, and an output rod adapted to receive the force of displacement of the diaphragm. The atmospheric valve is composed of first and second valve portions provided in series along a communicating passage between the rear chamber and the atmosphere. The first and second valve portions are closed successively in the mentioned order when the atmospheric valve is closed.

Abstract: An interconnecting structure between a hub and a nut of a tandem brake booster is disclosed. The nut is formed with a plurality of recesses while the hub is formed with anti-rotation locks extending radially outward for engagement with the recesses to prevent a rotation of the nut relative to the hub, and also formed with stops extending radially inward for abutment against an end of a push rod which is received within the hub to prevent such end from being withdrawn from the hub.

Abstract: A pneumatic system (10) is shown in its most preferred use in a spray gun (12) to remotely control a pressure washer. The system (10) generally includes an integrally formed, homogenous squeeze box (40) including a location ear (52), a nose tube (46), a bellows (44), and a discharge tube (48). Bellows (44) is generally rectangular in cross section and includes a flat top (62) and bottom (63) and accordion sides (64) having generally longitudinal fold lines (72, 74, 76, 78, 80) which are generally parallel to the mold part line (93) and the tubes (46, 48) but include a 2.degree. draft for ease in mold removal. A valve and spring tube (42) is loosely received on the nose tube (46) for sealing a vent hole (60) provided therein when the bellows (44) is compressed by a trigger (30) of gun (12) and for biasing the trigger (30) to an uncompressed bellows condition.

Abstract: A hydraulic booster device comprises a booster cylinder coupled with a rear end of a cylinder body of a master cylinder, a booster piston slidably received in a piston guide mounted in the booster cylinder and spring-biased in a retreating direction, a valve piston connected to an operating member and slidably received in the booster piston, an output hydraulic pressure chamber defined to face a back of the booster piston, an input hydraulic pressure chamber leading to a hydraulic pressure supply source, an inlet valve interposed between the input and output hydraulic pressure chambers and opened in response to the advancing operation of the valve piston relative to the booster piston, an outlet valve interposed between the output hydraulic pressure chamber and an outlet chamber leading to an oil reservoir and closed in response to the advancing operation of the valve piston relative to the booster piston, and a booster chamber facing a back of the operating piston and defined between the operating piston and

Abstract: An improved pressure fluid cylinder of the type comprising a cylinder having a longitudinal slot through which a carrier element protrudes, the carrier element being connected to a piston which is movable in the cylinder. The slot is sealed by a sealing band and the piston is provided with a sealing cuff at each end. According to the invention the slot has a width which is greater on the outside of the cylinder than on the inside thereof.

Abstract: This invention relates to an air motor having a snap-acting overcentering spring mechanism for snapping the valving of the air motor between first and second positions as the piston completes each stroke in the cylinder to ensure reliable stall-free operation of the motor.

Abstract: A sport training apparatus for ball hitting games, such as golf, is provided with a frame which includes a base as well as a pair of uprights. A net is stretched across the uprights and has a pair of lower net corners which each are connected to a weight organized to ride along a rope inclined about 45.degree. from horizontal and spanning between the base and one of the uprights at a higher point. Displacement of the weights measures impact of the ball into the net. Each of the weights is connected by means of a cord to a marker movable on a rod fixed on a graduated ruler to provide a measure of the distance the ball would have traveled unimpededly. A differential between movements of the marks measures direction of the ball.

Abstract: Means for servo-controlling the position of a pneumatic actuator (14) comprise a circuit (20) for controlling a valve (10) for feeding the actuator, and a position sensor (30) and an acceleration sensor (34) which are associated with the moving member (16) of the actuator and which provide position and acceleration signals to the control circuit (20). The invention improves the stability and the accuracy with which the position of a pneumatic actuator is servo-controlled.

Abstract: A wire mounting structure for a vehicle cruise control has an upper plate 20a of a connector 20 formed with a through-hole 21a and a notch 22, and a lower plate 20b formed with an enlarged hole 21b for receiving the lower end of a rod 6b.

Abstract: A fluid actuator having a piston, a pair of springs, a pair of cams, and a pair of cam followers mounted in a housing. A normally open valve is coupled to the actuator output shaft for actuation. When fluid pressure is applied to the piston, the springs are compressed, and the cam followers are moved down to permit the cams to rotate away from each other, thereby reducing the force on the actuator output shaft and permitting the valve to open. When fluid pressure is removed from the piston, the springs expand pushing the piston and the cam followers up, thereby rotating the cams toward each other and forcing the actuator output shaft against the valve stem to close the valve.

Abstract: The structure comprises a molded plastics housing either having a metallic sleeve molded therein which forms a cylinder for a piston or defining the cylinder itself. An annular retainer for the piston is provided which abuts a location surface of the sleeve or an anchoring element molded in the housing. The location surface is provided by deforming the sleeve or anchoring element so that the location surface engages the annular retainer at a position radially inboard of its outer periphery.

Abstract: A vehicle steering for turning the steerable wheels of a vehicle having a fluid motor with a housing defining a fluid chamber and a piston in the chamber dividing the chamber into first and second chamber portions. A rotatable steering input member is supported by the housing. A rotatable follow-up member is associated with the piston and rotatable upon movement of the piston in the chamber. A valve controls pressurized fluid flow to the first and second chamber portions. The valve comprises first and second relatively movable valve parts. One of the valve parts is connected with the input member and the other of the valve parts is connected with the follow-up member forming a unit therewith. The unit has a surface against which fluid pressure in the first and second chamber portions acts tending to create an axial force on the unit. Pressure is applied to another surface area of the unit to balance the axial force acting on the unit.

Abstract: A double acting piston and cylinder air motor with pneumatically actuated pilot valves for shifting a directional control valve, where the pilot valves are controlled by pilot ports in the cylinder as they are uncovered by the piston.