Abstract: An activation component testing apparatus comprising an outer sleeve, an inner sleeve, a plunger, a number of bearings, and a compression spring. The outer sleeve forms an interior chamber having opposing first and second openings. The plunger, bearings, inner sleeve, and compression spring are disposed in the central cavity. The plunger includes a number of bearing recesses that engage the bearings such that the plunger is configured to transfer a compressive force applied to the activation component through the inner sleeve and compression spring to a load cell via the bearings when the plunger is in an extended position and urge the bearings out of engagement with the bearing recesses when the plunger is in a maximum force position such that the plunger cannot transfer additional compressive force to the load cell when the plunger is moved beyond the maximum force position.

Abstract: A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a central bore communicating with the inlet chamber; cylinder bores arrayed around the central bore; first feed passages interconnecting the inlet chamber and the cylinder bores, defining a bypass flowpath between the cylinder bores; and at least one discharge valve disposed at the second end which permits fluid flow from the cylinder bores to the discharge chamber but prevents opposite flow; Pistons are disposed in the bores. A shaft is coupled to the pistons so as to cause them to reciprocate through an axial pump stroke when the shaft is rotated. A mechanism is coupled to the cylinder block which modulates the axial position of the cylinder block within the housing, varying the size of the bypass flowpath.

Abstract: A pneumatic fastening tool assembly that employs an engine having a sliding sleeve arrangement to control the supply of air to and exhaust from the pneumatic engine. The sliding sleeve arrangement eliminates the need for a conventional main valve and thereby reduces the overall weight and length of the pneumatic fastening tool relative to those tools that employ a conventional engine configuration.

Abstract: A power cylinder (10) has two pistons (12, 20) slidably mounted within separate cylinders (14, 22) to define inner and outer chambers (16, 18; 24, 26) within each cylinder. One or more rods (28) are coupled between the pistons. The outer chambers (18, 26) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The inner chambers (16, 24) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The fluid flow aforesaid may be achieved by using two hollow rods (128, 130) and allowing the fluid to flow through the rods between the respective chambers. A guard (44) may surround first and second cylinders (14, 22). Bearings (46, 48) may be fixed around the opposed inner ends of cylinders (14, 22) to allow slidable displacement of the cylinders relative to guard (44).

Abstract: The actuator comprises a clutch pedal lever (12) which is pivotally connected to a support (17). The pedal is integral with a cylinder (18) having a piston (20) therein which is connected to a hollow pushrod (28). The pushrod is also pivotally connected to the mounting (17). Pivoting movement of the pedal (12) causes the cylinder (18) to move relative to the piston so that fluid within the cylinder will operate a slave cylinder (44). The clutch and pushrod have spaced axes of pivoting (13a, 14a) and the piston (20) is shaped to permit a degree of tilting to take place between the piston and the cylinder. The system also includes a reservoir which can communicate with the cylinder when the piston occupies a particular position in the cylinder.

Abstract: Apparatus operating by means of compressed air, comprising a displaceable cylinder, open at both ends, in which there bears a displaceable piston designed for expulsion of fixing elements fed forward below the piston. The cylinder and the piston are displaceable, by the action of air, in a cylinder housing between an upper and a lower end position at which are arranged damping elements. The cylinder and the piston bear with their respective and faces at their respective end positions against a surface of the damping element. The apparatus comprises an inlet and an outlet for the air, the flow of which is controlled by means of a valve, and an upper chamber and a lower chamber. These chambers are in connection with the inside of the cylinder by means of at least one opening in the cylinder wall. Furthermore, the apparatus comprises at least one second opening in the cylinder wall which is in connection with the outlet via a return channel depending on the position of the cylinder.

Abstract: A conveyorized transport apparatus has an overhead rail system for transporting articles on a suspended trolley from one location to another. A moveable rail section in the system has a pivotal connection with an adjacent rail section to pivot the moveable section from a conveying position and a diverted position in which articles are delivered closer to a work station disposed laterally of the rail system.

Abstract: The present invention concerns an apparatus for automatically eliminating a group of articles to be treated of which at least one is missing or defective in this group, this apparatus comprising essentially a detecting cell located above the articles or containers transported by a conveyor, a magazine for storing these containers located near the detecting cell, and pushers arranged vertically under the magazine and under the containers transported by the conveyor.

Abstract: A method and device for adjusting pressure fluid cylinders, the fluid being a compressible gas such as air and the cylinder being double-acting and receiving a piston (2). A force transmitting means (12, 20, 24) sensing the load of a cylinder generates a signal corresponding to the size of the load which signal is led to a pressure regulating means (17) adjusting the pressure in the cylinder (1) in dependence of the signal so that this will balance a force acting on the piston rod (3). The load-carrying piston (2) is then positioned in a stationary position relative to the cylinder (1).

Abstract: A variable height column having a base, a midsection and an upper section. The base includes at least one upwardly extending guide shaft and the upper section includes at least one downwardly extending guide shaft. The midsection includes guide paths and bearings dimensioned for sliding engagement with the guide shaft. Hydraulic actuating means are provided to move the midsection vertically relative to the base and to move the upper section vertically relative to the midsection at the same rate to permit the uniform straightline extension and retraction of the column.

Abstract: A cushioning device for use with a pneumatic impact tool which utilizes a part of compressed air for driving the piston of the tool as cushioning means and is self controllable.

Abstract: A cylinder (15) is reciprocable in the housing (11) of a hydraulic percussive tool and a piston hammer (16) is reciprocable in the cylinder. The force between the cylinder and the housing is constant during the cycle of reciprocation and as a result the housing (11) is practically not vibrating at all. The piston hammer (16) and the cylinder (15) are coupled together to move conjointly during a part of each forward stroke of the hammer piston, which ensures the timing of the reciprocation of the hammer piston 16 and the cylinder (15).

Abstract: A positive displacement pump includes a cylindrical housing which is divided in half by a partition. Each end of the housing lies proximate to an end plate to define peripheral inlet openings into each of said halves. Axial outlets and pistons are also provided for each half of the chamber. By including a mechanism for driving the pistons in unison and opening and closing the peripheral inlets and axial outlets in a particular order, pumping action can be achieved. The pump disclosed is particularly useful from down hole oil pumping applications.

Abstract: A piston-cylinder assembly for displacing a load through a long stroke consists of a rod, a piston slidable on the rod and by fluid pressure the piston is clamped to the rod, and a cylinder in which the piston is contained. By clamping the piston to the rod and introducing fluid into the cylinder, relative movement is caused between the piston and cylinder and the rod. When one assembly is used, the movement is intermittent but, by mounting two pistons on the rod, each piston being in a separate cylinder, and by controlling the flow of fluid, the movement is continuous.

Abstract: The control mechanism is for pneumatic apparatus of the kind comprising a piston-and-cylinder motor coupled between two relatively-movable parts (such as door-leaves) for driving them, when energized, to a predetermined relative position. A pilot valve is actuated when required to switch the apparatus to an emergency mode by isolating the motor from its power source and discharging it into an emergency reservoir having a volume large compared with the maximum volume of gas in the motor. While the pilot valve is actuated, the relatively-movable parts are urged towards their predetermined relative positions by a force small compared with the normal operating force. The pilot valve may be arranged to operate operation of an emergency release bolt, on obstruction detected by a detector valve (in which case a timing reservoir provides time delay before full power is restored), on power failure, or as required.

Abstract: Apparatus for repeatedly dispensing measured portions of viscous substances is disclosed. The invention includes a body defining a bore within which is a sleeve defined floating measuring chamber. In the chamber is a sliding piston. Material to be dispensed is forced into the floating measuring chamber under pressure. A three-way, two-position air valve actuates the dispensing apparatus. Shifting of the air valve applies air pressure to one end of the floating measuring chamber, causing it to shift. This closes a material supply port and opens a material discharge port. The floating measuring chamber meters the flow of air to the floating piston so that the discharge velocity of the material being dispensed is controlled. At the end of the dispensing cycle, air under pressure is directed out through the material discharge port clearing it of residual material.

Abstract: A duct motor for carrying drawing ropes and the like through cable ducts consists of two inflatable gripper bags and a telescopic section. The duct motor is driven by compressed air, and operates by one gripper bag inflating, telescopic section extending, the other gripper bag inflating and the one gripper bag deflating, telescopic section contracting and the cycle being repeated. Compressed air is distributed within the duct motor by a distribution valve and a pair of inflation and deflation valves associated with each gripper bag. One distribution valve is not located between the gripper bags and this valve has a valve stem which is hollow, and is used for conveying compressed air from an input orifice to the remote end of the duct motor i.e. the other gripper bag.

Abstract: A control element is provided for a gearbox ratio selector in a heavy vehicle of the type in which the gearbox ratio selector is operated by means of a pair of pneumatic cylinders having opposite rods and chambers controlled from the handle of the gearshift lever. The pneumatic cylinders are controlled through an intermediate device between the cylinders and the distributor valve included in the handle of the gearshift lever, so that the activating fluid of the cylinders is independent of the fluid in the handle of the gearshift lever. The distributor valves are connected to control valves advantageously incorporated in the intermediate body provided between the parts opposite to the outlet of the rods in the operating cylinders of the selector.

Abstract: A pneumatic reciprocating mechanism comprising a working member (11) reciprocably powered in a housing (10) and forming together with a vibration absorbing reaction support member (12) and an elastic seal element (47) a working chamber (49) which is supplied with pressure via an air feed valve (54,55). The latter is positively coupled to the working member (11) and controls the air flow through openings (54) in the reaction support member (12) in response to the relative positions of the working member (11) and the reaction support member (12).The elastic seal element (47) is associated with the working member (11) and has an annular valve collar (48) which is arranged to establish sealing contact with a diverging peripheral wall (52) of the reaction support member (12) by radial expansion due to the air pressure in the working member (49).

Abstract: A vibration and noise attenuating construction for impact air tools, such as a chipper, includes axially reciprocal working and balancing members which move toward and away from each other. The end of one member defines a cylinder and cylinder chamber which receives a piston defined in the end of the other member. Pressurized air is introduced into the cylinder chamber causing the chamber to expand and the members to be translated axially from each other against the force of compression springs. Translation of the piston beyond an exhaust passage in the cylinder wall permits the chamber to exhaust whereupon the compression springs will drive the members toward their original position. The members constantly cycle in this manner to provide vibration attenuation.

Abstract: An installation for the servo-assist of actuating devices in motor vehicles, especially of a hydraulic brake system, in which a control member, such as the brake pedal, acts on an actuating device, such as a master cylinder of a two-circuit brake system by way of a servo-member; a hydraulically actuatable servo-unit is thereby arranged between the control member and the actuating device whose first part is supported at the control member and whose second part is connected with the actuating device; the actuation of the servo-unit is controllable from a hydraulic pressure medium source in the manner of a follower control by means of a control device connected with the control member.

Abstract: A push rod assembly having a first section and a second section through which an input force is transmitted to an output member. The first section includes a cylindrical member with a bellows attached thereto. The cylindrical member has a bore therein. The second section includes a piston that is attached to a brake pedal by a pivot pin. The piston divides the bore in the cylindrical member into a first chamber and a second chamber. The piston has a passage therethrough that connects the first chamber with the second chamber. A valve located in the passage controls the communication of fluid from the first chamber to the second chamber. A linkage member which extends into the bore in the cylindrical member is connected to a plate with a slot therein. The pivot pin associated with the brake pedal extends through the slot to attach the plate to the brake pedal.

Abstract: A hydraulic pressure control device for use, for example, in an automatic transmission, in which a line pressure to be supplied from a hydraulic pressure source to a hydraulic pressure servo-device is controlled in three stages by means of a main spool which is displaced in a bleed-off valve of the line pressure by a subsidiary spool under a varying hydraulic control pressure. The subsidiary spool has at least one land forming a piston slidingly fitted in a movable sleeve having a closed end, the movable sleeve also forming a piston by being in turn slidingly fitted for limited movement in a stationary sleeve having a closed end. A first space between the outer wall of the closed end of the movable sleeve and the inner wall of the closed end of the stationary sleeve, and a second space within the piston chamber of the movable sleeve have ports for the introduction of hydraulic control pressure.

Abstract: A system for rotating a control shaft which includes a lever arm attached to the control shaft and having arm members extending radially outwardly from the shaft. A motor having a piston and rod assembly reciprocatively mounted in an outer housing is resiliently mounted relative to the control shaft. The rod is universally coupled to one of the arm members, while the other of the arm members is coupled through strap means to the outer housing of the motor. When the motor is energized, the rod applies a pushing force to tend to rotate the control shaft and the housing applies a pulling force to aid in rotating the control shaft.

Abstract: A vibration attenuating device to be used in conjunction with reciprocating-motion type impact mechanisms having working and stop members that are axially movable relative towards or away from one another. The members define a pressure chamber therebetween, which is in communication with a source of pressure medium and is sealed by a flexible sealing material such as an O ring. Each member is acted upon by a compression spring exerting a force on the individual member in a direction towards the other member. The introduction of the pressure medium into the pressure chamber results in a cycle comprising the (1) members being forced away from each other, (2) the pressure medium escaping from the pressure chamber and (3) the members being returned to their original positions by the action of the springs. The invention provides a completely balanced two mass system which is particularly useful in conjunction with impact mechanisms used for hand tools.

Abstract: A multistage, extensible-contractible hydraulic ram assembly for use in conjunction with a triple-lift-type mast in a lift truck. The assembly is designed for mounting in such a truck in a so-called inverted position. It is constructed with special, externally actuated, internal valving which, through controlling the action of pressure fluid within the assembly, assures positive control over the sequence of movements of the sections in a mast as such are raised and lowered, without requiring latching and interlocking of these sections. Further, the assembly features the capability of producing substantially uniform or constant lifting and lowering speeds for a load which is carried on the usual carriage mounted on a mast of the type indicated.

Abstract: A power slide mechanism comprising a supporting frame, a moving frame mounted slidable on said supporting frame, double-acting fluid pressure device including a cylinder, a piston fitted slidably in the cylinder and a respective piston rod fixed to the piston at each end thereof and penetrating through the cylinder so that one end of each piston rod projects from respective end face of the cylinder, and a respective engaging and fastening device mounted at each end of the supporting frame and adapted to releasably engage the free end of a respective one of the piston rods.

Abstract: A hydraulic cylinder assembly in which cylinders are separated into two coaxial cylindrical portions sealed hydraulically one from the other, one having an extensible piston therein and the other being extensible together with the extensible piston on a fixed supporting piston. In an exemplary embodiment two such cylinder assemblies are mounted to operate in opposite directions within various predetermined fixed limits of extension to control the extension of a telescopic spreader frame for handling containers to selected ones of such fixed limits. For different combinations of such fixed limits of extension in one or more selected installations, different length spacers are used at the time of assembly in the cylinder assemblies to establish various fixed and predetermined intermediate extensions between full extension and full retraction thereof.

Abstract: A stacker crane storage arrangement wherein a tray is supported for reversible extension transversely of a tower which is movable on a track, so as to deposit cargo laden pallets in cells or cubicles of open sides storage grids on both sides of the track. The tray of the tower is movable by a compact mechanism, utilizing telescopically and reversibly extending drive members carried by pairs of cantilever beams and driven by sprocket chains and hydraulic cylinders in a dual system which effects reversible motion of a tray to either side of the tower. The telescopic tray mechanism provides for moving a cargo laden tray to either a part distance or a full distance transversely of the tower, so that pallets can be stored in or retrieved from double depth storage grids. The specific racks or cells can hold two pallets in tandem, there being a first pallet position and a second pallet position in each cell. The arrangement and construction has features whereby very tall towers are usable.

Abstract: What follows is a description of a hydraulically powered actuator for producing a reciprocating output and a method which produces a reciprocating output in response to the controlled flow of a hydraulic fluid. The hydraulic actuator includes, in one embodiment, a cylinder within which a piston assembly is reciprocated, the cylinder being itself displaceably mounted within a housing so that it can periodically introduce a unique flow passage through which a rapid fluid flow occurs, the provision of the passage reduces the hydraulic power lost during reciprocating movement of the piston assembly and ensures a high energy output.