Abstract: A rotation-preventing mechanism for regulating the free rotation of an outer piston in a boosting cylinder apparatus is composed of at least one engaged groove formed in the inner surface of a cylinder tube integrally with the cylinder hole and at least one engaging member that is mounted on the outer circumference of the outer piston and fitted in the engaged groove in such a way as to be moved along the engaged groove.

Abstract: A cylinder device includes a casing with a pair of fluid inlet/outlet ports defined therein, a base plate, a piston fixed to the base plate, a cylinder, and a top plate. The cylinder device also has first, second, and third cylinder chambers defined in the cylinder between the base plate, the piston, and the top plate, a first fluid passage and a second fluid passage through which one of the fluid inlet/outlet ports communicates with the first and third cylinder chambers, and a third fluid passage and a fourth fluid passage through which the other fluid inlet/outlet port communicates with the second cylinder chamber.

Abstract: A fluid pressure cylinder (1) includes two cylinder end walls (6',6"), a cylinder tube (2) and a piston (3), which is axially movable inside the cylinder tube, wherein at least one of the cylinder end walls is provided with an outward housing portion (7;60) and, located therein, an inward insert portion (8;61) which comprises a portion of at least one fluid channel belonging to the cylinder. The cylinder is distinguished in that the housing portion axially contacts the cylinder tube under force transmission, and that the insert portion includes an integral valve seat (12,16,22") of a fluid valve which is located in said fluid channel.

Abstract: A piston for use in a compressor that compresses gas containing lubricating oil is disclosed. The compressor includes a housing having a crank chamber and cylinder bores, and a swash plate located in the crank chamber. The swash plate is operably connected to the pistons by shoes to convert the rotation of a drive shaft to the reciprocation of each piston. Each piston has a head for compressing the gas supplied to the cylinder bore and a skirt projecting from the head toward the crank chamber. The skirt is connected to the swash plate. A restrictor is provided on the skirt to prevent the piston from rotating in the cylinder bore. The restrictor has a pair of arched surfaces slidably contacting an inner surface of the housing and a recessed surface located between the arched surfaces and free from contact with the inner surface. The recessed surface defines a gap for allowing passage of the oil between the recessed surface and the inner surface.

Abstract: A piston and cylinder assembly for use in actuating a locating pin for sheet metal provides stability for a pin mounted thereon against side to side movement and rotation. To this end the assembly includes a cylinder body assembly with an internal bore and a piston axially slidable within the bore. A piston rod is connected with the piston, and the rod has a free end for connection of a sheet metal locating pin. A first guide surface is formed within the cylinder body assembly and a second guide surface is formed on one of the piston and piston rod, the first and second guide surfaces cooperating to prevent rotation of the piston and piston rod as the piston and piston rod slide axially with respect to the cylinder body assembly. The first and second guide surfaces preferable are internal and external splines. First and second bearings are connected to the cylinder body assembly and support the piston rod for straight line movement. The first and second bearings being located on opposite sides of the piston.

Abstract: A prosthetic suspension unit for cushioning shocks in a prosthetic is provided. The unit includes a cylindrical sleeve attachable to a first prosthetic member; attachment member attachable to a second prosthetic member; a slide bearing allowing the attachment member to slide axially relative to the sleeve; an energy storage member cooperating between said attachment means and the sleeve; a piston positioned to slide within said sleeve and engage an axial end of the energy storage member; and anti-rotation mechanism cooperative between said sleeve and the attachment member for preventing relative rotation therebetween.

Abstract: A linear thruster is disclosed in which a load beam is linearly moved by fluid power relative to a guide beam and a piston. The beams are multisided in cross-section to substantially increase the linear bearing area between the bodies and, thereby, substantially increase the strength of the linear thruster against side forces as well as moments to which the linear thruster might subjected. Internal positioning of the components and energy transmission are maximized and the stroke may be variably adjusted.

Abstract: In a swash plate type compressor in which a piston (60) is reciprocated in accordance with a rotary motion of a swash plate and is located within a housing (2) having an inner periphery (2a), the piston is formed with first and second rotation-regulating surfaces (62a, 63a) which face the inner periphery and have centers of curvature at positions different from one another. The first and second rotation-regulating surfaces are angularly offset from one another. It is preferable that the curvature of each of the first and second rotation-regulating surfaces is equal to or smaller than that of the inner periphery of the housing.

Abstract: A linear actuator comprising a guide section formed along a longitudinal direction to protrude on a bottom surface of a slide table, a pair of guide blocks formed mutually opposingly and seperated from each other by a predetermined spacing distance on an upper surface of the main cylinder body, attachment holes for attaching the main cylinder body to another member in any direction of attachment from a side of the slide table or from a side of the main cylinder body, and an adjuster bolt for adjusting an amount of displacement of the slide table.

Abstract: A linear thruster is disclosed in which a load beam is linearly moved relative to a guide beam by fluid power. One or both of the beams are multisided in cross-section to substantially increase the linear bearing area between the beams and substantially increase the strength of the linear thruster against side forces as well as moments while permitting a substantial reduction in the volumetric space consumed by the linear thruster. The fluid power and the energy inputs to the linear thruster may all be positioned at one end of the guide beam.

Abstract: A piston for use in a compressor that compresses gas containing lubricating oil is disclosed. The compressor includes a housing having a crank chamber and cylinder bores for accommodating the pistons. A swash plate is located in the crank chamber and is supported on a drive shaft. The swash plate is operably connected to the pistons by shoes to convert the rotation of the drive shaft to reciprocation of each piston. Each piston has a head for compressing the gas supplied to the cylinder bore and a skirt projecting from the head toward the crank chamber and connected to the swash plate. A restrictor provided on the skirt slidably contacts an inner surface of the housing to prevent the piston from rotating in the cylinder bore. A sloped surface extends along the edge of an end face of the restrictor. The sloped surface guides the oil in the crank chamber toward the shoes when the piston moves from a top dead center position to a bottom dead center position.

Abstract: A cylinder apparatus includes a base plate, a piston fixed to the base plate and having a piston head and a piston rod connected thereto, a cylinder body having a cylinder chamber defined on one side of the piston head and a cylinder chamber defined on another side of the piston head around the piston rod, the cylinder body being supported for reciprocating movement with respect to the base plate in axial directions of the piston, an upper plate fixed to the cylinder body, and a bushing held in slidable contact with an outer circumferential wall surface of the cylinder body for guiding the reciprocating movement of the cylinder body.

Abstract: A compressor is disclosed, in particular for air-conditioning systems in vehicles, having at least one piston movable in a cylinder, a drive shaft and a wobble plate arrangement between the piston and the drive shaft. To improve the efficiency and to reduce leaks, the wobble plate arrangement comprises a swash plate, on which a wobble plate is rotatably mounted. Between the wobble plate and the piston is arranged a bearing which allows movement of the wobble plate relative to the piston in the circumferential direction.

Abstract: The invention relates to a novel design of a lifting column, especially for patient tables or for industrial applications, with at least one lifting cylinder designed as a hydraulic cylinder at least for one vertical stroke and with at least one guide assigned to at least one lifting cylinder for guidance in the direction of the stroke of the lifting cylinder.

Abstract: A compressor has a front housing, cylinder block and a rear housing. The housings and cylinder block are secured to one another by a plurality of bolts. A plurality of pistons reciprocally move in cylinder bores to compress gas. Each of said bolts has a shaft extending through the housings and the cylinder block. A cam plate is supported on a drive shaft for integral rotation therewith to convert the rotation of the drive shaft to reciprocal movement of a piston in the cylinder bore. The piston rotates about its axis in accordance with rotation force transmitted from the cam plate and abuts against the shaft of the bolt, which extends in close proximity to the piston. The rotating piston abuts against the shaft so that the rotation thereof is restricted. The shaft has a diameter greater than that of a threaded portion formed at an end of the bolt. Since the threaded portion is smaller, the threaded portion does no damage to the piston during assembly.

Abstract: A fluid power cylinder comprises a terminally arranged piston rod guide device through which a guide station of the piston rod with a prismatic cross section runs. Two diametrally opposite prism side edges of the guide section fit into circumferentially extending guide grooves in a plurality of guide rollers, the surface sections, which laterally adjoin prism side edges, of the guide section being supported by the flanks of the guide grooves.

Abstract: The reciprocating piston machine has a wobble plate gear, in which the pins (2) are connected in articulated manner to the circumference of the wobble plate (3) by in each case one ball end (21), which engages directly or by means of an interposed slip ring (29) with a spherical inner face (30) in a guide (28) directed transversely to the piston axis. As this leads to the avoidance of connecting rods with in each case two ball ends, the machine can be given a more compact construction.

Abstract: A welding gun that prevents rotation of the electrode, including a cylinder and a reciprocating piston assembly having a pair of pistons. In addition to the conventional connecting rod, the pistons are interconnected by an anti-rotation rod radially offset from the connecting rod. The anti-rotation rod extends through a partition fixed within the cylinder, thereby preventing the piston assembly from rotating within the cylinder. The welding gun also includes an internal proximity switch for detecting when the piston assembly is fully retracted.

Abstract: In a variable displacement swash plate type compressor, there is employed a structure for stopping or minimizing a turning movement of a piston about its axis. The structure comprises a given part of the piston which is always out of the corresponding cylinder chamber; a turn stopper portion formed on the given part and including laterally opposed sides each having a rounded outer surface; and a cylindrical surface defined in a casing of the compressor at a portion which faces the turn stopper portion. The cylindrical surface is so arranged as to make a surface-to-surface contact with one of the laterally opposed sides when the piston is turned about its axis by a given angle.

Abstract: Piston rods are coupled to respective pistons movably disposed respective cylinder chambers defined in a cylinder body. The piston rods have distal ends connected to an end plate mounted on a slide table which is mounted for movement along a guide rail. When the piston rods are displaced by the pistons, the slide table is also displaced axially of the cylinder body. When the slide table is positioned at either end of its stroke, a load is applied by the weight of a workpiece supported on the slide table and the weight of the slide table itself to the cylinder body through the guide rail. The slide table is thus prevented from being unduly flexed under the load. The length of the slide table can be set to a desired length irrespective of an increase in the displacement of the slide table. Even if the displacement of the slide table is increased, the slide table is not flexed and hence remains highly rigid against flexure.

Abstract: A cylinder apparatus includes a base plate, a piston fixed to the base plate and having a piston head and a piston rod connected thereto, a cylinder body having a cylinder chamber defined on one side of the piston head and a cylinder chamber defined on another side of the piston head around the piston rod, the cylinder body being supported for reciprocating movement with respect to the base plate in axial directions of the piston, an upper plate fixed to the cylinder body, and a bushing held in slidable contact with an outer circumferential wall surface of the cylinder body for guiding the reciprocating movement of the cylinder body.

Abstract: A self-locating piston ring for a piston of a two-stroke engine. The piston is slidable in the cylinder bore of a two-stroke engine and is provided with a circumferential groove. A recess extends radially inward from a portion of the groove. A split piston ring is located in the groove of the piston, and the piston ring is provided with a tab which extends radially inward and is received within the recess, thereby preventing rotation of the piston ring relative to the piston.

Abstract: The invention relates to a hydraulic mechanism comprising: a cam; a cylinder block; cylinders formed in the cylinder block; pistons slidably mounted in the cylinders; thrust rollers for the pistons acting on the cam and axially defined by two transverse faces; two wedging parts for each roller, each wedging part being disposed in a recess between the end face of the roller and the inside face of the cylinder, thereby holding the roller in position, one of the wedging parts extending to the bottom portion of the recess and including a groove parallel to the axis of the piston, and a projection that is fixed relative to the cylinder being received in the groove.

Abstract: A jack consists of a body of the jack (2) sliding on a fixed piston (9) mounted on a support (6) by means of a piston rod (4), and at least one element for guiding the body on the support. The body of the jack is an extruded section (2) containing at least one longitudinal bore (3) used as the piston chamber for the jack, and equipped with at least two guide rods (5) mounted on the section (2) in the longitudinal direction. Bearings (15) adapted to the shape of the guide rods (5) are mourned on the fixed support (6). At least one of the bearings is adjustable. Advantageously, the extruded section (2) is equipped with two hydraulic shock absorbers intended to contact limit stops (21). Limit stops (21) have adjustable positions, and can be retracted and fixed on an L-shaped groove (20) of the fixed support (6).

Abstract: A piston-type compressor has a compressor housing enclosing a crank chamber, suction chamber, and a discharge chamber. The compressor housing also includes a cylinder block having at least two cylinders. A single head-type piston is slidably disposed within each of the cylinders. A drive shaft is rotatably supported in the cylinder block. A plate is tiltably connected to the drive shaft. A bearing couples the plate to the pistons, so that the pistons are driven in a reciprocating motion within the cylinders upon rotation of the plate. A piston guiding mechanism has a first guiding device which is formed on the peripheral of the piston, and a second guiding device which is disposed within the housing for guiding the first guiding device to slide smoothly along the second guiding device and to prevent the piston from rotating around its axis or radially inclining when the piston reciprocates in the cylinder.

Abstract: A substantially flat abutting surface 20a is provided on an outer side of a carriage member 6 which is axially movable along the outer periphery of a cylinder tube 2, while a rail 4 with a substantially flat guide surface 4a is mounted between a pair of end covers closing the opposite axial ends of the cylinder tube. Rotational movements of the carriage member 6 are restricted by the rail 4 which is located on the outer side of the carriage 6.

Abstract: A fluid power operated advancing unit has housing and a plunger adapted to run axially therein. The plunger is designed in the form of a three sided prismatic body at least along its length section running in the housing, said body being guided in the housing at its three side surface, whereas three transitions between respective adjacent side are not guided. The result is accordingly an extremely accurate guiding action for the plunger while simultaneously preventing rotation thereof.

Abstract: A hydraulic drive system for positioning a part such as the electrode of an electrical discharge machine includes a hydraulic cylinder and a piston slidably mounted in the cylinder and separating it into opposite first and second chambers on opposite sides of the piston. A piston rod extends from the piston through one end of the cylinder for connection to a part to be positioned. A reservoir containing hydraulic fluid is mounted on the cylinder, and a pump has an inlet communicating with the reservoir and an outlet connected via passageways to the first and second chambers. Return passageways are provided for returning fluid from the chambers to the reservoir, and valves control fluid flow from the pump to the chambers and back from the chambers to the reservoir in order to drive the piston in opposite directions. The reservoir, pump, valves, and at least part of each connecting passageway are located within a single outer housing.

Abstract: A device for securing a cylinder liner (3) to a respective pumping module (2) in a reciprocating pump has a set of arrangements each with a hydraulically activated piston (8), a rod (11) of which is adapted to receive a nut (12), the retraction of which forcibly compels in attraction the cylinder liner (3) and the pumping module (2).

Abstract: Disclosed is an improved hydraulic lift system comprising a cylinder housing preferably in the shape of a regular polygon which applies compressive force to a cylinder within the cylinder housing. This cylinder is preferably made from extruded plastic. Within the cylinder is a three ringed piston to which is attached a piston rod. The piston rod is adapted for connection to a horizontal cantilevered arm assembly.The improved lift permits cantilevered transport from specially designed handicapped chairs and stretchers for access to and egress from a pool or spa.

Abstract: A fluid power cylinder whose piston rod has on its outer periphery at least one axially extending surface section having the form of a flat. Such surface section has a longitudinal groove, which contains a magnetic strip able to be scanned by a sensor device on the housing. The magnetic strip has alternatingly arranged poles areas in succession, which can be scanned without contact by the sensor device. The magnetic strip is covered by a cover band fixed on the piston rod and consisting of a material allowing the passage of a magnetic field, whose external surface facing away from the magnetic strip constitutes at least a part of the piston rod's surface section having the form of a flat.

Abstract: A fluid actuated linear slide for producing linear movement has a rigid body with a pair of spaced apart parallel bores for slidably receiving a pair of guide rods and a mounting plate fixed to one end of the guide rods. A fluid actuated cylinder is carried by the body between and parallel to the guide rods and has a casing and a rod slidably received in and extending from one end. The rod is connected with the mounting plate for reciprocating the plate and the guide rods with respect to the body. The linear slide is constructed in such a manner that two or more of the slides can be attached in series for producing movement in one or more paths.

Abstract: A booster housing, especially for vehicle brake systems, and a method of assembling such a booster housing in which a booster housing (20) has two housing bottoms (26, 28) which are each disposed at one side of a movable partition (60). Connecting members (32) on at least one of the housing bottoms (26) are each tightly crimped around one fastening hole (30). Spacers (50) extend between the two housing bottoms (26, 28) as well as through the partition (60). Each of the connecting members (32) is provided with a recess (40) into which an end portion (52) of the associated spacer (50) is inserted and crimped. The booster housing (20) is assembled by inserting an end portion (52) of a spacer (50) into the recess (40) of one connecting member (32), passing the connecting member (32) through a fastening hole (30), and simultaneously crimping the connecting member (32) with the housing bottom (26) and the spacer (50).

Abstract: A guided cylinder wherein a yoke (B) for bridging diagonally opposed guide rods (A) has connection thereto by means of first enlarged aligned abutments (C) adjacent upper ends of the guide rods to provide a mounting as well as flats for securely holding guide rods while affixing the yoke and thereafter providing a stable mounting for the yoke. The yoke has second abutments (E) integral with the first abutments for receiving threaded fasteners (D), having a lesser cross-sectional area extending upwardly into recesses therefor carried in the yoke to eliminate lateral movement as may result in misalignment of the guide rods.

Abstract: Power transmission device for linear movement, comprising a principal member (2), which is movable along a displacement path, and a housing (1) which presents bearing means (10) for the movement of the member along the displacement path. A guide member (3) is arranged to guide the principal member in its displacement path, and a power member (4) is arranged to be able to be activated to apply a force to the principal member so that it moves while being guided by the guide member. A portion of the principal member is arranged to drive a connected device. The principal member (2) and the housing (1) and suitably also the power member (4) are each formed from longitudinally extending sections or profiles with essentially constant cross-sections along their lengths. In this manner the power transmission device can be produced in various lengths from a basic embodiment by cutting said profiles from raw material profiles having the cross-section referred to.

Abstract: A linear device includes a housing supporting a central hydraulic or pneumatic cylinder and a pair of support shafts on either side of the central cylinder. The cylinder includes a longitudinally-moveable piston rod which is attached at its distal end to a tooling plate. An alignment coupler is received within a cavity in the tooling plate, and interconnects the cylinder piston rod and the tooling plate. The alignment coupler includes an annular bearing pad with an inner planar surface disposed adjacent an inner endwall of the cavity, and an outer convex curved surface facing away from the inner endwall. A T-shaped operating rod is disposed within the cavity having an annular shoulder flange with a concave curved inner surface adjacent to the curved surface of the bearing pad, and a convex curved outer surface.

Abstract: A hydraulic actuator including a single cylinder body which defined therein a pressure chamber in which a first piston with a piston rod and a second piston with a piston rod are independently movably inserted, a first working member secured to the first piston rod, a second working member secured to the second piston rod, and pressurized fluid inlet and outlet ports provided in the cylinder body to be connected to the pressure chamber.

Abstract: A hydraulic clutch slave cylinder (16) for a motor vehicle clutch comprising an annular body (21) having inner and outer cylindrical walls (22,23) defining a annular bore (40) therebetween, and a piston (31) having annular portion (32) sealingly slideable in the annular bore (40), an outer portion (34) concentric with the inner portion and telescopically co-extensive with the outer cylindrical wall (23). The radially outer portion (34) of the piston has a radially outwardly extending flange (37) at its end away from the mouth of the bore, which in use engages a clutch release bearing assembly (20) which surrounds the piston and annular bore (40) in the retracted condition of the cylinder.

Abstract: A ram assembly for riveting apparatus. The piston rod is stabilized for close tolerance or minimum lateral deviation at the work point by linear bearings which ride on an elongate stabilizer bar and are mounted on an elongate member which is in turn rigidly attached to the piston rod for movement therewith, the lateral deviation of the piston rod being controlled by the orientation of the stabilizer bar. This allows a stabilizing piston rod portion to be eliminated so that the space length-wise taken up by the ram assembly may be reduced.

Abstract: In a slide actuator, a central guide rail having V-shaped grooves defined therein and opened at 90 degree angles, is mounted on a cylinder body. A slide table is brought into engagement with the guide rail. Guide members having V-shaped grooves defined therein are provided inside the slide table so that they are opposed to the grooves defined in the guide rail. Cylindrical roller bearings are alternately fitted at inclinations of 90.degree. in their corresponding channels defined by the opposed grooves. Thus, when the roller bearings are rolled, the slide table is displaced with higher accuracy and a load supported by the slide table is transmitted to the guide rail from the roller bearings.

Abstract: A linear drive device has a linear motor which consists of a piston, an output rod and a control rod. The two rods extend through the two end plates of the motor housing. The working or output rod is designed for the transmission of power to some structure. The control rod cooperates a sensor for positioning. The sensor and also a valve arrangement is integrated in the housing end plate associated with the control rod. The valve arrangement controls flow through pressure fluid duct provided in the housing end plate at the control end for actuating the linear motor.

Abstract: An apparatus and method for mounting a guided cylinder includes a wall (C) extending between the bore (A) for accommodating the guide rods in the housing and a mounting surface (B). A mounting bore is carried across the wall having an enlarged section for receiving a head (D) of a fastening in a reduced section (E) for receiving in a fastening member.

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: A pressure medium linear unit for handling devices for industrial manufacture includes a housing block, at least one operating cylinder for at least one piston, at least one piston rod, at least one guide rod, and guide elements for at least one piston rod and at least one guide rod. The housing block accommodates the at least one operating cylinder for the at least one piston and the guide elements for the at least one piston rod and the at least one guide rod. The housing block is a modular unit and includes a guide unit and a drive unit releasably connected with the guide unit, one behind the other, to form a compact unit in the direction of linear movement. The guide rod and the piston rod are arranged in an axially parallel manner. The end of the guide rod at the end of the drive can be moved within the drive unit. If the guide rod is moved into the drive unit, the drive unit extends at least over the moved-in length of the guide rod.

Abstract: Portable lift structure for moving a support platform between a comparatively dry position above the surrounding deck of a liquid spa tank to a wetting position in the spa tank including two longitudinally extending structural members pivotally connected at corresponding top ends thereof to be moved between a portable and operating positions, one structural member serving as a mast to be removably mounted in the spa tank deck and the other as a platform mount, to be pivoted from above the surrounding spa tank deck to a position above the spa tank and lowered by a hydraulic cylinder and piston to a wetting position.

Abstract: A pressure cylinder in which the piston is hollow and the pressurized fluid is introduced into the hollow of the piston. The cylinder housing includes a core member with supply and exhaust ports. An area between the rear wall of the housing and a rear wall of the piston is exposed to atmospheric pressure at all times, elliminating a need for seals on the outside surface of the piston, and allowing for the piston to be exposed to large transverse forces. Proximity switches are provided in a slot in the upper wall of the cylinder housing to detect the arrival of the piston at its limit positions and a pin secured to the cylinder housing engages a slot in the outer periphery of the piston to guide the forward and rearward movement of the piston within the cylinder. A slot may be provided in the upper wall of the cylinder housing for receipt of a work positioning member secured to the outer periphery of the piston.

Abstract: A device for the rapid precision positioning of a heavy carriage employs stationary positioning bar, for instance a part of a linear electric motor or a gear rack, and a cooperating moving part of the linear motor or a motor attached to the carriage. The carriage is rapidly and roughly displaced with a further drive which may be constituted by a further gear wheel that cooperates with a gear rack and is driven by a separate motor attached to the carriage. This further drive additionally delivers a certain force for the final positioning in such a way that the play between the gear wheel and the gear rack is eliminated by biasing. Instead of a second gear wheel together with its motor a toothed belt, also driven by a separate motor, a pneumatic cylinder or a linear motor may be used. These are mounted separately from the carriage and ar principally fixed in space.

Abstract: The present invention is drawn to an isolation system for separating two diverse fluid mediums from each other and, more particularly, an isolation system for prohibiting leakage of the diverse mediums around the peripheral surface of a piston movably mounted within a chamber. The present invention further relates to an improved multi-piston air-oil pressure intensifier employing the improved isolation system for separating and preventing leakage of the air and oil mediums during operation of the pressure intensifier.

Abstract: A crane and lift apparatus for controlling the lifting and lowering of large cargo containers. A trolley assembly includes a hoist drum from which is suspended a system of cable or rope reevings connected to material securing assembly. The apparatus is effective to unload containers stacked one above another from one location to an alternate location. The system of cable reevings permits the raising and lowering of containers in planes defined by X, Y, and Z axes. The cables are deployed from the hoist drum on the trolley assembly to sheaves disposed at the four corners of the material securing assembly and then returned to anchor assemblies secured to an undercarriage of the trolley assembly. The sheaves are selectively angled and located in headblock assemblies positioned on the material securing assembly. A system of brakes controls movement of the cables through the sheaves.

Abstract: An indexing apparatus (10) having a pair of concentric cylinders (12, 14) with the outer concentric cylinder (12) being fixed against longitudinal movement and the inner cylinder (14) mounted for reciprocal movement relative to the fixed outer cylinder (12). A single ram piston (16) is mounted within the inner cylinder (14) and has a piston rod (18) connected to a member (29) for positioning at four predetermined positions. A shock absorber (24) is carried by the outer fixed cylinder (12) and engages stop plates or abutments (20, 28) carried by the inner cylinder (14) for activation of the shock absorber (24). A pair of guide rods (42) prevent rotational movement of inner cylinder (14) relative to the inner cylinder (12) and maintain the shock absorber (24) in axial alignment with the end abutments (20, 28). In one embodiment (FIGS.