Abstract: A lifting device designed to be mounted on the chassis of a vehicle for loading and unloading the vehicle having a first arm designed to be articulated at least indirectly to the chassis of the vehicle and, attached to the first arm, a second arm normally perpendicular to the first arm ending with a hook for grasping an upper part of the load. The second arm is retractable and is formed by a first section attached to the first arm and a second section carrying the hook, movable relative to the first section between a retracted configuration and a working configuration, at least one pair of complementary locking members being provided for locking the second section in its working configuration.

Abstract: A hydraulic valve is adapted to be connected between a pressurized supply line and first and second lines feeding respective first and second circuits with different functions, such as the steering and braking functions of an automobile vehicle. It comprises a first control member adapted to connect the supply line to the first feed line, a two-way distributor device for the second feed line and a second control member adapted to apply to the second feed line a pressure proportional to the force exerted by the user damped by virtue of a dashpot effect.

Abstract: A valve for retaining a jack which retains a drive load. The braking valve includes a pressure reducing valve and safety valve, one of which ensures that the pressure in the chamber is retained, while the other modulates the pilot-control pressure P.sub.p. Thus, at each moment, the pilot-control pressure P.sub.p is adjusted to the value of the retaining pressure P.sub.l.

Abstract: A removable support with a transverse hooking bar for equipping a front panel of a container, having a front panel and an upper panel, to receive a hook of a swinging cross piece bracket, adapted to fit a transportation and handling vehicle, wherein a transverse hooking bar of the movable support receives a handling hook which is connected to the vehicle. The hooking bar is thereby disposed on the front panel, connected to the removable support. The container is locked into place by an eclipsible lock, but at the same time the removable support can be unlocked, allowing access to the front panel of the container. The removable support can pivot about an axis to a horizontal position on the upper panel of the container where it may be locked into place. The support is vertically moveable on the front panel and may be secured at the top or bottom of the panel by means of the eclipsible lock. A swinging door located on the front panel is made accessible by use of the removable support.

Abstract: A proportional type hydraulic distributor incorporates a distributor slide valve including a feed chamber. It is provided with a pressure compensator device for regulating the feed pressure to the feed chamber according to the output (load) pressure of the slide valve. This device includes an inlet channel, an outlet channel communicating with the feed chamber and a stator communicating with the inlet and outlet channels. A compensator slide valve slides in a housing in the stator. A spring exerts an axial force on the compensator slide valve in the same direction as the force exerted on it by the output pressure and in the opposite direction to the force exerted on it by the feed pressure. An annular obturator member on the compensator slide valve isolates the inlet and feed channels and is acted on by a return spring on the compensator slide valve. The latter has a recessed part on which the obturator member slides without clearance.

Abstract: A lorry fitted with a known system which allows it to handle a container in order to load it, to unload it onto the ground, or to tilt it towards the rear to accomplish a tipping operation. A platform of a detachable cradle has a jack which operates a tipping chassis. A longitudinal pivot shaft of the tipping chassis is mounted at the side of the cradle, which permits lateral tipping of the container. Another jack, and the alternative fitting of one or the other of two longitudinal pivot shafts, permits selective tipping to the right or left side of the lorry as desired.

Abstract: A tipping apparatus for a truck body includes a piston and cylinder type thrustor connected at one end to the truck body and connected at its other end to a slide on the truck chassis. Initial extension of the thrustor is converted, via a triangular push rod pivoted on the chassis and linked at one end to the slide thereby providing to a substantially vertically upward lifting force on the truck body.

Abstract: The present invention pertains to a platform having a front trestle that is designed for the handling of containers. This platform includes four ISO Standard corner fittings. The platform includes at its rear tiltable extension arms which selectively provide two rear twist locks on the platform, these in combination with two twist locks on the front of the platform provides a total of four twist locks. Because the rear twist locks can be rotated to a rearward operating position, the platform can receive an ISO type container regardless of the thickness of the trestle. When the rear twist locks are rotated to a forward retracted position, generally shaped containers can be handled as well. With this arrangement, the tiltable arms and their twist locks cannot be separated from the platform and can therefore not be lost.

Abstract: A device for handling a container on a vehicle to permit the container to be tipped about an axis at the rear of the vehicle or to be loaded or unloaded. The device has a reciprocable frame which carries the tipping axis and is caused to reciprocate along the chassis of the vehicle by a horizontally extending hydraulic jack. The device includes hooks to secure the container in a fixed position before the vehicle is used for transporting the container.

Abstract: The invention relates to a travelling support pillar for use in underground mines.The support pillar has a link subjected to the action of a positioning jack. The positioning jack extends between a gate and the rear of the top of the pillar. The positioning jack hydraulically locks the support pillar by means of a sliding pressure-relief valve to compensate for load changes due to the movement of the floor or the roof. The link also permits the support pillar to be collapsed for transportation, and it provides a support pillar with a shorter length and a lower height in the collapsed position, and it permits the top of the support pillar to be placed closer to the working face of the mine when the pillar is in its roof supporting extended position.

Abstract: A speed limiting hydraulic slide valve. The slide valve is provided with control pressure chambers at each end thereof. The slide is provided with a longitudinal passage at each end and this passage opens into the adjacent control pressure chamber. Each passage is normally closed by a check valve. Each longitudinal passage communicates with a peripheral passage on the valve of the slide by means of a radial passage. If the hydraulic actuator, such as a cylinder, begins to move too rapidly, the pressure in the radial passage will drop, and the pressure in the appropriate control pressure chamber will thereupon overcome the check valve in the passage which opens into such chamber, and this will cause the valve slide to move in a direction which will decelerate the action of the cylinder.

Abstract: A safety valve designed for relieving pressure in a mine support jack. A washer and check valve are positioned in a counterbore located on the front surface of a resilient gasket member. A leg extends from the rear surface of the resilient gasket and extends through a rear chamber to support the check valve in a position sealing the outlet port. The rear chamber is filled with pressurized gas to form a gas cushion. The end of the leg is positioned to seal an inflation orifice.

Abstract: A method and apparatus for loading of a piece of equipment on a lorry. The apparatus includes an arm pivotally interconnected with the lorry and a first jack interposed the lorry and the arm. A jib is telescopically interconnected with the arm. A movable platform is interconnected with a hook on the jib. A cable passes over a pulley interconnected with the movable platform and is hooked to the chassis at one of its ends and to the piece of equipment at the other of its ends. The method includes the steps of moving the piece of equipment rearwardly along the movable platform, the movement of the piece of equipment therealong acting through the cable and pulley to displace the movable platform rearwardly relative to the lorry until the movable platform and the piece of equipment are displaced to a position wherein they are unbalanced on the lorry. Gravity is then used to permit the lowering, by a tilting action, of the movable platform.

Abstract: A slide valve especially designed for mining prop cylinders. The slide valve is durable and can be easily checked and adjusted. An inlet pressure line is separated from an outlet line by a diaphragm pressed against its seat by a spring. A thrust washer allows the diaphragm to remain flat, even when it is subjected to the pressure of the spring.

Abstract: The body of the braking valve includes a front chamber, an intermediate chamber and a rear chamber which surround a blocking component and a governing piston. The diameter of the bore, in which slides the governing piston at the rear of the chamber, is equal to the diameter of the line along which the truncated conical bearing surface of the blocking component comes into contact with a seat situated between the front and intermediate chambers. The pressure in the intermediate chamber is connected to an outlet of a distributor which has no effect on the balance position on the blocking component.

Abstract: A hydraulic valve includes a valve body and slide, along with control pieces consisting of two thrust bearings rigidly mounted with a link which is mounted through an axial hole of the slide valve and through the axial holes of the two respective secondary pistons. The slide valve and the secondary pistons are mounted so as to provide an ample gap between the thrust bearings. The secondary pistons, located on either side of the slide valve, delineate two rear chambers which are fed with low pressure fluid. Thus, a gradual displacement of the slide valve is permitted.

Abstract: The device comprises a derrick with a main telescopic arm and an auxiliary arm. The telescopic arm 9 is pivoted on a sub-frame which in turn is pivoted to the main chassis of the vehicle. At the front the main vehicle chassis 3 is mounted a cam having ramps 20 and 21 on which travels a roller mounted to the free end of the telescopic arm. In order to tip the load on the vehicle, the telescopic arm is first contracted, providing a slight upward swing of the arm when the roller 22 climbs the ramp 20. This appreciably relieves the load requirements of the tilting jack thereby enabling handling of larger loads.

Abstract: The invention relates to an improved semi-trailer for transportation and handling of standardized containers.The semi-trailer comprises a main chassis 1 and a pivoting chassis 4 connected to each other by front connecting rods 5 and rear connecting rods 6, the latter comprising a transverse spindle 16 which slides in apertures 18 in the chassis 4, itself provided with a bracket 21-22 whose free end is provided with a transverse pivot bar 33 intended to engage on the front upper corner fittings of the standardized container.

Abstract: A selective and proportional hydraulic remote control device including jacks which are connected to a high pressure oil circuit commutated by distributors. The distributors are remotely controlled by a low pressure circuit which is connected to a fluid emitter. The emitter causes the input flow of the low pressure circuit for the distributors to vary. Only the input to the low pressure circuit takes place from the emitter through connections, while the return to the tank takes place from the distributors through jets, the sections of which are fixed. The same distributor can be controlled from several different locations.

Abstract: The present invention relates to a control device for a controlled non-return valve provided in large hydraulic distributors. During the mode of operation where the double acting hydraulic ram is in a non-movable state, a means is utilized to communicate a control pressure to the one-way non-return check valve to positively maintain the check valve in a closed state thereby eliminating the accidental opening of the return valve and maintaining the double acting hydraulic ram in its initial position.