Abstract: The sprayer comprises a container (1) intended to hold liquid for forming the cleaning mass and pressurized air for spraying it, the container (1) being dismantlably attachable to a head (3) bearing a manual pump (4) to increase the pressure of the air, the head (3) also having a supporting handle (23) with a pushbutton (24) operating the outlet valve (18) for the cleaning mass to the delivery nozzle (22), the sprayer having a manually replaceable mixing device (7, 26) located between the outlet conduit (8) for the liquid from the sprayer container (1) and the outlet of damping mass (20) controlled by the manual valve (18), the mixing device (7, 26) having different passage cross-sections for the liquid and the air present in the container (1) in order to adjust the sprayer to provide cleaning masses with a drier or wetter foam consistency.

Abstract: Clutch and/or brake device for a machine comprising at least an element which is axially movable along an axial shaft and at least a body for the device characterised in that the axially movable element and the device body are joined by a connection device which, since the connection device is rigid relative to torsional stress about the axial shaft between the axially movable element and the body, comprises at least a flexible element attached by one of its points to the movable axial element and by another point to said body in such a way that a relative movement between the axially movable body and the body produces bending of the flexible element.

Abstract: The sprayer comprises a tank carrying the liquid to be sprayed and a motor-compressor assembly intended to supply air under pressure to the tank for the liquid, which comprises a self-contained assembly that can be coupled to the tank for the liquid and an elongate body which is introduced into the tank for the liquid and which carries an assembly of dry or rechargeable batteries, said self-contained assembly also having an upper body carrying the handle for holding the sprayer, the electric motor with its reduction gear train and the compressor, which communicates directly via an internal pipe with the inside of the tank carrying the liquid. It is intended for agriculture, gardening and other applications.

Abstract: The sprayer is characterised by an intermediate body consisting of a single injection-moulded part which comprises an external casing and an internal tubular element such that the external casing is connected to the upper portion of the container and the internal tubular body receives in its interior the pump piston, the upper front portion of the intermediate body having a recess for receiving a valve communicating with the chamber of the spray nozzle and a cylindrical enlargement for receiving the body for conveying liquid thereto; said intermediate sprayer body being extended in the portion remote from the nozzle by an enlargement for supporting the hand, and said sprayer body being closed at its upper portion by a single injection-moulded cover.

Abstract: The regulator comprises an enveloping body with a closure diaphragm on which a spring acts, said body comprising an entrance for the pressure liquid and an exit toward the pressure liquid application apparatus, characterised in that, at the bottom, the body comprises a closure plug with a graduable axial position for achieving a depressurisation position or free passage position, and, at the top, the compression spring on the diaphragm abuts against a flange of an asymmetrical intermediate body, of which the inversion brings about the two different preloading positions of the spring providing two regulator adjustment pressures.

Abstract: The system is designed for controlling the length of the smooth thrust that takes place during engagement and/or braking of the hydraulic brake-clutches for driving presses or similar machines, and in order that the smooth braking system may be overridden at a given point in time for the machine to be quickly stopped. Two safety valves (16) and (17), an emergency valve (18) and two opening and closing valves (20) and (21) are used for this purpose. A pressurestat (34) located at the end of a labyrinthine duct (35) controls the positioning of the safety valves (16) and (17) and of the emergency valve (18), the labyrinthine duct (35) lying between the pressurestat (34) and the inlet (14) of the relevant hydraulic fluid. The opening and closing valves (20) and (21) control the passage of the hydraulic fluid (oil) between the inlet and the outlet (22) area of the clutch-brake and between this area and the outlet (19).

Abstract: A piston driving a brake and a clutch is split into a main piston and a secondary piston that can travel axially and that are related through limiting bolts. The main piston has a larger surface for the pressurized fluid than the secondary piston. The main piston has a duct through which the fluid flows to the secondary piston which is in turn fitted with springs that bias it, against the fluid tension, against the main piston. Therefore, when connection is made, the secondary piston first approaches the clutch discs without actually contacting the latter. After the brake is released, there is a first connection stage at which the secondary piston approaches the main piston and a second stage, after both pistons come into contact, at which the assembly works conventionally, as a single piston.

Abstract: A brake-clutch assembly applicable as a safety element in machines having a start-stop movement, such as presses, shears and the like, has a hub which is to be mounted on a machine shaft and a brake-side cover having a cylindrical part defining a cylindrical cavity for admitting compressed air. A friction disc is mounted on the cylindrical part. The hub also carries a central piston-plate which supports two rings having frictional linings on both the brake side and the clutch side. The inner diameter of the cylindrical part is considerably larger than the inner diameter of one of the locking rings, thereby allowing a maximum power to be achieved because the cylindrical cavity defining a pressure chamber can be extended to attain a diameter close to that of the friction disc. This is achieved by removing the material in an area of the central piston-plate.

Abstract: A threaded coupling includes a male part and a female part, of which one is made of a hard material such as metal and another of soft material such as plastic. The part made of the soft material is formed with a groove at a first turn of the screw thread thereof, which receives a metallic resilient ring to define a guide portion for the part of the hard material as the latter is being threaded to another part having the ring in the groove thereof.

Abstract: One planet wheel of each pair of planet wheels of a double reduction torque converter is positioned axially intermediate the or each other pair of planet wheels, in order that the unsupported length of the interconnecting gudgeon pins is reduced to the axial thickness of the or each planet wheel intermediate the said pairs of planet wheels.