Abstract: The pneumatic cylinder includes a tubular body defining a piston chamber for a piston member, closed by front and rear heads; each head is provided with an inlet-outlet port for pressurised air, which opens out towards an annular slot coaxially arranged and communicating with the piston chamber. The piston is provided with a rod which extends through a guide bush in the front head. A pneumatic cushion is provided to control the movement of the piston at the ends of its stroke; the cushion of the front head includes a narrow passage for venting the air, and a sleeve protruding from the piston, to penetrate into an annular slot disposed coaxially around the guide bush for the piston rod.

Abstract: A variable-stroke pneumatic cylinder; the cylinder comprises a tubular casing, having fore and rear heads, defining a chamber for reciprocation of a piston member along a working stroke; at least one of the heads is provided with an air inlet/outlet hole connected to a central cavity in the cylinder head, which facing towards the piston chamber. The rear head is provided with a pneumatic damping device comprising a venting path provided with a control valve. The pneumatic cylinder also comprises head extension members to change the working stroke; the extension members are in the form of disk-shaped member secured to the cylinder head. Each disk member is provided with a central hole axially aligned with the central cavity of the cylinder head, and an air venting hole axially aligned with a venting hole branched off from the air venting path.

Abstract: A toggle lever clamping device for clamping a workpiece to a support frame; the clamping device comprises a box-shaped head to which a clamping arm is pivoted to rotate between an open and a closed condition to release respectively to lock the workpiece; the clamping arm is operatively connected to an actuator by a toggle lever mechanism having a dead center condition beyond which the clamping arm is tightened against the workpiece. The toggle mechanism comprises an elastically yieldable connection link which, upon reaching the dead center of the toggle lever mechanism is sequentially allowed to axially yield for a some degree and to deflect in a controlled mode by confronting stop means provided on the same clamping arm.

Abstract: A solenoid microvalve for fluids, of the type comprising a valve unit and a solenoid control device which can be mutually engaged and disengaged by means of a snap coupling. The valve unit comprises a sleeve for housing a movable magnetic member and a steady magnetic core member, which extend axially in a coil defining the magnetic circuit of the solenoid control device, and in which the movable magnetic core is biased, by a spring, towards a position in which it closes a flow passageway in the microvalve. The sleeve comprises a rear portion of magnetically conductive material, for circulation of the magnetic flux, which extends from one side of the valve unit, and a front portion of magnetically non-conductive material, from which the steady core member partially protrudes. The rear sleeve portion is provided with an annular slot which engages by snapping a hooking spring provided on a front side of the solenoid control device.

Abstract: A flexible control device of the push-pull type for mechanical power transmissions; the device comprises a flexible member provided by a plurality of cup-shaped elements having a central hole; a pull cable is passing through the aligned holes of the cup-shaped elements which freely slide within a sheath. Each cup-shaped element comprises semi-spherical inner surface, and a partially spherical outer surface meshing with a cylindrical outer surface along the front edge of the cup-shaped element. The device is suitable for transmitting high pushing-pulling forces for the remote control of mechanical members and devices.

Abstract: A pneumatic cylinder provided with a damping device to decelerate the piston inside a piston chamber at an end of its working stroke, while reducing the impact forces. The damping device comprises a restricted flow path for the fluid and a closing member for an inlet-outlet port which is supported by a helical spring extending from one end of the piston; an open cavity at the front end of the piston is designed to receive the closing member and/or the helical spring during damping at the end of the working stroke. Axially extending guide for the closing member are provided inside the piston chamber.

Abstract: The pneumatic cylinder comprises a tubular body defining a piston chamber for a piston member, closed by front and rear heads; each head is provided with an inlet-outlet port for pressurised air, which opens out towards an annular slot coaxially arranged and communicating with the piston chamber. The piston is provided with a rod which extends through a guide bush in the front head. Pneumatic cushioning means are provided to control the movement of the piston at the ends of its stroke; the cushioning means of the front head comprise a narrow passage for venting the air, and a sleeve protruding from the piston, to penetrate into an annular slot disposed coaxially around the guide bush for the piston rod.

Abstract: The pneumatic actuator comprises at least one double-acting cylinder having a tubular body and two closure heads which define a piston chamber for a reciprocable piston; the body of the cylinder consists of an extruded tubular section provided with at least one longitudinal conduit for the air flow, which extends in a wall between the two end portions of the tubular body. One of the closure heads at an end side of the tubular body is provided with air-flow passage for connecting one end of the piston chamber via said longitudinal conduit to an air inlet/outlet opening close to the other end side of the body. The second closure head of the cylinder is in turn provided with an air inlet/outlet opening connected to the end of the piston chamber which is opposite the previous one. The actuator is made in the form of a single cylinder or of a telescopically extending cylinder having several stages.

Abstract: A pressure equalizer device for load balancing systems; the device comprises an hollow body (16) defining a pressure equalizing chamber having fluid inlet and outlet apertures at opposite ends thereof, and a pressure release valve on the outlet side of the chamber; the pressure release valve is actuated by a floating pilot piston urged by a biasing spring to close the valve; at least one unidirectional flow passage, 23) is provided between the two side of pressure equalizing chamber to feed the pressurized fluid on both sides of the floating pilot piston of the device.

Abstract: A pneumatic, rotary, rack and pinion actuator with counter-pressure actuated damping device. The actuator comprises first and second rack and piston assemblies reciprocable inside corresponding pneumatic cylinders, which engage on the opposite sides of a pinion and output shaft. Each rack and piston assembly is provided with an axially extending duct opening at opposite ends into a drive chamber and a counter-pressure control chamber, respectively; counter-pressure control and damping means are provided in the piston-assemblies and cylinders, comprising a throttling valve opening into the control chamber and a check valve in said ducts; a thrust pin member protrudes in the control chamber and into the duct end to open the check valve and feed in a controlled manner pressurised air from the drive chamber into the control chamber, before each rack and piston assembly reaches the end of its stroke.

Abstract: A sealing device for a rodless pneumatic cylinder comprising a hollow body having an elongated chamber in which a reciprocating piston slides. The cylinder has a longitudinal slot and sealing means in the form of a flexible strip passing through a longitudinal passageway in the piston; the sealing strip has a width greater than that of the slot and longitudinally extending retaining bead members engaging and disengaging grooves inside the cylinder body, spaced apart from the central slot. The sealing strip also comprises sealing lips fitting against bevelled edges on a side of the retaining grooves. The strip is provided with a reinforcement to withstand the mechanical stresses caused by the reciprocating piston.

Abstract: A solenoid valve assembly of the type comprising a valve unit and a removable solenoid having an electromagnetic coil, a magnetic core member and a slidable plunger acting on said closing member in opposition to a biasing spring to move said closing member between opposing valve seats at the activation and deactivation of the solenoid; disengageable locking means are provided to removably connect the solenoid to the valve unit. The valve unit comprises a valve body in plastic material and a protective case in which said valve body is fitted; said case having an elongated open slot on a lateral wall opposing to the solenoid, a tube member for the plunger being sealingly connected to the valve body and comprising a flanged end portion fitted between a lateral wall of the protective cases and the valve body, said tube member passing through said open slot.