Abstract: A valve features a deflectable actuating element (1) that controls the movements of at least one actual sealing element (3) for opening and/or closing at least one sealing contour (6), and the actuating element is loaded via an elastic element (5) essentially perpendicularly relative to the direction of the deflection; and the longitudinal axis of the actuating element and the force applied by the elastic element are aligned in a position of the actuating element that is between its two extreme positions. The actuating element (1) is preferably an unilaterally loaded piezoelectric bending transducer, and the sealing element (3) is preferably a toggle that has the ability to swing around an axis arranged perpendicularly relative to the direction of the deflection of the actuating element (1).

Abstract: Valve with a displaceable actuating device that controls the movements of at least one actual sealing element for opening and closing, and the actuating device is loaded with an elastic element essentially in a perpendicular direction relative to the direction of displacement, and the longitudinal axis of the actuating device and the force exercised by the elastic element are aligned in one position of the actuating device between its two extreme positions. In order to realize a valve that can be electrically switched using minimal currents and that is characterized, in particular, by its small construction size but that is still able to achieve large regulating distances, the actuating device is a unilaterally constrained piezoelectric bending element.

Abstract: A working cylinder (A) having at least one working chamber (6, 7) defined by the cylinder barrel (1), at least one of the end sections (2, 3) and a piston (4), at least one supply port (9a, 9b) and a exhaust port (12a, 12b) for the working medium. The exhaust port (12a, 12b) has a valve (13a, 13b) that may be regulated by the pressure of the working medium, which is applied at the supply port (9a, 9b) in order to obtain a smaller dimension of at least the valve and to better utilize the already existing space, specifically within the cylinder, and to better and more efficiently adjust the output capacity of the individual elements. A valve (V), particularly a switch valve (W) of a rocker valve design has therefore at least one inlet (16) and at least one outlet (17a, 17b) for the working medium, as wells as at least one control port (18).

Abstract: In a piston rod-less pneumatic cylinder, the longitudinal slot (1) is sealed from the inside on either side of the piston with a sealing tape (3) which exhibits fixing elements (9) that engage a fixing edge (10) provided on the cylinder with a positive fit to secure the sealing tape (3) given an unpressurized interior. This ensures a reliable sealing of the interior even in an unpressurized state, and prevents leaks from starting when a previously unpressurized interior is pressurized.

Abstract: In a piston rod-less pneumatic cylinder, the sealing tape (5) sealing the lateral longitudinal slot (3) from the inside on either side of the piston (2) is held by an outer band (6) covering the longitudinal slot (3) from outside with the cylinder interior (9, 10) in an unpressurized state. To reduce the forces necessary to engage or disengage this fixing joint, fixing elements (16, 17) interact in a purely frictionally engaged manner on the sealing tape (5) and outer band (6).

Abstract: A working cylinder (A) having at least one working chamber (6, 7) defined by the cylinder barrel (1), at least one of the end sections (2, 3) and a piston (4), at least one supply port (9a, 9b) and a exhaust port (12a, 12b) for the working medium. The exhaust port (12a, 12b) has a valve (13a, 13b) that may be regulated by the pressure of the working medium, which is applied at the supply port (9a, 9b) in order to obtain a smaller dimension of at least the valve and to better utilize the already existing space, specifically within the cylinder, and to better and more efficiently adjust the output capacity of the individual elements. A valve (V), particularly a switch valve (W) of a rocker valve design has therefore at least one inlet (16) and at least one outlet (17a, 17b) for the working medium, as wells as at least one control port (18).

Abstract: A rocker valve with pneumatic pre-control includes a housing (G) with the pressure means connections (P, A, R, Ps), at least one rocker in the housing which is movable between two final positions about an axis and works together with at least one sealing surface for at least two pressure means connections, where one handle of the rocker can be impacted with a pre-control pressure via a pre-control connection and the rocker in one final position connects one working connection (A) with the supply connection (P) and in the other final position with the ventilation connection (R).

Abstract: A piezoelectric bending element is sealingly insertable into a chamber in a housing and controls with its free end at least one sealing seat corresponding to an applied control current. The bending element has a covering made of partially elastic insulating material and which also seals off the chamber at the proximal end. The bending element is electrically insulated and sealed off against the medium to be controlled, and electrical contacts lie outside of the working area of the valve.

Abstract: A pneumatic or hydraulic cylinder (1) includes a cylinder tube (3) consisting of a non-ferromagnetic material in which a piston moves. At least one longitudinal channel (9) is recessed in the outer surface of the cylinder tube in which a signal transmitter (8) is secured to scan the piston location without physical contact. A permanent magnet is located on the piston which activates the signal transmitter (8) by its magnetic field. A leaf spring (17) is provided to secure the signal transmitter (8) in the longitudinal channel (9) and is attached to the housing of the signal transmitter by means of a screw (12) and a nut (19) with an inclined surface (20) that moves outward against the wall of the longitudinal channel (9) when the screw is tightened and thus tightly clamps the signal transmitter (8). The attaching device, consisting of the screw (12) with nut (18) and leaf spring (17), and the signal lead (10) are positioned on the same end of the signal transmitter (8).

Abstract: A membrane dryer apparatus for moist air includes a housing (1) that contains a tubular fabric strand bundle (7) of tubular fabric strands (8) made of selective absorption material through which air to be dried flows, water vapor diffusing through the fabric and collecting on its outside. A portion of the dried compressed output air is channeled off near the discharge (12) of the membrane dryer and passed through a scavenging air duct (14) having a throttle (16) and passed around the outside of the fabric strand bundle to scavenge moisture and remove it through discharge openings (17, 18) to the outside air. To limit consumption of scavenging air, an independent shut-off valve (19), working as an airflow sensor, is installed in the output air duct (13), and this shut-off valve (19) opens only when output air is actually extracted by a user.

Abstract: A microvalve for controlling a fluid flow comprises a valve body provided with a valve opening having a sealing edge, and a valve plate provided with fluid openings. The valve plate is adapted to be moved perpendicularly to the valve body in such a way that, at a first position, said valve plate closes the valve opening, whereas, at a second position, it is perpendicularly spaced from said valve opening in such a way that a flow cross-section defined by said valve opening and said valve plate is decisively determined by the distance between the sealing edge and the valve plate. The contour of the sealing edge of the valve opening is chosen such that the length of the sealing edge exceeds the length of a sealing edge of a square valve opening which is equal in area.

Abstract: A device for limiting the prestress of a control spring (17) which is particularly well-suited for pressure control valves and similar equipment, the control spring (17) being located in a spring housing (15) and supported on a spring plate (18) which can be adjusted by means of a rotating adjustable spindle (19) that is provided with a thread for prestressing the control spring (17), includes an end stop (22), which, by means of its own adjusting device which can be operated from outside the spring housing (15), can be adjusted and locked at any desired location between two end positions. When the spring plate (18) is moved in the direction which increases the prestress of the control spring (17), the spring plate (18) makes contact with the locking end stop (22), as a result of which the prestress of the control spring (17) is restricted to the preselected value.

Abstract: For the oscillating triggering of a double acting operating cylinder (4), a reversing valve (6) has been provided and has been inserted between the pressure supply connector (5) and the two operating cylinder drive connectors (2,3) that is driven via two NOT elements (7,8), that each have been assigned to an operating position and connected with a drive connector (2,3). The reversing valve (6) is caused by pressure to periodically switch between the two operating positions. In order to stop oscillating with a defined final position of the operating cylinder (4) or start it up again, at least one of the NOT elements (7) has been provided with a pressure supply connector that can be triggered independently from the supply connector (5).

Abstract: A pneumatic actuating arrangement with a plurality of consumers (1) having working areas (7,8), a plurality of feed air/signal distributors (13) connected to a common pressure source and a common control unit (19), a plurality of electrically-actuated switching devices respectively arranged directly at the consumers (1) forming separate consumer units (9), and a combination line (12) extending between each consumer unit (9) and a feed air/signal distributor (13), each combination line including a supply pressure line for supplying air to the working areas of a respective consumer and electrical signal lines for connecting the electrically-actuated switching devices of a respective consumer unit to said common control unit.

Abstract: A rodless pressure cylinder (1) has a cylinder housing (2) with a longitudinal slot (6) through it and is closed on each end by a cylinder cap (12). The longitudinal slot (6) is sealed on its inside by an inner sealing strip (7) and as necessary is also covered on its outside by an outer sealing strip (8). The provided sealing strips (7,8) are fastened by special clamping elements (11), in or on the longitudinal slot (6). The cylinder caps (12) are provided on each side with connectors for the feed and discharge of pressure medium. Since the sealing strips (7,8) are fastened by the special clamping elements (11) independent of the caps (12), the cylinder caps (12) can be installed in various positions on the cylinder housing (2). They are constructed rotationally symmetrical for this purpose, which is particularly valid for the pressure medium channels in the interior of the cylinder caps (12).

Abstract: A linear drive apparatus comprises a cylindrical casing having a longitudinal slot. A piston is located in an inner chamber of the apparatus and can be moved in longitudinal direction by differential pressures. This piston includes a projection extending through the longitudinal slot. The outer side and the inner side of the longitudinal slot are sealed off by a sealing strip. An air connector is in communication with the space between the two sealing strips, allowing the production of a vaccum or of an overpressure in the mentioned space.

Abstract: The pressurized medium cylinder has a longitudinally extending slot. The steel strip located for sealing purposes at the inner side of the surface of the cylinder and arrested by means of magnets is equipped with an injection molded plastic encasing, which forms at the outer side of the steel strip a plastic material strip which centers the steel strip relative to the longitudinal slot.

Abstract: An attachment arrangement for attaching an object (4), for instance a rail, such as a support rail, brake rail, mounting rail or the like, onto a piston-cylinder control device (1), the cylinder of which has two undercut grooves (3) extending along at least one of its sides, these grooves being parallel with one another and therewith also with the cylinder axis. The object (4) is provided with two parallel ridges or keys (5), each of which is intended for locking coaction with a respective undercut groove (3). At least one wedge-shaped, elongated device (6) is arranged between the outside of the cylinder (1) and the object (4), in connection with each pair of coacting grooves (3) and ridges (4). Means (9) are provided for moving the wedge-shaped devices (6) in a direction transversely to the cylinder axis, so that these devices (6), in engagement with oblique surfaces (7) on the cylinder (1) and/or the rail (4), will fixate the rail in a position parallel with the cylinder axis.

Abstract: A piston rod-free pressure cylinder, in which a force reducer (15) is connected by means of a lateral projection (14) to the working piston (13), has a brake mechanism (19), which acts with a brake lining (27) on the outside of the pressure cylinder (11). Action takes place in such a way that no transverse forces are exerted on the projection (14).