Abstract: A fluid-actuated diaphragm drive and a valve arrangement which is equipped therewith, wherein the diaphragm drive has a drive housing with two drive housing parts which are attached to one another axially. An insert body which preferably consists of plastic material and delimits at least one length section of an operating chamber which can be loaded with a fluid is inserted into each of the drive housing parts, wherein a drive diaphragm which is movement-coupled to an output member is clamped in between the two insert bodies. A seal structure which is active between at least one of the insert bodies and the drive housing is capable of preventing an axial flow around the two insert bodies in the region which lies radially between them and the drive housing.

Abstract: An operating unit for a fluid-operated diaphragm actuator, the unit consisting of a drive diaphragm, two retaining elements flanking the drive diaphragm on opposite sides and an output rod extending through these components. The drive diaphragm is mounted on the output rod by being clamped between the two retaining elements with a predetermined clamping force, wherein each of the two retaining elements is fixed on the output rod by means of a welded connection. A method that is particularly suitable for producing such an operating unit and to a fluid-operated diaphragm actuator equipped with such an operating unit.

Abstract: A pneumatic actuator for controlling a valve, having a working piston which is movably accommodated in a cylinder housing along a movement axis and delimits a working space of variable size with the cylinder housing and which is connected to a piston rod which extends along the movement axis, the cylinder housing including a first outer body with a sleeve-shaped first piston rod guide and a second outer body with a sleeve-shaped second piston rod guide, wherein the two piston rod guides are arranged spaced apart from one another along the axis of movement, the working space being bounded by the first outer body and by the second outer body, and the piston rod passing through the end of the cylinder housing, wherein the piston rod is provided with a sealing in order to form a sealing connection with the associated piston rod guide.

Abstract: An operating unit for a fluid-operated diaphragm actuator, the unit consisting of a drive diaphragm, two retaining elements flanking the drive diaphragm on opposite sides and an output rod extending through these components. The drive diaphragm is mounted on the output rod by being clamped between the two retaining elements with a predetermined clamping force, wherein each of the two retaining elements is fixed on the output rod by means of a welded connection. A method that is particularly suitable for producing such an operating unit and to a fluid-operated diaphragm actuator equipped with such an operating unit.

Abstract: A fluid-actuated diaphragm drive and a valve arrangement which is equipped therewith, wherein the diaphragm drive has a drive housing with two drive housing parts which are attached to one another axially. An insert body which preferably consists of plastic material and delimits at least one length section of an operating chamber which can be loaded with a fluid is inserted into each of the drive housing parts, wherein a drive diaphragm which is movement-coupled to an output member is clamped in between the two insert bodies. A seal structure which is active between at least one of the insert bodies and the drive housing is capable of preventing an axial flow around the two insert bodies in the region which lies radially between them and the drive housing.

Abstract: A connection device for fluid lines has an annular or sleeve-shaped insert provided for assembly by plugging in a circularly cylindrical socket in a support component. The insert comprises an annular or sleeve-shaped cage element (18) in the form of a metal bent stamping with an annular support section (27) having several claw elements (33) and several support legs (34) extending from the support section in the same axial direction. The claw elements (33) serve for securing an inserted fluid line and the support legs (34) serve for supporting a preceding seal.

Abstract: A coupling device for a fluid line has a collet and an axially movable actuating sleeve serving for operation of the collet. The collet bears several gripping teeth with associated actuating portions able to be acted on by actuating faces on the actuating sleeve in order to hold the inserted fluid line. In the non-operated state of the actuating sleeve there are at least partly different distances between the mutually associated actuating portions and actuating faces so that on actuation of the actuating sleeve several actuating portions of the collet are acted on one after the other. This means that the necessary actuating force is reduced.

Abstract: A connection device for fluid lines has an annular or sleeve-shaped insert provided for assembly by plugging in a circularly cylindrical socket in a support component. The insert comprises an annular or sleeve-shaped (18) cage element (18) in the form of a metal bent stamping with an annular support section (27) from which to the same axial side on the one hand several claw elements (33) and on the other hand several support legs (34) extend. The claw elements (33) serve for securing an inserted fluid line and the support legs (34) serve for supporting a preceding seal.

Abstract: A coupling device for a fluid line has a collet and an axially movable actuating sleeve serving for operation of the collet. The collet bears several gripping teeth with associated actuating portions able to be acted on by actuating faces on the actuating sleeve in order to hold the inserted fluid line. In the non-operated state of the actuating sleeve there are at least partly different distances between the mutually associated actuating portions and actuating faces so that on actuation of the actuating sleeve several actuating portions of the collet are acted on one after the other. This means that the necessary actuating force is reduced.

Abstract: A coupling device for a fluid line has a collet able to be operated by an actuating sleeve. The collet possesses an annular base portion with support arms extending axially from it, on which two gripping teeth are arranged which are axially spaced apart least in part. Each gripping tooth is provided individually with its own actuating portion to be acted on by actuating faces on the actuating sleeve to cause a clamping operation.

Abstract: A union for which may be secured by press fitting in a housing recess (6). It possesses an insert (12) which comprises holding means (17) having at least one sleeve-like insert body (15) and holding means (17) serving for holding a fluid line to be connected. For fixing the the insert (12) a separate attachment ring (28) is provided, which may be press fitted in the housing recess (6) and which in the press fitted state is in front of at least one support face (32) on the insert (12), said support face facing in a direction opposite to the direction (13) of insertion.

Abstract: A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20).

Abstract: A polymeric component (1) having a bore (2) to receive a shaft (3), the component (1) having, in the zone (4) around the bore (2), substantially plane and parallel end faces disposed perpendicular to the bore axis, the component being clamped between substantially radial abutment surfaces (5,6) of the shaft (3), characterized in that a number of axially continuous metal pins (7) distributed over the periphery are disposed in the zone (4) around the bore (2) and bear by their ends on the abutment surfaces (5,6) and a method of producing the same.