Abstract: An axial adjusting device including two discs (24, 29) which are rotatable relative to one another and coaxially supported relative to one another, between which discs (24, 29) and balls (35) are guided in pairs of ball grooves (34, 39) in the discs (24, 29), wherein the depth of the pairs of ball grooves (34, 39) is variable across the circumference of the discs; one of the discs (24, 29) is axially supported and one is axially displaceable against the returning forces of a resilient spring mechanism and at least one is drivable by a motor (11) which is incorporated into a housing (52) and whose motor shaft (12) is connected to a driving pinion (15), wherein the driving pinion includes a journal projection (16) which runs in a bearing (17) which is supported in the housing (52).

Abstract: A multiple mode valve assembly including valve actuators equipped with a combination of a shaft (4) and a spindle (5), coaxial and immobilized in an axial direction, but capable of rotating freely one with respect to the other, so that by means of the spindle (5), through a threaded nut assembly (6) and the pertinent motor (9), the longitudinal displacement of the gate (3) is produced in valve opening and shutting operations, whilst by means of direct application of a rotary movement to the shaft (4), which does not affect the spindle (5), from a second motor (23), the gate (3) turns on the valve seat (2), in the shut position, producing a friction effect and consequent self-cleaning of the seal.

Abstract: An actuator including a motor in driving connection with a cam rotatable about a cam axis, the actuator further including a cam follower connected to an output member, in which powered rotation of the cam causes the cam follower to be radially displaced relative to the cam axis to provide differing output positions of the output member and in which the profile of the cam includes a radial stop which, in conjunction with the cam follower, act as a detent so that the cam follower is capable of controlling the position of the cam.