Abstract: An end seal for root manifolds at the bases of air cooled turbine blades disposed in retention slots in a turbine wheel; the end seal including an annular groove in the upstream face of the wheel having an outboard cylindrical edge outboard of the root manifold, an inboard cylindrical edge inboard of the retention slots and a slot face parallel to the upstream face of the wheel; an imperforate seal ring in the annular groove with a right circular flange adjacent the outboard edge, an annular foot engaging the groove slot face inboard of the retention slots, and a body portion defining an accordion fold in transverse cross section; and seal plate segments on the wheel over the groove.

Abstract: A clamping element comprises a single-acting cylinder and a piston with strong spring return which can be cancelled out by introduction of a pressure medium into the pressure chamber of the cylinder. The spring return is brought about, at least mainly, by means of a sleeve (6a, 6b) of rubber or rubber-like material which occupies a gap (5, 5b) between the piston (3, 3a, 3b) and the cylinder wall (7, 7a, 7b) or a lining (40) arranged in the cylinder. The rubber sleeve is firmly vulcanized, firmly glued or surface-fixed in some other manner against the cylindrical exterior of the piston and against the wall of the cylinder or the said lining along an axial length which considerably exceeds the thickness of the gap.

Abstract: A low-pressure brake booster for automotive vehicles comprises a low-pressure casing sealingly subdivided into a low-pressure chamber and a working chamber by means of an axially movable wall. The axially movable wall is connected to an axially movable control valve housing of a control valve via a transmitting sleeve having longitudinal slots. The inside diameter of the transmitting sleeve exceeds the outside diameter of a reinforcement tube interconnecting the transverse end walls of the low-pressure casing. Arranged at the end of the reinforcement tube adjacent the working chamber are radial extensions which extend through the longitudinal slots of the transmitting sleeve and are connected to the adjacent transverse end wall of the low-pressure casing.

Abstract: A lubricating valve for a moveable piston, the valve supplying lubricant at low pressure and being reversible automatically in response to a reversal of the higher pressure which drives the piston.