Abstract: In an anti-lock automotive vehicle brake system comprising a vacuum brake power booster, a considerable reduction of manufacturing and assembling costs is obtained while the system's reliability in operation is simultaneously augmented by the incorporation into this brake system of a second movable wall arranged within the vacuum brake power booster to which a controllable pressure differential may be applied. The wall isolates two pneumatic working chambers and, in the case of slip control, is movable in a direction opposite to the actuating direction of the master brake cylinder by two compensating cylinders which are connected with the master brake cylinder pressure chambers. A hydraulic chamber which is normally in communication with an unpressurized pressure-fluid supply reservoir is sealed from the reservoir by a retention valve during slip control to hydraulically prevent brake petal induced pressure from being applied to the master cylinder.

Abstract: A vacuum brake power booster and method of manufacture is disclosed. The booster includes a guide sleeve in a bore in the control valve casing. A radial flange of the guide sleeve guides the push rod and is supported axially within the axial bore of the control valve casing. The guide sleeve is axially embraced by a retaining member in positive engagement therewith with the retaining member being positively connected to the control valve casing.

Abstract: Disclosed is an electromagnetically actuatable three-way/two-position directional control valve for alternatively connecting an outlet port to a first or to a second inlet port. The connection is established by way of a valve chamber with which the outlet port is in direct communication. The inlet ports each communicate with the valve chamber by way of sealing seats adapted to be closed or opened by means of a movable valve closure member. At least one electromagnet whose housing accommodates a magnet coil as well as a slidably disposed armature which, when the electromagnet is excited, actuates the valve closure member by way of a valve-actuating tappet. A connection is established between the second inlet port and the outlet port in the inactive position of the valve closure member.

Abstract: A brake system for automotive vehicles is disclosed comprising a vacuum brake force booster operatively located between a brake pedal and a master brake cylinder. The vacuum brake force booster includes at least two working chambers separated from one another by a membrane plate, one of the working chambers, through a master magnetic valve, being in communication with a vacuum source and the other working chamber being vented through a control valve acutable by the brake pedal to generate a brake force proportional to the brake pedal force. Connected to the master brake cylinder are brake circuits applying pressure to the wheel brake cylinders. Sensors associated with the wheels detect the rotational behavior of the wheels to identify a locking condition.

Abstract: A power brake booster, in which the valve piston is slidably supported in the control hub and cooperates with the poppet valve, that is formed of any rubber-elastic material. The poppet valve is designed as a cone valve. Thus when the valve passage is opened, atmospheric air enters the working chamber from the air chamber through the opening, that is arranged in the control hub transversely to the booster's longitudinal axis, to flow in almost undisturbed and without turbulence. To ensure a reliable sealing seat, the peripheral surface of the truncated-cone-shaped end of the valve piston is equipped with a curcumferential groove, the one lateral wall of the groove forming together with the peripheral surface a sealing edge which reliably abuts on the plane plate surface of the poppet valve when the valve is closed.

Abstract: Sauce hollandaise, sauce bearnaise or similar fancy sauces, dressings, batters or soups are prepared by maintaining a supply of mixture of ingredients including butter or margarine, flour, milk, wine, vinegar, spices, salt, egg yolks and/or others in a state of readiness at a temperature of less than 50.degree. C., drawing by a pump a desired quantity of mixture from the supply and automatically mixing the withdrawn material with air in requisite quantities and simultaneously homogenizing the mixture of withdrawn material and air so that the ultimate product is of foamy consistency. Large quantities of prepared mixture can be stored in deep frozen condition, and batches of deep frozen mixture are defrosted as the need arises. The pump which draws mixture from the supply can be used to draw a stream of washing and/or rinsing liquid when the pump, its mixture supplying conduit and the homogenizing unit are to be cleaned.