Fag Kugelfischer Georg Schafer

Hermann Bauer

Norbert Spielmann

Udo Gussbacher

Eckhart Rudiger

Rainer Porzel

Wolfgang Walter

Wolfgang Walther

A vacuum breaking-force booster has a sequential control valve without a response path. First and second pressure chambers are separated by a diaphragm with a diaphragm disk in it and the diaphragm disk is connected with a shaft that supports a radially inward valve seat which presses against a spring biased sealing disk. Communication between the first and second chambers is past the inner valve seat. A shiftable sleeve extends through the lid of the first of the chambers and includes a collar which engages the inside of the lid for determining the maximum extend the sleeve can move out of the lid. A pressure piston extends through the sleeve. A bridge connects the sleeve with the pressure piston for moving together. An elastomeric bellows attaches the sealing disk to the sleeves and the pressure piston; the outer valve seat is defined on the sleeve for engaging the sealing disk. A spring normally urges the sealing disk toward both of the valve seats. A second flow path in the booster extends from the atmosphere through the bridge past the outer valve seat and into the first chamber. In an alternate embodiment, the outer valve seat is directly on the sleeve and the inner valve seat is directly on the valve shaft connected with the diaphragm disk. There is a return spring communicating with the diaphragm disk for urging the diaphragm disk to move the inner valve seat toward the sealing disk.

Vacuum braking-force booster

An assembly of a master brake cylinder and an associated power cylinder of larger diameter, disposed in front of the dashboard, is held together under tension by a stirrup-shaped retainer with a bight embracing the free end of the master cylinder and two legs anchored to the dashboard, these legs traversing the power cylinder. A roll membrane inside the power cylinder, forming a flexible partition that divides its interior into two chambers between which a pressure difference is developed to operate the master cylinder, has cuffs attached to two guide tubes rigid with at least one wall of the power cylinder, these tubes being traversed by the retainer legs.

Mounting for power-assisted master brake cylinder in an automotive

An assembly of a master brake cylinder and an associated power cylinder of larger diameter, disposed in front of the dashboard of an automotive vehicle with an extension traversing that dashboard, is held together by a flexible retainer such as a strap or a wire embracing the master cylinder and at least part of the outer periphery of the power cylinder under tension. The extremities of the retainer may be anchored directly to the dashboard and its center part is braced against the front end of the master cylinder by an adjustable tensioning device.

A transmitter cylinder is used in a hydraulic system and particularly the ake system of an automotive vehicle. To prevent undesired access into the transmitter cylinder, a lock part is installed at the pedal facing end of the cylinder. The lock part is an annulus. The pedal connected piston extends through the lock part and into the transmitter cylinder. The annular lock part is shaped so that its inner bore will guide and center the piston projecting into the cylinder. A locking element for holding the lock part in the cylinder bore is defined. It is either a radial projection from the lock part or it is a retaining ring held in a groove on the exterior of the lock part. In either case, the locking element projects into a groove defined in the interior of the cylinder bore, which retains the lock part in the cylinder bore against undesired extraction. The lock part may be a hollow annulus or a solid body. The lock part is appropriately configured to permit its extraction with appropriate tools.

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Lulsfeld, Germany

Hermann Bauer