Georg Fischer Aktiengesellschaft

Bruno Hunziker

Bruno Hilpert

Peter Kunz

Kaspar Davatz

A ball cock including a housing of a thermoplastic material. The housing is composed of two parts which are integrally connected to each other. A ball plug is made integrally with a pivot of plastics material. The pivot is mounted in a bore extending transversely of the passage opening of the housing. A seal is provided for sealing the pivot to the outside. The plane of separation of the two housing parts extends transversely of the passage opening and through the axis of rotation of the pivot. The two housing parts have recesses at least in the region of the seal for the pivot. The recesses receive a component which is integrally connected in a tight manner with the housing parts.

Ball cock

A shut-off valve assembly includes a housing which has a spherical plug arranged in a chamber. The housing has an internal thread into which a support element for a sealing member is screwed. On the outer end face of the support element is supported a flange bushing by means of a retaining nut. The pitches of the internal thread and of an external thread for the retaining nut are directed in opposite directions, so that the support element cannot be loosened when the retaining nut is unscrewed.

Shut-off valve with spherical plug

An actuating device operated by a pressure medium, such as compressed air, acting within a housing, can be secured to a valve by a mounting member attached to the valve. The actuating device includes a first piston guided in a cylinder part positioned on one side of the center part of the housing. A toothed rack is attached to the first piston and is in meshed engagement with a pinion shaft located within the center part of the housing. The pinion shaft is connected by a coupling part to the valve shaft. The same actuating device can be used for a larger valve by placing a second piston in another cylinder part on the opposite side of the center part from the first piston with a toothed rack attached to the second piston and in meshed engagement with the pinion shaft. The first and second pistons act in opposite directions and double the torque acting on the pinion shaft as compared to the torque delivered by the first piston.

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Schaffhausen, Switzerland

Bruno Hunziker