Dresser Industries, Inc.

Lothar H Grutesen

Herbert K Paetzel

Rudolf Lindackers

A control organ for gaseous and liquid media. Inside of a housing, two shut-off elements are arranged in the passageway of the medium. These shut-off elements are designed as pipes (4, 5) arranged in a manner concentrical in each other and at the cylindrical surfaces in leading manner. In each case, one of the pipes (4) is fixedly connected to the housing, while the other pipe (5) is movable in the longitudinal direction. In specified zones of their cylindrical surfaces, the pipes (4, 5) are provided with passage slots (6, 7) which take a parallel course with respect to each other. The passage slots (6) of the pipe fixedly connected to the housing (1) are at an angle which differs from 0.degree. with respect to the passage slots of the immediately adjacent movable pipe (5). The arrangement of the slots (6, 7) in the spherical surfaces is such that in the closed position, the zones of the spherical surfaces of the two pipes (4, 5) provided with slots (6, 7) do not overlap at any place. When moving one of the pipes (5), the zones of the spherical surfaces, provided with slots, of adjacent pipes overlap increasingly and permit the passage of the medium.

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Nettetal, Germany

Lothar H Grutesen