Schaltelement für hydraulische oder pneumatische Steuerungssysteme

摘要

A pneumatically or hydraulically operated fluidic logic device wherein a housing defines a ring-shaped chamber which communicates with fluid-supplying and fluid-discharging first and second passages as well as with a third passage for admission of a control fluid stream at a variable pressure. An elastically deformable split ring is received in the chamber with freedom of radial movement to seal the first and second passages from each other in response to a rise of fluid pressure in the third passage. The third passage has one or more channels machined into the surface which surrounds or is surrounded by the chamber, and each of the first and second passages has one or more channels machined into the surface which is surrounded by or surrounds the chamber. The split ring can be expanded to seal the first and second passages from each other if the channels of these passages are provided in the surface which surrounds the chamber, and the split ring is caused to contract and to thereby seal the first and second passages from each other if the channels of the first and second passages are provided in the surface which is surrounded by the chamber.