US 6,186,175 B1Granted

Rocker valve with pneumatic pre-control

AssigneeHygrama AG

InventorsHerbert Frisch, Josef Vollmer

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Abstract

A rocker valve with pneumatic pre-control includes a housing (G) with the pressure means connections (P, A, R, Ps), at least one rocker in the housing which is movable between two final positions about an axis and works together with at least one sealing surface for at least two pressure means connections, where one handle of the rocker can be impacted with a pre-control pressure via a pre-control connection and the rocker in one final position connects one working connection (A) with the supply connection (P) and in the other final position with the ventilation connection (R). To achieve the greatest simplicity of construction and space-savings, the highest possible operational security through the best possible sealing-off of the connections and precision as well as short switching times, two working connections (A1,A2) are provided, from which in each of both of the final positions of the rocker one working connection, respectively, is covered by the rocker and the sealing surface, where a working connection (A1) is separable through the rocker from a supply connection (P) and the second working connection (A2) is separable through the rocker from a ventilation connection (R)

Claims24

Dependent claims

Rocker valve with pneumatic pre-control, comprising a housing with pressure connections, in which housing at least one rocker is arranged which is movable between two final positions about a pivoting axis solely by the pressure of at least one pressure medium fed to the valve via supply pressure connections, a sealing element being provided between the edge of the rocker and the inner wall of the housing at least on one side of the rocker as well as along the axis of the rocker, the housing including on each side of the rocker at least one pair of working pressure connections, said pairs of working pressure connections being arranged all on the same side with respect to a plane defined by the rocker, one working pressure connection of each of said pairs being provided with a valve seat oriented towards the rocker, the housing further including at least one further opening on an opposite side to said pairs of working pressure connections with respect to the plane defined by the rocker, through which at least one further opening at least one handle of the rocker can be impacted with pre-control pressure, the rocker in each of its final positions closing one of the valve seats of each pair of working pressure connections while opening the other one at maximal diameter.

Dependencies are inferred from the claim text.