Back to results
US 4,287,915 AGranted
Control valve for pneumatic conduits
AssigneeDaimler-Benz Aktiengesellschaft
InventorsRudiger Hoffmann, Dieter Feichtiger
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeDaimler-Benz Aktiengesellschaft
InventorsRudiger Hoffmann, Dieter Feichtiger
Estimating the term…
A control valve for controlling a routing of a pressure medium in pneumatic conduits, especially those in motor vehicles, wherein the control valve includes a housing provided with a cylindrical recess and a control slide guided in the cylindrical recess in a longitudinally-displaceable fashion. A gasket or sealing arrangement is provided by means of which a central pneumatic conduit is alternatingly connected, after an operating stroke of the control slide, to a pneumatic conduit lying to the left and to the right of the central pneumatic conduit. The control valve further includes an operating sleeve longitudinally displaceable between two compression springs supported on the control slide and between two detent locations. The operating sleeve is arranged on the control slide in such a way that, upon operation of the operating sleeve, the control slide is braked as soon as sealing elements of the sealing arrangement abut against respective opposite valve seat surfaces. The operating sleeve during a further stroke, upon exceeding a specific resistance, is disengaged from one detent location and, upon further axial displacement, engages into the other detent location against the force or strength of one of the compression springs.
A control valve for controlling a routing of a pressure medium from a central pneumatic conduit to further pneumatic conduits disposed to the left and right of the central pneumatic conduit, the control valve including a housing provided with a cylindrical recess, a control slide means longitudinally displaceably guided in the cylindrical recess, and valve sealing means for alternatingly communicating the central pneumatic conduit with the further pneumatic conduits disposed to the left and right thereof upon execution of an operating stroke of the control slide means, characterized in that the control valve further includes two compression spring means supported on the control slide means, an operating sleeve longitudinally displaceably supported on the control slide means between the two compression springs, detent means for defining respective end positions of the displacement path of the operating sleeve, and means for enabling an axial displacement of the operating sleeve such that the operating sleeve, upon exceeding a predetermined resistance, is disengaged from one of the detent means, and, upon further axial displacement, engages in the other detent means against a force of one of the compression spring means.
Dependencies are inferred from the claim text.