Patent ID: 7357152
Filing Date: 2008-04-15
Classification: F16K,Y10T

Abstract:
1. A releasable non-return valve, comprising: a non-return piston and a discharge piston, configured to open and close a connection between a working chamber and a connector chamber, wherein each of the non-return piston and the discharge piston may be held in a closed position by a closing spring and a working pressure; and a release piston having a release shaft, that executes a release movement upon pressurization with a release pressure, wherein the release shaft engages the discharge piston and the non-return piston in a form-locking manner by means of a free apical face of the release shaft such that the discharge piston and the non-return piston are impelled into respective open positions, the non-return piston, the discharge piston, and the release piston with the release shaft being disposed so as to be concentric to one another on a common valve axis, wherein the release shaft extends through the non-return piston in such a manner that it can slide with sealing and, for opening, engages a non-return piston base by means of a diameter tier, the non-return piston is loaded in a closing direction by a main closing spring, and the discharge piston is guided in such a manner that it can move independently on the valve axis opposite a free end of the release shaft.