Patent ID: 6375154
Filing Date: 2002-04-23
Classification: F15B,Y10T

Abstract:
A hydraulic seat and holding valve for hydraulically controlling and for holding a hydraulic load, the valve comprising:a valve housing at least partially defining a first chamber and a second chamber, and comprising a generally conical valve seat positioned between the first chamber and the second chamber; a valve piston which is positioned in the valve housing and has a generally conical circumference, with the conical circumference of the valve piston and the valve seat functioning together as a seat pairing for closing the first chamber relative the second chamber to hold the hydraulic load in a substantially leakproof manner; a valve shaft that is positioned in the valve housing, supported for pivoting relative to the valve seat, and mounted to the valve piston to form a substantially inflexible unit; a seal that sealably supports a first end of the valve shaft; and a guide member in which a second end of the valve shaft is aligned, wherein the guide member is sized so that there is lateral play between the guide member and the valve housing, and wherein the valve shaft is sized so that there is lateral play between the first end of the valve shaft and the valve housing, and so that there is lateral play between the second end of the valve shaft and the valve housing, so that the valve shaft is adapted for pivoting in the valve housing.