Patent ID: 6340148
Filing Date: 2002-01-22
Classification: F16K

Abstract:
A valve handle that prevents the valve from being mistakenly turned on, the valve comprising:a fixing ring that mobilizes a valve stem and causes the valve stem to ascend or descend, the fixing ring having at least one stopper; and a knob housing that covers and drives the fixing ring, a top inner side of the knob housing having at least one protrusion that works with the stopper of the fixing ring, the protrusion having a first vertical plane, a second vertical plane and a slant plane; wherein as an operator turns the knob housing in a first direction, the first vertical plane pushes the stopper and moves the fixing ring in the first direction, making the stem descend to place the valve in a closed state; and as the operator turns the knob housing in a second direction, the slant plane slips past the stopper and so is unable to move the fixing ring so that the valve is difficult to turn to an open state; wherein the valve is turned to the open state by an operator pushing downward on the knob housing and simultaneously turning the knob in the second direction, causing the second vertical plane to interact with the stopper, moving the fixing ring and the stem so as to make the stem ascend.