Patent ID: 6131876
Filing Date: 2000-10-17
Classification: F16K

Abstract:
A valve comprising a valve housing (1) with a duct (2) that can be optionally opened or closed, a valve body (4) connected to the valve housing (1) and a valve spindle (3) that is displaced in relation to the valve body (4) from a first position, where the valve spindle (3) closes the duct (2) by tightening against a sealing surface (5) in the valve housing (1), to a second position where the valve spindle (3) keeps the duct (2) open by the valve spindle (1) being at a distance from the sealing surface, which valve comprises a flange part (15) that surrounds the valve body (4) and is arranged to be displaceable in relation to it between a first position and a second position to support the valve spindle (1) alternatively in said two positions, whereby at least one displacement element (11-13) is arranged to be displaced from a first locking position where the displacement element (11-13) abuts on the wall (6,7) of opening (8-10) in the valve body (4) and on the inner wall (14) of the flange part (15) at a first position of the inner wall to a second release position, where the displacement element (11-13) is released from said locking position, as the flange part (15) is displaced from the first position to the second position, whereby the displacement element (11-13), when the flange part (15) is in the first position, is arranged to bear against a first abutting section (16) in a form part (17) in the valve spindle (3) to keep the valve spindle (3) from being displaced from the first position to the second position, and when force is applied to the flange part (15), the flange part (15) is arranged to glide in relation to the valve body (4) from the first position to the second position to release the displacement element (11-13) from the first abutting section and bring the displacement element (11-13) to the second position, wherein the valve spindle (3) is arranged to be displaced from the first position to the second position by pressure operating in the duct (2) as the flange part (15) is displaced so that the displacement element (11-13) is displaced from the first position to the second position, and that the valve body (4) comprises a passage (20) leading from an inlet (21) to a pressure chamber (22), which is defined by the valve body (4) and the flange part (15), to pressurize the pressure chamber and hereby apply said force against the flange part (15) and displace it so that its second portion comes to bear against the displacement element (11-13).