Patent ID: 6363960
Filing Date: 2002-04-02
Classification: A01K,E03B,F16K,Y10T

Abstract:
Anti-freezing device for preventing the freezing of a water pipe forming a flow path for water, disposed outdoors or in temporarily undercooled rooms, andhaving a pressure control valve (2) which has a valve housing (3) and which has at least one valve seat (12) therein which is in communication with the pipe and interacts with a valve body (10) so as to seal the pipe, where the valve body is prestressed by a pressure spring into a closed position such that the pressure control valve is normally closed and opens when the pressure within the pipe increases as a result of the water freezing so as to drain a water quantity from the pipe, wherein; the pressure spring has a variable tension set by an adjusting screw; the valve seat (12) is disposed at an upper portion of the valve housing (3); the valve housing (3) removably secured to a branch which is in communication with the pipe, having a plurality of discharge openings (18) provided in a wall of the valve housing, where the valve body in the closed position seals the discharge openings (18) relative to the valve seat (12); the valve body (10) on its surface area (19) has at least one sealing ring (20) which seals a ring gap between the valve body and an inside wall of the valve housing; and the plurality of discharge openings (18) are in an area between the valve seat (12) and the sealing ring (20).