公开(公告)号：WO2007103725A3

公开(公告)日：2008-01-10

申请号：PCT/US2007063068

申请日：2007-03-01

Applicant: DAVIDSON HYDRANT TECHNOLOGIES

Inventor： DAVIDSON THOMAS DEWEY SR ,  FERRARI ANTHONY ,  WALDEN DAVID MICHAEL ,  ROSE MATTHEW JESSE

IPC: E03B9/14

CPC classification number: E03B9/14 ,  A62C37/20 ,  E03B9/16 ,  F16K15/188 ,  F16K27/006 ,  Y10T137/5327 ,  Y10T137/5485 ,  Y10T137/7929

Abstract: The present invention relates to a fire hydrant having, a primary valve (602) and a secondary valve (604). An actuator rod (608) is provided to open and close the valves whereby the actuator rod has an additional structure for allowing air to reach the area of the fire hydrant below the secondary valve. Various embodiments include an actuator rod with openings (626) and hollow portions (624) and configured to provide air from the area of the hydrant above the secondary valve to the area of the hydrant below the secondary valve. In some embodiments of the present invention, a check valve (700) is provided with the actuator rod that is adapted to prevent the flow of fluid in at least one direction.

Abstract translation: 本发明涉及一种具有主阀（602）和次阀（604）的消防栓。 提供致动器杆（608）以打开和关闭阀，由此致动器杆具有用于允许空气到达次级阀下方的消防栓区域的附加结构。 各种实施例包括具有开口（626）和中空部分（624）的致动器杆，并且构造成将空气从次级阀上方的消防栓的区域提供到次级阀下方的消防栓的区域。 在本发明的一些实施例中，止回阀（700）设置有致动器杆，其适于防止流体沿至少一个方向流动。