Patent ID: 6929241
Filing Date: 2005-08-16
Classification: E02B,F16K,Y10T

Abstract:
1. A hydraulic valve ( 10 ) comprising an inner tubular member ( 14 ) arranged substantially vertically with respect to an outer tubular member ( 20 ) in coaxially and concentric relationship, wherein the inner tubular member is vertically and concentrically disposed to form a defined annular space ( 11 ) with respect to the outer tubular member, the inner member is formed with a flange ( 22 ) which is adapted to cooperate to form a seal ( 21 ) at one of the ends ( 24 ) of the outer tubular member, openings ( 18 ) are provided on the surface of the inner tubular member for liquid flow, hoisting means ( 26 ) connected to the outer tubular member to enable vertical movement between the outer tubular member and the inner tubular member, whereby liquid flow through the opening occurs.