Patent ID: 6491478
Filing Date: 2002-12-10
Classification: E21D

Abstract:
By A tubular anchor, comprising a tubular member (1) having, at one end thereof facing in a setting direction, a crown-shaped drilling head (2) and at opposite end thereof facing in a direction opposite to the setting direction, load application means, and having, in a region of the drilling head (2), at least one outlet opening (5); substantially cylindrical hollow means (7) filled with a mortar mass (4) and located inside the tubular member (1), the cylindrical hollow means (7) having, at an end thereof facing in the direction opposite of the setting direction, an opening (11) enabling flow of the mortar mass therethrough and having an inner diameter corresponding at least to an inner diameter of the crown-shaped drilling head (2); and at least one longitudinal channel (12) communicating the opening (11) provided in the cylindrical hollow means (7) with the outlet opening (5),wherein the cylindrical hollow means (7) includes, a first and second piston (8, 9) for closing opposite ends thereof, respectively, and a receiving space (6) provided adjacent to the second piston (9), wherein the receiving space closes an end of the cylindrical hollow means (7) facing in the direction opposite to the setting direction, for receiving the second piston (9), and wherein the mortar mass flow-enabling opening (11) is formed in a wall portion of the cylindrical hollow means (7) defining the piston-receiving space (6) and is spaced from a free end of the piston-receiving space (6) by a distance (a) which corresponds at least to a length (1) of the second piston (9) measured in a longitudinal direction of the tubular member (1).