| 摘要 |
<p>The device comprises a cylindrical casing (1) with a radial slot (2) over its entire height. In the slot (2) is mounted with the possibility of reciprocating movement a telescopic piston (3), whose parts (4, 5) are U-shaped and have their working surfaces (7, 8) facing the internal surface of the radial slot (2). The end-faces (9, 10) of the lateral walls of said parts (7, 8) of the piston (3) are wedge-shaped. The central part (6) of the piston (3) has the form of a wedge, whose edge is directed outwards of the radial slot (2). The piston (3) is provided with internal cavities (13, 14, 15) each of them being individually connected to a working medium feeding system and being formed by grooves made in the working surfaces (7, 8) of the parts (4, 5) of the piston (3), in the body of the cylindrical casing (1) and in the body of the central part (6).</p> |
