LOAD-BEARING MEMBER Russian patent published in 2003 - IPC

FIELD: mining industry, design of load-bearing member, in particular. SUBSTANCE: salient feature of invention lies in that peripheral parts of body of load-bearing member are linked to central part by groove- and-protrusion joint, outer surface of each part has groove made along its generating line where fixing plate with fastening holes meant for connection of plate to parts of body is placed. Spreading inserts and inner sides of central split part of body corresponding to them have variable section which angle of opening diminishes as distance from pipe union supplying working substance grows, guiding groove is cut in inner surface of body. Bosses of spreading inserts are mounted in this groove for movement along it. Slot in guiding body is cut in parallel to plane of split of body of load-bearing member and in locking yoke where pipe union supplying working substance to flexible chamber is installed. Groove intended for placement of wedge- out pick is made along generating line of flexible chamber in plane of spreading inserts. Recesses are made in faces surfaces of spreading inserts. EFFECT: more efficient distribution of pressure between working parts of load-bearing member in process of operation, prevention of premature seizure and destruction of load-bearing member, increased functional reliability and simplified design of load-bearing member. 3 cl, 5 dwg