Mine roof support
Реферат: 1,060,966. Setting devices for mine roof supports. M. VON LINSINGEN, [trading as BOCHUMER EISENHUTTE HEINTZMANN & CO.]. June 9, 1964 [Sept. 21, 1963], No. 23899/64. Heading E1E. A mine arch comprising overlapping flanged channel members 1, 2 held by clamps 3 is preloaded against the roof by a removable hydraulic cylinder 4 whose foot 9 abuts the upper end of member 1, the piston 6 carrying pulling means 5 hooked on to the lower end of member 2. A finger 10 on the foot 9 engages between the members 1, 2. The means 5 may comprise a wire rope or a pair of rods or plates and is removably attached to the piston 6. The cylinder 4 may be single- . or doubleacting.
Method for the preassembly and simultaneous erction of two or more neighbouring initially shortened mine roof supporting arches and a retaining member for practicing the method
Номер патента: GB2013264B. Автор: . Владелец: Bochumer Eisenhuette Heintzmann GmbH and Co KG. Дата публикации: 1982-09-08.