Pivot joint for underground mining installations

摘要

A releasable pivot joint for use in underground mining installations comprises first and second connecting members. The first connection member has a width which is greater than its thickness and a reduced portion that reduces its width to a core width. The second connection member is formed with a slot into which is inserted the reduced portion of the first connection member. The width of the slot is greater than the thickness and the core width of the first connection member. The length of the slot is greater than the width of the first connection member. The thickness of the second connection member is smaller than the core width of the first connection member. The width of the first connection member extends transversely of the length of the slot when the connection members are in the connected position.