Detachable coupling, typically for trailer couplings, with compressible bush expanding radially as through bolt is tightened for reduced vibration

摘要

Detachable coupling 1 is connectable to permanently attached member 2 by aligning element 11 with apertures 12. A compressible bush 3 is inserted between bolt 5 and element 11, so that when nut 7 is tightened against bolt 5 bush 3 expands radially outwardly so as to minmise vibration.