Coupling for shafts, has coupling with grooves which cover pressure expandable sub-portions of safety unit to transmit torque between couplings in expansion state, by applying pressure to cavity of safety unit

摘要

The grooves (12a) of a coupling (12) cover the pressure expandable sub-portions (13',13b,13b') of a safety unit (13) to transmit torque between the couplings in expansion state, through mutually opposing surfaces (13c,13d) which are frictionally active against the opposing outer surfaces (12b,12c) of the grooves, by applying pressure to a cavity (13a) of the safety unit.