Couplings comprising mating parts of similar shape or form which can be coupled without the use of any additional element or elements

Child Classifications

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• B61G 3/02 with interengaging movably-mounted hooks or links guided into alignment by a gathering device, e.g. "Dowty" type
• B61G 3/04 with coupling head having a guard arm on one side and a knuckle with angularly-disposed nose and tail portions pivoted to the other side thereof, the nose of the knuckle being the coupling part, and means to lock the knuckle in coupling position, e.g. "A.A.R." or "Janney" type
• B61G 3/10 with coupling heads in the form of hook-like interengaging rigid jaws, e.g. "Willison" type
• B61G 3/16 with coupling heads rigidly connected by rotatable hook plates or discs and balancing links, the coupling members forming a parallelogram, e.g. "Scharfenberg" type
• B61G 3/22 with coupling heads rigidly connected by locks consisting of pivoted latches
• B61G 3/28 with coupling heads rigidly connected by locks consisting of slidable pins
• B61G 3/30 with coupling heads rigidly connected by pins having locking noses which are brought into locking position by rotating the pins