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 IPC+CPC Available in IPC and CPC
• 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 IPC+CPC Available in IPC and CPC
• B61G 3/10 with coupling heads in the form of hook-like interengaging rigid jaws, e.g. "Willison" type IPC+CPC Available in IPC and CPC
• 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 IPC+CPC Available in IPC and CPC
• B61G 3/22 with coupling heads rigidly connected by locks consisting of pivoted latches IPC+CPC Available in IPC and CPC
• B61G 3/28 with coupling heads rigidly connected by locks consisting of slidable pins IPC+CPC Available in IPC and CPC
• B61G 3/30 with coupling heads rigidly connected by pins having locking noses which are brought into locking position by rotating the pins IPC+CPC Available in IPC and CPC