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B61G1/00—Couplings comprising interengaging parts of different shape or form and having links, bars, pins, shackles, or hooks as coupling means
B61G1/22—Couplings comprising interengaging parts of different shape or form and having links, bars, pins, shackles, or hooks as coupling means having screws incorporated in the links for lengthening or shortening the couplings
B61G1/26—Couplings comprising interengaging parts of different shape or form and having links, bars, pins, shackles, or hooks as coupling means having screws incorporated in the links for lengthening or shortening the couplings and coupling when the coupling halves and pushed together; Control devices therefor