REVERSIBLE UNION WRENCH Russian patent published in 1997 - IPC

FIELD: tool-making industry. SUBSTANCE: shaped lugs 2,3,4,5 are made on union wrench handle 1. Shaped surfaces 8,9 of jaws 6,7 are positioned for engagement with the respective pair of lugs 2,4 and 3,5. Jaws 6,7 are spring-loaded relative to each other. The connecting link is made in the form of two plates 13, 14, with handle 1 and jaws 6,7 placed between them. At installation of the wrench on a pipe jaws 6,7 turn, and when the surfaces of plates 13, 14 rest against the pipe, dies 10 envelop the latter. EFFECT: improved design. 2 dwg