Patent ID: 6216562
Filing Date: 2001-04-17
Classification: B25B

Abstract:
A wrench comprising a hollow casing, said casing comprising a plurality of outlets disposed in communication with one another, a plurality of coupling shafts respectively mounted in the outlets in said casing, said coupling shafts each having an outer end disposed outside said casing for holding a respective tool accessory, and a transmission mechanism coupled between said coupling shafts for enabling said coupling shafts to be rotated synchronously, wherein said coupling shafts each comprise a rectangular coupling hole axially disposed at an inner end and coupled to said transmission mechanism, said transmission mechanism comprises a plurality of transmission members respectively coupled to said coupling shafts inside said casing and meshed with one another, and a plurality of adjustment elements respectively mounted in the coupling holes in said coupling shafts to force said plurality of transmissions members transmission members into engagement with one another, said each comprising a rectangular shank inserted into the rectangular coupling hole on the respective coupling shaft and supported on the respective adjustment element, and a bevel gear formed integral with one end of said rectangular shank and meshed with the bevel gear at the transmission member in an adjacent coupling shaft.