Power-driven wrench apparatus

A new and improved power-driven wrench apparatus, comprising:

• a housing assembly which includes a gear box portion, a pair of flexible shaft retention portions that extend outwardly from said gear box portion, and respective bearing supports located on said flexible shaft retention portions, wherein said flexible shaft retention portions lie in a first plane,
• a wrench head bearing assembly supported by said bearing supports of said housing assembly,
• a first gear assembly supported by said gear box portion of said housing assembly, said first gear assembly receiving power from a power source,
• a pair of flexible-shaft gear assemblies, each of which includes a respective driven gear which meshes with said first gear assembly, a respective flexible shaft connected to said respective driven gear, and a respective worm gear end connected to said respective flexible shaft, said respective driven gears being housed in said gear box portion of said housing assembly, and said pair of flexible-shafts and said-respective worm gear ends being housed in said flexible shaft retention portions of said housing assembly, and
• a cylindrical wrench head assembly supported by said wrench head bearing assembly on said flexible shaft retention portions of said housing assembly, said cylindrical wrench head assembly including a circumferential array of gear teeth for meshing with said respective worm gear ends of said flexible-shaft gear assemblies, such that said worm gear ends of said flexible-shaft gear assemblies rotate said cylindrical wrench head assembly around a central longitudinal axis which is perpendicular to said first plane in which said flexible shaft retention portions of said housing assembly lie.