Hydraulically operated attachment for machine tools

In combination, a machine tool having means for supporting and rotating a work piece and having a slide movable toward said work piece, a hydraulic pump, means for driving the pump, a rotary hydraulic motor mounted on the slide for movement therewith and having a fluid connection with said pump so as to be driven by fluid discharged by the pump, said motor having a rotary output shaft, means supporting a set of intermeshed gears, one of said gears being connected to said output shaft for rotation thereby, another of said gears being connected to a tool shaft for rotating the same, and a cutting tool secured to said tool shaft for rotation thereby, said means for driving the pump being driven by the means for rotating the work piece and being continuously actuated thereby, and said motor being continuously actuated by said pump.

An attachment for a machine tool that has means for supporting and rotating a work piece, a slide movable toward the work piece in a direction generally transverse to the axis of rotation of the work piece, means for moving the slide, and a source of pressurized hydraulic fluid, said attachment comprising a closed housing, a hydraulic motor separate of the housing but fixedly attached thereto for movement therewith and having means for being fluidly connected to said source, said motor having a rotary output shaft, said housing enclosing a set of intermeshed gears, one of said gears being connected to said output shaft for rotation thereby, a tool shaft connected to another of said gears for rotation thereby, said tool shaft having a portion extending from one side of the housing and having means thereon for securing a tool to said tool shaft for rotation thereby, said housing having abutment means thereon for connection to said slide for movement therewith.