Patent ID: 6487957
Filing Date: 2002-12-03
Classification: F01B

Abstract:
A fluid-operated cylinder to provide both linear and rotary motion to tooling, comprising:(a) a cylindrical, rotatable member for attachment to rotatable means; (b) a circular piston disposed in said cylindrical, rotatable member for back and forth axial motion in a cavity defined therein and rotatable by rotation of said cylindrical, rotatable member; (c) a first port defined through said cylindrical rotatable member to introduce pressurized fluid into said cavity on a first side of said circular piston such as to cause said circular piston to move in a first direction; and (d) a piston shaft fixedly attached to said circular piston and fixedly attachable to said tooling; whereby: when said rotatable member is rotated, rotary motion will be transmitted to said tooling by said piston shaft, and when said pressurized fluid is introduced into said cavity on said first side of said circular piston, said piston shaft will cause said tooling to move in said first direction.