Double-acting hydraulic exerciser

摘要: A double-acting, hydraulic exerciser composed of two telescoping tubes having handles attached to the ends thereof. The inner tube defines a chamber which is oil-filled and encloses piston whose actuating rod handle end outer tube. divides into right left sections provided with valves that function alternately allow oil pass from section when are brought together by in compression stroke, pulled apart an expansion stroke. Because incompressibility oil, motion strokes linear affords uniform resistance throughout entire length each so exercising effect even free strain both traction expansion.