Is there a devise to reverse the flow to a cylinder. Not the pump. But a inline flow deverter that would shift the flow from one side of the cylinder to the other at the end of the stroke automatically without a person interjecting.ie it extends fully then the flow reverses retracting it fully. Then the flow reverses, and it extends fully and so on.Preferably, with as little lag as possible during the transition.I want the pump to run constantly(not reversing) and the cylinder to run constantly. Do not worry about the heat generated.Would love something that ran off the main cylinder(like a secondary piston or valve that would opendivert flow at the end of the stroke) through linkage. But, I am open to electronics if need be. Further more want the return to be metered so that the push and pull forces will be the same(metered through a smaller opening to adjust for the rod).Thankyou
even though this patent claims it will save money by eliminating a servo controller, it would seem to me to be an expensive item in and of itself. Other mechanisms would use linkages and lost motion to control a pilot shuttle valve. This would operate like the valve assemble for steam reciprocating pumps.
Electrically operated hydraulic changeover valve would be simplest. Then all you need is switches to operate first 1 solenoid, then the other, reversing flow. These could be as simple as microswitches operating latching relays to control the valve. An accumulator should be fitted to reduce hydraulic shock from a sudden direction change.
That I know of, there is nothing you can buy to do this...it would have to be built into the cylinder. A steam train main piston and valving does exactly as you describe, but through a linkage. You could hook up a MAC manual cylinder reversing valve (below) to a bar attached to the piston rod with adjustable stops to shift the valve at each end of the stroke. No electricity or electronics required, just air. Check with Parker for same valve for hydrualics.
Hydraulic Reversing Valve
