Two-way plow

Claim 1

A TWO-WAY PLOW COMPRISING A CARRIER FRAME HAVING A REARWARDLY EXTENDING PART, A STANDARD FRAME CARRYING RIGHT- AND LEFT-HAND PLOW BOTTOMS, AND INCLUDING A FORE-AND-AFT EXTENDING PART ROCKABLE ABOUT SAID REARWADLY EXTENDING PART BETWEEN RIGHT-HAND AND LEFT-HAND PLOWING POSITIONS, A HYDRAULIC RAM UNIT SWINGABLY CONNECTED AT ONE END TO SAID CARRIER FRAME AT A POINT ABOVE SAID REARWARDLY EXTENDING PART AND AT ITS OTHER END TO SAID STANDARD FRAME AT A POINT THAT LIES DIRECTLY ABOVE SAID FIRST POINT OF CONNECTION WHEN THE STANDARD FRAME IS IN A MIDPOSITION, RETRACTION OF SAID RAM UNIT ACTING TO SWING SAID STANDARD FRAME FROM EITHER OF ITS PLOWING POSITIONS UPWARDLY TO ITS MIDPOSITION AND EXTENSION OF SAID RAM ACTING, WHEN THE STANDARD FRAME IS MOVED A SLIGHT DISTANCE AWAY FROM ITS MIDPOSITION TOWARD ONE OF ITS PLOWING POSITIONS, TO SHIFT SAID STANDARD FRAME OVER TOWARD SAID ONE PLOWING POSITION, AND REVERSIBLE VALVE MEANS ACTUATED BY MOVEMENT OF SAID STANDARD FRAME THROUGH ITS MIDPOSITION TO CHANGE THE DIRECTION OF PRESSURE FLUID FLOW TO SAID RAM UNIT.