Fluid piston and cylinder assembly for use in railway tie cutters and the like

Claim 1

IN A DEVICE FOR CUTTING TIES BENEATH THE RAILS OF A RAILROAD TRACK, A FRAME, WHEELS MOUNTED ON SAID FRAME FOR MOVING IT OVER THE RAILROAD TRACK, A WEIGHTED BLADE MOUNTED ON SAID FRAME FOR MOVEMENT TOWARD AND AWAY FROM THE TIE TO BE CUT, MEANS FOR MOVING SAID BLADE TOWARD AND AWAY FROM THE TIE TO BE CUT INCLUDING A FLUID RAM AND MEANS FOR ACTUATING IT, SAID RAM INCLUDING A CYLINDER, A FIRST PISTON RECIPROCAL IN SAID CYLINDER AND A CHAMBER IN SAID FIRST PISTON, A SECOND PISTON RECIPROCAL IN SAID CHAMBER, INLET AND OUTLET PORT MEANS IN SAID CYLINDER, PASSAGE MEANS IN SAID FIRST PISTON EXTENDING TOWARD AND OPENING ADJACENT THE CYLINDER WALL, SAID PASSAGE MEANS CONNECTING SAID CHAMBER WITH THE INLET AND OUTLET PORT MEANS WHEN THE FIRST PISTON IS IN ONE POSITION, SAID PASSAGE MEANS BEING CLOSED BY SAID CYLINDER DURING A PORTION OF THE MOVEMENT OF SAID FIRST PISTON, AN ADDITIONAL PASSAGE IN SAID FIRST PISTON CONNECTING THE INLET AND OUTLET PORT MEANS WITH SAID CHAMBER, AND A CHECK VALVE IN SAID ADDITIONAL PASSAGE.