×

HYDRAULIC APPARATUS WITH DIRECT TORQUE CONTROL

  • US 20110196509A1
  • Filed: 12/16/2010
  • Published: 08/11/2011
  • Est. Priority Date: 02/27/2009
  • Status: Abandoned Application
First Claim
Patent Images

1. A hydraulic apparatus with direct torque control comprising;

  • a cam body, the cat body being rotatable about an axis and having at least two mirror image involute cam surfaces on opposing sides of the axis;

    at least two hydraulic actuators on opposing sides of the axis, each of the actuators having a linearly extendable ram and a hydraulic cylinder, the ram comprising a piston positioned in the hydraulic cylinder and each ram being extendable to contact the involute cam surface on the respective opposing side of the axis;

    a fluid supply line for delivering a pressurized fluid to each of the cylinders;

    an open fluid connection between the hydraulic cylinders;

    a pressure relief or flow control valve associated with each of the hydraulic cylinders, the pressure relief or flow control valves being operable to selectively assume a closed position to retain fluid in the hydraulic cylinders or assume an open position to release fluid from the hydraulic cylinders; and

    a control for operating the pressure relief or flow control valves between at least the closed and open positions, to extend and retract the rams out of and in to the cylinders to rotate the cam body about the axis with controlled torque.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×