Drill for a railroad rail having a four position and six way hydraulic control valve
AssigneeFramatome Connectors USA Inc.
InventorsJohn D. Lefavour, Armand T. Montminy
Life of this patent
Estimating the term…
Abstract
A hydraulically powered tool having a motor, a pump, and a hydraulic directional flow control valve. The valve has a frame and a rotatable spool with flow channels. The valve is provided as a four position, six way valve to provide four operational conditions for the tool including NEUTRAL, DRILL, RETRACT and FAST FORWARD.
Claims17
In a hydraulic tool having a hydraulically driven motor, a hydraulic pump, and a hydraulic directional flow control valve connected between the motor and the pump, wherein the improvement comprises:
- the valve being a frame with at least six flow conduits and a flow directing member movably mounted to the frame, wherein the flow directing member is movable on the frame among at least four different flow positions to selectively interconnect the six flow conduits to provide at least four different operating conditions for the tool.
A hydraulic flow control valve comprising:
- a manifold having hydraulic flow conduits connecting hydraulic flow inlets and outlets to six directional flow holes of the manifold;
- and
- a flow directing member movably mounted to the manifold among four positions, the flow directing member comprising means for selectively directing flow among the six holes in the manifold, wherein the valve is a four position and six way valve.
In a hydraulic railroad rail drilling tool having a frame, a hydraulically driven motor, a drill bit connected to the motor, and a hydraulic directional flow control valve connected to the motor and connectable to a hydraulic pump, wherein the improvement comprises:
- the hydraulic directional flow control valve having a movable flow directing member with at least five separate channels, wherein the valve is adapted to provide at least four different operating conditions for the drill bit comprising neutral, drill, retract and forward fast movement of the drill bit.
Dependencies are inferred from the claim text.