Drill for a railroad rail having a four position and six way hyd

Details Drill for a railroad rail having a four position and six way hyd Drill for a railroad rail having a four position and six way hyd

1998-05-04

1999-07-20

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Means to drive tool

Including means to move tool along tool-axis

91436, 13762521, B23B 4504

Patent

active

059248289

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.

REFERENCES:
patent: 2108182 (1938-02-01), Searle
patent: 2692660 (1954-10-01), Good et al.
patent: 2932192 (1960-04-01), Hansen
patent: 3145588 (1964-08-01), King
patent: 3556151 (1971-01-01), Masuda
patent: 3796232 (1974-03-01), Dalton
patent: 5295770 (1994-03-01), Pennison et al.
"Hydraulic Railway Maintenance of Way Tool Guide", Stanley Hydraulic Tools, 28 pages, Jul. 1995.
Enerpac Catalog, 3-Way Directional Control Valves and 4-Way Directional Control Valves, pp. 116-119.
Power Team Catalog, Valves For Double-Acting Cylinders, Manually Operated, p. 77.

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