Earth boring rotary tool with axial feed

Details Earth boring rotary tool with axial feed Earth boring rotary tool with axial feed

1994-08-22

1996-05-21

Melius, Terry Lee

Excavating

Rotary digger

173150, 175 57, E21B 700

Patent

active

055177743

ABSTRACT:
A hydraulic motor is mounted on top of a hydraulic cylinder barrel. The barrel houses a drive shaft that is rotated by the motor. A male hex drive shaft, attached to the drive shaft, extends downward through the barrel. A piston is mounted within the barrel and moves linearly along the male hex drive shaft. Attached to the piston is a piston rod having an upper portion, a center portion, and a lower portion. The center portion defines a rod chamber for accommodating the male hex drive shaft as the piston and the piston rod move upward. The upper portion has a hexagonal inner surface for rotation and sliding movement along the male hex drive shaft. A passage through the center portion allows fluid to flow between the rod chamber and the upper chamber of the cylinder barrel.

REFERENCES:
patent: 2598203 (1952-05-01), Acker, Jr.
patent: 2856155 (1958-10-01), Putt
patent: 3519088 (1970-07-01), Bayless
patent: 3768578 (1973-10-01), Russell, Jr.

Affiliated with

Also associated with

Rating

Earth boring rotary tool with axial feed does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Earth boring rotary tool with axial feed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth boring rotary tool with axial feed will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2029968