Pilot head for laying pipes in the ground
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsHiroshi Takada, Yasuo Kawada
Life of this patent
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Abstract
There is disclosed a pilot head used for laying small-diameter pipes such as gas, water conduits or the like precisely in position in the ground. The pilot head comprises an expandable and contractable pilot jack disposed within a pilot casing, a pivoting cylinder adapted for pivoting said pilot jack in any selected direction in a plane normal to the central axis of the pilot head, and an electromagnetic valve for operating said cylinder. The pilot head further includes a target and a clinometer both for detecting the position and posture thereof.
Claims9
A pilot head for laying pipes in the ground comprising:
- a pilot head casing;
- an expandable and contractable pilot jack disposed within said casing;
- a pilot jack head secured to a front end of said pilot jack for consolidating soil;
- sealing means for preventing water or soil from entering said casing, said sealing means being provided between a front end of said casing and said pilot jack;
- pivoting means for pivoting said pilot jack in any selected direction in a plane normal to the central axis of said pilot head, said pivoting means including a first pivoting cylinder, and a second pivoting cylinder circumferentially spaced in phase from said first cylinder by 90.degree. said first and second cylinders being positioned at a rear portion of said casing, and;
- electromagnetic valve means for remotely controlling said pivoting means, said electromagnetic valve means being disposed in the rear portion of said casing.
Dependencies are inferred from the claim text.