Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Tie rod tensioner
Patent
1979-08-20
1981-02-17
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Tie rod tensioner
E21B 1900
Patent
active
042510570
ABSTRACT:
A leveling structure incorporated in an underground pipe installer device comprised of a jack positioned relative to a first end portion of the pipe installer device to selectively raise or lower the first end a desired amount about a pivot, located adjacent to a second end of the device. A first, vertically movable portion of the jack is fixed relative to a main longitudinally extending main frame which carries drive jaws operated by a suitable fluid operated cylinder and piston assembly utilized to drive a rod through the ground to form a hole into which a pipe or the like is withdrawn into an installed position. A second portion of the jack is pivoted to a rear end portion of a base structure which is, in turn, pivotally attached at its forward end relative to a forward end portion of the main frame; and a vertically extending screw rod is threaded through a nut carried in the upper end of the first jack portion with a lower end portion, rotatably captivated to a top end of the second jack portion.
REFERENCES:
patent: 2656148 (1953-10-01), Fladung
patent: 3907253 (1975-09-01), Schosek
patent: 3916636 (1975-11-01), Wilhelm
patent: 4024721 (1977-05-01), Takada et al.
Watson Robert C.
Wilson Alfred E.
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