Hydraulic earth boring machine

A hydraulic earth boring machine for forming passageways through an earth formation beneath an established surface such as a roadway, walkway or the like, said earth boring machine comprising:

• hydraulic cylinder means having a first end plate and a second end plate and a hydraulic fluid conduit operably tapped into each end of said hydraulic cylinder means;
• drive cylinder means coaxially mounted within said hydraulic cylinder means and slidingly received through at least one of said end plates,
• said drive cylinder means having a central coaxial passage from end to end thereof for operably receiving a boring shaft extending coaxially through said hydraulic cylinder means;
• an annular piston head mounted upon said drive cylinder means and slidingly received within the interior of said hydraulic cylinder means for axially translating said drive cylinder means relative to said hydraulic cylinder means upon pumping of hydraulic fluid into said hydraulic cylinder means;
• a cylindrical carrying sleeve coaxially mounted upon the first end plate of said hydraulic cylinder means and extending through said hydraulic cylinder means to a position adjacent the second end plate,
• said carrying sleeve being operable to directly surround and receive the boring shaft through said hydraulic cylinder means, and
• said carrying sleeve coaxially carrying said drive cylinder upon the exterior surface thereof such that said drive cylinder may operably telescope relative to said carrying sleeve and said hydraulic cylinder means through the second end plate of said hydraulic cylinder means;
• means for elevating and vertically aiming said hydraulic cylinder means, in situ, within an earth trench;
• means for axially bracing and horizontally angling said hydraulic cylinder, in situ, within the earth trench and
• means connected to said drive cylinder means for selectively gripping a boring shaft to releasably couple said drive cylinder means to the boring shaft, said means for selectively gripping comprising,
• an upper arm connected to an upper portion of said drive cylinder and extending generally longitudinally away from said one end of said drive cylinder means and parallel with an intended line of travel of the boring shaft,
• a lower arm connected to a lower portion of said drive cylinder means and extending generally longitudinally away from said drive cylinder means and parallel with said upper arm and the intended line of travel of the boring shaft,
• a first locking plate, having an aperture there through for receiving the boring shaft, and being pivotally mounted upon and downwardly depending from said upper arm, and
• a second locking plate, having an aperture there through for receiving the boring shaft, and being pivotally mounted upon and upwardly extending from said lower arm, wherein the axes of the apertures of said first and second locking plates are coaxial when said first and second locking plates are vertical in orientation,
• said lower arm being longer than said upper arm and said first locking plate being longitudinally offset toward said hydraulic cylinder means with respect to said second locking plate, and
• link means pivotally connected, at one end thereof, to said first locking plate and pivotally connected, at the other end thereof, to said second locking plate wherein said first and second locking plates will pivot in unison, but in an opposite angular direction, about the upper and lower arm respectively;
• wherein generally horizontal earth boring may be achieved beneath an established surface by placing the boring machine within an earth trench generally adjacent and normal to an established surface, elevating and bracing said hydraulic cylinder means within the earth trench, tilting said locking means to couple said drive shaft to the boring shaft and actuating said annular piston and drive shaft to push the boring shaft generally horizontally through the earth formation beneath the established surface.

A hydraulic earth boring machine for forming passageways through an earth formation beneath an established surface such as a roadway, walkway or the like, said earth boring machine comprising:

• hydraulic cylinder means having end plates and a hydraulic fluid conduit operably tapped into each end of said hydraulic cylinder means;
• drive cylinder means coaxially mounted within said hydraulic cylinder means and slidingly received through at least one of said end plates,
• said drive cylinder means having a central coaxial passage from end to end thereof for operably receiving a boring shaft extending coaxially through said hydraulic cylinder means;
• an annular piston head mounted upon said drive cylinder means and slidingly received within the interior of said hydraulic cylinder means for axially translating said drive cylinder means relative to said hydraulic cylinder means upon pumping of hydraulic fluid into said hydraulic cylinder means;
• means for elevating and vertically aiming said hydraulic cylinder means, in situ, within an earth trench, said means for elevating and vertically aiming including,
• base means for contacting the bed of the earth trench and being pivotally connected at one end to said hydraulic cylinder means;
• and
• bell crank means having a long arm and a short arm, said bell crank means being pivotally connected to said base means, wherein the short arm lies beneath said hydraulic cylinder means and actuation of said long arm will pivot said short arm about said base means and elevate said hydraulic cylinder within the earth trench;
• means for axially bracing and horizontally angling said hydraulic cylinder, in situ, within the earth trench, said means for axially bracing and horizontally angling including,
• generally rectangular head rail means connected to an end of said hydraulic cylinder means in a posture generally perpendicular to a central longitudinal axis of said hydraulic cylinder means and being operable to be placed in another earth trench fashioned perpendicular across the earth trench for generally axially receiving said hydraulic cylinder means wherein axial forces generated by said hydraulic cylinder means during an earth boring operation will be reacted through said head rail means;
• means connected to said drive cylinder means for selectively gripping a boring shaft to releasably couple said drive cylinder means to the boring shaft, said means for selectively gripping comprising,
• arm means connected at one end to said drive cylinder means and extending generally longitudinally along the path of the boring shaft, and locking means pivotally mounted generally at the other end of said arm means and having an aperture therethrough with internal dimensions greater than the external dimensions of the boring shaft for coaxially receiving the boring shaft, said locking means including
• a locking plate, having an aperture therethrough for receiving the boring shaft, and being pivotally mounted upon said arm means and extending in the path of the boring shaft such that said aperture is normally coaxially aligned with the boring shaft, and
• control arm means operably connected to said locking plate to provide for manual actuation of said locking plate to incline said locking plate for gripping the boring shaft with peripheral upper and lower segments of the aperture through said locking plate and to facilitate continuous gripping action of said locking plate about the boring shaft;
• wherein generally horizontal earth boring may be achieved beneath an established surface by placing the boring machine within an earth trench generally adjacent and normal to the general direction of the established surface, elevating and bracing said hydraulic cylinder means within the earth trench, tilting said locking means to couple said drive shaft to the boring shaft and actuating said annular piston and drive shaft to push the boring shaft generally horizontally through the earth formation beneath the established surface.

A hydraulic earth boring machine for forming passageways through an earth formation beneath an established surface such as a roadway, walkway or the like, said earth boring machine comprising:

• hydraulic cylinder means having end plates and a hydraulic fluid conduit operably tapped into each end of said hydraulic cylinder means;
• drive cylinder means coaxially mounted within said hydraulic cylinder means and slidingly received through at least one of said end plates,
• said drive cylinder means having a central coaxial passage from end to end thereof for operably receiving a boring shaft extending coaxially through said hydraulic cylinder means;
• an annular piston head mounted upon said drive cylinder means and slidingly received within the interior of said hydraulic cylinder means for axially translating said drive cylinder means relative to said hydraulic cylinder means upon pumping of hydraulic fluid into said hydraulic cylinder means;
• means for elevating and vertically aiming said hydraulic cylinder means, in situ, within an earth trench, said means for elevating and vertically aiming including,
• base means for contacting the bed of the earth trench and being pivotally connected at one end to said hydraulic cylinder means;
• and
• bell crank means having a long arm and a short arm, said bell crank means being pivotally connected to said base means, wherein the short arm lies beneath said hydraulic cylinder means and actuation of said long arm will pivot said short arm about said base means and elevate said hyraulic cylinder within the earth trench;
• means for axially bracing and horizontally angling said hydraulic cylinder, in situ, within the earth trench, said means for axially bracing and horizontally angling comprising,
• first gate means for engaging one lateral side wall of the earth trench,
• first arm means pivotally connected at the ends thereof between a forward end of said first gate means and a forward portion of said hydraulic cylinder means;
• second arm means pivotally connected at the ends thereof between a trailing end of said first gate means and a trailing end portion of said hydraulic cylinder means;
• first hydraulic means operably connected between said first gate and said hydraulic cylinder means for pivoting said first gate means toward and away from said hydraulic cylinder means such that said first gate means operably engages with the one lateral side wall of the earth trench,
• second gate means for engaging the other lateral side wall of the earth trench,
• first arm means pivotally connected at the ends thereof between a forward end of said second gate means and a forward portion of said hydraulic cylinder means,
• second arm means pivotally connected at the ends thereof between a trailing end of said second gate means and a trailing end portion of said hydraulic cylinder means,
• second hydraulic means operably connected between said first gate means and said hydraulic cylinder means for pivoting said second gate means toward and away from said hydraulic cylinder means such that said second gate means operably engages with the other lateral side wall of the earth trench,
• one side of said hydraulic cylinder means, said first gate means and said first and second arm means connecting said first gate to said hydraulic cylinder form a first rearwardly inclined parallelogram linkage system, and
• the other side of said hydraulic cylinder means, said second gate means and first and second arm means connecting said second gate to said hydraulic cylinder means form a second rearwardly inclined parallelogram linkage system on the other side of said hydraulic cylinder means, wherein lateral positioning and horizontal angling of said hydraulic cylinder within said trench may be facilely achieved;
• means connected to said drive cylinder means for selectively gripping a boring shaft to releasably couple said drive cylinder means to the boring shaft, said means for selectively gripping comprising,
• arm means connected at one end to said drive cylinder means and extending generally longitudinally along the path of the boring shaft, and
• locking means pivotally mounted generally at the other end of said arm means and having an aperture therethrough with internal dimensions greater than the external dimensions of the boring shaft for coaxially receiving the boring shaft, said locking means including
• a locking plate, having an aperture therethrough for receiving the boring shaft, and being pivotally mounted upon said arm means and extending in the path of the boring shaft such that said aperture is normally coaxially aligned with the boring shaft, and
• control arm means operably connected to said locking plate to provide for manual actuation of said locking plate to incline said locking plate for gripping the boring shaft with peripheral upper and lower segments of the aperture through said locking plate and to facilitate continuous gripping action of said locking plate about the boring shaft;
• wherein generally horizontal earth boring may be achieved beneath an established surface by placing the boring machine within an earth trench generally adjacent and normal to the general direction of the established surface, elevating and bracing said hydraulic cylinder means within the earth trench, tilting said locking means to couple said drive shaft to the boring shaft and actuating said annular piston and drive shaft to push the boring shaft generally horizontally through the earth formation beneath the established surface.