Earth drilling device
AssigneeIng. Gunter Klemm Spezialunternehmen fur Bohrtechnik
InventorGunter Klemm
Life of this patent
Estimating the term…
Abstract
To rotate a pipe (17) to be urged into the ground, a rotary disk (20) clamped at said pipe (17) is pivotable on a table (19) which carries two groups of driving cylinders (40, 41). While the first group is operative to carry out the working stroke in order to turn the rotary disk (20) the return stroke is performed by the second group thus ensuring a continuous rotation of the rotary disk (20) or a standstill in one sense of rotation.
Claims10
An earth drilling device for rotating a pipe (17) into the ground comprising a rotary disk (20) having clamping means (28, 35) for engaging the pipe, a reciprocatingly driven first driving cylinder (40) for rotating said clamping means (28, 35), a stationary table (19) supporting said rotary disk (20), said rotary disk (20) having a plurality of peripherally distributed engaging members (45) capable of being advanced by said first driving cylinder (40), means for selectively operating said first driving cylinder (40) to advance said engaging members (45) in a first direction of rotation during a working stroke and moving away from said engaging members during a return stroke, swivel means (49, 53) for swiveling the first driving cylinder (40) toward the axis of the rotary disk (20) to effect selective engagement thereof with said engaging members (45), said rotary disk (20) having an inclined face (27), said clamping means (28, 35) including a plurality of clamping jaws (28) which are pressed axially against said inclined face (27) by a pressure member (35), and tension means (34) for urging said clamping means (28) and rotary disk (20) into clamping engagement through said inclined face (27).
An earth drilling device for rotating a pipe (17) into the ground comprising a rotary disk (20) having clamping means (28, 35) for engaging the pipe, a reciprocatingly driven first driving cylinder (40) for rotating said clamping means (28, 35, a stationary table (19) for supporting said rotary disk (20), said rotary disk (20) having a plurality of peripherally distributed engaging members (45) capable of being advanced by said first driving cylinder (40), means for selectively operating said first driving cylinder (40) to advance said engaging members (45) in a first direction of rotation during a working stroke and moving away from said engaging members during a return stroke, swivel means (49, 53) for swiveling the first driving cylinder (40) toward the axis of the rotary disk (20) to effect selective engagement thereof with said engaging members (45), and said rotary disk (20) includes other engaging members (46) operated by said first driving cylinder (40) to advance said other engaging members (46) in a second direction of rotation opposite to said first direction of rotation.
Dependencies are inferred from the claim text.