摘要:
A two part drill bit assembly and to the two drill bits that form the assembly. The drill bits are releasably engageable, to form the assembly, via compatible spiral grooved surfaces on each bit with one of the drill bits being re-useable and the other intended for single use or being made otherwise disposable.
摘要:
A tool (1) for making a hole in a granular soil, in particular a sandy soil, comprising an elongated central portion (10) having a longitudinal axis (15) and provided with a first end portion (11) configured in such a way to removably engage with a chuck (110) of a portable screw gun, or drill gun (100), and a second end portion (12) provided with an actuation head (20). This has a predetermined diameter and configured in such a way to make a hole (70) having a corresponding diameter in a determined granular soil when an electric motor (105) of the portable screw gun, or drill gun (100) is actuated for causing the rotation of the chuck (110) and of the tool (1) to it engaged about the rotation axis (15) [Fig. 1].
摘要:
Die Erfindung betrifft eine Bohrvorrichtung und ein Verfahren zum Herstellen eines Bohrpfahls im Boden mit einer Bohrschnecke (22), welche drehend antreibbar ist und mindestens eine Bohrwendel (24) aufweist, welche entlang einem zentralen Seelenrohr (26) verläuft, einem Bohrrohr (30), welches unabhängig von der Bohrschnecke drehend antreibbar ist und die Bohrschnecke zumindest abschnittsweise umgibt, und einem Drehboden (40), welcher drehbar an einem unteren Bereich der Bohrschnecke angeordnet ist und zwischen einer Bohrposition, bei welcher ein Durchgang (29) für Bodenmaterial zur Bohrwendel geöffnet ist, und einer Verschlussposition verstellbar ist, in welcher der Durchgang verschlossen ist. Gemäß der Erfindung ist vorgesehen, dass die Bohrschnecke und das Bohrrohr axial zueinander zwischen einer ersten Hubposition und einer zweiten Hubposition verstellbar sind, dass in der ersten Hubposition sich der Drehboden in der Bohrposition mit geöffnetem Durchgang befindet und dass in der zweiten Hubposition der Drehboden in seiner Verschlussposition mit geschlossenem Durchgang angeordnet ist.
摘要:
Devices for cutting holes in the ground typically have to be raised regularly to clear the debris from the hole. This is effected by a line attached to a bracket on the cutting assembly. However, the line can get wound around the rotating drive shaft which can be dangerous and prevent lifting of the assembly. Accordingly, a hole cutting device (10) is provided comprising: a first sleeve (25) for rotation by a drive member (20), the drive member (20) including a pilot hole cutting means (40) for creating a pilot hole having a first diameter; at least one first cutting member (160) linked to the first sleeve (25) for rotation thereof for cutting a hole having a second diameter larger than the first diameter; a bracket (140) for raising and lowering of the device (10) relative to the drive member (20); and anti-rotation means (90, 100) for maintaining the bracket (140) substantially rotationally stationary relative to the pilot hole; wherein the anti-rotation means comprises at least one ground engaging member (50) for engaging with a side (50) of the pilot hole.
摘要:
A drill bit for core sampling includes a body having a central axis and first end having a tapered outer surface and a radius transverse to the central axis, and an insert having a cutting surface on the first end oriented at an axial angle relative to the radius to move material displaced during drilling away from the first end.
摘要:
A helical drag bit provided with flights (20) of spirally/helically positioned cutting arms (10). The arms create a spiral trench geometry in the sidewall of the a predrilled pilot hole. The cutting arms terminate in scoring cutting blades.
摘要:
A multifunctional screw drill and reaming device, for the testing of the structure and composition of various soil types, as well as for sampling and boring, extracting and injecting of gases and various types of chemicals as well as liquids, slurry, granules and solids. Screws can be hydraulically, pneumatically, mechanically, electrically or manually driven. Dependent upon the operation, the secondary screws (2) can rotate and change position or rotational direction within the primary screw's bore (1), or both primary (1) and secondary screws (2) can be coupled and rotate as one unit.