Abstract:
Disclosed is a hammering device (1) comprising a hammer (2), an elongated linear carriage guide (3) including a first guide end (4) and a second guide end (5) at eithers ends of the elongated linear carriage guide (3) and a hammer carriage (6) arranged to be displaceable back and forth along the elongated linear carriage guide (3). The hammering device (1) further comprises a lifting line (7) connected to the hammer carriage (6) and to the hammer (2), so that the hammer (2) is displaced in response to displacement of the hammer carriage (6), wherein the lifting line (7) is extending from the hammer carriage (6) in a direction towards the first guide end (4). The hammering device (1) also comprises a displacement carriage (8) arranged to be displaceable back and forth along the elongated linear carriage guide (3), and displacement means (9) connected to the displacement carriage (8) and arranged to displace the displacement carriage (8), wherein the displacement carriage (8) is arranged between the hammer carriage (6) and the first guide end (4). Furthermore, a method for operating a hammering device (1) is disclosed.
Abstract:
The invention relates to a pile-driving device and a method for driving driving material into a ground, wherein, for the purpose of driving-in, the driving material is clamped and held by means of a clamping means on a pile-driving power unit and prior to clamping the driving material is connected by means of a flexible securing element, in particular a securing chain, to the pile-driving power unit. In accordance with the invention a pressing element is provided which is displaced relative to the pile-driving power unit towards the driving material and, in doing so, a pressing force is applied onto an upward-directed front face of the driving material.
Abstract:
A method of installing a plurality of pin piles into a seabed including at least the steps of: (a) lowering a pin pile apparatus comprising a first pin pile and an attached clump weight towards the seabed; (b) allowing the first pin pile to self-penetrate the seabed based on self-weight of the pin pile apparatus and the momentum from step (a) until the clump weight reaches the sea bed; (c) disconnecting the clump weight from the first pin pile; and (d) recovering the clump weight for use with a second pin pile and repeating steps (a)-(c). In this way, the pin piles are easily installed from their descent to the seabed with the clump weight, which can then be removed and applied to the next pin pile in an easy and repeatable operation without requiring a suction apparatus or hammer or drill.
Abstract:
Disclosed is a hammering device (1) comprising a hammer (2) connected to a winch (3) by means of cable means (4), wherein the rotation of the winch (3) is driven by one or more hydraulic motors (5), and wherein the hammering device (1) further comprises position detection means (6) for detecting a position of the hammer (2). Furthermore, a method for operating a hammering device (1) is disclosed.
Abstract:
The post driver with limited movement floating post anvil does not rely heavily upon the skill of the operator to efficiently drive posts. The post anvil is allowed to move up and down in relation to the driver, but its movement is limited by both lower and upper fixed barriers. Since the movement is limited, the operator can position the driver upon the post allowing the full weight of the driver framework/carrier machine to rest upon the post. The post would push the floating post anvil upward only to the point at which the upper fixed barrier prevents further upward movement of the floating post anvil. Thus, once the floating post anvil abuts the upper fixed barrier, substantially the entire weight of the post driver is resting on the post.
Abstract:
A post driver has a housing of tubular form extending substantially vertically, and weight telescopically mounted within the housing for movement between an extended position raised above the housing and a lowered position. A strike pad projects from the weight to drive a post into a hole drilled in the ground. A fluid cylinder mounted within the housing extends from a lower part of the housing to the interior of the weight and is operable to raise the weight to its extended position whereby the weight can then fall to a lower position at which its strike pad engages the upper end of the post.
Abstract:
The present invention relates to a method of securing a shaft at any point along its substantially vertical axis of movement, wherein the method includes a locking device that is moveable with respect to the shaft. The method is characterised by the step of moving the locking device into a position wherein at least one face of the locking device mates against at least one point on the shaft so as to secure the shaft at any point along its substantially vertical axis of movement. In particular this invention relates to a method of securing a drop hammer at any point along its substantially vertical axis by use of a hydraulically controlled cam.
Abstract:
An automatic drive hammer system, particularly adapted to use in the Standard Penetration Test, is mounted on a drill rig in such a way that it can be swung and translated to an on-hole working position. A hammer reciprocating mechanism is so mounted that its weight is not borne entirely by the drill rod, the hammer is dropped free through an accurately predetermined height onto an anvil isolated from the reciprocating mechanism so that all of the energy from the falling hammer is transmitted to the drill rod, and the hammer will not be lifted and released if the anvil is not in place.
Abstract:
A wheeled, self-propelled apparatus has a percussion tool or hammer mounted on its forward end and an impact transmitting means carried on the tractor below the hammer. The impact transmitting means is adapted to be mounted to transmit repeated impacts from the hammer to a cemetery marker until the latter is flush with the ground surface where it will not interfere with ground maintenance, such as lawnmowing and the like.
Abstract:
A vehicle-supported post-hole driver comprises a frame adapted to be mounted on the pivot of the vehicle drawbar. It is supported in a fore-and-aft position by a fluid cylinder connected between the frame and the support vehicle, the fluid cylinder providing for fore-and-aft movement of the outboard end of the frame. A second fluid cylinder pivots the frame about the drawbar pivot thereby transversely positioning the outboard end of the frame. The outboard end of the frame supports a pivotally-mounted yoke into which a pivotally-mounted vertical guide bearing is positioned. The combination of the pivoted yoke and the pivoted guide bearing provides a gimbaled arrangement. Slideably positioned in the guide bearing is a vertical shaft to which is attached a drive hammer and post-hole bit assembly. The drive hammer is raised relative to the post-hole bit by means of a fluid cylinder mounted within the bit and connected to the drive hammer. It drops gravitationally and drives the bit into the ground.