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| Number | Title | Issue Date |
| 7237706 | Drop hammer Embodiments of the present invention pertain to a drop hammer comprising a load, an actuator connected to the load, and a fluid circuit that is connected to the actuator and is connectable to a fluid source, such as a source of hydraulic power. The fluid circuit is ... | 07/03/2007 |
| 7201233 | Arm for moving flexible lines at a well site A movable arm 10 engages a flexible line 50 at a well site for positioning the flexible line between run-in position for passing the flexible line with a tubular through a well hole in the rig floor and a clamping position wherein the flexible line is ... | 04/10/2007 |
| 5778987 | Guided drilling system with shock absorber There is provided a guided drilling system and an in-the-hole shock absorber adapted thereto. The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the... | 07/14/1998 |
| 5330011 | Free fall stroker apparatus and method A free fall stroker for raising and dropping a drop hammer for soils bearing testing or the like includes a housing through which a drop hammer cable extends from one side to the bottom thereof. A pair of guide pulleys guide the cable through the housing ... | 07/19/1994 |
| 5257879 | Device for lifting and hammering foundation piles for offshore structures A device for lifting and hammering the foundation piles of offshore structures, consisting of a long support element having a length of the order of twenty meters, to be inserted into the foundation pile which is to be driven into the sea bed, said elemen... | 11/02/1993 |
| 4989677 | Pile driving A pile 13 is driven into the ground 5 by a ram 8 driven by a hydraulic cylinder 37. The pile 13 is guided through a guide 2 having a detachable end portion 4 which is embedded in the ground. The guide 2 and cylinder 37 are vertically slideable on a rail 3... | 02/05/1991 |
| 4977965 | Automatic drop hammer system Disclosed is a device for automatically and continuously lifting and dropping a drop hammer. The device has hydraulic and mechanical components which lift and drop the hammer and electromechanical components which sequence various actions and ensure that ... | 12/18/1990 |
| 4844661 | Method and device for driving tools into the ground This invention relates to a method and device for driving tools into the ground, comprising a chassis in which is slidably mounted an anvil connected by a set of rods to said tool and a hammer sliding in said chassis to strike the anvil, which device furt... | 07/04/1989 |
| 4727941 | Power operated reciprocating hand tool A reciprocating hand tool arranged to be operated by a rotating power source consisting of a rotatable eccentric, a flexible sleeve, a cable within the sleeve reciprocated by the rotation of the eccentric and a device for attaching a cutting tool to the e... | 03/01/1988 |
| 4667746 | Mobile apparatus for driving different objects into the ground by impact A mobile apparatus for driving different objects into the ground by impact, comprising a carrier structure supporting a swinging element along which slides a mass whose movements are controlled by a cable. The swinging element has a tubular structure divi... | 05/26/1987 |
| 4603747 | Apparatus for removing internal tiles from chimneys Apparatus is provided for removing the interior tile lining from brick chimneys. The apparatus includes an assembly that is lowered into the chimney, the assembly comprising a reversible electric motor mounted within a frame, and a weighted impact member ... | 08/05/1986 |
| 4602688 | Device for performing remotely-manipulated maintenance work in a shielded cell The invention is directed to a device for performing remotely-manipulated intenance work with a motor-driven tool such as an impact wrench or the like on conduits and process components arranged in a shielded, radioactively-ladened cell. The device includ... | 07/29/1986 |
| 4157737 | Mechanic device for the automatic control, at two speeds, of winches of pile-drivers A mechanic device that can be applied to pile-drivers, as to render automatic the control of the winch to lift the probe-weight of said machines, and allowing, at the same time, to perform the work at two different percussion speeds.... | 06/12/1979 |
| 4150727 | Downcrowding device for earth boring machines A device for applying an additional downward force to the rotating cutting tool of an earth boring machine. The machine has a mast and a rotating drive member suspended by the mast for vertical movement and for rotating the cutting tool. A rotatable drum ... | 04/24/1979 |
