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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 |
| 7198117 | Method and arrangement for controlling percussion rock drilling The invention relates to a rock drilling arrangement and a method and program for controlling rock drilling on the basis of specific energy consumption. The specific energy of drilling is the quantity of energy used per a unit of length of the drilled hole. Not only... | 04/03/2007 |
| 7150115 | All earth foundation trencher An all-earth foundation trencher has a digger body (1) pivotal selectively on a track-laying chassis (7). The digger body has an earth-mover blade (16) that is manipulatable multi-directionally on a front end. A digger boom (19) has a bas... | 12/19/2006 |
| 7073989 | Re-configurable bushing and drill incorporating same A bushing and associated drill are provided that may be actuated either pneumatically or with a spring in order to be biased into contact with a structure, such as a multi-layer structure, to reduce gaps therewithin. The bushing includes a housing and a nose piece s... | 07/11/2006 |
| 7063159 | Multi-purpose coiled tubing handling system A system for reducing the effects of heave movements of a wellhead in an offshore drilling device is provided that includes a frame; a coiled tubing stack supported by the frame; and a heave compensation system for controlling an amount of load transferred from the ... | 06/20/2006 |
| RE38834 | Safety trip assembly and trip lock mechanism for a fastener driving tool A fastener driving tool includes a housing assembly with a nosepiece assembly defining a drive track. A driving mechanism is housed within the housing assembly to drive a fastener through the drive track and into a workpiece in response to a trigger. The tool includ... | 10/18/2005 |
| 6938702 | Method and equipment for controlling operation of rock drilling apparatus A method and an equipment for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device for producing impact energy to a tool of the rock drilling apparatus, a rotating device for rotating the tool in a drill... | 09/06/2005 |
| 6883620 | Device for hydraulic power supply of a rotary apparatus for percussive drilling A device for supplying hydraulic power to a rotary apparatus for percussive drilling (2) whereof the tool (3) is driven in one direction or another and subjected to the action of an impact device (6) acting independently of the rotation, of a hy... | 04/26/2005 |
| 6834731 | Staple gun apparatus for attaching tab The invention comprises a staple gun with highly compact accessory apparatus for attaching a planar tab or label to a fixing surface. The accessory has a housing and a positioning and indexing assembly associated with the housing which is operable to feed and hold a... | 12/28/2004 |
| 6119793 | Rock drill The rock drill (9) includes a reversible rotary motor (10) and a percussion unit (11) with a percussion valve (17). Rotary unit and Percussion unit (11) are operated via separate valves (39, 46) in a control unit (34). The percussion frequency of the perc... | 09/19/2000 |
| 5778990 | Arrangement in a hydraulically operated rock drilling equipment Arrangement in a hydraulically operated rock drilling equipment comprising a feed motor (3), a percussion device (2), and a hydraulic pump (1) for feeding hydraulic fluid to the feed motor (3) and the percussion device (2). The arrangement comprises a pre... | 07/14/1998 |
| 5771981 | Control system for percussion drill A control system for a percussion drill with a hydraulically actuated drill rotation mechanism and drill feed mechanism which includes a control means which operates, in response to the hydraulic pressure in the drill feed mechanism, to start percussion m... | 06/30/1998 |
| 5715724 | Adaptive, self-regulating forging hammer control system In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by the number of valves employed and the timing of the opening... | 02/10/1998 |
| 5564455 | Hydraulic circuit for automatic control of a horizontal boring machine A hydraulic circuit (10) is disclosed for use in controlling a horizontal boring machine which requires hydraulic fluid under pressure for rotating a drill bit or backreamer through a rotation circuit and hydraulic fluid under pressure for thrusting the d... | 10/15/1996 |
| 5121802 | Method and arrangement for controlling a rock drilling apparatus The invention relates to a method and an arrangement for adjusting the percussion and the feed of a rock drilling apparatus with respect to each other. In the method, the volume flow of pressure fluid to be supplied to a percussion device (7) and a feed m... | 06/16/1992 |
| 4898219 | Working head for a tree-shaping machine A working head for a tree-shaping machine comprises drive means and at least one shaping unit comprising at least one mobile blade and an actuating jack (8, 9) for applying the blade to the surface of a tree. The pressure in the jacks is cancelled during ... | 02/06/1990 |
| 4712405 | Method of self-regulation of output energy of forging hammers using input sensed peak of lifting fluid pressure for correction A forging hammer employs compressible fluid to drive the ram into impact and a trapped volume of compressible fluid to cause the ram to be retracted from impact position when fluid driving the ram into impact is released. The velocity of impact is adjuste... | 12/15/1987 |
| 4712404 | Method of self-regulating consistency of applied energy in a forging hammer employing input differential A forging hammer employs compressible fluid to drive the ram into impact and a trapped volume of compressible fluid to cause the ram to be retracted from impact position when fluid driving the ram into impact is released. The velocity of impact is adjuste... | 12/15/1987 |
| 4712415 | Method of determining stroke length of a pneumatic forging hammer using sensed peak pressure A forging hammer employs compressible fluid to drive the ram into impact and a trapped volume of compressible fluid to cause the ram to be retracted from impact position when fluid driving the ram into impact is released. The velocity of impact is adjuste... | 12/15/1987 |
| 4711090 | Method of and device for adjusting the feed movement of a drill rod for drilling a rock In a method of and device for adjusting the feed movement of a drill rod for drilling a rock, the drill rod is rotated by a pressure-medium-operated rotary motor and fed in a drilling direction and in the opposite direction by a pressure-medium-operated f... | 12/08/1987 |
| 4660656 | Method and apparatus for controlling the rotational torque of a drill bit A method and apparatus for controlling the rotational torque of a drill bit powered by a downhole motor. The downhole motor is suspended from a hydraulic ram at the lower end of a string of drill pipe. A torque sensor detects the reactive torque in the do... | 04/28/1987 |
| 4542940 | Method and apparatus for cutting a trench through rock-like material Apparatus and method for digging deep trenches having parallel generally vertical walls in solid rock such as limestone. The apparatus includes a transport means for providing support and for moving along a traverse on the earth's surface while cutting a ... | 09/24/1985 |
| 4440236 | Hydraulic control system for a rock drill A rock drill having a hydraulic system for controlling striking, rotating and advancing movements of a drilling rod. The advancing or forward feeding conduit for a feed actuator is provided with a relief valve which is responsive to the pressure in the po... | 04/03/1984 |
| 4369848 | Control system for a rock drill A hydraulic control system for use with a rock drill is adapted to sense a pressure build-up in the drill's rotation motor and in response thereto, to reverse the direction of feed of the feed motor as well as to supply hydraulic fluid to a shank cylinder... | 01/25/1983 |
| 4356871 | Hydraulic control system for a rock drill A rock drill having a hydraulic system for controlling a striking, rotating and advancing movements of a drilling rod. The advancing or forward feeding conduit for a feed actuator is provided with a relief valve which is responsive to the pressure in the ... | 11/02/1982 |
| 4343513 | Method and power transmission system for operating a road planar machine The method and power transmission system of this invention for driving a road planar machine has the cutter unit in a positive mechanical drive with the drive shaft of a machine power unit through a hydraulically actuated clutch mechanism. The wheel tract... | 08/10/1982 |
| 4318334 | Torque control for a fluid operated motor A torque control for a fluid operated motor includes a first gear to be driven through operation of the motor and a second gear in driving engagement with said motor and maintained in a generally stationary position during normal operation thereof. The to... | 03/09/1982 |
| 4280569 | Fluid flow restrictor valve for a drill hole coring tool An apparatus operable on a wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises a hydraulically operated backup shoe for wedging the apparatus at a selected location in the drill hole, a hydraulic motor with a drillin... | 07/28/1981 |
| 4271914 | Automatic feed and rotational speed control system of a hydraulic motor operated drill A needle valve placed in series with the hydraulic drill feed motor, and responsive to fluid flow in the hydrualic system subject to the operation of a pressure relief valve therein, causes the thrust to increase and the feed rate to decrease as the drill... | 06/09/1981 |
| 4266171 | Advance control system for use in a drilling apparatus A drilling apparatus includes a drilling rod, a feed motor for advancing and retreating the rod in relation to an object to be drilled, and a control system for controlling the movement of the rod. The control system includes a pulse generator for produci... | 05/05/1981 |
| 4246973 | Controls for hydraulic percussion drill A control system for a hydraulic percussion rock drill and feed mechanism including a single constant power hydraulic pump for supplying pressure fluid to operate the feed mechanism, drill stem rotation motor, and the percussion hammer. The drill feed, ro... | 01/27/1981 |
| 4165789 | Drilling optimization searching and control apparatus An apparatus employed in the searching of the optimized rate of penetration of a drill into a given medium based upon the two drilling parameters of thrust and speed of revolution. Preset base values of both parameters are input into the drilling control ... | 08/28/1979 |
| 4069928 | Machine for clearing bulk material This disclosure relates to a machine for clearing bulk material from a bin table by moving therealong a movable support carrying a pivotally mounted rotatable clearing wheel including a first drive mechanism for moving the movable support and a second dri... | 01/24/1978 |
| 4064950 | Hydraulic drilling machine A hydraulic drilling machine for cutting into rock formations and the like. The machine has a rotating drill rod with a bit at one end and a rotary hydraulic drive motor at the other end. The drill rod is supported on a carriage adapted for linear travel ... | 12/27/1977 |
| 4023626 | Self-adaptive hydraulic rock drill A hydraulic drill, more particularly a rock drill, having a self-adaptive servo control system comprising three separate but interdependent hydraulic circuits, one for operating and controlling the drill rotation motor, one for controlling and operating t... | 05/17/1977 |
| 3979944 | Hydraulic drill, in particular a rock drill A hydraulic rock drill having a hydraulic drill drive motor, a hydraulic feed motor, and a hydraulic impact unit and associated pumps for supplying hydraulic fluid under pressure and provided with an automatic control system including a valve controlling ... | 09/14/1976 |
| 3945138 | Hydraulically controlled and driven bucket wheel dredge A hydraulically controlled and driven dredge, in which the pumps for delivering the driving fluid for the bucket wheel drive are equipped with output controls for controlling the fluid delivery in conformity with the encountered digging resistance and tha... | 03/23/1976 |
