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| Number | Title | Issue Date |
| 8028761 | Electric power tool The invention is based on an electric power tool having at least one drive unit and a gear unit, where the gear unit is a drive element for applying force to a piston unit. It is proposed that the drive element and the piston unit be arranged in an axially parallel ... | 10/04/2011 |
| 7913771 | Battery operated cordless vibratory pile driver A cordless vibratory pile driver (“vibro”) may use one or more batteries to provide the requisite power. The cordless vibro may sit in a stand that also recharges the unit while it is in the stand when the device is not in use. The replaceable batteries are moun... | 03/29/2011 |
| 7870910 | Vibration generator for a vibration pile driver A vibration generator for a vibration pile driver has imbalance masses that can rotate and which are disposed on shafts. The rotational position of the imbalance masses can be adjusted relative to one another. A control and regulation circuit is provided which has a... | 01/18/2011 |
| 7866411 | Vibration dampened hand-held power tool A hand-held power tool, e.g. a high speed file or polisher has a single rotary drive shaft (8) to which there is locked a first eccentric member (1) in which a second eccentric member (2) can be rotated and locked forming a first assembly (10... | 01/11/2011 |
| 7740085 | Vibratory apparatus for a rotary-vibratory drill A vibratory apparatus comprises an eccentric mass disposed within a housing. A shaft and bushing are received by the eccentric mass and couple the eccentric mass to a crankshaft. An internal conduit extends longitudinally within the shaft. Input and output conduits ... | 06/22/2010 |
| 7568529 | Drill tool A drill tool is provided with: a drive source accommodated in a tool body 2; a bit drive shaft 3 which is rotation-driven by the drive source and provided projectingly from a front end of the drill body 2; and a diamond bit 4 attached to ... | 08/04/2009 |
| 7407343 | Hydraulic-forced resonance-free vibratory sheet piling driving and extraction machine An apparatus and method for continuously preloading during installation and removal of steel sheet piles, steel pilings, and casing piles, with a telescoping, articulated boom having a free end for creating the downward driving force, a weighted base to provide supp... | 08/05/2008 |
| 7392855 | Vibratory pile driving systems and methods A drive system for driving and/or extracting an elongate member. The drive system comprises a piston drive assembly, a hydraulic system, and a vibration drive assembly. The piston drive assembly comprises a piston member, and the piston member engages the elongate m... | 07/01/2008 |
| 7353715 | System, apparatus and method for testing under applied and reduced loads A system which cyclically applies and reduces a load on a test specimen and which can use an apparatus comprising: (a) a frame; (b) a load adjusting section having a fluidic mechanical muscle that contracts and extends in length to cyclically apply and reduce a load... | 04/08/2008 |
| 7320368 | Power impact tool The object of the invention is to ease of operation of the power impact tool. Such object is achieved by a representative power impact tool according to the invention including a motor, a tool bit, a trigger and a mode changing member. The trigger is manually operat... | 01/22/2008 |
| 7314098 | Apparatus for driving and extracting stakes A hand-held tool having a motor, a vibration mechanism, and a stake-gripping device is disclosed for driving and extracting stakes or posts. The vibration mechanism generally comprises a housing surrounding a pair of geared eccentric plates or geared weighted plates... | 01/01/2008 |
| 7306049 | Mode change switch for power tool A gear wheel is rotatably mounted on a drive shaft. The drive shaft has a plurality of longitudinal splines formed thereon. A drive sleeve surrounds the drive shaft and has a plurality of the inner splines formed on its interior surface. The inner splines slidably i... | 12/11/2007 |
| 7296949 | Removal of obsolete drill platforms from inland seas and ocean floors The present invention is a method for removing an obsolete drill platform that includes a body having a plurality of caissons embedded in a ground of an ocean or inland sea. The method includes the steps of vibrating at least one of the caissons, and lifting the at ... | 11/20/2007 |
| 7204321 | Concrete drill A concrete drill for drilling concrete or the like by a diamond bit (5) attached to a front end of a bit drive shaft (4) projected forward from a main body (1) by driving to rotate the bit drive shaft (4) by a drive source (2) cont... | 04/17/2007 |
| 7204320 | Active rotational balancing system for orbital sanders A system for active dynamic balancing of a rotating tool driven by a motor having a shaft supported by a first and second bearing on opposing sides of the motor includes an acceleration sensing assembly configured to sense radial accelerations on the shaft producing... | 04/17/2007 |
| 7191847 | Drive for a motor-driven hand-held tool A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating drive element (30) for a working tool, wit... | 03/20/2007 |
| 7192293 | Non-reversing short tape coil device The invention provides an apparatus including a housing and a spool disposed in the housing for rotation. The apparatus also includes a wire disposed in the housing and having a first end fixedly engaged with the housing and a second end fixedly engaged with the spo... | 03/20/2007 |
| 7185558 | Geared segments with variable gear ratio A variable gear ratio device featuring geared segments with variable gear ratio adapted for inclusion into mechanical machines, motors and pumps where there is a constant requirement for a variable transfer ratio for the variability and optimization of the load of t... | 03/06/2007 |
| 7174970 | Vibratory damped guide lever for a working device The invention concerns a hand-operated working device such as, for example, vibrating plates and vibrating rollers for soil compaction with a guide lever that is arranged on the working device such that it is vibratory damped, can be adjusted in its working height, ... | 02/13/2007 |
| 7168890 | Eccentric vibration system with resonance control The present invention may be embodied as an eccentric vibration system comprising a major eccentric member, a minor eccentric member, first and second motor assemblies, and a transmission system. The transmission system operates in a first mode when a torque of the ... | 01/30/2007 |
| 7134562 | Trailer-mounted vibratory apparatus A trailer-mounted crane apparatus includes a trailer supported from a ground surface on at least two wheels. A hydraulically operated crane arm is mounted to the trailer and is extendable outwardly. A crane hydraulic power unit is mounted to the trailer and supplies... | 11/14/2006 |
| 7117758 | Vibration generator for a soil compacting device The invention relates to vibration generator for a soil compacting device referred to as a towed vibrating device. The vibration generator has two parallels arranged unbalanced shafts that each support a fixed and a freely rotating unbalanced mass. An unbalance adju... | 10/10/2006 |
| 7108077 | Power tool A power tool (10) with a housing (12) which accommodates a driven shaft (32) for holding a material-removing tool (40) and which sets the driven shaft into rotary oscillating motion capable of being produced by an eccentric (22) ro... | 09/19/2006 |
| 7104342 | Active rotational balancing system for orbital sanders A system for active dynamic balancing of a rotating tool driven by a motor having a shaft supported by a first and second bearing on opposing sides of the motor includes an acceleration sensing assembly configured to sense radial accelerations on the shaft producing... | 09/12/2006 |
| 7096974 | Handle for a hand-held power tool A hand-held power tool including a tool spindle (12) having a motor (6) for driving the tool spindle (12), a handle (18) having a forwardly inclined position in which the handle (18), starting from the spindle axis (W) is inclined,... | 08/29/2006 |
| 7093657 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 08/22/2006 |
| 7080958 | Vibratory pile driver/extractor with two-stage vibration/tension load suppressor A method and apparatus for driving and extracting piles that includes a vibration/tension load absorber assembly mounted between a housing and the vibratory unit which includes shear-type vibration absorbers connected between the housing and the vibratory unit and o... | 07/25/2006 |
| 7059423 | Jackhammer system A jackhammer system for reducing the vibration and noise experienced by an operator of the jackhammer. The jackhammer system includes a housing, a chisel movably positioned within a lower neck of the housing, a pair of flywheels rotatably attached to a pair of suppo... | 06/13/2006 |
| 7036703 | Hand-held working tool The present invention relates to a hand-held working tool, such as a setting device used for driving fastening elements such as nails, bolts, pins and the like into a surface, or an at least partially percussive hand-held tool having a housing part (11) and a... | 05/02/2006 |
| 7017679 | Device for the continuous adjustment of unbalance of steerable vibration plates The invention relates to steerable vibration plates that are set vibrating by rotating unbalanced masses. By twisting the unbalanced masses relative to one another the resulting forces and their direction of action can be changed, thereby influencing the travel spee... | 03/28/2006 |
| 6988562 | Manual machine tool The invention is based on a hand power tool, having a drive shaft (12, 14) supported in the housing (10) and having a mechanical percussion mechanism (16, 18, 20, 22, 24), which has a striker (26, 28) that is driven in hammering fashion v... | 01/24/2006 |
| 6981558 | Controller for an unbalanced mass adjusting unit of a soil compacting device The invention relates to a controller for an unbalanced mass adjusting unit in a vibration exciter. Said controller comprises an adjusting piston for changing the relative position of unbalanced masses in the vibration exciter that is coupled to a reference piston. ... | 01/03/2006 |
| 6966448 | Trailer-mounted crane apparatus A trailer-mounted crane apparatus includes a trailer supported from a ground surface on at least two wheels. A hydraulically operated crane arm is mounted to the trailer and is extendable outwardly. A crane hydraulic power unit is mounted to the trailer and supplies... | 11/22/2005 |
| 6955219 | Earth loop installation with sonic drilling A method for installing a heat exchange pipe loop in a borehole, the method in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill shoe on a lower end of the casing movable by the soni... | 10/18/2005 |
| 6923269 | Demolition hammer and/or hammer-drill with a percussion device suitable for releasing clamped objects by striking The invention relates to a demolition hammer and/or hammer drill comprising a percussion generating device having a percussion piston moving axially back and forth. In a main percussion mode, the percussion piston impinges upon a tool which can move along a limited ... | 08/02/2005 |
| 6920047 | Electrically isolated module An electronic control module provides dual insulation layers between an internal line voltage and a separate tool housing that serves as a heat sink, thereby allowing versatility in mounting the electronic control module within the tool housing interior, and thereby... | 07/19/2005 |
| 6907943 | Electric hammer It is, accordingly, an object of the present invention to provide an electric hammer with improved construction, while ensuring the vibration reduction performance. According to the present invention, a representative electric hammer may include a hammer bit, a driv... | 06/21/2005 |
| 6908262 | Systems and methods for driving large diameter caissons A system for driving a large diameter caisson into the ground, comprising a crane assembly, a plurality of vibratory devices, a clamp assembly, a suspension assembly, and a timing system. Each vibratory device generates a vibratory force. The clamp assembly rigidly ... | 06/21/2005 |
| 6901666 | Bush cutting machine A bush cutting machine including a prime mover, a cutter and a handle fixed to an operation rod. The handle has left and right end portions carrying grips. Each grip is mounted at a center of gravity of a sum of a mass of a handle portion between a fixed point and a... | 06/07/2005 |
| 6860338 | Device for displacing a load The invention concerns a device for displacing a load (14) comprising a mobile support (12) adapted to support a load and exert on the load a force in a given direction, and device for mechanical balancing (10) interposed between the mobile supp... | 03/01/2005 |
