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| Number | Title | Issue Date |
| 7527272 | Chuck A chuck is described, in particular for a hammer drill or chisel hammer, having a chuck body having an insertion opening for holding a tool shank, and a locking element for axially locking the tool shank in the insertion opening, the locking element being movable be... | 05/05/2009 |
| 7360606 | Hand machine tool with a removeable tool holder A hand power tool has a striking element via which a tool (10) in a tool holder (12) can be driven in striking fashion, which the tool holder can be detachably secured—via its body (14)—to a drive part (16) via at least one locking el... | 04/22/2008 |
| 7338051 | Tool holder for a rotary hammer A tool holder (1) for a rotary hammer which has a tube like tool holder main body (10) having a side wall formed with through holes (11) for receiving corresponding locking bodies (12) and formed with additional through holes (40).... | 03/04/2008 |
| 7328753 | Hydraulic breaking hammer with lubricated implement guide sleeve A hydraulic breaker hammer includes a housing with a longitudinal bore, a cylinder sleeve, and a rear end cover engaging the cylinder sleeve. A hammer piston is reciprocally powered in the cylinder sleeve for delivering blows to a working implement inserted in a gui... | 02/12/2008 |
| 7325811 | Chuck A chuck (2) for a hand-held power tool (4), which is connected with a motor-driven spindle (6) of the power tool for joint rotation therewith, includes a locking device for securing a shaft section of an exchangeable working tool and having a ci... | 02/05/2008 |
| 7303027 | Grounding rod driving system A grounding rod driving system for facilitating installation and extraction of a grounding rod includes a sleeve slidably receiving a grounding rod. The sleeve slides along the grounding rod when the grounding rod is being driven into a support surface. A driver is ... | 12/04/2007 |
| 7258349 | Hand power tool A hand power tool selected from the group consisting of a drill hammer and an impact hammer has an exchangeable tool holder, a guide pipe which receives the tool holder at its free end, a locking device arranged on the guide pipe and operative manually for fixing th... | 08/21/2007 |
| 7258350 | Chuck for receiving a rotary-percussion tool A chuck for receiving a working tool (2) rotable about a longitudinal axis (A) includes a receiving sleeve (3) having a guide surface (12) extending along the longitudinal axis (A) and at least three, axially extending, up to a free end surface ... | 08/21/2007 |
| 7121023 | Excavating wear member A rotatable connector pin assembly is disposed within an opening in an adapter nose, with opposite ends of the pin portion of the assembly extending outwardly beyond opposite sides of the adapter nose in axially fixed orientations relative thereto, and is used to ca... | 10/17/2006 |
| 7069676 | Excavating tooth point/adapter assembly methods A rotatable connector pin assembly is disposed within an opening in an adapter nose, with opposite ends of the pin portion of the assembly extending outwardly beyond opposite sides of the adapter nose in axially fixed orientations relative thereto, and is used to ca... | 07/04/2006 |
| 6976325 | Excavating tooth assembly with rotatable connector pin structure A connector pin assembly is disposed within an opening in an adapter nose, with opposite ends of a rotatable pin portion of the assembly extending outwardly beyond opposite sides of the adapter nose in axially fixed orientations relative thereto, and is used to capt... | 12/20/2005 |
| 6691799 | Tool holder A tool holder for a power tool, such as a drill hammer, a chisel hammer, and both, includes a striking mechanism for strikingly driving a tool, a base body, a drive part on which the base body is releasably mounted, at least one locking body for releasabl... | 02/17/2004 |
| 5878823 | Hydraulic breaking hammer A hydraulic breaking hammer having a machine housing including a cylinder bore and an impact piston which is reciprocatingly movable in the cylinder bore in response to an alternating hydraulic pressure, and a tool part having: (i) a head portion fitted t... | 03/09/1999 |
| 5873579 | Protective device for a fluid-operated percussion tool A percussion tool includes a housing part having a frontal end provided with an opening; a tool bit guide supported in alignment with the opening; and a tool bit slidably supported in the tool bit guide and projecting from the housing part through the ope... | 02/23/1999 |
| 5702112 | Tool locking apparatus for machine hammers In the front head (11) of a machine hammer (10), transversely disposed wedges (18) are adapted to lock the working tool (12) so that the working tool (12) is axially movable by form-restricted cooperation with recesses (16) on the working tool (12). Each ... | 12/30/1997 |
| 5542797 | Tool bit and tool bit chuck for manually operated tools A tool for insertion into a tool bit chuck in a manually operated tool used for chiseling and/or percussion drilling includes an axially extending chucking shank (1) with a locking 1groove (2) closed at its ends spaced apart in the axial direction. The ch... | 08/06/1996 |
| 5529445 | Tool bit and tool chuck for manually operated tools A tool bit for insertion into a tool bit chuck on a manually operated tool used for cutting and/or percussion drilling includes an axially extending chucking shank (1). The chucking shank has two axially extending rotary entrainment grooves (2, 3) open at... | 06/25/1996 |
| 5529444 | Tool bit and tool bit chuck for manually operated tools A tool bit for insertion into a tool bit chuck in a manually operated tool used for chiseling and/or percussion drilling has an axially extending chucking shank (1). The chucking shank has two axially extending rotary entrainment grooves (2) open at its e... | 06/25/1996 |
| 5520488 | Tool bit and tool bit chuck for manually operated tool A tool bit for insertion into a tool bit chuck in a manually operated tool, used for cutting and/or percussion drilling, has an axially extending chucking shank (2) with a free end. The chucking shank (2) has two locking grooves (6, 7) located diametrical... | 05/28/1996 |
| 5518345 | Tool bit and tool bit chuck for manually operated tools A tool bit for insertion into a tool bit chuck in a manually operated tool used for chiseling and/or percussion drilling includes a chucking shank (6). The chucking shank has two rotary entrainment grooves (7) located diametrically opposite one another an... | 05/21/1996 |
| 5375950 | Tool and tool holder for manually operated tools The clamping shank (1) of a chisel-cutting and/or percussion boring tool bits has stop faces effective in the axial direction and in the circumferential direction. Entrainment faces (2), open towards a free end of the clamping shank (1) are located upstre... | 12/27/1994 |
| 5348430 | Universal chuck for a machine for piercing a tap hole of a shaft furnace A universal chuck is presented which has the ability to either transmit a tensile or pulling force to the end of a piercing rod or transmit a rotational moment or force to a drill bit on a piercing machine for piercing a tap hole of a shaft furnace. The u... | 09/20/1994 |
| 5170560 | Hand-held nibbling machine A hand held nibbling machine has a manipulatable housing with a drive head in which there is a downwardly opening passage. A tool assembly has an upper portion extending into the passage of the drive head, a lower portion for supporting a die, and a neck ... | 12/15/1992 |
| 5095998 | Ram boring machine In a ram boring machine that has a striking piston displaceable in a tubular housing, a displaceably mounted chisel passing through a housing tip has a collar by which it is guided in a bore in the housing that has a front and a rear stop limiting the str... | 03/17/1992 |
| 5016892 | Drill tool holder A drill tool-holder comprises close to its end at least two radial cavities each opening outwardly of the tool-holder and inwardly of its axial bore, and each adapted for housing a ball, or cylinder, the outlet orifices of the cavities being dimensioned s... | 05/21/1991 |
| 4943192 | Drill bit having a shank with grooves The present invention is directed toward a drill bit which firstly comprises two locking grooves (1,1') diametrically opposed with respect to each other, and secondly, also diametrically opposed, with respect to each other, a first driving groove (3) and ... | 07/24/1990 |
| 4844482 | Drill chuck The drill chuck has an adapter shaft which is held in the drill chuck nonrotatably with axial motion play and formed for receipt in a tool holder of a hammer drill machine. The hammer action of the adapter shaft is transmittable to the end of a drill held... | 07/04/1989 |
| 4840519 | Drill bit for hand drills The invention contemplates an improved drill-bit construction wherein the shank by which the bit is clamped is characterized by (a) three angularly spaced grooves which are continuous over their entire length of engageability to the jaws of a multi-jaw ch... | 06/20/1989 |
| 4775159 | Chuck for a drilling tool A chuck for receiving and holding the shank of a drilling tool includes a chuck member with a central bore. An anvil for transmitting axially directed percussive force extends into a rear end of the central bore. Clamping jaws are movable in guide channel... | 10/04/1988 |
| 4702651 | Tool holder for drilling machines, drilling device as well as drills and set of drills 1. A tool holder for drilling machines, drilling devices as well as drills and drill sets. 2. The tool holder, which is developed as a multi-jaw chuck, has a cylindrical bore 326 into which, with maximum opening of the holder, the jaws 322 engage, or the ... | 10/27/1987 |
| 4630836 | Drill chuck for use in percussion drilling In a chuck for use in a drilling device, such as a hammer drill, capable of performing rotary or rotary/percussion drilling, clamping jaws are provided to secure a tool in the drilling device. The clamping jaws each have a convex surface transverse to the... | 12/23/1986 |
| 4623155 | Drill chuck with radial jaws A drill chuck for a hammer drill apparatus or the like having a plurality of clamp jaws advanceable to and retractable from a chuck drill axis so as to be able to grasp and hold a drill, wherein each of the clamp jaws is advanced into and retracted from a... | 11/18/1986 |
| 4621818 | Hammer drill spindle and chuck assembly The drill chuck comprises a chuck body connected to a drive shaft of a drilling drive device so as to deliver hammer blows to the working tool (e.g. the drill) of a hammer drill and the like, a plurality of clamp jaws which axially guide and hold the dril... | 11/11/1986 |
| 4621819 | Nonloosening hammer-drill chuck A hammer drill having a drive spindle rotatable about a spindle axis and a hammer displaceable axially in the drive spindle has a chuck in turn having a generally tubular chuck body centered on a chuck axis, formed with an axially centered array of axiall... | 11/11/1986 |
| 4619460 | Hammer-drill chuck A chuck is used with a hammer drill having a drive spindle rotatable about a spindle axis and a hammer displaceable axially in the drive spindle, and with a drill bit having a shaft extending along a shaft axis and having a radially outwardly open and at ... | 10/28/1986 |
| 4609199 | Hammer-drill chuck with adjustable axial play A hammer-drill chuck has a tubular chuck body centered on an axis and formed with a plurality of guides angularly spaced thereabout, respective jaws displaceable along the guides between inner and outer positions, and an adjustment element displaceable on... | 09/02/1986 |
| 4602799 | Hammer-drill chuck A chuck has a chuck body centered on a chuck axis and having an axially forwardly opening and axially centered recess and an adjustment ring rotatable but not axially displaceable on the chuck body, having a central hole aligned with the recess, and forme... | 07/29/1986 |
| 4585077 | Drilling mechanism optionally usable as a rotary drill or a hammer drill A manual drilling mechanism can optionally be employed for (i) rotary drilling wherein the rotating motion of a drive spindle may be transmitted to a rotary drilling tool, or (ii) hammer drilling wherein an impact bolt guided in the drive spindle is impac... | 04/29/1986 |
| 4565472 | Drill for hand-held drilling devices A drill is secured in percussion drilling machines and in tool holders of hammer drills by locking elements. The locking elements fit into axially extending grooves formed in the axially extending circumferential surface of the shank of the drill. Webs lo... | 01/21/1986 |
| 4299293 | Percussive tool angular position device A percussive tool has a working tool mounted for reciprocations in a barrel. A collar is arranged between a shank and a working portion of the working tool. The shank of the working tool reciprocates in a guide bushing secured in the barrel to ensure reci... | 11/10/1981 |
