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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 8162075 | Vibration dampening mechanism for power tool A powered hammer includes a body in which is disposed a motor and a hammer mechanism driven by the motor when the motor is activated. A tool holder is coupled to a front portion of the body and which is capable of holding a cutting tool. The hammer mechanism, when d... | 04/24/2012 |
| 8091651 | Hand-held power tool A hand-held power tool includes a main element with a normal axis which extends perpendicularly to a tool axis and through a center of gravity. A handle is supported in the plane of motion defined by the tool axis and the normal axis such that it is movable relative... | 01/10/2012 |
| 8069930 | Hand power tool with vibration-damped pistol grip A hand power tool, in particular a drill hammer, percussion drill or percussion screwdriver, includes a pistol grip (2), which is connected in vibration-damped fashion to the tool housing (1). The pistol grip (2) is supported on the tool housing... | 12/06/2011 |
| 8061438 | Hand-held power tool with a vibration-damped handle The invention relates to a hand tool machine (2), in particular a drilling and/or percussion hammer, with a housing (4) and a vibration-damped handle (10) elastically supported relative to the housing (4) with two essentially parallel leg... | 11/22/2011 |
| 8016047 | Electrical power tool with anti-vibration mechanisms of different types An electrical power tool includes a motor, a casing, a casing, a piston, an intermediate shaft, a motion conversion mechanism, and a plurality of types of anti-vibration mechanism. The motor has a drive shaft. The casing accommodates at least the motor. The piston i... | 09/13/2011 |
| 8006778 | Handheld power tool In a handheld power tool, including a first housing part and a second housing part as well as a damping element between the first housing part and the second housing part, the damping element is connectable to the first housing part and the second housing part, and ... | 08/30/2011 |
| 7971656 | Hand-held power tool with a vibration-damped handle with a switch A hand-held power tool, has a housing, at least one partially hollow U-shaped C-shaped handle with a yoke part and two parallel leg parts and supported in a resilient manner such that the handle is movable relative to the housing in order to dampen vibrations, at le... | 07/05/2011 |
| 7971655 | Hand-held power tool with a vibration-damped rounded handle The invention relates to a hand machine tool (2), particularly a percussion drill and/or percussion hammer, comprising a housing (4) having two parallel appendages (20, 22), a hollow, U-shaped, rounded handle (10) with a yoke (24) ... | 07/05/2011 |
| 7938196 | Hand-held power tool with vibration-compensating mass A hand-held power tool includes a main handle, a percussion mechanism striking along a percussion axis, a counter mass displaceable along an oscillation axis which is inclined to the percussion axis and biasing elements for preloading the counter mass to a rest posi... | 05/10/2011 |
| 7921935 | Handheld power tool with vibration-damped handle The invention is based on a portable power tool having a vibration-damped handle (10) which has two legs (12, 14) running in the longitudinal direction (48) of the portable power tool and which is motionally coupled to its housing (28), w... | 04/12/2011 |
| 7886839 | Hand-held power tool with improved vibration-damped handle The hand-held power tool has a vibration-damped main handle. The hand-held power tool has a device for fastening the main handle to a main element configured so that when the main element moves out of a stationary position toward the main handle the main element swi... | 02/15/2011 |
| 7886838 | Hammer A hammer comprising: a body; a tool holder mounted on the body for holding a cutting tool; a handle, comprising a grip portion, pivotally mounted on the body about an axis of pivot; a first vibration dampener which connects between the handle and the body and which ... | 02/15/2011 |
| 7878264 | Hand-held power tool A hand-held power tool includes two vibration-damped handles (21), two handle attachment axles (31) for securing the two handles (21) on the tool outer housing (12), respectively, and extending at an angle to respective longitudinal axes ... | 02/01/2011 |
| 7789168 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus The disclosure describes a handle assembly for a power tool that includes attachment means for attaching the assembly to a housing of a power tool. The handle means is adapted to be held by a user of the power tool and the handle means is mounted to the attachment m... | 09/07/2010 |
| 7766096 | Electrical power tool An electrical power tool (1) includes a housing (10,20,30), an electrical motor (21), a motion conversion mechanism (36), a counterweight holding member (73), a counterweight (74), and support members (71,72). The ele... | 08/03/2010 |
| 7762348 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A power tool has a handle capable of limited movement mounted to its housing. An axle is rotatably connected to the housing and is movable between a first and second positions and is spring biased towards the first position. Arms are connected to and rotate with the... | 07/27/2010 |
| 7721818 | Power tool having a vibration isolating handle A power tool includes: a power tool main body; a handle holder protruding from the power tool main body; a handle extending in a protruding direction of the handle holder and having an arm portion engaging the handle holder; and an elastic body carried between the p... | 05/25/2010 |
| 7703547 | Hand-held impact tools having anti-vibration protection Impact tools (e.g., riveters) are provided with anti-vibration protection by a cushion pad and an elastomeric sheath. The cushion pad may be formed of a shape-conformable elastomeric material which is adapted to being conformably placed onto a rear surface of the im... | 04/27/2010 |
| 7640997 | Breaker tool with vibration damped handle device A breaker tool has a chassis carrying a motor, an impact mechanism operating in a certain working direction, an enclosure rigidly connected to the chassis and surrounding at least the motor, and a handle device including two handles protruding from opposite sides of... | 01/05/2010 |
| 7637328 | Electrical power tool having vibration control mechanism An electrical power tool includes a housing, an electrical motor, a motion conversion mechanism, a weight-supporting member, a counterweight, and a first supporting member and a second supporting member. The first supporting member and the second supporting member a... | 12/29/2009 |
| 7610967 | Hand-held power tool with a decoupling device A hand-held power tool includes a spring-mounted decoupling device (16) for supporting a tool handle (14) on the tool housing (4) and having a first spring-mounted support (18) and a second spring-mounted support (20) that is space... | 11/03/2009 |
| 7591325 | Portable hand-guided power tool A portable hand-guided power tool has a housing and a handle having a first leg and a second leg, wherein the handle is secured by the first and second legs to the housing such that the handle is pivotably connected by the first leg to the housing and the second leg... | 09/22/2009 |
| 7527107 | Working tool with damped handle The invention relates to a hand-held working tool, having a first unit, powered by a vibration on operation and a second unit which may be displaced relative to the first unit. A vibration isolation device is arranged between the first and second unit, having an act... | 05/05/2009 |
| 7523790 | Reciprocating power tool having a vibration-damping handle It is an object of the invention to provide an effective technique for enhancing the effect of reducing vibration of a grip of a reciprocating power tool. According to the present invention, a representative reciprocating power tool may comprise a tool bit, a tool b... | 04/28/2009 |
| 7513317 | Impact tool with vibration control mechanism An impact tool is provided that can efficiently reduce the vibration resulting from the striker and that does not lead to a larger design even with the use of a counterweight mechanism. A counterweight mechanism is provided in a motion converter housing, facing the ... | 04/07/2009 |
| 7500527 | Hand-held power tool with a decoupling device A hand-held power tool includes a spring-mounted decoupling device (16) for supporting a tool handle (14) on a tool housing (4) and having a first support arrangement (18) including a connecting device (22) pivotally supported rela... | 03/10/2009 |
| 7412959 | Manually guided implement A manually guided implement having a housing that accommodates an internal combustion engine for driving a tool. At least an upper handle extends in a longitudinal direction of the implement on an upper side thereof. A first antivibration element connects the handle... | 08/19/2008 |
| 7413030 | Pneumatic hammer drill having vibration damping end cap A pneumatic hammer drill includes a handle body, a pneumatic cylinder, a piston, a tool, and a damping member. The handle body has an upper part that defines a front cavity and that has a rear end. The pneumatic cylinder has a cylinder rear end fitted in the front c... | 08/19/2008 |
| 7404452 | Percussion power tool apparatus A percussion power tool apparatus includes a body relative to which an impacting tool is moved to effect an impacting operation, the apparatus further including an operating member by means of which an operating load is applied in an operating direction to the appar... | 07/29/2008 |
| 7383894 | Pneumatic hammer drill (I) A pneumatic hammer drill includes: a pneumatic cylinder having a cylinder rear end fitted in a handle body, an air passage, and a pressure chamber; and an air valve adjacent to the cylinder rear end. The air valve has a front bearing end, a valve orifice interconnec... | 06/10/2008 |
| 7383895 | Impact power tool It is an object of the invention to provide an improved technique for lessening an impact force caused by rebound of a tool bit after the striking movement of the tool bit. Representative impact power tool (101) includes a tool body (103), a hammer act... | 06/10/2008 |
| 7357380 | Anti-vibration element In order to reduce the formation of inherent vibrations in the coil spring in an anti-vibration element, in particular for a manually operated tool such as a chainsaw, a parting-off grinder or similar device and having a coil spring, an additional mass is positioned... | 04/15/2008 |
| 7341173 | Exhaust gas diffuser and filter system for a pneumatic nail gun The exhaust gas diffuser and filter system for a pneumatic nail gun provides for the diffusion and filtering of exhaust gas, which is typically pressurized air, generated by the pneumatic nail gun during usage thereof. The system includes a diffuser plate adapted fo... | 03/11/2008 |
| 7331408 | Power tool housing A transmission housing for a hammer drill comprises two clamshell halves and that mate to define a first transmission housing chamber and a second transmission housing chamber disposed on either side of a ball bearing race. The first and second transmission housing ... | 02/19/2008 |
| 7322428 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A handle assembly for a power tool is described and includes a first substantially tubular body portion 210 which contains a first spring 212. A second body portion 216 is slidably mounted within first body portion 210 and contains a seco... | 01/29/2008 |
| 7320369 | Vibration reduction apparatus for power tool and power tool incorporating such apparatus A power tool has a handle assembly which is biased by a torsional spring. The torsional spring has an engaging arm the position of which is fixed relative to the housing by an adjusting mechanism. The adjusting mechanism has a lever which extends outside the housing... | 01/22/2008 |
| 7308949 | 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... | 12/18/2007 |
| 7300243 | Power blower A power blower has a fan housing, a blowing fan accommodated in the fan housing, a drive source for driving the blowing fan, an operating handle connected to the fan housing for gripping by an operator of the power blower, and at least one vibration damping member i... | 11/27/2007 |
| 7287601 | Power tool with a rotating and/or hammering drive mechanism A hand-operated power tool has a housing with a drive mechanism for driving a tool, a tool receptacle for receiving a tool, a handle assembly for grasping and handling located in a rear region which is remote from the tool receptacle and engaging the housing, wherei... | 10/30/2007 |
| 7270320 | Antivibration element An antivibration element (1) is especially for a portable handheld work apparatus such as a motor-driven chain saw or a brushcutter. The antivibration element includes a coil spring (2) and at least one guide. An end section (7, 8) of the coil s... | 09/18/2007 |
