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| Number | Title | Issue Date |
| 7263920 | Torque impact wrench A torque impact wrench having an elongated tubular metal housing. The front end of an impact wrench is secured to the rear end of the housing by a motor mount. The front end of the drive shaft of the impact wrench is inserted into the rear of an impact socket. The r... | 09/04/2007 |
| 7137458 | Impact mechanism for a hammer drill An impact mechanism for a hammer drill, which has a housing and a drill bit protruding outside the housing, is provided. The mechanism includes firstly an impact platform within the housing; the impact platform is in connection with the drill bit for receiving impac... | 11/21/2006 |
| 6959478 | Shockproof spindle A shockproof spindle includes a spindle inserted into an elastomer having a compressible structure, and a sleeve having a hollow cylinder, sequentially. The sleeve caps the elastomer while the elastomer is pressed on the top of the base fixed at the bottom end the s... | 11/01/2005 |
| 5025869 | Impact drill A power-driven impact drill includes a spindle extending at a right angle to the axis of rotation of a drill bit, a rotational first hammer slidably mounted on the spindle for co-rotation therewith, and a reciprocal second hammer slidably disposed in fron... | 06/25/1991 |
| 5002134 | Rotary impacting apparatus A rotary impacting apparatus comprises rotary member drivingly rotated about a rotational axis within a casing. An impact member is loosely held by the rotary member so as to be movable toward and away from the rotational axis within a limited range. A ho... | 03/26/1991 |
| 4867251 | Impact device An impact device having a housing with hollow cylindrical aperture therein. The cylindrical aperture has a rotatable member within. The rotatable member has axial multiple rods thereon. On each rod of the rotatable member there are captive annular masses ... | 09/19/1989 |
| 4593767 | Impact device Impact device comprising a housing with a rotatable impeller located eccentrically therein. The impeller includes masses located in radial apertures which, upon rotation of the impeller, are caused to strike the head of an impact tool extending at least p... | 06/10/1986 |
| 4356008 | Knocking arrangement for electric precipitation A knocking arrangement for cleaning electrodes of an electric precipitator has a plurality of hammer members mounted on a rotary shaft, a plurality of anvil members arranged so that the hammer members strike against the anvil members, and connecting eleme... | 10/26/1982 |
