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| Number | Title | Issue Date |
| 7836802 | Centrifugal electric impact wrench Disclosed is a centrifugal impact wrench using an electric driving motor, which is rotated by electricity supplied from an electric power source, as a power source. The electric impact wrench includes: a sun gear 21 coupled to a rotation shaft 11 of th... | 11/23/2010 |
| 7377019 | Method and apparatus for fastening together structural components A method and apparatus for fastening a first relatively soft structural component such as a wood panel to a second relatively hard structural component such as a steel angle iron using fasteners each having a forward self-drilling portion, a rearward, self-tapping p... | 05/27/2008 |
| 7322430 | Apparatus and method for reducing required torque A method of reducing the torque required to provide relative rotation of two connected members includes providing impacts at or adjacent the connection between the two members at a rate of at least two impacts per second. An apparatus for reducing the torque require... | 01/29/2008 |
| 7311027 | Electric screwdriver An electric screwdriver capable of reducing the reactive force produced on the occasion of a screw tightening work, etc. The electric screwdriver is designed to transmit the rotational driving force of a first motor to the bit through a bit holder, and it includes a... | 12/25/2007 |
| 7255256 | Finish nailer with contoured contact trip foot A fastener driving device for use in driving a fastener into an elongated contoured portion of a workpiece is disclosed. The elongated contoured portion has a surface that is contoured perpendicular to a longitudinal direction of the elongated contoured portion. The... | 08/14/2007 |
| 7237976 | Key-engaging part structure A key-engaging part structure which realizes an efficient formation of a key-engaging part in an axial-hole member is provided. A key-engaging through hole is formed in a key-engaging part of an axial-hole member while both and portions of the axial-hole member leav... | 07/03/2007 |
| 7237621 | Driving device A driving unit comprises a pneumatic head for being combined to a pneumatic tool; a front end of the pneumatic head being installed with a push rod; a driving unit having a slender driving rod at a front end thereof; the push rod serving to push the driving unit; an... | 07/03/2007 |
| 7207247 | Hammer head wrench An L-shaped wrench with a handle and a shank attached to a hammer head. The hammer head may be hexahedral with the handle and shank attached to adjacent flats with opposing flats forming impact surfaces for applying an axial force along the handle or shank with an i... | 04/24/2007 |
| 7194939 | Pneumatic wrench having reinforced strength A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a support seat, a cam, a cover, and a hammer. Thus, the pivot shaft of the hammer has two opposite sides each formed with a reinforcing rib to rei... | 03/27/2007 |
| 7140282 | Pneumatic wrench having reinforced strength A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a cylindrical support seat, a cam, a cover, and a hammer. The hammer has a protruding engaging portion and a reinforcing rib juxtaposed to the eng... | 11/28/2006 |
| 7089833 | Air actuated pneumatic impact wrench lug bolt tool The invention relates to a device utilizing compressed air for loosening and tightening fasteners that are located in hard to access areas. The device enables a single operator to stabilize the device while applying pressure via a pneumatic hammer to loosen or tight... | 08/15/2006 |
| 7086575 | Magnetically operated driving tool A magnetically operated driving tool includes a body member, first and second stator magnets at opposed ends with like poles facing one another, a movable magnet (traveler), a coupling adjacent each stator coupled to a user-operable linkage, a hammer, and a spring. ... | 08/08/2006 |
| 7082857 | Sliding rail containment device for flexible collated screws used with a top feed screw driving tool A portable hand-held screw driving tool is provided for use with collated strips of screws. A collated strip of screws enters from an upper-rear area of the tool and runs through a pathway or slot in an elongated, movable upper guide mounted at the tool's upper hous... | 08/01/2006 |
| 7080578 | Hand tool with impact drive and speed reducing mechanism A power driven tool useful for tightening and loosening a mechanical fastener includes an impact mechanism. Preferably, the tool is pneumatic and includes a ratchet head and an impact device for providing additional torque to the ratchet head. A planetary reduction ... | 07/25/2006 |
| 7077033 | Socket wrench for power tool This invention discloses device for a socket wrench to be firmly and fixedly combined with a motive tool, where the socket wrench is prevented from falling off from the combining during use. A pin insertion hole is formed in a blind hole with its one end as a closin... | 07/18/2006 |
| 7070079 | No-mar tip for fastening tool A novel work contact or no-mar tip for mounting to a drive probe of a fastening tool having a driver blade for driving a fastener into a workpiece is provided having a pair of wings having resilient contact surfaces for contacting the workpiece, the wings forming a ... | 07/04/2006 |
| 7066371 | Nail gun depth control spacer A nail gun and depth control spacer assembly for ejecting nails into a substrate which contains two or more layers of roofing materials one of which is a compressible fibrous layer. The nails penetrate the substrate but are prevented by the depth control spacer from... | 06/27/2006 |
| 7051622 | Tire-patching tool A tire-patching tool for patching a tire includes a shell, a barrel, a patch feeder, an elastic element, a hammer and an automatic valve. The barrel is connected with the shell. The patch feeder includes a first end inserted in the barrel and a second end for feedin... | 05/30/2006 |
| 7017678 | Threaded stud insertion tool The present invention is directed to a tool assembly for improving the insertion of threaded studs into confined spaces. The tool assembly includes a shaft having a bearing surface and defining an opening that is spaced apart from the bearing surface. The tool assem... | 03/28/2006 |
| 7014089 | Trigger valve apparatus for pneumatic tool A plunger is shiftable in response to a trigger operation by a user. A valve piston has a valve piston chamber therein for slidably accommodating the plunger and an axial bore into which the plunger is inserted. An air passage connects the valve piston chamber to an... | 03/21/2006 |
| 6955282 | Magnetically operated driving tool A magnetically operated driving tool includes a body member, first and second stator magnets at opposed ends of the body with like poles facing one another, a movable magnet (traveler), a coupling adjacent each stator coupled to a user-operable linkage, a hammer, an... | 10/18/2005 |
| 6942135 | Nail gun depth control spacer A nail gun and depth control spacer assembly for ejecting nails into a substrate which contains two or more layers of roofing materials one of which is a compressible fibrous layer. The nails penetrate the substrate but are prevented by the depth control spacer from... | 09/13/2005 |
| 6935207 | Jar lid opener An automatic jar lid opener comprises a cylindrical housing and a truncated conical lid retainer rotatably attached to the cylindrical housing. A rotary hammer assembly is installed in the housing to convert a torque output from a motor assembly in the housing, into... | 08/30/2005 |
| 6918325 | Electric wrench for vehicle repairing The present invention relates to an electric wrench for vehicle repairing which comprises a DC driving motor, transmission gears, a clutch, a power accumulator and a transmission shaft. When the DC driving motor rotates, it will drive the transmission gears which wi... | 07/19/2005 |
| 6910280 | Tape measure that incorporates a marking device A tape measure that incorporates a marking device for allowing an individual to measure and mark a wide variety of materials in a more efficient and economical manner, and for measuring and marking the beginning point of reference and the measured position point sim... | 06/28/2005 |
| 6681663 | Hand tool having a vibration device A hand tool includes a function end such as an box end at one end of the handle and a vibration device is connected to the other end of the handle. The vibration device includes a tubular hollow body for receiving a power supply unit, a driving unit and a... | 01/27/2004 |
| 6526852 | Screw driving tool A screw driving tool including a housing (1), a hollow spindle (3) rotatably supported in the housing (1) with a possibility of a limited axial displacement relative thereto, a screw-in spindle 5 at least partially extending in the hollow cylinder (3), co... | 03/04/2003 |
| 5425293 | Tool for handling a striking screw A driver bit holding sleeve 6 is disposed in a shooting portion 4 so as to enable it to be rotated together with a driver bit 5 struck by a striking piston 2 while permitting the driver bit 5 to be slidably displaced in the shooting portion 4, and a pisto... | 06/20/1995 |
| 5213017 | Neutrally mounted same vibration frequency impact tool A battery powers the motor of an electrically powered impact gun. The body of the gun vibrates at some frequency and an aluminum brush holder therein is configured to vibrate at about the same frequency to minimize chatter and arcing of the brushes on the... | 05/25/1993 |
| 5158354 | Device for screwing and unscrewing screws, bolts and nuts Device for screwing and unscrewing screws, bolts and nuts comprising an electric motor (2), a flywheel (14) fixed on an auxiliary shaft (5) connected to the output shaft of the electric motor by means of a pair of pinions (3, 4) made of elastic plastic ma... | 10/27/1992 |
| 5138915 | Impact pipe wrench A wrench has a handle with a jaw for gripping a workpiece. The jaw is formed of a first jaw member which moves transversely with respect to the handle and a second jaw member which is connected to the handle by an adjustment nut and extension to move rela... | 08/18/1992 |
| 5070750 | Torque limiting apparatus To prevent the head of small sized bolts from being twisted off by a rotary electrically powered impact tool, a structure is provided between the outlet drive of the impact tool and the head of the bolt to minimize the torque transmitted between the impac... | 12/10/1991 |
| 4991472 | D.C. direct drive impact wrench An impact tool comprised of a light weight housing having a forward anvil and hammer compartment, a hollow handle, and a rear cradle to receive a 12 volt motor, its housing and wiring therefor, with the motor removably accessible by the removal of only tw... | 02/12/1991 |
| 4919022 | Ratchet wrench The powered ratchet wrench 10 is constructed of several components. A throttle lever 20 controls the air flow to a rotary air motor 30. The rotary output of the motor is transmitted to the hammer assembly 40 of an impact clutch mechanism. A spring 50 bias... | 04/24/1990 |
| 4905423 | Electric rotary power tool apparatus holdable by hand during operation, kit comprising the same, and novel switch means therefor A power tool apparatus which is hand-holdable during operation serves for facilitating especially heavy duty work, e.g. on a high scaffolding. The apparatus is composed of three building blocks, a central one haivng an elongated enveloping shell and an in... | 03/06/1990 |
| 4821611 | Tightening device By transferring the power fed from a motor to a ratchet mechanism through means of an impact clutch mechanism, a relatively large torque is obtained by the impact clutch mechanism. In addition when a torque greater than a predetermined level is applied to... | 04/18/1989 |
| 4619162 | Hand-holdable electric power tool apparatus An electric rotary power tool apparatus is adapted for loosening jammed or seized automobile wheel nuts or bolts and holdable by hand during operation. It comprises (1) an electric motor laid out to be driven by an electric direct current having an operat... | 10/28/1986 |
| 4585078 | Rotary impact tool Disclosed is a rotary impact tool comprising a case enclosing a drive motor, a hammer member with an inner working surface provided with projections, an intermediate member transmitting rotation from the motor to the hammer member and including a guide ma... | 04/29/1986 |
| 4581964 | Fastener driving tool with improved magazine and feed mechanism A fastener driving tool comprising a tool body defining a fastener drive track, a fastener driver mounted in the drive track for movement through successive drive and return strokes, a magazine providing a space for retaining a coiled strip of fasteners, ... | 04/15/1986 |
| 4561331 | Wheel rim wrench A tool for use in rotating a nut threadedly received on a mediately disposed threaded portion of an elongate connector having a contoured outside end and the tool simultaneously holding the connector stationary. The nut in conjunction with the connector a... | 12/31/1985 |
