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| Number | Title | Issue Date |
| 8122788 | Variable gear ratio ratchet This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds ... | 02/28/2012 |
| 7987745 | Variable gear ratio ratchet This invention relates to a fastener driving device including a variable ratio gear mechanism that enables the ratio of the rotation of the handle to the rotation of a driving bit extending from the handle to be varied to allow the bit to rotate at different speeds ... | 08/02/2011 |
| 7284463 | Attachment for a socket wrench, and method The invention includes an attachment for a socket wrench that is capable of imparting torque about an axis simultaneously in opposite directions. The invention also includes a method for imparting torque about an axis simultaneously in opposite directions. ... | 10/23/2007 |
| 7255028 | Multi-bit precision screwdriver In one embodiment, a screwdriver having interchangeable bit bodies with permanently affixed bit heads is provided. In another embodiment, at least one transparent end cap is provided to display a bit head in an engaged position ready for use. In another alternative ... | 08/14/2007 |
| 7225707 | Torque wrench with quick-release gear set The torque wrench with quick release gear set is a system having a rotary actuator drive unit, which is attachable to a planetary drive gear set by a quick-release cylindrical adapter and collar so as to provide quick interchangeability of gear sets without the use ... | 06/05/2007 |
| 7171872 | Adjustable mechanical screwdriver An adjustable mechanical screwdriver, having a receiving housing, gear housing and a deflection bevel gear. A small structural size is achieved because the driveshaft protrudes with a bearing shoulder at the drive bevel gear in a direction of the bearing shaft, whic... | 02/06/2007 |
| 7168340 | Ratchet wrench having constant drive Ratchet wrenches are provided that allow for drive on both the forward and return strokes of the ratchet handle. A combination ring gear, sun gear and planetary gear system is used in combination with a drive pawl arrangement to achieve power drive in both direction... | 01/30/2007 |
| 7140277 | Device for quickly releasing socket from extension rod An extension rod includes a polygonal recess in a first end thereof and a polygonal connection end on a second end of the rod. An axial recess is defined in the second end of the rod and communicates with an inclined passage and a receiving hole in the connection en... | 11/28/2006 |
| 7089829 | Multi-functional ratchet wrench A multi-functional ratchet wrench has a wrench body, a ratchet, a pawl, a trigger, a lug connector and a socket connector. The wrench body has a head in which the ratchet is rotatably mounted and the pawl control the direction of rotation when moved by the trigger c... | 08/15/2006 |
| 7073606 | Manual machine tool The invention is based on a power tool comprising toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) a... | 07/11/2006 |
| 6899653 | Fastener with gear assembly A fastener with a reduced gear affect. The fastener of the present invention comprises a handle assembly having an end and an opening wherein a shaft assembly is positioned within the opening and extending from the opening. The fastener further comprises a switch as... | 05/31/2005 |
| 6810773 | Open end ratchet wrench An open-end ratchet wrench includes a housing defining a handle and a head with an open mouth for receiving first and second elements of a work piece therein. A fixed jaw member on the wrench engages the first element and a moving jaw member engages the second eleme... | 11/02/2004 |
| 6786114 | Gripwheel driver and method of attachment to obtain unique properties A hand operated device and method for assisting a user in driving the device's shaft to impart driving force to a fastener more than conventionally accomplished in a fixed period of time. The device has a first member and a second member gripped with the user's firs... | 09/07/2004 |
| 6681660 | Variable speed ratchet wrench and method of use A variable speed ratchet wrench comprising a main handle portion with an opening for receiving a planetary gear mechanism, a planetary gear mechanism with a locking device attached to an output shaft for driving wrench fittings, and a planetary gear housi... | 01/27/2004 |
| 6578451 | Remote bolt installation tool Fastener gripping apparatus (10) can be used in connection with a shaft (14) having a driver portion (80) adapted to engage a bolt (3). The apparatus is used to move the bolt between an uninstalled condition, and an installed condition in a structural mem... | 06/17/2003 |
| 6401572 | Torque tool The torque tool comprises a torque converter including three planet carriers which encase three planetary gears. Each of the three planetary gears includes a sun gear and three planet pinions. Each of the three planet carriers has an input disc-shaped pla... | 06/11/2002 |
| 6295895 | Hand tool with supporting arm and retaining mechanism and a method for loosening of attachment means The hand tool includes tree main parts, a support arm, a torque application arm and a socket. The socket is intended to grip into the bolt head and mediate a torque from the axle of the hand tool. The support arm forms a holding-up against a supporting ba... | 10/02/2001 |
| 6289769 | Electromagnetic nutrunner socket collar A bolt retaining device for a nutrunner which includes a socket having a longitudinal axis and being sized to fit the bolt, the device having an electromagnet positioned with respect to the socket to generate a magnetic field directed along the axis of th... | 09/18/2001 |
| 6155139 | Pneumatically operable screw driver An air motor is provided in a housing and driven by the compression air introduced from an intake port. An anvil, receiving the rotational force of the air motor, has a rear end accommodated in the housing and a front end protruding out of the housing. A ... | 12/05/2000 |
| 6035746 | Gear transmission cartridge A cartridge includes two stems rotatably received in a housing and each having a gear extended inward of the housing. A gear transmission device is coupled between the gears of the stems for allowing one of the stems to be driven by the other stem with a ... | 03/14/2000 |
| 6012359 | Gear transmission cartridge A cartridge includes a housing having two orifices for rotatably receiving two stems respectively. The stems each has a gear extended inward of the housing. A gear transmission device is coupled between the gears of the stems for allowing one of the stems... | 01/11/2000 |
| 5931062 | Efficient mechanical rectifier A mechanical rectifier efficiently rectifies or converts alternative clockwise and counterclockwise rotation of a main handle or other active driving element into unidirectional rotation of a main shaft. This mechanical rectifier is useful in manual tools... | 08/03/1999 |
| 5924339 | Screwdriver A screwdriver is disclosed. It includes a grip, a connecting stem, a receiving member, a transmission shaft and a rotary wheel. In general using state, a user can quickly tighten a screw. In the case that a great torque is necessary, the grip of the screw... | 07/20/1999 |
| 5650573 | Motor driven screwdriver A motor driven screwdriver has a drive train including a driving shaft, a driven shaft, and a planetary transmission arranged between the shafts, a measuring value transducer located in the drive train for determining a torque transmitted in the drive tra... | 07/22/1997 |
| 5616095 | Force multiplier tool The force multiplier tool comprises a planocentric hypocycloidal gearing mechanism adapted for hand tool use. Specifically, the tool comprises a ring gear, a first and a second pinion gear disposed inside said ting gear and revolving about an input eccent... | 04/01/1997 |
| 5540629 | Mechanism for conteracting reaction torque in a powered, reversible, hand-held rotary driver A reversible hand operated rotary power tool contains an internal mechanism for reducing the reaction torque that would otherwise be exhibited directly upon the housing, and hence imposed upon the hand of the operator. The mechanism is bidirectional, and ... | 07/30/1996 |
| 5406866 | Speed-selectable screwdriver The drive speed of a drive shaft of a screwdriver is selectable by a user by holding a gear transmission housing. Two sets of pinch rollers are employed to rotate the drive shaft at one speed. When the housing is held, one set of pinch rollers is disengag... | 04/18/1995 |
| 5354246 | Mechanism in a powered hand-held rotary driver for counteracting reaction torque A powered hand-held rotary tool adapted for preventing an externally manifested reaction torque upon the hand of an operator consists of a housing, a rotor adapted to be driven for rotation relative to the housing, and a planetary differential mechanism h... | 10/11/1994 |
| 5289743 | Two-speed reduction geared screwdriver A one-piece handle member provided with a bore and a tubular pinion gear fixed to and projecting from a forward end of the handle coaxially with the bore is rotatably mounted on the rearward portion of a single drive shaft against a driven gear fixed coax... | 03/01/1994 |
| 5284071 | Unfolding bolt tightening spanner A spanner for tightening or loosening bolts which includes a handle a fixed section and an articulated section which makes it possible to be opened out in inaccessible locations. Two shafts extend in the handle, one making it possible to open out the arti... | 02/08/1994 |
| 5269733 | Power tool plastic gear train A power tool with a two-part housing has a drive motor with a pinion gear on the motor shaft. A plastic cylindrical ring gear is fixed to the motor in coaxial surrounding relationship with the pinion gear and has attachment lugs which fit between the two ... | 12/14/1993 |
| 5238461 | Reactionlless differential rotary driver having optimized output torques A differential rotary driver includes a power input shaft, a differential gear mechanism arranged coaxial to the power input shaft and having two output gears with mutually opposite rotations, and a housing which rotatably supports both input shaft and di... | 08/24/1993 |
| 5176047 | Tire dismounting tool for large motor vehicles A tire dismounting tool for large motor vehicles has a long cylindrical housing provided with a plurality of main bodies and covers. The interior of the housing is divided into a plurality of receiving spaces, each of which is provided therein with a driv... | 01/05/1993 |
| 5149230 | Rotating dual attachment receptacle apparatus tool A rotating dual attachment receptacle apparatus tool which allows the operator to use more than one tool accessory without the need of frequent changing of the drilling, driving or fastening accessory. The rotating apparatus tool has three (3) major parts... | 09/22/1992 |
| 5125297 | Wheel nut loosening and tightening hand tool A hand tool for use in loosening and tightening the wheel nut comprises a main body, a first cover body, a first shaft bearing, a second cover body, a second shaft bearing, a first drive member, a second drive member, a transmission, and a positioning mea... | 06/30/1992 |
| 5123309 | Integrated spindle actuator assembly for nut-runners Disclosed is an integrated spindle actuator assembly for nut-runners wherein the spindle is pneumatically operated to engage and retract from the intended work device including an internal piston formed on the spindle end in conjunction with a spline whic... | 06/23/1992 |
| 5123308 | Torque multiplying lug nut wrench A compact, torque multiplying apparatus for turning nuts of wheel lugs has an orbiting gear arrangement including an epicycling gear element driven within a housing by a socket wrench. In one case, the housing is held fixed by a tool that mates with adjac... | 06/23/1992 |
| 5105688 | Reversible unidirectional transmission A transmission including two input members for independently driving an output member in a single direction. The direction of the output is reversible. One of the inputs may be a handle and another a motor in the handle.... | 04/21/1992 |
| 5027679 | Fastener driver A tubular arrangement the front end of which defines a fastener outlet is extendably and contractably mounted to a fastener driver body. A drive bit is mounted within the tubular arrangement. A fastener feeder is mounted to the tubular arrangement and con... | 07/02/1991 |
| 5009132 | Torque device Device in the nature of a wrench or the like in which reciprocatory rotary motion is converted to continuous rotation in one direction.... | 04/23/1991 |
