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William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7367757 | Electric drill with modified bit gripping assembly An electric drill (10) has a drive assembly (31, 70), and a pivot head (32) having first and second bit gripping assemblies (14, 22) disposed at 90 degrees to each other. The electric drill (10) also includes means for adjusting th... | 05/06/2008 |
| 7335208 | Tightening instrument for orthopaedic surgery of the spine The tightening instrument is made up of two parts (2,4) joined to each other by means which are designed to automatically uncouple the said two parts (2,4) by shearing rupture of a pin (8) when a predetermined tightening torque is reached, a fir... | 02/26/2008 |
| 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 |
| 7318691 | Tool apparatus for milling machine The present invention provides an automated-torque controlled tool for attachment to a milling machine. The tool comprises an elongated hollow housing defined by a neck section, a middle section, and a bottom section. The neck section is adapted to engage a spindle ... | 01/15/2008 |
| 7290964 | Drilling/tapping/unscrewing apparatus A drilling/tapping/unscrewing apparatus including a transmission shaft of a power source on which a drilling ratio gear, a tapping ratio gear and an unscrewing ratio gear are mounted for transmitting the power of the power source to a bit. The apparatus further incl... | 11/06/2007 |
| 7281307 | Tap process for hard workpieces A process and apparatus for producing screw threads in hard material workpieces with a series of taps. The present invention employs a threaded bore formed in a bracket assembly to align and position multiple taps on a rotary machine. The taps are used in sequence t... | 10/16/2007 |
| 7264106 | Positioning device and conveyor system with the positioning device The positioning device for positioning a movable conveyed goods carrier on a conveyor track in a clamped position includes a stop device (12); a movement device for a positioning movement and a drive (20) for driving the movement device. The movement d... | 09/04/2007 |
| 7219583 | Pneumatic screwdriver having an adjustable clockwise torque and a maximum counterclockwise torque A pneumatic screwdriver having an adjustable clockwise torque and a maximum counterclockwise torque includes a transmission seat having at least one steel ball hole and a through hole. The steel ball hole installs a steel ball and has a clockwise rotating area and a... | 05/22/2007 |
| 7062979 | Tool and associated methods for controllably applying torque to a fastener A torque tool and an associated method are provided which apply operator-defined levels of torque to a threaded fastener. In one aspect, a portable, battery powered torque tool controls the motor to slow further advancement of the threaded fastener once the torque t... | 06/20/2006 |
| 7048479 | Machine tool apparatus A machining tool has a tool holder aligned on an axis of rotation β of its shaft, which axis β is oblique to the axis of rotation of a spindle at a predetermined angle θ. Accordingly, the machining tool may perform oblique machining of a workpiece. A power transm... | 05/23/2006 |
| 7021400 | Power Tool This invention relates to a power tool 1 of the kind having a driven member 15 adapted to releasably hold at least one working element 46. The power tool 1 can operate in either a working mode in which the driven member 15 is drive... | 04/04/2006 |
| 7014397 | Self-aligning handheld tapping tool A self-aligning tapping tool comprises an elongate handle having a longitudinal counterbore through a first end. A tap is received in the counterbore. A collar is operatively secured to the tap. The collar is slightly smaller than the counterbore to enable slidable ... | 03/21/2006 |
| 7008151 | Power driver having geared tool holder A power driver includes a motor and a spindle having a distal end thereof opposite the motor. The distal end has an axial bore formed therein. A gear assembly is disposed operatively between the motor and the spindle so that the motor rotationally drives the spindle... | 03/07/2006 |
| 6997654 | Tapping tool for use with drill press A tapping device is configured to be used within a drill press or lathe or other device capable of holding a cylindrical object. The tapping device has an upper projection for being axially fixed in, for example, a drill press. The remainder of the body of the tappi... | 02/14/2006 |
| 6979335 | Holder for surgical reamer A tool holder for holding a surgical reamer has a head (8) and a retaining device (14, 15). The head has an axis coincident with the axis of rotation of the reamer. The head is provided with at least one radially extending slot (10) receiving a ... | 12/27/2005 |
| 6942485 | Dental handpiece comprising torque-limiting means A dental handpiece is provided including a neck wherein balls are guided in transverse channels of an input shaft and are radially spaced apart by a support piece including a tapered part thrust by a spring. A linking ring is mounted on the end of the input shaft an... | 09/13/2005 |
| 6922933 | Primer removal tool A primer removal tool comprising a starter tap, a holder for the starter tap, one or more setscrews passing through the holder and against the starter tap for securing the starter tap in the holder, a handle, a spacer bushing connected to the center of the handle, a... | 08/02/2005 |
| 6910836 | Impact driver for rotary tools Method and apparatus for improving the efficiency of the rotating cutter of a tool by converting at least part of the rotational torque applied to the cutter to repeated rotational impact forces. ... | 06/28/2005 |
| 6814158 | Hand-guided drilling or percussion drilling machine In a hand-guided percussion drilling machine an arresting coupling non-rotatably coupling a drilling spindle relative to a machine housing is arranged on an intermediate shaft rotatably connected with the drilling spindle and extending parallel to and at a radial di... | 11/09/2004 |
| 6805206 | Hammer A hammer is provided which enables the orientation of a tool or bit mounted within a spindle of the hammer to be rotated to the required orientation. The hammer comprises a housing part having an aperture therein in which a spindle that is mounted so that the spindl... | 10/19/2004 |
| 6543971 | Depth sensitive clutch mechanism for drill Driving engagement is obtained between an arbor held in a machine tool and a collet holder that supports a drill bit by locking balls that are secured in engagement with drive surfaces by a locking ring. A nose cone is adjustably attached to the front of ... | 04/08/2003 |
| 6513604 | Adjustable spindle lock A hammer is provided which enables the orientation of a tool or bit mounted within a spindle of the hammer to be rotated to the required orientation. The hammer comprises a housing part having an aperture therein in which a spindle that is mounted so that... | 02/04/2003 |
| 6343900 | Two-speed pneumatic machine tool This pneumatic machine tool includes a driving shaft (14) driven in rotation by pneumatic drive means (12), a driven tool-carrier shaft (16), a gear mechanism (18) disposed between the driving shaft and the driven shaft to drive the latter, a set of senso... | 02/05/2002 |
| 6340276 | Thread-cutting apparatus with reversal of direction of rotation A thread-cutting apparatus with reversal of the direction of rotation with a sun-and-planet gear with an axially displaceable reversing device for reversing the direction of rotation of a drill, held in the grip of a spindle, which can be pulled out prefe... | 01/22/2002 |
| 6082513 | Clutch device of a miller A clutch device has a shaft rod, a hollow torsion sleeve, a trip device, an outer toothed gear, an inner toothed gear, and a first belt pulley. The outer toothed gear is disposed on the trip device. The hollow torsion sleeve has a plurality of grooves. Th... | 07/04/2000 |
| 6045303 | Rotatable torque adjusting device of rotation tool A rotatable torque adjusting device which is incorporated in a rotation tool for adjusting output torque of the rotation tool is disclosed. The rotation tool has a front end surface on which a support cylinder is provided to rotatably support an output sh... | 04/04/2000 |
| 6019552 | Thread cutter A thread cutter, particularly a reversing chuck with a spindle which can be pulled out, has pressure equalizing pipelines which discharge into an equalizing chamber which is sealed from the outside air by a movable wall.... | 02/01/2000 |
| 5876158 | Drive collet assembly for a tap with overdrive protection A drive collet assembly for an internal thread producing tap. The collet includes a collar that is attached to the stem of the tap using set screws. The collar is received into a recess of the body portion of a drive collet and retained therein using a sp... | 03/02/1999 |
| 5865575 | Self-reversing tapping attachment with shock absorption A self-reversing tapping attachment comprises a forward drive member and a reverse drive member drivingly engageable with a tap spindle drive member, as well as gear members drivingly engageable with the forward drive member and the reverse drive member, ... | 02/02/1999 |
| 5738469 | Torque adjustment control mechanism of a hand drill A torque adjustment control mechanism connected between the motor housing base and chuck of a hand drill and controlled to adjust its output torque, including a connecting barrel connected to the motor housing base, a coupling member mounted within the co... | 04/14/1998 |
| 5628593 | Readily disassembleable tapping attachment with quick change replaceable and maintainable parts and method A self-reversing tapping attachment comprises a housing including a tap holding spindle member, a forward drive member and a reverse drive member the latter two members being interchangeable with one another; at least one internal removable fastener with ... | 05/13/1997 |
| 5603590 | Multispindle thread cutter apparatus A multispindle thread cutter apparatus is proposed, which has a drive shaft (3) to be driven by motor and which has a plurality of work spindles (4). Interposed between the drive shaft (4) and the work spindles (4) is a distributor and reversing gear (33)... | 02/18/1997 |
| 5538371 | Tapper mechanism A tapper mechanism having (i) a rotatable tapper body with a clutch, (ii) a driven shaft having a portion rotatably held coaxially in the tapper body for limited axial motion therein, (iii) an engageable claw connected from the driven shaft for selective ... | 07/23/1996 |
| 5437524 | Torque-adjustment controller Disclosed is a torque-adjustment controller for use with a tool to safely adjust and control the torque the tool works on a workpiece. The torque-adjustment controller mainly consists of a housing, an output shaft, an input shaft, a stepped ring, a lugged... | 08/01/1995 |
| 5358362 | Tapping attachment for radial tapping A tapping attachment for use in connection with radial tapping comprises a tap spindle member rotatable in a tapping direction, a driven part engageable with a driving part from a power source in a different direction from the tapping direction, a forward... | 10/25/1994 |
| 5354154 | Attachment of a tapping head to a drive unit A stabilizing support attaches a tapping head to a drive having a spindle rotatable within a quill. The support includes a substantially cylindrically symmetric hollow tubular housing axially divided into two sections. A first section has a first bore siz... | 10/11/1994 |
| 5277527 | Torque adjustment device A torque adjustment device is disclosed which enhances durability and in which it is easy to set a maximum torque and to perform fine adjustment while normally keeping constant a rotational force of a torque adjustment sleeve. A cylindrical clutch adjustm... | 01/11/1994 |
| 5263799 | Threading apparatus A threading apparatus has a rotatable and axially movable driving part, a driven part which is axially displaceable relative to the driving part and adapted for driving a threading tool, a switchable form-locking coupling device including a switching memb... | 11/23/1993 |
| 5209616 | Drive in tapping attachments In self-reversing tapping attachments improved ball drive means are connectable to source of rotational drive and drive transmitting means are engagable, with the drive means including at least one driving ball member and with the drive transmitting means... | 05/11/1993 |
| 5203651 | Tapping attachments A tapping attachment for driving a tapping spindle constructed to be adapted for both direct drive and reverse drive of the spindle. The drive of the spindle is by way of a resiliently mounted dog ring having rigid radially extending drive dogs, extending... | 04/20/1993 |
