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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 8075311 | Removably fixing a dental instrument with a retractable catch relative to a drive shaft axis A head assembly for attaching to a dental instrument has a body, a rotary shaft with a pinion thereon, at least one retractable catch latching lever and a retractable catch. The rotary shaft has a central bore suitable for receiving a shank of the dental instrument ... | 12/13/2011 |
| 7645138 | Device for locking a dental instrument on a handpiece consisting of a rotating spindle, locking spring and push-button assembly The invention concerns a device for locking a dental instrument having a rotating spindle, formed by a hollow spindle and adapted to receive the head of an instrument, and a locking spring formed by a lower ring extending on a common side by two branches or a plural... | 01/12/2010 |
| 7356867 | Rotatable vehicle rim cleaning device A hand-operable brush for cleaning the crevices of vehicle rims includes a handle having adjacent internal compartments and proximal and distal ends. The handle has an outer surface with linear grooves for assisting an operator to maintain a sufficient grip. The dis... | 04/15/2008 |
| 7338051 | Tool holder for a rotary hammer A tool holder (1) for a rotary hammer which has a tube like tool holder main body (10) having a side wall formed with through holes (11) for receiving corresponding locking bodies (12) and formed with additional through holes (40).... | 03/04/2008 |
| 7331963 | Drill head for use in placing an intervertebral disc device A drill head for preparing the bone of two opposing vertebral bodies to accept the concaval-convex shape of an endoprosthesis includes a form cutter having at least one predetermined milling surface, drive means, and a housing. The form cutter has a profile allowing... | 02/19/2008 |
| 7258547 | Press-type bit-holding mechanism of a dental high-speed handset A press-type bit-holding mechanism of a dental high-speed handset, including a hollow rotary shaft, a push button accommodated in the hollow rotary shaft and a holder barrel also accommodated in the hollow rotary shaft. The push button has a first coupling section f... | 08/21/2007 |
| 7214060 | Handpiece for dental or surgical use At the front, a handpiece (1) has a clamp (10) fitted to tightly grip the shank of a removable tool housed in guide holes (23, 25). The clamp has two or more levers (26) attached to an annular section (22) of the clamp by elastic j... | 05/08/2007 |
| 6955539 | Characterization of motion of dual motor oral hygiene device An oral hygiene device is disclosed having at least two motors to simultaneously vibrate and impart motion upon the head portion of the oral hygiene device, most beneficially at the tip. A first motor is positioned in the handle portion of the device to impart a fir... | 10/18/2005 |
| 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 |
| 6910887 | Device for performing an endodontic treatment A device for use in an endodontic treatment, for example for filling a root canal of a tooth that is empty as a consequence of the removal of the nerve, with a thermoplastic product such as gutta percha, which product is distributed in the root canal by means of hea... | 06/28/2005 |
| 6305935 | Disposable contra-angle A disposable dental contra-angle comprising a plastic housing having a sleeve, a tapered neck, a head and a disposable bur. The bur being removably coupled to a driven rotating mandrel located in the head section. The rotating mandrel having an integral a... | 10/23/2001 |
| 6270087 | Tool shaft coupler Apparatus and methods for coupling a driving shaft and a mating tool shaft to transmit rotational forces and axial tension and compression forces between the shafts. The coupler provides for axial tension transmission through tension transmission surfaces... | 08/07/2001 |
| 6227854 | Releasable chucking device for a rotating medical or dental tool A releasable chucking device for a rotating medical or dental tool includes a tool shaft with a chucking end, wherein the chucking end of the tool shaft has a flattened portion and an annular groove in the area of the flattened portion, wherein the chucki... | 05/08/2001 |
| 6089866 | Drive shaft retention means for prophy angle A dental prophy angle which includes a separate rib for securing each of the drive assembly and a workpiece by a friction lock. Preferably this rib is circumferential and present in both the shank end and the head end of the prophy angle. Each rib of the ... | 07/18/2000 |
| 6065966 | Medical or dental treatment instrument for the treatment of body tissue or a substitute material, in particular by cutting, and tool for such a treatment instrument In the case of a medical or dental treatment instrument for the treatment of body tissue or a substitute material, in particular by cutting, with an elongated handpiece which in its front end region comprises a retaining device with a plug-in hole, into w... | 05/23/2000 |
| 6062575 | Tool shaft coupler Apparatus and methods for coupling a driving shaft (60) and a mating tool shaft (50, 50') to transmit rotational forces and axial tension and compression between the shafts. The coupler (15) provides for axial tension transmission through tension transmis... | 05/16/2000 |
| 5704786 | Chuck with a push button release for a dental/medical device A medical/dental device is provided which includes a body having a hollow sleeve and a head at an end of the sleeve. The head defines an upwardly opening chamber which receives a chuck. The chuck includes a bur tube which removably receives a medical/dent... | 01/06/1998 |
| 5584689 | Angled or straight handpiece with a releasable mounting device for a tool, in particular for medical purposes In a handpiece (2) having a housing (3), a drive sleeve (7) mounted therein, into which drive sleeve a tool (9) can be inserted with its shaft (11) and which drive sleeve is mounted in the housing to be rotatable around its middle axis (9a) by a drive, a ... | 12/17/1996 |
| 5518398 | Dental handpiece having rotatable contact member A dental handpiece contains a tool for dental treatment operation, tool holding members for detachably and rotatably holding the tool, tool detachment members for abutting against the tool holding members to detach the tool from the tool holding members, ... | 05/21/1996 |
| 5490683 | Tool shaft coupler Apparatus and methods for coupling a driving shaft and a mating tool shaft to transmit rotational forces and axial tension and compression forces between the shafts. The coupler provides for axial tension transmission through tension transmission surfaces... | 02/13/1996 |
| 5219174 | Drill chuck for a drill to be used particularly for surgical purposes A drill chuck is provided for surgical drilling machines in which the entire chuck is made of material permeable to X-radiation.... | 06/15/1993 |
| 5090905 | Endodontic filing tool An endodontic filing tool which can be chucked into a dental tool holder with slight play but secured against rotating movement as well as against axial movement by chucking balls. A circumferential groove is provided at the rearward end of the tool shaft... | 02/25/1992 |
| 5090906 | Push-button control device for a dental instrument The cutting shank of an instrument to be received in the head of a contra-angle of a dentistry handpiece is clamped in position with a pushed-button control device which is displacable counter to a tensioning spring. The control device generally takes the... | 02/25/1992 |
| 5037299 | Chucking device for dental handpiece A chucking device for a dental handpiece includes a dental bur having a retention groove, a stationary disk having a central opening, a pair of locking members having projecting engaging portions for engaging with the reaction groove, a retention spring f... | 08/06/1991 |
| 5028181 | Quick change right angle and offset drill head A quick change right angle drill head incorporates mechanism rotating components within the drill head housing thereby resulting in a more compact package which facilitates use in space-limited locations. A single push button release enlarges a chuck open... | 07/02/1991 |
| 5020994 | Dental prophylaxis angle A dental prophylaxis angle formed of molded plastic parts is provided, which includes two accurately supported rotors extending at right angles to each other in an easily manufactured construction. The prophylaxis angle includes an elbow-shaped forward ho... | 06/04/1991 |
| 5011408 | Chuck device for dental handpiece A chuck device for a dental handpiece includes a dental bur, a sleeve for accommodating and attaching the dental bur, a push button for detaching the dental bur, and a connecting-removal unit for removably holding and securing the dental bur within the sl... | 04/30/1991 |
| 4954082 | Reciprocating dental tool There is provided a dental tool for use with a reciprocating drive means and a sleeve member operatively connected to the drive means for reciprocating motion and designed to retain a dental tool, the dental tool comprising a shank portion designed to be ... | 09/04/1990 |
| 4940410 | Dental tool holder A dental toolholder (2) has an endodontic filing tool (18) which is clamped in the toolholder so as to be secured against rotational and axial movements. A vibrating movement is impressed on the tool. The tool (18) can be clamped at its rear shaft end wit... | 07/10/1990 |
| 4820154 | Dental instrument with a tool for treating the teeth A dental instrument employs a tool having an upper portion for use in contacting teeth and a lower portion defining a shank with a lower end, a hollow elongated gripping holder having an opening at one end, a device in the holder communicating with the op... | 04/11/1989 |
| 4802852 | Irrigated drill and quick-release chuck assembly An electric motor-driven drill has an irrigating tube for squirting water onto a drill bur. The tube has convolutions surrounding the motor for cooling the motor and warming the irrigating water. A quick-release chuck holds the bur shank coupled to the mo... | 02/07/1989 |
| 4802848 | Parapulper restorative pin and driver assembly The parapulper restorative pin comprises a stem provided with a handle permitting to operate it manually, the dentist rotating this handle by gripping it between his fingers. This handle is provided with four longitudinal grooves constituting holds for fo... | 02/07/1989 |
| 4781589 | Clamping arrangement, especially for dental instruments A clamping arrangement, especially for the clamping or gripping engagement of dental implements, consisting of a receiving sleeve which is rotatably supported in a handpiece and is connected with a rotary drive, which includes at least one rod-shaped elon... | 11/01/1988 |
| 4728292 | Dental apparatus A dentinal retention pin and dental tool for inserting the retention pin into the healthy dentine portion of a tooth. A cylindrical hole with a beveled top is predrilled in the tooth to receive a threaded end portion of the pin such that the threads cut i... | 03/01/1988 |
| 4661062 | Dental handpiece contra-angle head This contra-angle head of a dental handpiece comprises means for axially locking the dental instrument, in the form of a hollow guide member enclosing the upper portion of the driving pinion inside the head casing, this guide member being mounted for axia... | 04/28/1987 |
| 4484891 | Vibratory endodontic device A vibratory endodontic device is described for mechanical preparation of dental radicular canals, i.e., root canals, prior to their obturation. The device includes a housing, a vibratory drive means supported within the housing to minimize the transfer of... | 11/27/1984 |
| 4398886 | Rotatable socket for a dental handpiece A rotatable socket for supporting a tool for rotating in a head housing of a dental handpiece, includes a catch device which includes at least one catch member movable between a locking position for retaining a tool in the socket and an unlocking position... | 08/16/1983 |
| 4378212 | Rotary driving apparatus having a collet with a magnetic latching mechanism A rotary driving apparatus having a collet housing defining a passageway which is adapted to receive, engage and rotate a bur having one end thereof which terminates in a notched bur key formed of a magnetizable material having a driving shaft having a fi... | 03/29/1983 |
| 4371342 | Dental anchoring means Dental anchoring means includes a cylindrical shank having a turned over portion at one end and an integral threaded pin at the other end which is detachable from the shank. The anchoring means locates in holding means in the form of a sleeve with a longi... | 02/01/1983 |
| 4370132 | Rotatable socket for a dental handpiece A rotatable socket for supporting a tool for rotation in a head housing of a dental handpiece. The socket includes a cylindrical or hollow tubular shaft for supporting a tool extending out of one end and having a dog for engaging a flattened surface on th... | 01/25/1983 |
