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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 |
| 7963714 | Safety coupling arrangement A safety coupling apparatus which includes first and second annular coupling parts for attachment to first and second coaxial rotatable shafts. The second coupling part defines an axial chamber which has an open end facing the first coupling part, and a radially-ext... | 06/21/2011 |
| 7367738 | Apparatus and method for releaseably joining elements The apparatus and method for releasably joining first and second elements according to the present invention include a retaining member mounted to one of the elements and a reshapeable tube near the retaining member. The reshapeable tube has at least two states, an ... | 05/06/2008 |
| 7264415 | Methods of forming alternating phase shift masks having improved phase-shift tolerance Methods for fabricating alternating phase shift masks or reticles used in semiconductor optical lithography systems. The methods generally include forming a layer of phase shift mask material on a handle substrate and patterning the layer to define recessed phase sh... | 09/04/2007 |
| 7237663 | Bi-directional release mechanism for a torque fuse device A torque fuse device having a bi-directional release mechanism that releases the torque carrying capability of the shafts upon torque overload is provided. The torque fuse device includes a sleeve, a hub positioned within the sleeve, and a hydraulic torque coupler. ... | 07/03/2007 |
| 7144178 | Mask, method of producing mask, and method of producing semiconductor device To provide a mask able to prevent a drop in pattern position accuracy due to the influence of internal stress of a membrane and able to align patterns including complementary divided patterns precisely, a method of producing the same, and a method of producing a sem... | 12/05/2006 |
| 7090060 | Bi-directional release mechanism for a torque fuse device A torque fuse device having a bi-directional release mechanism that releases the torque carrying capability of the shafts upon torque overload is provided. The torque fuse device includes a sleeve, a hub positioned within the sleeve, and a hydraulic torque coupler. ... | 08/15/2006 |
| 7073969 | Method for fabricating a photomask for an integrated circuit and corresponding photomask A method for fabricating a photomask for an integrated circuit. The method includes, for example, providing a substrate with at least one trench, providing a prepatterned surface at the bottom of the trench, and providing a multilayer coating over the substrate. As ... | 07/11/2006 |
| 7063478 | Crystallization apparatus and crystallization method A crystallization apparatus includes a mask and an illumination system which illuminates the mask with a light beam, the light beam from the illumination system becoming a light beam having a light intensity distribution with an inverse peak pattern when transmitted... | 06/20/2006 |
| 7025185 | Torque releasing device In a torque releasing device, a bearing is composed of an angular contact ball bearing, raceway surfaces of which are applied with a pre-load in order that the occurrence of fretting at the bearing during torque transmission may be prevented. Thus is ensured that th... | 04/11/2006 |
| 6999611 | Reticle defect detection using simulation Defects are detected in a reticle used in integrated circuit chip fabrication by obtaining digital image data corresponding to an image of the reticle. Typically, this is accomplished by scanning the reticle using a laser scanner. The digital image data are then pro... | 02/14/2006 |
| 6951319 | Flexible hydraulic latch A latching system includes a flexible hydraulic latch male portion, and a receiving rail female portion. The receiving rail female portion receives the hydraulic latch male portion therein. The latching system includes a hydraulic system for providing hydraulic flui... | 10/04/2005 |
| 6793241 | Modular headliner and inflatable curtain assembly A modular headliner assembly (10) includes an inflatable vehicle occupant protection device (14) adapted to inflate away from a roof (18) of a vehicle (12) into a position between a side structure (16) of the vehicle and a vehicle ... | 09/21/2004 |
| 6481911 | Jointing method for joining preformed bodies In a jointing method for joining preformed bodies, a first preformed body (1) and a second preformed body (2) are located relative to each other. By use of a jointing clamp (10) in a jointing zone of the preformed bodies (1, 2) a space (9) is encased into... | 11/19/2002 |
| 6186691 | Linear joining and sealing device A linear joining and locking device comprises a first receiver member providing a first closure surface thereon and a first linear cavity therein, the first closure surface communicating with the first linear cavity along a first linear aperture defined i... | 02/13/2001 |
| 6113300 | Modular unit, method and device for inserting same The invention relates to a modular unit consisting of two building components having joint surfaces arranged in pairs to be fastened with rivets. In order to ensure perfect meeting of the pairs of joint surfaces, there is a pair of bearing surfaces design... | 09/05/2000 |
| 5879099 | Rigid connection of structural parts in the case of a motor vehicle and tool and method for establishing the connection A rigid connection of structural parts of a motor vehicle and a tool and for establishing the connection are provided. The structural parts are fixed together after a coating during their assembly to one another in a simple, joined and effective manner wi... | 03/09/1999 |
| 5855446 | Hydraulic clamp bushing having sigma shaped bushing ends Hydraulic clamp bushing (13, 14) having a double walled sleeve (7), a hydraulic pressure medium which is trapped in a chamber (5) between the sleeve walls, and a mechanism for pressurizing the pressure medium. One, or both, sleeve walls (7) is/are formed ... | 01/05/1999 |
| 5769487 | Chucking device for accurate mutual fixation of two members A chucking device for accurate mutual fixation of disk-shaped parts or rotationally symmetrical parts. The device has a chucking element that engages with members in a form-fitting manner and has an expansion sleeve that together with the chucking element... | 06/23/1998 |
| 5711628 | Expansion clamp An expandable clamp of the type that is used within a channel to compress a planar member within that channel against a wall of that channel. The clamp has an expandable bladder of an elongated cylindrical shape and a valve for introducing a gas or a liqu... | 01/27/1998 |
| 5236460 | Vertebral body prosthesis A vertebral prosthesis locates between vertebral bodies of a human body. The prosthesis has tubular inner and outer bodies that telescope relative to each other. Each body has a platform on its end. The platform secures to adjacent vertebral bodies. Sharp... | 08/17/1993 |
| 5224789 | Clampable form-fit coupling The invention concerns a coupling for the detachable connection of two components, preferably a shaft with a hub, which for transmission of a torque are rotatably connected with each other by form-fit. When using such plug or form fit connections such as ... | 07/06/1993 |
| 5201842 | Coupling with a hydraulically pressurized hub The invention concerns a coupling with a hub, for transmitting a torque to a shaft, with a cylindrical annular chamber arranged in the hub at a slight spacing from the shaft. The annular chamber can be pressurized with an hydraulically actuated servo valv... | 04/13/1993 |
| 5195838 | Hydraulically securable and angularly adjustable gears A toothed gear is secured to an associated shaft by an expansive sleeve which is expanded radially inwardly by the pressure of a hydraulic actuator.... | 03/23/1993 |
| 5156480 | Frictional resistance coupling The invention relates to a frictional resistance coupling for transmitting torque between two coaxial components, for example a shaft with an articulated shaft, the coupling comprises an outer part and an inner part, which enclose an inner chamber with a ... | 10/20/1992 |
| 5149220 | Frictional resistance coupling A frictional resistance coupling comprises an outer part and an inner part, which are connected to each other in a pressure-tight manner and between them form an inner chamber with a conical surface and a likewise conical, axially displaceable annular pis... | 09/22/1992 |
| 5125759 | Adjustable compliant robotic wrist using an electro-rheological fluid A robotic wrist employs a plurality of elastomeric containers holding an electro-rheological fluid. An electromagnetic field can be selectively applied across the electro-rheological fluid within these elastomeric containers to selectively control the vis... | 06/30/1992 |
| 5102253 | Snap-fit device for joining two parts together A snap-fit device is provided for joining two parts of any shape together by fitting, perpendicularly to their junction surfaces, at least one element projecting from the junction surface of one of the parts, after slight deformation thereof, into a reces... | 04/07/1992 |
| 5051018 | Coupling A coupling for coupling together two mutually coaxial, rotatable parts, comprising a substantially cylindrical coupling member which is intended to be mounted between the parts to be coupled together and which is expandable both radially outwards and radi... | 09/24/1991 |
| 5004370 | Hollow shaft having drive elements with axially varied material properties being secured on the hollow shaft by expansion of the hollow shaft An assembly includes a hollow shaft and drive elements partly formed of brittle material. The drive elements include, as viewed in axial succession, first regions containing material of relatively low ductility and second regions containing material of re... | 04/02/1991 |
| 4958953 | Expandable connector to axially join tubular devices An expandable connector to axially join tubular elements. The connector consists of two confronting hollow parts dimensioned to fit into the ends of axially aligned tubular elements. The parts define together a void having an inflatable elastic casing. Th... | 09/25/1990 |
| 4940354 | Mounting device for mounting a squeegee or inking blade in a printing press The mounting device for the squeegee or inking blade has an elastic clamping tube which can be expanded under a pressurized medium to clamp the squeegee or inking blade in place. The clamping tube is made of resilient material and ensures that the squeege... | 07/10/1990 |
| 4923320 | Disengageable coupling A disengagable coupling comprising a first part (1) affording a bore (3) and a second part (2) comprising a sleeve (5) and a drive flange (6). The sleeve (5) fits in the bore (3) and contains an insert (8) with collars (9,10) between which is defined a ch... | 05/08/1990 |
| 4915537 | Compound joint and method for its production Disclosed herein is a compound joint in which a lower section and an upper section are mated along a common contact plane. Means for positively interlocking the sections are provided in each section. A depressed area on the surface of each of the sections... | 04/10/1990 |
| 4886230 | Camera and other instrument support stand A camera supporting tripod is described with a hip to which legs are attached. The legs are adjustable as to length. In addition, the tripod includes a center shaft mounted to the hip for tilting movement. The center shaft is also adjustable as to length.... | 12/12/1989 |
| 4859106 | Device for connecting two coaxial components fixedly in terms of rotation The invention relates to a device for connecting fixedly in terms of rotation two coaxial components, for example a shaft and a hub, preferably with an outer and an inner sleeve which enclose a tapered annular space and in which a likewise tapered annular... | 08/22/1989 |
| 4782636 | Wall structures A curtain wall structure has a series of panels mounted in a framework with loop-form sealing gaskets around the peripheries of the panels. The gaskets are clamped into sealing contact with the panels by frame members that overlap the edges of the panels.... | 11/08/1988 |
| 4774872 | Prestressed tube and tube joint A joint is provided for joining together two sections of a tube wherein the sections are prestressed by a surrounding pressure medium to press the sections together and to resist forces tending to separate the sections and the bursting pressure inside the... | 10/04/1988 |
| 4752275 | Coupling with a hub for transmitting a torque onto a shaft A coupling for transmitting a torque from a shaft to a hub provided with an internal chamber which can be pressurized and which is relieved when a relative rotational movement takes place in relation to the shaft due to an overload and which is secured ag... | 06/21/1988 |
| 4722633 | Compound joint and method for its production Disclosed herein is a compound joint in which a lower section and an upper section are mated along a common contact plane. Means for positively interlocking the sections are provided in each section. A depressed area on the surface of each of the sections... | 02/02/1988 |
| 4705421 | Coupling between a shaft and a hub A releasable coupling between a shaft and a hub is provided, which coupling includes a device operable by a pressure medium to produce a pressure lack between the shaft and the hub.... | 11/10/1987 |
