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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 |
| 7093860 | System for joining sections of composite reinforced line pipe A composite reinforced line pipe is manufactured by aligning first and second pipe segments each having a composite reinforcement wrapped circumferentially about a core, attaching the line pipes at a cut-back portion of their exposed core, wrapping a joint tape circ... | 08/22/2006 |
| 7066498 | Part for connecting a fluid line to an opening of a container comprising plastic material or for closing the opening A part for connecting a fluid line to an opening of a container comprised of thermoplastic material or for closing the opening of the container has a first component and a second component of thermoplastic material. The first component has a surface to be connected ... | 06/27/2006 |
| 6513839 | Pipe joint made of resin In a pipe joint made of resin, a cap nut-like pressing ring is screwed to the outer periphery of a pipe receiving port of a joint body, and presses an inner ring from the outer side of a pipe member as a result of screw advancement toward the joint body. ... | 02/04/2003 |
| 6227951 | High pressure gland nut and collar A high pressure fluid transmission nozzle. The nozzle comprises a circular fluid transmitting tubing threaded in close proximity to a tubing discharge end for receiving a complementary threaded, circular collar. Overriding the tubing and collar is a circu... | 05/08/2001 |
| 5608189 | Screwable introduction means for sleeves or housings A screwable cable seal introduction device for employment at sleeves or housings having an introduction sheath onto which a union nut can be screwed. A press sleeve is located in the inside of the introduction sheath, an annular seal composed of sealing m... | 03/04/1997 |
| 5566985 | Fiberglass pipe with rough wrench surfaces A fiberglass pipe joint with threaded ends has rough surface areas adjacent to such ends which allow strap wrenches to be used to tighten the threads with a high torque that prevents leakage. The rough areas are formed by partially embedded sand grains wh... | 10/22/1996 |
| 5352309 | Method for manufacturing pipe bells A method for manufacturing a filament reinforced plastic pipe including an integral bell, the method comprising the steps of winding a filament bundle, in a plurality of layers, around a mandrel having a cylindrical outer surface to form a pipe including ... | 10/04/1994 |
| 5263747 | Means for and methods of attaching metal hoses to end fittings An end of a convoluted metal hose is connected to an adaptor having an end surface which is rounded to complement a contour of an endmost convolution. A straight section of the convoluted hose extends unbonded some distance through a bore in the adaptor, ... | 11/23/1993 |
| 5213379 | FRP pipe with threaded end joint section A fiber-reinforced plastic pipe with a male-threaded and/or female-threaded end joint section having improved axial strength and thread contour, exhibiting a high degree of seal tightness, and withstanding a high internal pressure. The female threads comp... | 05/25/1993 |
| 5150922 | Electrofusion joint and hot water supply header using the same The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various o... | 09/29/1992 |
| 5106130 | Composite thread coupling for reinforced pipe A pipe joint is provided wherein mating female and male threads are ground or scribed into the ends of the pipes to be joined. At least one of the scribed threads has a paste thread contact molded onto it so that the valley of the contact molded thread is... | 04/21/1992 |
| 5078431 | Electrically insulated pipeline joint for fluid or gas piplines An electrically insulated pipeline joint for use in fluid or gas pipelines is disclosed. Such a joint is used to electrically insulate one section of a pipeline from an adjoining section pipeline. The joint is further designed to preclude physical failure... | 01/07/1992 |
| 5022685 | Secondary containment system and method A secondary containment pipe system disposed around a primary pipe system and comprising a joint that is divided along a central parting plane and has laterally projecting flanges that form internal passages for adhesive sealing cement, that is injected t... | 06/11/1991 |
| 4900050 | Manufacture of bicycle frames In a bicycle frame comprising a plurality of frame members which are selectively joined together at the ends thereof, each of the joints which support the head tube, the seat and the crank housing is a lug joint comprising a plurality of organic fiber lay... | 02/13/1990 |
| 4762583 | Method for making composite twine structures A composite structure comprises at least one ply comprising approximately parallel unidirected twines comprising helically-configured matrix-impregnated continuous strands of filament reinforcements to provide a flanged composite cantilever spring which s... | 08/09/1988 |
| 4624486 | Structure at resin pipe connections A structure at a connection where at least two resin pipes are connected to each other end-to-end. The structure is characterized by annular resin body means provided on the inner periphery of the end of at least one of the resin pipes and having at least... | 11/25/1986 |
| 4611832 | Hose joint A thermosetting resin layer covers the outer peripheral surface of the nipple portion of a joint provided on one end of a connecting pipe. A hose having a reinforcing layer between a single- or double-layer inner tube and an outer tube is inserted over th... | 09/16/1986 |
| 4504086 | Pipe tee A pipe tee comprises a substrate having deposited thereon a reinforcing wrapping of a resin-impregnated filament.... | 03/12/1985 |
| 4367823 | Locking device for connectors and closures A locking device for connectors or closures which device prevents rotation of the means for holding a pair of members in engagement wherein the locking device includes a shield which overlies all surfaces on the locking device which might be engaged by a ... | 01/11/1983 |
| 4358377 | Shear-vectoring design for composite casing end and removable, pressure-locking closure therefor An improved combination of an open-ended casing section and a removable closure inset therein is disclosed. The casing section is of composite structure and comprises an annular bulge of bowed fiber sections which, together with underlying annular resin b... | 11/09/1982 |
| 4327726 | Connector member for dissimilar materials A plastic composition which may be molded into a connector which is capable of simultaneously sealing to both polyvinyl chloride plastics and polyolefin plastics. The plastic composition comprises from 50 to 75 percent by weight of an essentially polyolef... | 05/04/1982 |
| 4200480 | Adhesive joining of pipes Pipe sections of polyester fiberglass, epoxy fiberglass or of other diverse or same materials are adhesively joined together or to reaction vessels by applying to one mating surface an adhesive composition comprising a solution of non-reactive elastomer a... | 04/29/1980 |
| 4132578 | Plastic pipe welding apparatus and method A method and apparatus for welding PVC pipe which includes a means to clamp and apply welding heat so that plastic pipes may be welded while under external pressure adapted to offset internal pressures. The method includes the steps of placing a clamp abo... | 01/02/1979 |
| 4110144 | Mechanically locked bell and spigot coupling for ducts and method of forming A bell and spigot coupling is provided with an abrasive-material insert to increase the disengagement force necessary to uncouple the ducting.... | 08/29/1978 |
| 4106797 | Reinforced fitting construction In forming a reinforced fitting, an inner shell is first formed of alternate layers of glass filaments arranged transversely and parallel to the central axis of the tubular fitting portion of which comprising a part; the filaments are embedded in a matrix... | 08/15/1978 |
| 4043857 | Method of joining plastic pipe An improved heat fused pipe assembly joint is provided using an internally positioned fitting having an annular insert portion substantially the same diameter as the internal diameter of the pipe section to be joined and a shoulder portion having a larger... | 08/23/1977 |
