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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 |
| 7331773 | Pump provided with exhaust valve device and hemodynamometer incorporating the same A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air into the pump chamber and to supply the introduced air to the air chamber. An exhaust va... | 02/19/2008 |
| 7284971 | Hermetic compressor A hermetic compressor comprising a discharge valve, and a stopper for restricting an opening degree of the discharge valve. The discharge valve includes a body portion configured to cover a discharge port formed at a valve plate, and a first protrusion extending fro... | 10/23/2007 |
| 6971168 | Compressor valve plate A method of manufacturing a compressor valve plate (36) comprises at least the following steps in succession: blanking of a blank of the plate (36) from a steel sheet of suitable thickness, punching holes corresponding to the output and intake openings... | 12/06/2005 |
| 6942472 | Head pressure relief assembly A head pressure relief assembly for relieving pressure in the head assembly of an air compressor may include an exhaust valve post formed in the head assembly and an exhaust valve assembly comprised of a flapper valve. An aperture may be formed through the exhaust v... | 09/13/2005 |
| 6358024 | High capacity supply pump with simultaneous directly actuated plungers A high pressure fuel supply pump comprising a housing (102) and a pump body (108) fixed within the housing along a body axis and including a plurality of radially oriented plunger bores (20), each bore having a plunger (22) disposed therein. An actuating ... | 03/19/2002 |
| 5364244 | Pump arrangement including flag type inlet valves with spherical seating New valves to allow or prevent material flow through a conduit are disclosed. Such valves comprise a valve seat having a longitudinal axis, defining a through opening and including a seating surface which defines a portion of the through opening. A valve ... | 11/15/1994 |
| 5334001 | Mounting arrangement for a positive displacement slurry pump A positive displacement pump includes a vertical pump cylinder or body formed from an extruded tube or pipe of rigid plastics material, and the pump body has a lower end portion connected by an annular compression coupling and a set of bolts to a mating p... | 08/02/1994 |
| 5328338 | Hermetically sealed electric motor compressor A hermetically sealed electric motor compressor, comprising a hermetically sealed casing, a reciprocating compressor unit mounted within the casing and compressing a working fluid, the compressor unit having a first discharge passageway, a valve assembly ... | 07/12/1994 |
| 4948351 | Pressure sewer pumping system with check valve arrangement A sewage pumping system for use in residential sewer systems. The pumping system includes a sump, a intake conduit, a discharge conduit, and a pump for pumping sewage from the sump through the intake into discharge conduits. The pump is a piston type pump... | 08/14/1990 |
| 4895494 | Interchangeable manifolds for diaphragm pumps A double acting diaphragm pump includes a flat valve construction which is reversible to provide valving for both the inlet and outlet to the pumping chamber. A modular manifold construction cooperates with the flap valve construction to facilitate ease o... | 01/23/1990 |
| 4699574 | Low head, high volume pump apparatus and method Two concentric vertical cylinders are separated by three radial partitions. An opening at the bottom of one of the partitions connects an air cell on one side of the partition with an outlet chamber on the other side of the partition. The two other partit... | 10/13/1987 |
| 4165208 | Intravenous delivery pump The present invention comprises a small, precise measuring pump provided with a germ barrier that is specifically designed for intravenous feeding devices and comprises: inlet and outlet chambers which are preferably integral one with the other, an inlet ... | 08/21/1979 |
| 3998243 | Flapper valve for a rotary compressor The flapper valve is to be utilized in a compressor of the type having a valve chamber adjacent a discharge or outlet port. The valve comprises a flexible valve member in the valve chamber which has a port closure at the front end thereof to seal the disc... | 12/21/1976 |
