Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 6206647 | Waste water disposal system A waste water disposal system, in particular a sewer system, including a plurality of collecting containers (3) each divided into a lower space (8) and an upper space (7) separated by a partition (9) including a valve member (10) therein. Sewer connection... | 03/27/2001 |
| 5525042 | Liquid pump with compressed gas motive fluid An apparatus for pumping liquids to a destination includes a pipe of a first cross-sectional area extending from the liquid to be pumped to the destination. A body having a cross-sectional area less than twice the first cross-sectional area also has an up... | 06/11/1996 |
| 4828461 | Apparatus for metering flowable materials in sand core making machines Apparatus for transferring metered quantities of a flowable bonding agent from a tank into a mixer of a sand core making machine has an upright tubular vessel into which the bonding agent is drawn from the tank by a suction pump and a pressure pump which ... | 05/09/1989 |
| 4439110 | Controlling and regulating device for pumps with constant volume A device for controlling the performance of pumps, having a constant volume such as pneumatic pumps having a constant volume, comprises liquid level detectors, such as magnetic microswitches that cooperate with a magnetized float, and the detectors are ad... | 03/27/1984 |
| 4321017 | Pneumatic ejector control For starting and stopping air injection, a pneumatic ejector for a liquid transport system typified by a municipal sewerage system is provided with an air release valve fitted with a limit switch as a control device.... | 03/23/1982 |
| 4057364 | Fluid transfer systems and valves therefor A pumping system intended especially for highly contaminated liquids uses an air pump for drawing liquid into or discharging the liquid from a vessel by creating respectively a vacuum or a pressurized condition within the vessel. A special valve device is... | 11/08/1977 |
| 3930755 | Air-pressure actuated slurry pump A slurry pump including a pressure tank with an inlet and a lower outlet and having a pneumatically operated, inwardly opening closure at the inlet and a hinged, outwardly opening door at the outlet swingable between opened and closed positions. An extern... | 01/06/1976 |
