Bizarre Patents
Pizza Pie With Concentric Rings of Crust
A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.
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| Number | Title | Issue Date |
| 7070394 | Gas pressure driven fluid pump having pilot valve controlling disc-type motive and exhaust valves A gas pressure driven fluid pump comprising a pump tank having a liquid inlet and a liquid outlet. A float, carried within the interior of the pump tank, is operable to move between a low level position and a high level position. A snap-acting valve is operatively c... | 07/04/2006 |
| 6988332 | Air driven liquid pump An air driven liquid pump includes a reservoir, a liquid inlet aperture extending through the reservoir wall for fluid coupling to a liquid inlet duct, a liquid outlet aperture extending through the reservoir wall for fluid coupling to a liquid outlet duct. The liqu... | 01/24/2006 |
| 4842487 | Pumping device using pressurized gas There is provided an improved fluid pumping device including an enclosure to be placed downhole in a well. A first hollow tube is received in the enclosure and extends to the surface of the well for removing fluid from the well. A second hollow tube also ... | 06/27/1989 |
| 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 |
| 4770610 | Frail material slurry pump A pump for pumping a slurry of frail material is provided by a rigid chamber which is connected to a source of negative air pressure when an inlet valve is open and an outlet valve closed to suck the slurry through the open inlet valve into the chamber, t... | 09/13/1988 |
| 4507056 | Liquid circulation apparatus and method Method and apparatus for reducing the resistance to the flow of a liquid from an upper liquid supply container to a lower vacuum receptor tank through an interconnecting port while permitting air displaced from said tank to enter said container through sa... | 03/26/1985 |
| 4181470 | Gas-operated liquid pump A gas-operated liquid pump which includes an outer, stationary compartment and an inner compartment movable between upper and lower positions in the outer compartment. The inner compartment has positive buoyancy in the liquid to be pumped. Valve means ope... | 01/01/1980 |
