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 |
| 8066493 | Inflation aspirator with collapsible barrel An aspirator for inflating an aircraft evacuation slide, emergency raft or other inflatable device includes a flexible, collapsible aspirator barrel that is inflated during operation to form a substantially rigid tube. According to one embodiment, the inflatable sup... | 11/29/2011 |
| 7314198 | Aircraft evacuation slide with thermally actuated gas relief valve An inflation valve for use with an inflatable emergency evacuation slide includes a thermally actuated gas relief valve having an exhaust port the effective size of which increases with increasing temperature. The exhaust port is metered by a valve member. The valve... | 01/01/2008 |
| 7114572 | System and method for offshore production with well control A system and method is provided for artificially lifting fluids from a formation. The system utilizes a production control unit having a jet pump assembly and valving to both lift the desired fluids and to provide well control. ... | 10/03/2006 |
| 6910343 | Vapor-compression refrigerant cycle with ejector In an ejector cycle having an ejector, a decompression amount of refrigerant between a gas-liquid separator and an evaporator is adjusted by a differential pressure control valve, so that a pressure increasing amount in a pressure increasing portion of the ejector i... | 06/28/2005 |
| 6905135 | Inflator system Inflator module for inflating an airbag with gas including an elongate housing, an elongate block of propellant arranged in the housing and generating gas when burning and preferably, igniter material arranged on the propellant. The igniter material is substantially... | 06/14/2005 |
| 6220271 | Checkvalve unit A checkvalve (1) is provided with an inlet which can be connected to an operating system requiring a negative pressure, e.g. to a braking force amplifier (17), an outlet (3) which can be connected to a negative-pressure system producing a negative pressur... | 04/24/2001 |
| 6035881 | Checkvalve unit A checkvalve (1) is provided with an inlet which can be connected to an operating system requiring a negative pressure, e.g. to a braking force amplifier (17), an outlet (3) which can be connected to a negative-pressure system producing a negative pressur... | 03/14/2000 |
| 6004176 | Aspirator assembly An aspirator assembly having an air-gas mixing tube mated with an aspirator housing cap with a tapered socket interface and wherein an inlet check valve closure mechanism provides for manually selectable permission or prevention of the opening of ambient ... | 12/21/1999 |
| 5813061 | Air pressure driven vacuum sewer system A vacuum sewer system comprises a normally closed sewer valve connected between the outlet opening of a waste receiving unit to be emptied and a sewer pipe, and an ejector. The ejector is an integrated part of the sewer pipe. The sewer pipe includes one p... | 09/29/1998 |
| 5228839 | Multistage ejector pump An ejector pump having a plurality of longitudinally aligned chambers, each chamber including a pair of opposed end walls, at least two of the end walls having a nozzle and a one-way valve, with a connection to compressed gas to the most upstream of the n... | 07/20/1993 |
| 5055003 | Liquid driven jet pump A liquid driven pump has a driving-liquid accelerating nozzle which opens into a pump chamber having an outlet part positioned coaxially with the nozzle. Opening into the pump chamber is an evacuation line which is intended for connection to a space to be... | 10/08/1991 |
| 4880358 | Ultra-high vacuum force, low air consumption pumps Air-operated vacuum pump assemblies are disclosed which provide a maximum vacuum force and a large vacuum flow per volume of air consumption. The present venturi pump assemblies comprise one or more solid ejector housings each having a single longitudinal... | 11/14/1989 |
| 4828306 | Vacuum cup control system A control system for applying and releasing vacuum in a work-gripping vacuum cup includes a housing having a venturi passage for inducing a vacuum within the cup upon the flow of air through the venturi passage. A one-way check valve in a passage extendin... | 05/09/1989 |
| 4566862 | Fluid apparatus and methods, as for inflating inflatable structures In a system for inflating airslides and the like, the pressure of the primary gas supplied to an ejector is controlled so as to maintain a constant mass flow rate into the airslide over its inflation cycle. A controller for controlling the primary gas pre... | 01/28/1986 |
| 4425084 | Ejector device An ejector device having an adjustment characteristic which is stepless variable in dependence of the negative pressure generated by the ejector device. The ejector device comprises a portion (16) for connection with a source of positive pressure which de... | 01/10/1984 |
| 4368009 | Aspirator An aspirator used to inflate flexible structures such as aircraft evacuation slides, rafts, or the like comprises a tubular housing an atmospheric air inlet at one end of the housing, a nozzle within the housing for introduction of high pressure gas downs... | 01/11/1983 |
| 4342200 | Combined engine cooling system and waste-heat driven heat pump An improved engine cooling system is combined with a jet-driven heat pump system for utilizing otherwise wasted heat from an engine to produce refrigeration and heating of cabin, charge air and other media without requiring additional shaft power from the... | 08/03/1982 |
| 4178760 | Filter dust ejector and check valve arrangement in exhaust system of internal combustion engine A filter dust ejector with a built-in check valve as part of the exhaust system of an internal combustion engine, the ejector consisting of an ejector housing with a suction connector for an air hose leading to the air intake filter, and inlet and outlet ... | 12/18/1979 |
| 4120616 | Vacuum cleaner-blower assembly with sound absorbing arrangement A quiet and powerful vacuum cleaner-blower assembly comprises an improved quiet operating electric motor coupled to and driving an improved quiet operating blower. The motor has improved cooling air flow with cooling air inlet and discharge openings dispo... | 10/17/1978 |
