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 |
| 7942628 | Turbo compressor A first compression stage and a second compression stage being arranged at positions adjacent to each other. The first centrifugal impeller and the second centrifugal impeller are arranged in such an orientation that back sides of the first centrifugal impeller and ... | 05/17/2011 |
| 7568883 | Turbocharger having two-stage compressor with boreless first-stage impeller A turbocharger with a two-stage compressor having first- and second-stage impellers mounted on a common shaft in a back-to-back configuration. The first-stage impeller has a boreless configuration, defining an unthreaded pilot hole receiving an unthreaded end of the... | 08/04/2009 |
| 7513735 | Multistage centrifugal compressor having a tank which can be opened horizontally Multistage centrifugal compressor having a horizontally openable tank, comprising a lower semi-tank and an upper semi-tank, a shaft having a series of rotors and a series of stages each of which comprising, in turn, a series of lower semi-diaphragms and a series of ... | 04/07/2009 |
| 7407364 | Turbocharger compressor having ported second-stage shroud, and associated method A two-stage radial compressor having a ported second-stage shroud, forming a passive surge control system. Thus, some proportion of the fluid is allowed to flow between the second-stage of the compressor in the vicinity of the impeller blade tips, through a port in ... | 08/05/2008 |
| 7322789 | Methods and apparatus for channeling steam flow to turbines Method and apparatus for assembling a double flow steam turbine is provided. The method comprises providing an annular member having a first end, a second end, and a body extending therebetween, coupling a first arcuate member to the annular member wherein the first... | 01/29/2008 |
| 7305827 | Inlet duct for rearward-facing compressor wheel, and turbocharger incorporating same A turbocharger includes a compressor wheel having back-to-back impellers (i.e., a forward-facing impeller and a rearward-facing impeller) mounted on the same shaft. The two impellers are independently supplied with inlet air via separate inlet ducts and discharge pr... | 12/11/2007 |
| 7241106 | Combined cycle boundary layer turbine A two staged fluid propulsion apparatus of the type which utilizes prior art pitched blades combined with solid boundary layer disks supported by a novel rotating tubular flow conduit perforated to allow fluid flow to from the interior of the tube to the exterior su... | 07/10/2007 |
| 7186074 | Axial flow stream turbines A drum-type rotor carries an annular row of moving blades having root portions held within a slot in the periphery of the rotor. A turbine casing surrounds the rotor and carries a static blade assembly with an annular row of static blades which, together with the an... | 03/06/2007 |
| 7146813 | Power generation with a centrifugal compressor A machine designed as a centrifugal compressor is applied as an organic rankine cycle turbine by operating the machine in reverse. In order to accommodate the higher pressures when operating as a turbine, a suitable refrigerant is chosen such that the pressures and ... | 12/12/2006 |
| 7125219 | High-pressure fan The invention relates to a high-pressure fan which comprises an electric motor provided with a shaft that goes through it; blade wheels which are mainly made of a carbon fibre-based composite material, arranged on both sides of the electric motor and mounted directl... | 10/24/2006 |
| 7044716 | High-pressure multi-stage centrifugal compressor A high-pressure multi-stage centrifugal compressor is provided containing at least three compressor elements which are arranged in series as compressor stages, and at least two electric motors to drive these compressor elements. At least one compressor element forms... | 05/16/2006 |
| 7014418 | Multi-stage compressor and housing therefor A multi-stage compressor and associated compressor housing and method are provided. The housing defines an aperture for receiving a compressor wheel for successively compressing a gas in first and second stages. First- and second-stage inlets are fluidly connected t... | 03/21/2006 |
| 6971842 | Low pressure steam turbine exhaust hood An exhaust hood for a turbine includes a shell casing, an external support structure, conical corner plates, and a butterfly plate. The shell casing includes an inner surface and an outer surface. The external support structure is coupled to the shell casing outer s... | 12/06/2005 |
| 6910483 | Double-ended blower and volutes therefor A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can ... | 06/28/2005 |
| 6783321 | Diffusing coupling cover for axially joined turbines The shafts of upstream and downstream turbines are interconnected by a coupling. A diffuser is provided in an intermediate cavity between the upstream and downstream turbines to recover kinetic energy, as well as minimize or eliminate windage and spinning losses res... | 08/31/2004 |
| 6752589 | Method and apparatus for retrofitting a steam turbine and a retrofitted steam turbine A first steam turbine of a reaction stage design is retrofitted to form a second turbine of a substantially impulse stage design using common components with the first turbine. To retrofit the new steam path into the first turbine, the upper outer and inner shells a... | 06/22/2004 |
| 6733230 | Low noise impeller pumps An impeller pump has a pump casing (6) that defines a pump chamber. The pump chamber includes a first chamber (21) and a second chamber (22). An impeller (10) is rotatably disposed within the pump chamber. The impeller has a first groove ... | 05/11/2004 |
| 6447244 | Centrifugal pump apparatus and method for using a single impeller with multiple passes A method of increasing the pressure of a fluid in an aircraft centrifugal pump by forcing the fluid to make multiple passes through one impeller of the aircraft centrifugal pump is provided. It includes providing fluid through a pump inlet to an aircraft ... | 09/10/2002 |
| 6345952 | Steam turbine A steam turbine has a turbine shaft directed along a turbine axis. A plurality of turbine stages, each include a guide-blade structure and a moving-blade configuration located axially downstream of the guide-blade structure. The guide-blade structure and ... | 02/12/2002 |
| 6305901 | Steam turbine A steam turbine has a high-pressure turbine section and a medium-pressure turbine section fluidically connected to the high-pressure turbine section. The high-pressure turbine section is a chamber configuration and the medium-pressure turbine section is a... | 10/23/2001 |
| 6174132 | Steam-turbine power plant and steam turbine A steam turbine in which principal components to be exposed to high temperatures are all made of ferritic steel, whereby the temperatures of main steam and reheat steam can be increased to 610-660 (° C.). The rotor shaft (23 in FIG. 1) of the steam turbi... | 01/16/2001 |
| 6162013 | Steam turbine An arrangement to regulate the flow of steam extracted intermediately from a steam turbine and to induce a steam flow, between separate turbine parts, in a direction that is essentially axial with respect to the rotational direction of the turbine rotor. ... | 12/19/2000 |
| 6102654 | Turbomachine and method for cooling a turbomachine A turbomachine, especially a steam turbine, includes a casing, an inflow region formed at least in part by the casing for guiding working fluid, a feed for a cooling fluid, a rotating-blade carrier disposed in the casing and extending along a principal ax... | 08/15/2000 |
| 6077033 | Portable air-blowing working machine A portable air-blowing working machine includes a prime mover and an air-blowing system. The air-blowing system incorporates first-stage and second-stage centrifugal air-blowing sections, which are rotatably driven by an output shaft of the prime mover an... | 06/20/2000 |
| 6004093 | Portable air-blowing working machine A portable air-blowing working machine includes a prime mover and an air-blowing system. The air-blowing system incorporates first-stage and second-stage centrifugal air-blowing sections, which are rotatably driven by an output shaft of a prime mover and ... | 12/21/1999 |
| 5246336 | Motor driven complex pump apparatus An electric motor includes a pump leg on the driving side thereof, and a bracket, a flange, discharge joints, extension tubes and a volute chamber cover are integrated into the pump leg 6. The extension tubes are arranged opposite to each other at the pos... | 09/21/1993 |
| 4893986 | High-pressure high-temperature coal slurry centrifugal pump and let-down turbine A two-stage, high-pressure centrifugal pump comprises a pump housing and at least one pair of external inlets and outlets for charging and discharging each stage of the pump. The inlets and outlets are located through the periphery of the pump for allowin... | 01/16/1990 |
| 4725196 | Single-shaft multi-stage centrifugal compressor A single-shaft multi-stage centrifugal compressor has a multiplicity of impellers for compressing a main gas and an impeller for compressing an intermediate suction gas which are carried by the same impeller shaft. The suction pressure of the impeller con... | 02/16/1988 |
| 4655681 | Seal-less pump A multi-stage metallic pump or chemical pump with plural impellers arranged in series. The impeller of the 1st-stage is integrally provided with radial flow ribs on the under surface of the impeller and with backside radial ribs on the upper surface of th... | 04/07/1987 |
| 4121839 | Sealing system for use in composite multi-stage pump A sealing system for use in a composite multi-stage pump or pumps is disclosed which utilizes part of the liquid pressurized by the pump to moderate sealing conditions by introducing said liquid to a portion or portions around the shaft, where the sealing... | 10/24/1978 |
| 4083647 | Seal means for a centrifugal pump A pump for handling liquids laden with abrasive particles in which the seal of the shaft between the low- and high-pressure stages comprises at least two floating rings provided on the shaft in a circular gap between the shaft and the casing. The casing h... | 04/11/1978 |
| 3969039 | Vacuum pump An integral vacuum pump for producing ultra-high vacuums including, in combination, axial turbomolecular, centrifugal compressor and vortex diode pumping means.... | 07/13/1976 |
