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  Rotary machine and internal combustion engineUSPTO Application #: 20070280844Title: Rotary machine and internal combustion engine Abstract: The rotary displacement device has a rotating piston and a rotating housing that has a fixed vane. The cylindrical rotor is eccentrically placed in relation to its cylindrical housing. The gas and air flow goes through the hollow-centered shaft via channels in the rotor. The sealing grid in the displacement space is improved to minimize the friction and thereby gain power and better efficiency. (end of abstract)
Agent: Fasth Law Offices (rolf Fasth) - Southern Pines, NC, US Inventor: Ake Olofsson USPTO Applicaton #: 20070280844 - Class: 418082000 (USPTO) Related Patent Categories: Rotary Expansible Chamber Devices, Grooved Abutting Cylinder-rotating Member End Surfaces, Groove Communicates With Vane Slot The Patent Description & Claims data below is from USPTO Patent Application 20070280844. Brief Patent Description - Full Patent Description - Patent Application Claims
THE ROTARY MACHINE [0001] The present invention refers to rotary displacement devices with rotating pistons like used in compressors, blowers, air engines and rotary internal combustion engines. This invention is such a device that can be used in the mentioned applications, particularly rotary internal combustion engines, which in the last mentioned application can be compounded of two or more devises according to the present invention of which at least one has the function as a compressor and the other or, whenever applicable, the others has the function of a power unit or expander or expanders, that is to transfer heat energy to kinetic energy. The units work together so the fluid can pass from one to the other. A transmission ensures the housings to rotate. [0002] On the market there are a great number of rotary devices of various principles, one of each with its special advantages and disadvantages. As rotary displacement engine the Wankel engine is one of the most known and the most developed of all. THE OBJECT OF THE INVENTION [0003] Concerning compressors it is only the traditional piston compressor which have the best efficiency compared to other designs, because of the effective sealing arrangement of piston rings. Many rotary designs have failed because of sealing problems. Complex geometries prevent a simple sealing arrangement. For instance it is well known that the Wankel engine has gone through many difficulties to solve their sealing problem. However rotary designs have other advantages as smooth running, light design, and low friction. The present invention also facilitates a simple device. It is an object of the invention to combine the best features of most compressor designs for a wide application. In order to accomplish that, it is therefore an object of the invention to improve the sealing grid in the displacement space and to minimise the friction and thereby gain power and better efficiency. Another object of the invention is, in the application of a rotary combustion engine, to create a simple device with a large possibility of development towards better environment qualities, especially use of hydrogen. [0004] In the use of conventional and other alternative fuels the aim is to develop higher efficiency with preserving the great application area of the conventional piston engine. Inner and Outer Rotor Design [0005] The invention has a cylindrical rotor eccentrically placed in relation to its cylindrical housing characterised in that the mentioned housing also is rotating. The mentioned inner rotor is resting and rolling on the inner wall of the outer housing (contact line) and makes to rotate by a vane fixed on the housing. It is that mentioned housing because of the fixed vane that receive, alternatively in the case of an engine application, give the driving power. The inner rotor is thereby not burdened with any other torque than its own friction. The gas and air flow goes through the hollow-centred shaft via channels in the rotor. That makes the housing be designed without openings or ports for the mentioned flow. The co-rotation reduces the friction substantially. Displacement Variation [0006] The eccentrically mounted rotor forms a variable volume between following surfaces besides lateral walls: 1) the inner surface of the housing, 2) the vane and 3) the outer surface of the rotor. This space has of obvious reasons its largest cross-sectional area diametric opposite the contact line between the rotor and its housing. That causes the volume within mentioned surfaces to change in relation to the vane approaching or removing the contact line. That feature is particularly useful in the mentioned combustion engine, where one or more compressor units and power or expander unit/s can be joined together so it paradoxically creates compression in an expanding volume in the combustion chamber. That is beneficial in the endeavour to approach an isothermal (constant temperature) compression. That can be accomplished by intercooler/s between the units. It explains in detail below. It is also simple to turn the revolving direction of a compressor design for an application as an expander for converting a fluid pressure to a rotating movement, for instance compressed air, or a fluid from an external combustion. Sealing [0007] As the vane 4 is fixed between the lateral walls and towards the housing there is no need of an apex seal or side seals as in the Wankel engine. The rings and the grooves may be designed with a cross cut angel of around 45 degrees in order to seal properly in the corner, that is both against the lateral walls and as close as possible against the inner surface of the housing 1 (contact line). Cooling [0008] The outer rotor has peripheral fins for efficient cooling during rotation. [0009] The central parts of the rotor together with the common shaft and the end of the vane facing the centre of the rotor are in open contact with the open air, which by the fan action caused by the rotation contributes to cool the machine. The vane itself has also air channels for cooling. The gas flow is adjusted by valves. The Internal Combustion Engine. [0010] During the years many alternative combustion engines have appeared to eliminate the disadvantages that conventional reciprocating piston engines are afflicted with. The gas turbine, the Stirling engine and the Wankel engine are some examples of alternative engines being researched upon and still are being invested money on. But these engines have limited application areas where their special advantages can be utilised. The environmental demands are given gradually larger importance and many have stumbled and failed because of other problems, why the reciprocating piston engines still are the dominating engines in the market. [0011] Concerning the application as a rotary internal combustion engine the aim is to make a better combustion process and to facilitate the use of alternative fuels, for instance hydrogen. Furthermore the aim is to essentially increase the efficiency, which indirect affects the environment by lower fuel consumption and lower pollution. Disadvantages of the Reciprocating Piston Engine. 1. Single Volume Process [0012] In contemporary piston engines all the four strokes: intake, compression, combustion and exhaust, take place in one single volume. It can be regarded as preferable to share the strokes with more volumes in order to achieve best efficiency. 2. Crank Gear [0013] The crank gear of the piston engine and thereby the connected piston motion and the inertia of the reciprocating pistons have in several decades been object to brain efforts of inventors and scientists for better solutions. Therefore many suggestions to rotary engines have appeared since many years back. 3. Efficiency Continue reading... Full patent description for Rotary machine and internal combustion engine Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Rotary machine and internal combustion engine patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. 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