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US 2007/0175435 A1Published application
Rotary compressor and expander, and rotary engine using the same
AssigneeTurnstile Technology Limited
InventorRichard See
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AssigneeTurnstile Technology Limited
InventorRichard See
Estimating the term…
A rotary device for use with compressible fluids comprises a first rotation element mounted to rotate about a first axis and a casing having a surface enclosing at least a part of the first rotation element. An elongate cavity of varying cross sectional area is defined between a surface of the first rotation element and the casing surface. The rotary device also comprises a number of second rotation elements mounted to rotate about respective second axes. Each second rotation element is mounted to project through the casing surface and cooperate with the first rotation element surface to divide the cavity into adjacent working portions. At least one on the Working portions defines a closed volume for a part of a cycle of the device. As the first and second rotation elements rotate, the volumes of the working portions vary. Each second rotation element comprises a number of projecting portions of varying radius about the respective second axis such that each projecting portion projects through the casing into the cavity by a varying amount to cooperate with the first rotation element surface.
A rotary device for use with compressible fluids, the device comprising:
The device of any one of the preceding claims, wherein the first rotation element surface is a cylindrical surface.
The device of any one of the preceding claims, wherein the device is a rotary compressor or rotary expander, rotation of the first and second rotation elements causing the volume of the working portions of the cavity to reduce or increase during rotation of the first and second rotation elements.
The device of any one of the preceding claims, wherein the first rotation element further comprises at least one passage for fluid inlet and/or fluid outlet.
The device of any one of the preceding claims, wherein the casing further comprises a number of valves, each valve being operative as a fluid inlet or fluid outlet only when adjacent to a working portion of the cavity, and wherein each valve is only adjacent to a working portion of the cavity during a fraction of a cycle of the device.
The device of any one of the preceding claims, wherein the second rotation elements are distributed about the first rotation element, each second rotation element being mounted to rotate about a respective second axis that is perpendicular to the first axis.
The device of any one of the preceding claims, wherein the first rotation element surface and the casing surface further define a seal between working portions of the cavity.
The device of any preceding claim, wherein the part of the cycle of the device during which at least one working portion is a closed volume defined at opposite ends by adjacent second rotation elements includes a part of the cycle during which the working portion experiences compression.
The device of claim 24, wherein the adjacent second rotation elements that define opposite ends of at least one working portion are the same second rotation elements for the parts of the cycle during which the working portion experiences compression and expansion.
Dependencies are inferred from the claim text.