SCROLL FLUID MACHINE
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United States of America Patent
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Feb 23, 2016
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Mar 5, 2015
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Abstract
A scroll fluid machine includes a pair of a fixed scroll (15) and an orbiting scroll (16). The scroll fluid machine has an one-side stepped scroll structure in which a stepped part (16E) is provided only at a predetermined position on a tooth bottom surface (16D) of a involute spiral wrap (16B) of one of the fixed scroll (15) and the orbiting scroll (16) in a spiral direction, and a stepped part (15E) corresponding to the stepped part (16E) on the tooth bottom surface (16D) is provided only at a predetermined position on a tooth top surface (15C) of a involute spiral wrap (15B) of the other scroll in a spiral direction. The stepped part (16E) on the tooth bottom surface (16D) is provided at a position on an inner side of a spiral end position (16F) of the involute spiral wrap (16B) at intake closure by an involute angle of n radians in the spiral direction or at a position on an outer side of the inner-side position.
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