Patent ID: 7909583
Filing Date: 2011-03-22
Classification: F04B

Abstract:
1. A pump apparatus comprising: a low-temperature portion having a plurality of low-temperature bodies arranged with intervals in a crossing direction in a pathway of gas; a high-temperature portion having a plurality of high-temperature bodies arranged with intervals in the crossing direction in the pathway; and a heating or cooling device that controls at least one of temperatures of the low-temperature portion or the high-temperature portion so that a temperature of the high-temperature portion is higher than that of the low-temperature portion, wherein: wherein edges of the low-temperature bodies are positioned in vicinity to respective edges of the high-temperature bodies, such that a distance between the edges of the low temperature bodies and the edges of the high-temperature bodies in vicinity to one another in the crossing direction does not exceed either of a distance between adjacent ones of the low-temperature bodies in the crossing direction and a distance between adjacent ones of the high-temperature bodies in the crossing direction; wherein the distance between the edges of the low temperature bodies and the edges of the high temperature bodies is measured in the direction perpendicular to the thermal edge flow direction.