Patent ID: 9728699
Date: 2017-08-08
CPC Classifications: B82Y,F04B,H01L,Y10T

Claim:
1. A thermal transpiration device comprising: at least one of a heating means and a cooling means; a first membrane having a first predetermined thickness and being heated or cooled, by the at least one of the heating means and the cooling means, to a first temperature, a first portion of the first membrane having a first reduced thickness that is less than said first predetermined thickness; a second membrane having a second predetermined thickness and being heated or cooled, by the at least one of the heating means and the cooling means, to a second temperature, different from said first temperature of the first membrane, a second portion of the second membrane having a second reduced thickness that is less than said second predetermined thickness, wherein the second portion of the second membrane is opposed to the first portion of the first membrane; and a thermal insulator disposed between said first membrane and said second membrane, said thermal insulator extending from a first end of the first and second membranes to a second end of the first and second membranes,