Patent Number: 7,784,184

Title: Involute foil regenerator method

Abstract: A regenerator having a plurality of involute foils disposed in an annular gap between an inner cylindrical tube and an outer cylindrical tube. The involute shape of the foils provides uniform spacing throughout the entire regenerator and substantial surface area for fluid contact.

Inventors: Berchowitz; David M. (Athens, OH), Lane; Neill (Athens, OH), Cale; Todd (Coolville, OH), Wood; James Gary (Albany, OH)

Assignee: Sunpower, Inc.

International Classification: B23P 15/26 (20060101)

Expiration Date: 8/31/12018