The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 1990
Filed:
Oct. 17, 1988
David B Wigmore, San Diego, CA (US);
Bradley A Dobbs, San Diego, CA (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A heat exchanger includes a plurality of generally planar spiral flow channels in a stacked, generally parallel array for accommodating a first fluid. Each spiral flow channel terminates in an inner end at an axial core area of the heat exchanger. Flow channels are sandwiched between the spiral flow channels for accommodating a second fluid in heat exchange relationship with the first fluid. Relatively rotatable tubes extend axially of the core area and have radial openings in axial registry with the inner ends of the spiral flow channels. Relative rotation of the tubes vary the overlapping relationship of the tube openings and thereby vary the flow to the spiral flow channels.