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:
Jan. 07, 2003
Filed:
Jun. 15, 2001
Christopher S. Heard, Brookline, NH (US);
Cereva Networks. Inc., Marlborough, MA (US);
Abstract
Impellers are used in the pull tray of a failure tolerant cooling system and are isolated from each other by baffles, so that each impeller has its own exhaust air flow path with an predetermined airflow resistance. The exhaust airflow resistance is sufficiently low that the associated impeller can exhaust enough air to provide sufficient airflow over the components during normal operation. In particular, the airflow is sufficient so that if a fan in the push tray fails, the pressure drop created by the impellers in the pull tray is sufficient to draw air through the space occupied by the failed fan. However, the exhaust airflow resistance for each impeller in the pull tray is sufficiently high that, if an impeller fails, the resistance limits the amount of air that the remaining impellers can pull in through the failed impeller opening, thereby enabling the airflow delivered by the fans in the push tray to continue to be distributed evenly across the components.