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:
Apr. 17, 1990
Filed:
May. 23, 1988
Robert Van Houten, Winchester, MA (US);
Airflow Research and Manufacturing Corporation, Watertown, MA (US);
Abstract
A centrifugal blower with rearwardly curved impeller blades positioned in a housing between two housing faces that are spaced apart along the impeller axis. One of the housing faces defines a housing inlet. The housing is substantially closed off with the exception of the inlet and an outlet. The blower is generally characterized in that the: (a) clearance between the impeller blades and at least one of the housing faces is greater than 30% of the impeller blade depth; (b) the impeller diameter is at least 70% of the housing dimension along that diameter; and (c) area of the blower outlet is greater than 70% of the area of a section of the housing taken perpendicular to the direction of airflow along the impeller axis.