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:
Aug. 22, 1989
Filed:
Feb. 16, 1988
Leland C Leber, Fort Collins, CO (US);
Charles L Hunter, Loveland, CO (US);
Teledyne Industries, Inc., Fort Collins, CO (US);
Westvaco Corporation, New York, NY (US);
Abstract
An air flow controller is associated with a cabinet which contains apparatus and components for performing operations or conducting processes. Associated with the cabinet is a housing within which is contained an air filtration material. Air is admitted and propelled for flow through that material and delivery into the confined space defined by the cabinet. The amount of propulsion is controlled in response to the rate of flow of air through the housing in order to maintain a selected rate of flow in compensation for changes in impedence to flow of air through the material. The amount of propulsion also is controlled in response to other parameters, such as pressure differential across the material, pressure differential across a prefilter upstream, a measure of the rate of air flow into the cabinet, ambient temperature within the cabinet, pressure differential between outside atmospheric pressure and each of the housing and the cabinet and relative humidity within the cabinet. Those controlled parameters are continually analyzed with the results being used for control and/or record keeping. Containing the filtration material within the housing is a removable canister within which the material is compartmentalized to define a maze through which air flows. The canister is closed by a shell which also sandwiches a high-efficiency sheet filter located in the air flow path. The components are sealed together, so as to define an air-tight cartridge.