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:
Nov. 17, 1987
Filed:
May. 08, 1985
Gordon P Sharp, Newton, MA (US);
William P Curtiss, Winthrop, MA (US);
George B Yundt, Cambridge, MA (US);
Phoenix Controls Corp., Boston, MA (US);
Abstract
A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed motor controller is responsive to the sash position signal to provide a fan speed which varies in a substantially continuous and linear manner as a function of the sash opening. In an alternate embodiment, the air flow through the hood is controlled by a damper or similar device. Several embodiments are shown in which the present invention may be used to control a fume hood system in which a blower exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.