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:
Feb. 08, 2000
Filed:
Jul. 07, 1997
Vincent C Biondo, Milford, NJ (US);
Other;
Abstract
A fire responsive, closing air vent includes a main frame enclosing an air flow passageway with a hingeable cover connected to the main frame which can open and close. The frame has a mechanism for biasing the cover towards the closed position and a preformed mass of material, e.g. meltable wax positioned at least in part between the frame and the cover to hold the cover in the open position. The material is at least partially moveable (e.g., shrinkable or meltable) in response to an increase in ambient temperature in excess of 140.degree. F. so as to cease from holding the cover in an open position and permitting the weight to close the cover. In one embodiment, the vent is made up of a flat plate and a subframe for insertion into a building structure and is positioned at right angles to the flat plate. In another embodiment, the main frame of the closing air vent has a plurality of air passageways and the cover is capable of covering all of the air passageways.