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. 28, 2025
Filed:
Mar. 14, 2019
Beth-el Zikhron Yaaqov Industries Ltd., Zikhron Yaaqov, IL;
Samuel Koeger, Zikhron Yaaqov, IL;
Jonathan Schneider, Zikhron Yaaqov, IL;
BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD., Zikhron Yaaqov, IL;
Abstract
A near ceiling mounted NBC filtration system of collective protection shelters comprising a filter unit, a blower, and an air exchange backup unit [] (FIG.). The air exchange backup unit [] comprising: a plurality of hinged segments [] serially linked to each other to form a foldable arm. The hinged segments [] are configured for transmission of rotational motion between each other. At least one of the hinged segments comprises at least one stage of a first speed increasing transmission. A first end [] of the air exchange backup unit is swiveably attached to an electric motor [] driving a blower []. And a second end [] of the air exchange backup unit carries a detachable hand crank []. Manual rotation of the hand crank [] rotates a shaft of the electric motor [] at substantially a rated speed of the electric motor. The second end [] of the air exchange backup unit is firmly attachable to a wall of the protection shelter at a convenient position for manual cranking of the hand crank []. The air exchange backup unit [] is selectively folded up at normal times.