HVAC fire damper tool
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United States of America Patent
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Aug 15, 2017
Issued Date -
N/A
app pub date -
Jul 1, 2013
filing date -
Jul 30, 2012
priority date (Note) -
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Abstract
A fire damper tool is provided for assisting a user opening the shutters of an HVAC fire damper after the shutters have closed. The device comprises a scissor tool that is hand-driven for separating the closed shutters without requiring the user to exert force on the doors while opening. The tool comprises a first and second set of scissor arms connected to a common pin. A threaded rod connects the proximal ends of the scissor arms along one side of the pin, while the distal ends of the scissor arms are positioned between the closed fire damper doors. A hand driven nut draws the proximal ends of the scissor arms together, causing the proximal ends thereof to spread, and in turn spread the fire damper doors. The tool is useful for confined areas where mechanical advantage is necessary for separating items, and is particularly suited for commercial HVAC applications.
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