Torsion spring and a fastener driving tool with the same
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United States of America Patent
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Mar 16, 2021
Grant Date -
Nov 7, 2019
app pub date -
Jul 26, 2018
filing date -
May 4, 2018
priority date (Note) -
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Abstract
A fastener driving tool includes a housing, a striking member, an energy storing unit and a handle unit. The energy storing unit has a torsion spring which has weighted and driving legs extending from two ends of a coil. The driving leg is biased against and engaged with the weighted leg to be preloaded with a downward potential energy that urges a downward movement of the torsion spring and the striking member. The handle unit includes a handle and an anchoring member removably engaged with the striking member. When the handle is pivotally moved from a ready position to a striking position, the weighted leg is moved downwardly and the anchoring member and the striking member are moved upwardly to gradually increase a loading of the torsion spring for the striking member.
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