Invention Grant
- Patent Title: Axe
- Patent Title (中): 斧头
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Application No.: US13265632Application Date: 2010-04-23
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Publication No.: US08925207B2Publication Date: 2015-01-06
- Inventor: Heikki Kärnä
- Applicant: Heikki Kärnä
- Agency: Piedmont Intellectual Property
- Priority: FI20095455 20090424
- International Application: PCT/FI2010/050334 WO 20100423
- International Announcement: WO2010/122230 WO 20101028
- Main IPC: B26B23/00
- IPC: B26B23/00 ; B25G3/02

Abstract:
An axe comprising a blade (3) provided with a cutting edge (6) at one end, and a handle (2), and in which the center of gravity of the axe is located at a distance from the cutting edge (6) of the axe and lies in a center-of-gravity plane (C) of the axe located at a distance from a blade plane (B) of the axe parallel with both the center-of-gravity plane (C) and a normal working motion plane (W) of the axe, and in which the cutting edge (6) of the blade and the center of gravity of the axe are arranged to cooperate when the blade (3) hits wood and the cutting edge (6) of the blade partly penetrates into the wood such that at least some of the impact force of the blade (3) is converted into a rotational motion and a motion of the blade (3) in a curvilinear trajectory, the blade (3) is attached to the handle (2) so that the handle (2) is uncircled by the blade (3).
Public/Granted literature
- US20120036723A1 Axe Public/Granted day:2012-02-16
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