Invention Grant
- Patent Title: Handheld power tool
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Application No.: US15105199Application Date: 2014-12-09
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Publication No.: US10391621B2Publication Date: 2019-08-27
- Inventor: Aaron Wiedner , Thomas Hofbrucker , Eduard Pfeiffer , Markus Hartmann
- Applicant: Hilti Aktiengesellschaft
- Applicant Address: LI Schaan
- Assignee: Hilti Aktiengesellschaft
- Current Assignee: Hilti Aktiengesellschaft
- Current Assignee Address: LI Schaan
- Agency: Davidson, Davidson & Kappel, LLC
- Priority: EP13197954 20131218
- International Application: PCT/EP2014/077058 WO 20141209
- International Announcement: WO2015/091112 WO 20150625
- Main IPC: B25D17/06
- IPC: B25D17/06 ; B25D17/24 ; B25D16/00

Abstract:
The handheld power tool has a tool receptacle for accommodating a tool on a working axis (11) and an electric motor (5). A pneumatic percussion mechanism (6) has an exciter, which is moved back-and-forth by the motor (5) periodically in parallel to the working axis (11), a striker (14), which is movable on the working axis (11) and is coupled via a pneumatic spring (18) to the exciter, and an anvil (19), which is situated movably on the working axis (11) and is situated downstream from the striker (14) in the percussion direction (12). The anvil (19) has a cylindrical anvil section (22) having a diameter and multiple channels (30) extending over the entire length (31) of the anvil section (22). A cross-sectional area of the anvil section (22) is at most 5% less than a circular area defined by the diameter.
Public/Granted literature
- US20160311103A1 HANDHELD POWER TOOL Public/Granted day:2016-10-27
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