再颁专利
- 专利标题: Electromotive chain saw
- 专利标题(中): 电动链锯
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申请号: US09636652申请日: 2000-08-09
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公开(公告)号: USRE37832E1公开(公告)日: 2002-09-10
- 发明人: Kazuya Nakamura , Makoto Mizutani , Masaki Kondo
- 申请人: Kazuya Nakamura , Makoto Mizutani , Masaki Kondo
- 优先权: JP7-226484 19950904
- 主分类号: B27B1700
- IPC分类号: B27B1700
摘要:
The chain of an electromotive chain saw is quickly stopped by the combined use of an electric brake and a mechanical brake when a trigger member is turned off. The rear end of a brake band disposed to tighten a brake drum by operating a hand guard is secured to a bent rod. When the trigger member is released, the brake band is normally tightened around the outer periphery of a brake drum by the urging force of a coil spring. When the trigger member is released, a circuit provided with a brake winding is closed, thereby applying a dynamic braking force. When the dynamic brake force is applied, a centrifugal clutch is released quickly and the speed of stopping the brake drum is accelerated.