Chain saw
US9044875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2013 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jul 7, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27B17/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.