Electric work machine
US11476735B2 · kind B2 · utility
0Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Sep 10, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric work machine with a product structure that effectively reduces noise caused by a brushless motor without changing the motor specifications. A hammer drill includes a brushless motor including a stator including an insulator, a cylindrical stator core, and a coil wound around the stator core via the insulator, and a rotor rotatable relative to the stator, a cylindrical member fixed along an entire outer circumference of the stator core and made of material with a Young's modulus higher than a Young's modulus of the insulator, and a housing accommodating the brushless motor and the cylindrical member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.