| 摘要 |
1484694 Portable drills; grinding MABUCHI MOTOR KK 27 Aug 1974 [28 Aug 1973] 37489/74 Headings B3C and B3D] An electric hand tool, e.g. for drilling and grinding, comprises a body case 1 enclosing a motor 3 which drives an epicyclic reduction gear 12, 13, 14, a chuck arrangement 19, 20 connected to an output shaft 15 of the reduction gear, and a holder case 2 containing re-chargeable nickel cadmium cells 4 for driving the motor 3. The motor is switched on by rotating the holder case 2 relative to the body case 1. Each of the cells 4 has a relief valve for releasing gas in the event of overcharging of the cells. |
