发明名称 Safety switching device for an electromotive garden appliance
摘要 PCT No. PCT/EP96/03373 Sec. 371 Date May 19, 1998 Sec. 102(e) Date May 19, 1998 PCT Filed Jul. 31, 1996 PCT Pub. No. WO97/04635 PCT Pub. Date Feb. 13, 1997In an electromotively driven garden appliance, for example a lawnmower or a lawn-aerator, the on-off switch is usually arranged on the handle-bar such that it can easily be accessed for operation. This on-off switch is connected via a cable to the motor circuit, the cable being guided along one branch of the handle-bar. According to the invention, in order to avoid damage to the cable and resultant unreliable contact-making when the handle-bar is folded down, the cable is replaced by a wireless connection, in particular by infrared radiation, radio or ultrasound. For this purpose, a transmitter is assigned to the electrical on-off switch and a receiver on the chassis is assigned to the motor circuit. The wireless transmission according to the invention can easily be combined with the dead man's switch which is prescribed for garden appliances and can take the form of a proximity switch or touch-contact switch and may be arranged on the handle-bar such that the appliance is switched off when the handle-bar is released.
申请公布号 US6124791(A) 申请公布日期 2000.09.26
申请号 US19980011350 申请日期 1998.05.19
申请人 WOLF-GERAETE GMBH VERTRIEBSGESELLSCHAFT KG 发明人 WOLF, GREGOR
分类号 A01D34/68;(IPC1-7):G08B1/08 主分类号 A01D34/68
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