| 摘要 |
A vacuum cleaner for use in industrial applications to clean debris from areas and/or equipment wherein electrostatic discharge from the vacuum cleaner to the area or equipment would be highly undesirable includes a vacuum cleaner mechanism having a vacuum inlet. A long flexible plastic vacuum hose has one end connected to a vacuum intake. The other end of the vacuum hose is attached to a pickup nozzle. An air valve and control are provided in the pickup nozzle. In accordance with the present invention, a long, continuous, electrically "floating" helical conductor is embedded in the flexible plastic vacuum hose, extending from one end to the other. The helical conductor is ungrounded, and makes no electrical contact to either the vacuum producing mechanism or to the pickup nozzle.
|
