Liquid atmospheric polluter e.g. liquid manure, reservoir covering device, has sensors for detecting respective positions of dome to control air generator device, at activated state, for inflating and deflating air chamber of pusher unit

摘要

The device has a sensor (10) for detecting the lower position of a dome to trigger the functioning of an air generator device (5), at an activated state, during a preset period for inflating an air chamber of a pusher unit. A sensor (11) detects the upper position of the dome to control stopping of the device (5) at the activated state for deflating the chamber. The shape of the dome results from changes in the level in a reservoir. An independent claim is also included for an air generator device.