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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0556290 (1990-07-23) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 11 인용 특허 : 0 |
Automatic treatment of a drain system is provided by the controlled injection of a bio-active liquid at established intervals into the drain system. A container of the treatment liquid is provided with a pump coupled between the container and the drain. Fluid level sensing means is located in the co
A method for controlling the treatment of a drain system of the type wherein a treatment fluid is injected by pump from a reservoir into a drain system which comprises the following steps: (a) establishing a periodic operating cycle for the pumping of treatment fluid from the reservoir; (b) sensing
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