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특허 상세정보

MyON담기
내보내기 페이스북 공유 카카오톡 공유

Device for electrically detecting a liquid level

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G08B-021/00    G01F-023/00   
미국특허분류(USC) 340/622 ; 73/295
출원번호 US-0098298 (1979-11-28)
우선권정보 JP-0147252 (1978-11-30)
발명자 / 주소
  • Matsuoka Michihiro (Sunto JPX) Ohba Yasumasa (Numazu JPX)
출원인 / 주소
  • Kokusan Denki Co., Ltd. (Numazu JPX 03)
인용정보 피인용 횟수 : 91  인용 특허 : 0
초록
▼

This invention generally pertains to a device for electrically detecting a liquid level such as water, oil and so on, which is suitably used for an automatic operating apparatus for a pump, or for a liquid level warning device. The device of the invention comprises an electric heater disposed flush with a liquid level to be detected, a heater temperature detector to electrically detect a heater temperature to generate a heater temperature signal, and an environment temperature detector to electrically detect an environment temperature to generate an envi...

대표
청구항
▼

A device for electrically detecting a liquid level comprising: an electrical heater disposed flush with a liquid level to be detected; a heater temperature detector to electrically detect a temperature of said electrical heater to generate a heater temperature signal; an environment temperature detector to electrically detect an environment temperature to generate an environment temperature signal; a first reference signal generator to generate a first reference signal depending on the range of the environment temperatures at which said liquid level is t...

이 특허를 인용한 특허 (91)

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