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Flexible self-regulating heating pad combination and associated method

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H05B-003/34   
미국특허분류(USC) 219/528 ; 219/544 ; 219/549 ; 219/505
출원번호 US-0845222 (1992-03-03)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 97  인용 특허 : 0
초록
▼

A flexible, electric heating pad having a self-limiting heating element is provided. The heating element includes a pair of relatively spaced conductors surrounded by a positive temperature coefficient (PTC) material. A layer of electrically insulating material surrounds the PTC material. The PTC material includes a polyolefin resin having a relatively low flexural modulus. The heating element is disposed in a generally serpentine configuration within passages formed in the covering material of the heating pad. The passages are formed by joining together...

대표
청구항
▼

A flexible heating pad comprising: an elongated self-limiting heating element having two relatively spaced conductors surrounded by positive temperature coefficient material; said positive temperature coefficient material having a density of about 0.928 to 0.958 grams per cubic centimeter and a flexural modulus of about 50,000 to 150,000 psi; a layer of electrically insulating material surrounding said positive temperature coefficient material, a power supply cable having one end electrically connected to one end of each said conductor; connector means o...

이 특허를 인용한 특허 피인용횟수: 97

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