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특허 상세정보

Entryway protective collar

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B65D-090/10    B65D-090/20   
출원번호 US-0684317 (2012-11-23)
등록번호 US-10214345 (2019-02-26)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Papalas PLLC
인용정보 피인용 횟수 : 0  인용 특허 : 95
초록

Embodiments of the invention are directed to a protective collar that covers the edges of a manhole or other personnel entryway. One device comprises at least two pieces and a hinge that connects the two pieces, which allows the device to be folded for storage. Another device includes a skirt portion that extends further into the manhole. A further device includes at least one light to provide light into the manhole. A still further device includes a surface port that provides a connecting point for a line, and a subsurface port that provides a connectin...

대표
청구항

1. A device comprising: a first portion that has a diameter that is larger than that of a manhole and covers a surface that is adjacent to the manhole;a second portion that has a diameter that is smaller than that of the manhole and extends into the opening of the manhole;a third portion that connects the first portion and the second portion; andan opening that is formed by the first portion, the second portion, and the third portion;wherein in operation, the device is removably placed about a manhole with the first portion extending around the manhole, ...

이 특허에 인용된 특허 (95)

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