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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0073108 (1987-07-14) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 46 인용 특허 : 0 |
Contractible and extensible ladder of the lazy-tong type for attachment to the underside of a swim/dive platform of a boat or to a deck of a boat. The ladder and the swim/dive platform or deck include coacting means so constructed for positioning the ladder in the contracted position under the swim/
In a swim/dive platform having top and bottom surfaces and a ladder secured to a surface of said platform, the improvement wherein said ladder comprises at least one pair of opposed linkages, each of said pair of linkages including at least first and second elongated link elements, the first link el
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