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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0539580 (1990-06-18) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 22 인용 특허 : 0 |
First and second elongated members are slidable along each other to form a beam of variable length to span the top surface of a structure on which a worker is positioned. Clamping surfaces extend from the ends of the beam to engage the sides of the structure. A lever pivotally mounted on the first e
A mounting device for securing a safety line to a structure on which a worker is positioned, comprising: a first elongated member; a second elongated member, substantially coaxial with the first elongated member, having a side portion thereof slidably movable along a side portion of the first elonga
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