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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0442845 (1974-02-15) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 19 인용 특허 : 0 |
An extendible tower is disclosed and includes a plurality of nestable tower sections that may be raised from a telescoping, nested position to an extended position and support a load thereat. A plurality of inverted hydraulic cylinders are located within the tower sections and are also nestable in a
An extendible tower structure comprising: a. a base; b. a hydraulic fluid reservoir secured to said base; c. a plurality of nestable tower sections received on said base, a largest of said sections being secured to said base, each adjacent section having means received thereon to engage and raise th
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