发明授权
- 专利标题： Telescopic mast
- 专利标题（中）： TELESCOPIC MAST
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申请号： US27587972申请日： 1972-07-27
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公开(公告)号： US3818657A公开(公告)日： 1974-06-25
- 发明人: FREI E
- 申请人： KERN AG CONRAD
- 专利权人： Kern Ag Conrad
- 当前专利权人： Kern Ag Conrad
- 优先权： CH1192771 1971-08-13
- 主分类号： E04H12/18
- IPC分类号： E04H12/18 ; E04H12/34
摘要：
A telescopic mast comprising guidingly interfitted tubular elements which can be extended into a terminal position by means of a pressurized medium at which each extended tubular element lockingly engages with and is releasably retained by a holding mechanism provided at a tubular element such extended tubular element retained by such holder mechanism.