发明授权
- 专利标题: Portable mast for radio link systems
- 专利标题(中): 便携式桅杆用于无线电链路系统
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申请号: US930007申请日: 1978-08-01
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公开(公告)号: US4212015A公开(公告)日: 1980-07-08
- 发明人: Robert Graf , Rene Meier
- 申请人: Robert Graf , Rene Meier
- 申请人地址: CHX Baden
- 专利权人: BBC Brown Boveri & Company Limited
- 当前专利权人: BBC Brown Boveri & Company Limited
- 当前专利权人地址: CHX Baden
- 优先权: CHX9566/77 19770804
- 主分类号: E04H12/34
- IPC分类号: E04H12/34 ; H01Q1/12 ; H01Q1/10
摘要:
A portable radio link system mast, particularly for use in the field, employing mast tube elements which are lifted, one after the other, by means of a lifting device installed in the head of the stand and, after a certain height is reached, are connected with always the next mast tube element. The lifting device consists of three frictionally self-locking pawls arranged on top of each other, a carrying pawl, a lowering pawl and a lifting pawl, which permit a slipless lifting, lowering and locking of the mast tube elements in connection with springs. A cardigan cam lever with a feeler stud draws attention to a wrong connection of the mast tube elements, and a mast tube element in the range of the lifting device can only be pushed out of the head of the stand after a correct contact is established with the following mast tube element.
公开/授权文献
- US5853045A Accumulator-exchanger device 公开/授权日:1998-12-29
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