发明名称 |
Apparatus for obtaining substantially equal steplength of each jack in a group of pressure fluid operated climbing jacks |
摘要 |
An apparatus for obtaining substantially equal step length of each jack in a group of pressure fluid operated climbing jacks working on a common object for lifting or lowering it. The apparatus comprises at least one compensation jack associated with each climbing jack. The compensation jacks are arranged to transfer substantially the same load as the respective associated climbing jack and to be actuated when the climbing jack has carried out a full stroke without reaching the intended step length, in order thereby to effect a complementary movement of the load.
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申请公布号 |
US4049237(A) |
申请公布日期 |
1977.09.20 |
申请号 |
US19760743254 |
申请日期 |
1976.11.19 |
申请人 |
PAUL ANDERSON INDUSTRIER AB |
发明人 |
MATTSON, ARNE |
分类号 |
E02B17/08;(IPC1-7):B66F1/00 |
主分类号 |
E02B17/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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