发明名称 LIFT APPARATUS FOR RAISING WALL SECTIONS
摘要 Lift apparatus for raising wall sections from a prone position to an upright position comprises at least one lift assembly including a socket-like pivotal base, an upright support having the lower end releasably inserted into the pivotal base adapted to pivot with the base as the wall section is raised, and a movable lift member slidable up the upright support adapted to receive an upper end portion of the wall section and raise with the wall section as lifting forces are applied to the wall section and automatically latch against downward movement as the lifting forces are removed. For raising longer wall sections two or more similar lift assemblies are located at spaced intervals along the wall section and alternately raised in incremental distances until the wall section is upright.
申请公布号 US3727885(A) 申请公布日期 1973.04.17
申请号 USD3727885 申请日期 1971.11.05
申请人 PATTERSON W,US;JONES K,US 发明人 JONES K,US;PATTERSON W,US
分类号 E04G21/16;(IPC1-7):B66F13/00 主分类号 E04G21/16
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