发明名称 Ladder control apparatus
摘要 A control apparatus for a folding ladder or stairway. The control apparatus comprises a control base attachable to a section of the ladder and a control arm pivotally attached to the control base. The control arm has a distal end which may be gripped by an operator to manipulate the ladder between folded and unfolded positions while the operator is positioned away from the ladder so that unexpected pivotation of ladder sections cannot result in the ladder sections striking the operator. A clamp may be attached to the ladder to retain the distal end of the control arm when not in use. The control arm is telescoping and may be positioned in any of a variety of extended positions. A lock is provided to lock the telescoping control arm at a desired length.
申请公布号 US6662901(B1) 申请公布日期 2003.12.16
申请号 US20000618359 申请日期 2000.07.18
申请人 APPL FRANKLIN J. 发明人 APPL FRANKLIN J.
分类号 E04F11/06;E06C9/10;(IPC1-7):E06C9/00 主分类号 E04F11/06
代理机构 代理人
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