Method of manfacturing a foldable ladder structure
    3.
    发明授权
    Method of manfacturing a foldable ladder structure 失效
    制作可折叠梯子结构的方法

    公开(公告)号:US5005280A

    公开(公告)日:1991-04-09

    申请号:US436965

    申请日:1989-11-15

    IPC分类号: E06C1/16 E06C7/08

    摘要: A method of making foldable ladder structure wherein plastic material is injected and expanded in molds to form several parts of a foldable ladder which includes front and rear ladder sections that can be pivotally hinged at their upper portions, a collapsible shelf and spreader linkage to allow the sections to be relatively pivoted from collapsed face-to-face relation to erected position.

    摘要翻译: 一种制造可折叠梯形结构的方法,其中塑料材料在模具中注射和膨胀以形成可折叠梯子的几个部分,其包括可以在其上部枢转地铰接的前后梯部分,可折叠货架和吊架连杆, 部分相对于从折叠的面对面关系枢转到竖立位置。

    Ladder leg extender and leveler
    4.
    发明授权
    Ladder leg extender and leveler 失效
    梯腿延长器和矫直机

    公开(公告)号:US4766976A

    公开(公告)日:1988-08-30

    申请号:US90754

    申请日:1987-08-28

    IPC分类号: E06C7/44

    CPC分类号: E06C7/44

    摘要: An improved ladder leg extender and leveler assembly including a frame structure which can be fixed in flush face-to-face relation to a ladder leg side so as to straddle rung fastener protrusions on the ladder leg side, thus avoiding bending stresses, the arrangement permitting quick and efficient assembly.

    摘要翻译: 一种改进的梯腿延伸器和矫平器组件,包括框架结构,该框架结构可以与梯腿侧面相对地固定,以便跨越梯腿侧的梯形紧固件突起,从而避免弯曲应力,该布置允许 快速高效的装配。

    Foldable ladder structure and method of manufacturing the same
    5.
    发明授权
    Foldable ladder structure and method of manufacturing the same 失效
    梯形梯形结构及其制造方法

    公开(公告)号:US4834216A

    公开(公告)日:1989-05-30

    申请号:US3613

    申请日:1987-01-15

    IPC分类号: E06C1/16 E06C7/08

    CPC分类号: E06C7/08 E06C1/16

    摘要: Foldable ladder structure and method of making the same wherein plastic material is injected and expanded in molds to form several parts of a foldable ladder which includes front and rear ladder sections that can be pivotally hinged at their upper portions, a collapsible shelf and spreader linkage to allow the sections to be relatively pivoted from collapsed face-to-face relation to erected position.

    摘要翻译: 可折叠的梯子结构及其制造方法,其中塑料材料在模具中注射和膨胀以形成可折叠梯子的几个部分,其包括可以在其上部枢转地铰接的前后梯部分,可折叠货架和吊架连杆 允许这些部分从折叠的面对面关系相对枢转到竖立位置。

    Rung lock and latch assembly for an extension ladder
    7.
    发明授权
    Rung lock and latch assembly for an extension ladder 失效
    用于延伸梯的梯形锁和闩锁组件

    公开(公告)号:US5429207A

    公开(公告)日:1995-07-04

    申请号:US197745

    申请日:1994-02-17

    IPC分类号: E06C1/12 E06C7/06

    CPC分类号: E06C7/06 E06C1/12

    摘要: A rung lock frame and a mechanical latching structural assembly for selectively releasably locking and releasably and augmentally latching a pair of adjacently positioned rungs of relatively slidable ladder sections of an extension ladder, the rung lock frame and latching structure including guide rib and inclined ramp arrangement to permit ready movement of said latching structure into and out of augmental latching position on the rung lock frame.

    摘要翻译: 梯形锁定框架和机械闩锁结构组件,用于选择性地可释放地锁定和可释放地并且增大地锁定延伸梯的相对可滑动的梯形部分的一对相邻定位的梯级,所述梯级锁定框架和闩锁结构包括引导肋和倾斜斜坡布置, 允许所述闩锁结构准备移动到梯形锁定框架上的伸出闩锁位置和从其移出。

    Rung lock assembly for an extension ladder
    8.
    发明授权
    Rung lock assembly for an extension ladder 失效
    用于延伸梯的梯形锁组件

    公开(公告)号:US5117943A

    公开(公告)日:1992-06-02

    申请号:US765568

    申请日:1991-09-25

    IPC分类号: E06C1/12 E06C7/06

    CPC分类号: E06C7/06 E06C1/12

    摘要: A rung lock assembly for selectively and releasably locking a pair of adjacent rungs of relatively slidable fly ladder and base ladder sections of an extensible ladder including a rung lock frame pivotally mounted within the fly ladder section to be normally urged into engagement with adjacent rungs of the ladder sections and a pulley and cable system cooperative with the rung lock frame to release and move the same away from such engagement for relative slidable movement of the ladder sections.

    摘要翻译: 梯形锁组件,用于选择性地和可释放地锁定可延伸梯子的相对滑动的飞梯和基本梯形梯子的一对相邻梯级,其包括枢转地安装在飞梯部分内的梯形锁定框架,以通常被推动与相邻梯级的梯级 梯子部分和与梯形锁定框架协作的滑轮和电缆系统以释放并将其移动离开这种接合以使梯形部分的相对可滑动运动。