发明名称 Portable swimming pool step device
摘要 A portable, foldable swimming pool step device includes a pair of sectional stiles interconnected by transverse steps and provided with sectional handrail structures. The stiles, steps, and handrail structures are formed of a thermoplastic material. Each stile includes a pair of sections hingedly connected together and foldable between an extended operative position and a folded position. The steps are adjustable to permit the swimming pool step device to function as an inclined ramp. Suitable rollers are mounted on the stiles to permit easy movement of the swimming pool step device when the ladder is in the folded position.
申请公布号 US4848515(A) 申请公布日期 1989.07.18
申请号 US19880262577 申请日期 1988.10.26
申请人 SURE-STEP, INC. 发明人 RINKE, ROBERT M.
分类号 E04F11/00;E04H4/14;E06C1/387 主分类号 E04F11/00
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