发明名称 |
Combination ladder and hand truck |
摘要 |
A combination foldable ladder and hand truck is disclosed comprising a plurality of ladder sections joined at respective ends by hinges and having retractable transport wheels and a retractable support means. The device is functional as a step ladder as well as an extension ladder in an open position with the support means and transport wheels each in their retracted positions. The device is functional as a hand truck in a closed position with the support means in an extended forward position for supporting goods and the transport wheels in an extended downward position, for rolling.
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申请公布号 |
US4934485(A) |
申请公布日期 |
1990.06.19 |
申请号 |
US19880153739 |
申请日期 |
1988.02.08 |
申请人 |
PEASE, ROBERT;FEESER, KENNETH |
发明人 |
PURKAPILE, EMERSON J. |
分类号 |
E06C1/00;E06C1/397 |
主分类号 |
E06C1/00 |
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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