发明名称 |
Adjustable column system and method |
摘要 |
An apparatus includes an outer rectangular tube and an inner rectangular tube. The inner rectangular tube and the outer rectangular tube are movable in relation to each other. In some versions a gas spring is positioned within the outer rectangular tube and the inner rectangular tube. In some versions, the apparatus further comprises a pair of inner bearing blocks operable to change the coefficient of friction between the inner rectangular tube and the outer rectangular tube. In some versions, the apparatus further comprises an outer bearing block assembly operable to change the coefficient of friction between the outer bearing block assembly and the inner rectangular tube.
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申请公布号 |
US8550433(B2) |
申请公布日期 |
2013.10.08 |
申请号 |
US201113079985 |
申请日期 |
2011.04.05 |
申请人 |
LAMPE JOHN;DIPILLA DOMINIC;JWF TECHNOLOGIES, LLC |
发明人 |
LAMPE JOHN;DIPILLA DOMINIC |
分类号 |
E21D15/44 |
主分类号 |
E21D15/44 |
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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