发明名称 |
Easel |
摘要 |
An easel having a tripod stand each of whose legs are telescopically mounted in tubular sleeves. A traveller unit is mounted on one of the sleeves and it has attached thereto cross brace members whose opposite ends are connected to the other respective sleeves. The traveller unit has a pair of legs extending angularly downwardly from the sides of a platform to form a channel between the legs. A cross member connects the tips of the legs and forms an opening into which a middle sleeve is received and which acts as a guide for the traveller unit as it slides upwardly and downwardly when setting up or collapsing the easel. A pair of pad holder units are attached to the other sleeves and are positionable on the sleeves at an infinite number of heights due to the frictional clamping nature of their structure when a load is supported thereon. Cooperating structure is formed on the sleeves and leg members which allow the length of the legs to be varied by utilizing resiliently biased leaf springs.
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申请公布号 |
US4017049(A) |
申请公布日期 |
1977.04.12 |
申请号 |
US19720255561 |
申请日期 |
1972.05.22 |
申请人 |
Q-PANEL COMPANY |
发明人 |
ALBEE, JR., PERCY FREDERICK |
分类号 |
A47B97/08;(IPC1-7):A47B97/04 |
主分类号 |
A47B97/08 |
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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