发明名称 Collapsible display frame
摘要 Apparatus for holding a display panel such as a warning sign is the subject of the present invention. The apparatus is particularly designed for use as a barricade in the vicinity of road construction. The apparatus is constructed of standard plastic tubing and fittings of the type used in the plumbing industry. A break-away construction minimizes damage in the event an object strikes the apparatus and makes repair quick and economical. Four tubular leg supports are arranged in two converging pairs and are each presented by tubular members held together by a standard T-coupling. Standard Y-couplings join the two pairs of leg supports at their point of convergence. First and second transverse tubular members extend between the T-couplings on the respective pairs of legs and each of the transverse members is of a length equal to twice the length of the members which form the legs. This permits the two leg sections to be made by simply dividing a transverse segment into half. A third transverse tubular segment extends between the Y-couplings and is joined to the latter by standard elbow fittings. A flexible line extends through at least two of the leg supports and between the supports through the T-couplings. The two ends of this line are joined to tensioning means such as a coil spring that is disposed in the third transverse tubular segment which spans the distance between the Y-couplings. At least two of the leg supports are removable from the Y-couplings so that they may be moved to a position in folded relationship next to the other two leg supports, and held in this position by the line.
申请公布号 US4232466(A) 申请公布日期 1980.11.11
申请号 US19780969290 申请日期 1978.12.13
申请人 MATHIS, TERRY S. 发明人 MATHIS, TERRY S.
分类号 E01F13/02;(IPC1-7):G09F15/00 主分类号 E01F13/02
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