초록 ▼

A flexible self-supporting plastic core 10 has an outer protective hose 12. The core is made up of a number of back-to-back male members 13 and back-to-back female members 14 and has two end connectors 15 and 16. The members 13 and 14 fit end to end to form fluid-tight ball and socket universally ro

A flexible self-supporting plastic core 10 has an outer protective hose 12. The core is made up of a number of back-to-back male members 13 and back-to-back female members 14 and has two end connectors 15 and 16. The members 13 and 14 fit end to end to form fluid-tight ball and socket universally rotatable joints therebetween.

대표청구항 ▼

[ I claim:] [1.] A flexible self-supporting plastic vacuum cleaner core comprising: a plurality of first and second members resiliently inter-engaged alternatively end to end along a length of the core to form universally rotatable fluid tight joints between adjacent members,the first members each i

[ I claim:] [1.] A flexible self-supporting plastic vacuum cleaner core comprising: a plurality of first and second members resiliently inter-engaged alternatively end to end along a length of the core to form universally rotatable fluid tight joints between adjacent members,the first members each including a uniform cross-sectioned central cylindrical tubular member having first and second ends, each of the first and second ends being integrally formed with a first connection member having a part spherical male outer surface, the central cylindrical tubular member having a smaller outer diameter than the outer diameter of the part spherical outer member, andthe second members each including a uniform cross-sectioned central cylindrical tubular member having a constant wall thickness and first and second ends, each of the first and second ends being integrally formed with a second connection member having a part spherical female inner surface, the central cylindrical tubular member having a smaller outer diameter than the outer diameter of the part spherical outer member, the first and second members being snap-fit together with the first connection members engaged inside respective second connection members to form the fluid tight joints.