Umbrella tip cup |
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| 申请号 | US47946674 | 申请日 | 1974-06-14 | 公开(公告)号 | US3882880A | 公开(公告)日 | 1975-05-13 |
| 申请人 | HAAS JORDAN COMPANY; | 发明人 | WALTZ H FRANKLIN; | ||||
| 摘要 | An improved umbrella rib tip cup and guide sleeve are disclosed. The tip cup has an inner bore defining an annular surface positioned to slide axially along the guide sleeve, which in turn fits over the umbrella pole adjacent the handle. On the inner surface of the sleeve and in contact with the pole are a series of longitudinal spacer ribs, and on the outside of the sleeve circumferentially spaced from the inner ribs are a series of longitudinally extending ribs which define an interference fit with the inner annulus of the tip cup. The peripheral spacing of the inner and outer sleeve ribs and the interference fit between the tip cup and the outer sleeve ribs cause the sleeve to act as a deformable spring in resilient engagement with the tip cup, providing an easily slidable tip cup which locks in either open or closed position and does not tend to cant or jam during operation. | ||||||
| 权利要求 | 1. In an umbrella having a central pole, collapsible over material and a plurality of support ribs depending from the upper part of the pole, such support ribs having tips at their lower ends which, in the closed configuration of the umbrella, conjoin together about the pole, the improvement comprising an annular tip cup and an annular cup-supporting sleeve concentrically positioned on the pole adjacent the rib tips, said tip cup having an outer tip-engaging annular flange and a central bore defining an inner annulus, said support sleeve having means superimposed on its outer surface for slidably receiving the inner annulus of said tip cup in an interference fit when said tip cup is moved axially upward in concentric relationship over said support sleeve to engage the rib tips, and spacer means on its inner surface, peripherally spaced from said superimposed outer sleeve means, for engaging the pole and maintaining a spacing between the pole and the inner annulus of the sleeve when said tip cup is received by said superimposed outer sleeve means in such interference fit, whereby upon receiving said tip cup, said support sleeve is deflected by inward pressure on said superimposed outer surface means and exerts an outward pressure on the inner annulus of said tip cup. 2. The umbrella apparatus of claim 1 wherein said spacer means on the inner surface of said sleeve comprises longitudinally extending ribs on said surface positioned for contact with the pole. 3. The umbrella apparatus of claim 2 wherein said longitudinal ribs extend approXimately from the lower end of said sleeve to a position short of the upper end of said sleeve, whereby said inner annulus of said tip cup, when moved axially upward along said support sleeve to a position beyond the ends of said longitudinal ribs, tends to offer resistance against downward movement from such position. 4. The umbrella apparatus of claim 1 wherein the inner annulus of said cup comprises a cylindrical surface generally parallel and concentric with said support sleeve. 5. The umbrella apparatus of claim 1 wherein said outer sleeve means comprises a plurality of longitudinally extending ribs on said outer surface. 6. The umbrella apparatus of claim 5 wherein said outer surface ribs extend from approximately the upper end of said support sleeve to a position short of the lower end of said support sleeve. |
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