Tilting mechanism for chairs |
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| 申请号 | US39483073 | 申请日 | 1973-09-06 | 公开(公告)号 | US3806193A | 公开(公告)日 | 1974-04-23 |
| 申请人 | STEELCASE INC; | 发明人 | FAIKS F; | ||||
| 摘要 | A movement device including a rigid inner supporting rod-like member of a closed circuit configuration and a flexible, closed sleeve slidably mounted on the rod-like support member. In one application of the invention, a drawer or the like can be moved relative to a case or the like by securing the drawer to the sleeve and securing the case to the sleeve at points on opposite sides of a point at which the rod-like support member changes direction. In another application, the device is used as a tilting mechanism for chairs by securing the chair body to the sleeve and securing the chair base to the sleeve at points opposite a point at which the rod-like member changes direction. The chair base can be eliminated by setting the rigid rod-like member directly on the floor. The device also provides a rotatable base for a stool. In another application, the device is used as a bearing between a shaft and a bearing sleeve, the shaft frictionally engaging the flexible sleeve on the inside of the closed circuit and the bearing sleeve frictionally engaging the flexible sleeve on the outside of the closed circuit configuration. In another application, the device is used as a drive pulley by supportably engaging the flexible sleeve by several pulley wheels at two spaced points whereby the rotation of one pulley wheel causes the sleeve to slide on the rigid rodlike member and rotates the other pulley wheels. | ||||||
| 权利要求 | 1. In a chair including a chair body and a base, a tilt support means joining said body to said base comprising: a rigid, generally rod-like support of a generally triangular configuration; a flexible sleeve carried on said support and being slidable thereon; a first mounting bracket joined to said chair body and to said sleeve along a first leg of said triangle; a second mounting bracket joined to said chair body and to said sleeve along a second leg of said triangle; a third mounting bracket joined to said base and to said sleeve along a third leg of said triangle whereby said chair can be tilted fore and aft and simultaneously moved fore and aft with respect to said base by effecting sliding movement of said sleeve on said rigid support. 2. The chair of claim 1 in which said first and second mounting brackets include pivot means whereby said brackets pivot relative to said chair body and thereby allow tilting of said chair body. 3. The device of claim 2 in which said sleeve is noncollapsible whereby binding between said sleeve and said rigid support is minimized. 4. The device of claim 2 in which said sleeve is filled with a lubricating fluid whereby friction between said sleeve and said rigid support is minimized. 5. The device of claim 2 in which bearings are slidably mounted on said rigid support within said sleeve to thereby render said sleeve more freely slidable on said rigid support and minimize the extent to which said sleeve can collapse and bind up on said rigid support. 6. The device of claim 2 in which said sleeve is corrugated in configuration whereby the extent of contact between the inner surface of said sleeve and said rigid support is minimized and whereby pockets are formed for storing lubricating material which may be placed within said sleeve. 7. A chair comprising: a chair body; a rigid, generally rod-like triangular shaped support positioned at either side of said chair body; a flexible sleeve slidably carried on said support; a first mounting bracket for each support being joined to said chair body and to said sleeve along a first leg of said triangular support; a second mounting bracket for each said support being joined to said chair body and to said sleeve along a second leg of said triangular support; a third leg of said triangular support resting on the floor; said first and second mounting brackets including pivotal connections between them and said chair body whereby said chair can be tilted forwardly or rearwardly and moved along the floor in a fore and aft direction by effecting sliding movement of said sleeve on said rigid support. 8. The device of claim 7 in which said sleeve is noncollapsible whereby binding between said sleeve and said rigid support is minimized. 9. The device of claim 7 in which said sleeve is filled with a lubricating fluid whereby friction between said sleeve and said rigid support is minimized. 10. The device of claim 7 in which bearings are slidably mounted on said rigid support within said sleeve to thereby render said sleeve more freely slidable on said rigid support and minimize the extent to which said sleeve can collapse and bind up on said rigid support. 11. The device of claim 7 in which said sleeve is corrugated in configuration whereby the extent of contact between the inner surface of said sleeve and said rigid support is minimized and whereby pockets are formed for storing lubricating material which may be placed within said sleeve. |
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