| 摘要 |
1395100 Adjustable telescopic columns; resilient mountings STAAL & STIL A/S 6 March 1973 [12 April 1972] 10862/73 Headings A4J and A4U [Also in Division E2] A vertically adjustable, telescopic column for chairs comprises an outer tube 2 and an inner tube 1 provided at its lower end with a downwardly tapered wedge 3 disposed in the cut away portion of a split sleeve 4 which is disposed in the space between the two tubes such that a downwardly directed load on the inner tube 1 causes the sleeve to be pressed outwardly by the wedge and frictionally engage the outer tube to prevent relative movement between the two tubes. Release of the frictional engagement is effected by downward movement of a rod 7 having secured to one end a pin 5 which passes through diametrically opposed openings in the split sleeve. The telescopic column may be resiliently mounted by a spring 12 disposed in a casing 13 which is pivotally mounted about a vertical axis in a base 14. |
