| 摘要 |
PCT No. PCT/NL97/00145 Sec. 371 Date Oct. 15, 1998 Sec. 102(e) Date Oct. 15, 1998 PCT Filed Mar. 20, 1997 PCT Pub. No. WO97/35144 PCT Pub. Date Sep. 25, 1997A setting foot (1) for positioning machines, for example, on a base, comprises two setting members (2, 8) which can be mutually vertically displaced with respect to one another by a screw thread. The upper setting member (8) comprises a spherical surface, along which a bearing plate (17) with a spherical surface can slide. A first flexible sealing ring (21) may be accommodated between the lower (2) and the upper setting member (8), and, in the event of rotation of the upper setting member (8), bridges the spacing between the two setting members (2, 8). As a result, contamination of the screw thread is prevented. A second sealing ring (27) may be positioned along the outer circumference of the bearing plate (17), so that the curved surfaces are protected from the lateral penetration of dirt or moisture. A height indication (23) may be accommodated along the outer circumference of the upper or lower setting member (2, 8), which height indication can be covered by the sealing element (21). A lower O-ring (25) may also be accommodated, in order to prevent the penetration of moisture or dirt along the underside of the setting foot (1). |
