| 摘要 |
PCT No. PCT/FR97/00479 Sec. 371 Date Nov. 18, 1997 Sec. 102(e) Date Nov. 18, 1997 PCT Filed Mar. 18, 1997 PCT Pub. No. WO97/36107 PCT Pub. Date Oct. 3, 1997An airtight rotating driving device with eccentricity, especially for volumetric pump, the device including a bent shaft (1) presenting an input axis (5) and an output axis (10) parallel and off-centered in such a way as to carry out an orbital circular movement, and an airtight and non-rotatable sleeve (14) surrounding the shaft and comprising two metallic bellows (19, 20) linked by a guiding ring (21) mounted longitudinally in a sliding relation on the sloped intermediate section (17) of the shaft. The device converts a rotating movement into an orbital circular movement with an absolute airtightness.
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