| 摘要 |
PCT No. PCT/FR96/00289 Sec. 371 Date Aug. 25, 1997 Sec. 102(e) Date Aug. 25, 1997 PCT Filed Feb. 23, 1996 PCT Pub. No. WO96/26366 PCT Pub. Date Aug. 29, 1996A vacuum pump with circular translation cycle comprises a stationary body (10) with a stationary disc (13, 14) that includes, at least on one side thereof, a spiral-shaped projection (23, 24, 25), a movable disc (30) facing the stationary one (13, 14) and also including at least one spiral-shaped projection (33, 34, 35) interleaved with the projection (23, 24, 25) of the stationary disc (13, 14) and with the same angular range, a mechanism connecting the movable disc (30) to the body (10) so that it is supported thereby and controlling the circular translational motion of the movable disc (30) in relation to the body (10), and actuating unit (20) for driving the movable disc (30) by a pump shaft (50) that is centrally located in relation to the stationary body (10), the mechanism comprising at least one bearing (47) supported by the pump shaft (50) . The pump also includes a device for limiting undesirable travel in the circular translation of the disc, the device being a metallic bellows (60).
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