| 摘要 |
PCT No. PCT/DE88/00599 Sec. 371 Date May 29, 1990 Sec. 102(e) Date May 29, 1990 PCT Filed Sep. 30, 1988 PCT Pub. No. WO90/03521 PCT Pub. Date Apr. 5, 1990.An eccentric screw pump comprises at least one stator, a rotor having a core and received for eccentric rotation in the stator, a first coupling device adapted to connect one end of the rotor to a drive system, a second coupling device provided at another end of the rotor, the coupling devices having external dimensions which are smaller than a diameter of the core of the rotor.
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