| 摘要 |
PCT No. PCT/EP90/00665 Sec. 371 Date Jan. 31, 1991 Sec. 102(e) Date Jan. 31, 1991 PCT Filed Apr. 25, 1990 PCT Pub. No. WO90/13460 PCT Pub. Date Nov. 15, 1990.A double feed pump has two outlet channels to be selectively acted upon with liquid in accordance with the direction of rotation of a feed element and two movable sealing membranes one each being assigned to an outlet channel and separating a valve chamber into a front compartment with valve seat and into a rear compartment, whereby one front compartment each of one valve chamber and one rear compartment of the other valve chamber are connected by a pressure channel. In order to facilitate the manufacture of the parts the sealing membranes are arranged one beside the other in a parting plane of a two-part housing and in each housing half are positioned, assigned to one sealing membrane, an outlet channel and a front compartment with valve seat, and, assigned to the other sealing membrane, a rear compartment and a pressure channel between the front and rear compartments.
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