Double feed pump, in particular for windshield washer systems in motor vehicles
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United States of America Patent
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-
Feb 16, 1993
Grant Date -
N/A
app pub date -
Jan 31, 1991
filing date -
Apr 29, 1989
priority date (Note) -
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Abstract
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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