Washer pump for selectively supplying wash fluid to two areas
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 10, 1999
Grant Date -
N/A
app pub date -
Apr 4, 1997
filing date -
Jan 12, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A washer pump, which adapted to selectively supply wash fluid to one of front and rear windows of an automobile, comprises a valve mechanism. The valve mechanism has two wash fluid conduction pipes communicating with two wash fluid feed pipes in a pump body, two wash fluid delivery pipes, two valve seats provided on respective ends of two wash fluid conduction pipes and facing each other, and a valve body arranged between two valve seats and capable of closing one wash fluid passage at one valve seat on a low pressure side while opening the other wash fluid passage at the other valve seat on a high pressure side. The valve body has two diaphragms including elastically-deforming portions respectively, whereby the center area of one of two elastically-deforming portions acts as one side seal portion engageable with one valve seat and the center area of the other of two elastically-deforming portions acts as the other side seal portion engageable the other valve seat. The opposite sides of the two side seal portions are connected to opposite ends, respectively, of a piston member movable in response to fluid pressure on the diaphragms.
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Family
International Classification(s)
Cited Art Landscape
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