Manual sprayer device with a piston-controlled compensation valve
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United States of America Patent
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Sep 14, 1993
Issued Date -
N/A
app pub date -
Jul 14, 1992
filing date -
Aug 30, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The sprayer device comprises a trigger lever (44) which operates a piston (40) movable within a cylinder (20). The piston (40) comprises an intermediate sunken portion or groove (42) which cooperates with a compensation valve (18) to enable it to close when the piston (40) is substantially at the end of its suction stroke, i.e. in its rest position. During the course of its movement, the piston (40) opens the compensation valve (18).
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