| 摘要 |
<p>A manually operable spray pump with a double-action pump and a detachable fluid reservoir (18). A pump cylinder (12) has valves (58A, 58B) at each end to admit air into one of two pump chambers (12A, 12B) formed by a piston (22) and means to simultaneously force air from the other chamber down a shaft (20) and out over a fluid discharge orifice (79), thereby pulling fluid from the reservoir (18) and spraying it from the fluid spray device (10).</p> |
