| 摘要 |
<p>The invention concerns a pump comprising a housing (3); a working chamber (5) located in the housing (3) for delivery of a fluid; a suction channel (6) which is in flow connection with the working chamber (5) for guiding the fluid into the working chamber (5); a valve unit disposed in the suction channel (6), the valve unit comprising a guide body (21), a limiting element (22) which is guided for displacement in the guide body (21) and comprises at least one displacement stop (38) for limitation of displacement, a valve (23) which is movable between an open position and a sealing position for controlling the flow of the fluid into the suction channel (6), wherein the valve (23) is guided for displacement, and a pressure element (24) which presses the limiting element (22) in the direction of the sealing position of the valve (23); as well as a pressure channel which is in flow connection with the working chamber (5) for guiding the fluid out of the working chamber (5).</p> |
