| 摘要 |
<p>PURPOSE: To fill up quickly after lower bellows empty out by opening an vent hole and releasing air when sufficient pressure is generated in the lower bellows. CONSTITUTION: In a normal working mode, liquid is successively compressed into lower bellows 16 from upper bellows 12 passing the center 22 by vertically reciprocating motion of the center 22. A valve element 44 is seated on the upper face of a valve element 24 and seals lower flow of liquid passing an air vent 42. When the liquid in the lower chamber 16 applies pressure to the valve element 44 to overcome the force of a spring 46 through the air vent 42, the valve element 44 uprises keeping away from the air vent 42. Due to the uprise of the valve element 44, air inside of the lower bellows 16 escapes passing the air vent 42.</p> |
