Pump for inflating and deflating, has nozzle having first and second holes that respectively communicate with outlet and inlet during inflating mode, and which respectively communicate with inlet and outlet during deflating mode
摘要
<p>A piston (22) reciprocates in a cylinder (10) having an outlet (12) and an inlet (13). A nozzle (30) has a hole (351) that communicates with the outlet and a hole (352) that communicates with the inlet in the inflating mode. The hole (351) communicates with the inlet while the hole (352) communicates with the outlet in the deflating mode.</p>
