Reversible action air pump has a mechanical switching system between inflation and evacuating and with integral non return valve

摘要

The pump has a case (1) enclosing an air control chamber and formed with a valve hole (103). An airflow controller (3) is mounted rotatively in the air control chamber. A control lever (8) is disposed outside the case and is connected to a shaft (35) of the controller (3). The lever is actuated in order to make the controller (3) pivoting between inflating and deflating positions around a rotating axle.