| 摘要 |
<p>An oscillatory pump comprising a cylinder (9) having normally-closed valves (10,13) of flexible material fixedly located at the inlet (Ac) and outlet (Bc) ends of the cylinder (9), a piston (1) having an inlet (Ap) and an outlet (Bp), said piston (1) being reciprocatable within the cylinder (9) and provided with a further valve (6) of flexible material movable with the piston (1) and located at the outlet end (Bp) of the piston (1), the piston (1) being constructed such as to allow fluid to pass from an inlet chamber (C1) formed between the inlet valve (10) and the inlet end (Ap) of the piston (1) to an outlet chamber (C2) formed between the further valve (6) and the outlet valve (13) in response to movement of the piston (1) within the cylinder (9) and means (1.2.3) for effecting reciprocatory movement of the piston (1) within the cylinder (9).</p> |
