| 摘要 |
<p>Pump (10) of plastic material especially for a rubber dinghy and the like comprising a cylinder (11) with a double-acting alternating piston (13) and a small oblong cylinder (15) alongside the first, closed by heads (24) with packings (26) that also act as valves made with a central annular area containing holes (18, 30) completely covered by an elastic discoid diaphragm (21, 31), the valves (31) of the cylinder (11) communicating with the environment and the valves (19) of the small cylinder communicating with chambers (60, 61) that form at the ends of the cylinder (11) so that, operating the piston (13) by means of an overgear with crank, an electric motor or the propulsor of a rubber dinghy, compressed air is generated and this passing through a centrally situated branch (33) in the cylinder (19), can be supplied to the rubber dinghy or other means requiring it.</p> |
