Pump for use as infusion pump, has delivery bolt or piston supported in housing in movable manner, and drive unit for driving delivery bolt or piston, where movement of delivery bolt or piston is limited by upper and lower end stops

摘要

The pump has a substrate tube discharged in a bridging device, and a bridging tube coming out from the bridging device. A delivery bolt or piston works together with a pump unit (19) in a coupled condition and supported in a pump housing (17) in a movable manner. A drive unit consisting of a memory alloy is provided for driving the delivery bolt or piston, where the movement of the delivery bolt or piston is limited by upper and lower end stops (9, 10). The drive unit has a steel pressure spring (13) that is directly connected with a metal wire.