| 摘要 |
A device for the manual metering of a medical fluid, such as a hardening resin of the bone cement type, comprises a chamber for the fluid to be metered ( 2, 102 ) with an end opening ( 6 ), a gripping handle ( 7, 107 ), a piston ( 10, 110 ) which is housed in the chamber ( 2, 102 ) and provided with an operating member ( 12 ) for a user, and screw-type actuating means ( 13 ) arranged in between the operating member ( 12 ) and the piston ( 10 ) so as to perform the longitudinal movement thereof and pressurise the fluid to be metered. The screw means ( 13 ) may be modified so as to change from an operative configuration, where the piston is fed micrometrically, to an inoperative configuration, where the piston may move freely. The screw means ( 13 ) comprise an outer thread ( 14, 114 ) associated with the piston ( 10 ) and a female-thread element ( 15, 115 ) formed integrally on the handle ( 7, 107 ); the handle may be deformed elastically by means of transverse compression so as to change the screw means ( 13 ) from their operative configuration to their inoperative configuration. |
