Abstract:
A manually energized dispensing system for dispensing a fluid (8) contained in a non-pressurized container (7). The dispensing system comprises a dispensing head (1) comprising a housing (2), a nozzle through which fluid to be dispensed exits, a pump (4) mounted in the housing, and a pump actuation mechanism (3), the pump comprising a rotor (13) rotatably and axially displaceable with respect to a stator (12). The pump rotor comprises first and second axial extensions (17, 18) of different diameters, mounted in corresponding chambers (15, 16) of the stator, first and second seals (19, 20) mounted in the stator housing and sealingly surrounding the first and second axial rotor extensions, the rotor extensions comprising liquid supply channels (22, 24) that, in conjunction with the sealing rings, operate as valves that open and close communication between an inlet of the pump connected to the inside of the container (7) and the pump chambers, respectively the pump chambers and an outlet of the pump connected to the dispensing head nozzle, as a function of the angular displacement of the pump rotor. The rotor is coupled mechanically to the actuation mechanism (3) and the actuation mechanism is configured to be manually operated to release or to drive the pump rotor to dispense fluid, respectively to block the pump rotor to stop dispensing fluid.
Abstract:
The alignment device serves for the positioning and insertion of osteosynthetic fasteners, in particular locking screws or bolts, in the base part of an intramedullary nail implanted in a bone, with an alignment bracket detachably connected to the top end of the intramedullary nail, and with a longitudinal alignment bar attached to the bracket by means of a coupling unit, the bar having a first section and a second section. In the first section, the alignment bar is detachably and movably connected to a coupling unit. By way of the coupling unit, the alignment bar is also detachably and pivotably connected to the alignment bracket. The second section of the alignment bar is provided with at least one guide hole serving to permit the positioning of a bore for locking the base of the intramedullary nail in a bone. The second section of the alignment bar also supports a lockable first spacing-sensor assembly with a spacing sensor whose contact surface making contact with the surface of the base of the intramedullary nail permits a shift perpendicular to the intramedullary nail without losing contact with the nail. In addition, a second spacing-sensor assembly is provided, consisting of an alignment bridge supporting on one side a contactor which is oriented toward a locking hole in the base of the nail and is provided on the other side with guide holes which serve to permit the positioning and insertion of osteosynthetic fasteners in the base part of the nail implanted in a bone. In this manner, the intramedullary nail can be distally locked in two planes in a radially fixed, rotation-resisting position, which constitutes a clinical advantage over conventional systems.
Abstract:
A manually energized dispensing system containing a dispensing head (1) which has a housing (2), a nozzle, a pump (4) mounted in the housing, and a pump actuation mechanism (3) is provided. The pump has a pump rotor (13) and a stator (12). The pump rotor has two axial extensions (17, 18) of different diameters, mounted in corresponding chambers (15, 16) of the stator, and first and second seals (19, 20) mounted in the stator housing and surrounding the first and second axial rotor extensions. The rotor extensions comprising liquid supply channels (22, 24), in conjunction with the seals operate as valves that open and close communication between an inlet of the pump connected to the inside of a container (7) and the pump chambers, respectively. The pump chambers are operated as a function of the angular displacement of the pump rotor.