Patent ID: 6106496
Filing Date: 2000-08-22
Classification: A61M

Abstract:
Device for inflating balloons comprising in combination: a syringe body and a syringe plunger slidably and rotatably movable in said syringe body, said plunger having an outer screw thread on at least a part of the length of said plunger, said device further comprising a mechanism for retaining said plunger and comprising on one hand a first half nut movable between a position in which said first half nut is spaced from said screw thread and in which said plunger is free to slide in said syringe body, and a position of engagement with said screw thread in which a free sliding of said plunger is impossible and in which said plunger can be selectively screwed and unscrewed in said syringe body, and on the other hand a control element which is mounted to be axially slidable along said syringe body, said control element comprising first coupling means for moving said first movable half nut between said two positions thereof upon the shifting of said control element, said retaining mechanism further comprising a second movable half nut disposed substantially symmetrically with said first movable half nut relative to said plunger, said second half nut being movable simultaneously with said first half nut between a position in which said second half nut is spaced from said screw thread and a position of engagement of said second half nut with said screw thread, and said second control element further comprising second coupling means associated with said second half nut for moving said second half nut, said first and second coupling means being mechanically interconnected in a region in which said control element is coupled to said first and second half nuts.