A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 9/007 (2006.01) A61B 17/32 (2006.01) A61B 18/04 (2006.01)
Patent
CA 2358266
A surgical handpiece having two coaxially mounted tubes or channels mounted to a body. The first tube is used for aspiration and is smaller in diameter than the second tube so as to create an annular passage between the first and second tube. The annular gap communicates with a pumping chamber formed between two electrodes. The pumping chamber works by boiling a small volume of the surgical fluid. As the fluid boils, it expands rapidly, thereby propelling the liquid downstream of the pumping chamber out of the annular gap. The distal end of the annular gap is sealed by frictionally fitting together the distal ends of the first and second tube. One or more grooves formed in either the first or second tubes allow fluid being propelled down the annular gap to escape. A stop may be provided against which the escaping fluid impinges such as by crimping the second tube near the distal end of the second tube.
Cohen Donald M.
Sussman Glenn
Alcon Manufacturing Ltd.
Kirby Eades Gale Baker
LandOfFree
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