A surgical handpiece having at least two lumens or tubes mounted to a body. At least one tube is used for aspiration and at least one other tube is used to inject heated surgical fluid for liquefying a cataractous lens. A portion of the second tube is enlarged to form a pumping chamber. The pumping chamber...http://www.google.com/patents/US6676628?utm_source=gb-gplus-sharePatent US6676628 - Pumping chamber for a liquefracture handpiece
