Compact pulsing pump for irrigation handpiece

Details Compact pulsing pump for irrigation handpiece Compact pulsing pump for irrigation handpiece

A - Human Necessities

61

M

128/103

A61M 3/00 (2006.01) A61C 17/028 (2006.01)

Patent

CA 2007675

COMPACT PULSING PUMP FOR IRRIGATION HANDPIECE ABSTRACT OF THE DISCLOSURE A surgical pulsed irrigation handpiece comprises a pistol-like housing having a handle and a barrel extending forwardly from the top of the handle. A finger actuable trigger is provided on the handle front edge. An axially elongate pulsing pump extends longitudinally in the handle. An outlet tube extending from the top of the pump bends forwardly toward the front end of the barrel. The trigger controls pulsed liquid outflow from the pulsing pump through outlet tube. A preferred pulsing pump provides a piston axially slidable in a casing and a poppit axially slidable with respect to the piston. A first spring urges the piston rearward in the casing. A second spring urges the poppit forwardly with respect to the piston. A pumped liquid chamber in the casing ahead of the piston responds to piston reciprocation to provide a pulsed liquid outflow. The poppit responds to both piston travel and gas pressure in a motor chamber to pop open a gas exhaust port to ter- minate an irrigant liquid pulse and return the piston to a starting position.

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