Patent ID: 9492244
Filing Date: 2016-11-15
CPC Classification: A61C

Claim Text:
1. A dental instrument comprising: a nozzle configured to produce a high-velocity liquid jet; a positioning member having a channel through which the high-velocity liquid jet travels, the positioning member having a proximal end portion and a distal end portion; an impingement member disposed at the distal end portion of the positioning member and having an impingement surface; and a plurality of openings through the distal end portion of the positioning member, wherein the impingement member comprises one or more angled or curved portions that angle or curve back towards the proximal end portion of the positioning member, wherein the one or more angled or curved portions extend distally beyond distal ends of the openings, wherein the nozzle is arranged such that the high-velocity liquid jet impacts the impingement surface at a point distally beyond the distal ends of the openings, and wherein the openings are configured to allow outflow of liquid from the liquid jet after impact with the impingement surface.