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 Filtered T coupling

Details
Inventors: Blake, Larry W.;
Assignee: Allergan Surgical (Irvine, CA)
Primary Examiner: Rosenbaum; C. Fred
Assistant Examiner: Kartchner; Gene B.
Attorney, Agent or Firm: Knobbe, Martens, Olson & Bear

A fluid T-coupling comprising a through fluid flow path, and an intersecting vent path, wherein the vent path is integrally molded within the filtered bayonet connector to be used with an aspirator to control the level of vacuum communicated to an irrigation/aspiration handpiece during eye surgery.

DETAILED DESCRIPTION I claim: 1.
A fluid T-coupling system, comprising: a filtered fluid T-coupling, comprised of; a substantially linear through fluid flow path having an outlet channel and an inlet channel, a substantially linear vent path having an inflow channel and an outflow channel, said outflow channel intersecting and communicating with said through fluid flow channel, a filter, at least a portion of which is sealed within said T-coupling, wherein said portion of said filter sealed within said T-coupling is positioned between said inflow and outflow channels in such a manner that all fluid flowing from said inflow channel to said outflow channel passes through said portion of said filter, a sealing surface circumventing said inflow channel, and two peripheral tabs connected to said vent path in a plane essentially perpendicular to said inflow channel; and a receptacle to which said T-coupling is selectably lockable, comprised of; a vent channel having an inlet and an outlet, said inlet communicating with an air supply, a sealing surface circumventing said vent channel outlet designed to mate with said sealing surface of said T-coupling, and a peripheral overhanging flange of generally L-shaped cross-section connected to said vent channel outlet, the overhanging portion of said flange including notches through which said tabs can be inserted in a direction essentially parallel to said vent path of said T-coupling, said overhanging flange having a height greater than the height of said tabs, thereby permitting said tabs after said insertion to be rotated about the longitudinal axis of said vent path to lock said tabs beneath said overhanging flange and causing said mating sealing surfaces to form an airtight seal between one another while permitting the communication of said receptacle vent outlet with said T-coupling inflow channel.
2.
The fluid T-coupling system of claim 1 wherein one of said tabs has a shape which allows it to be inserted through only one of said notches in a direction parallel to said vent path



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