초록 ▼

A bacterial filter unit for use in anesthesia applications and respiratory procedures, which bacterial filter unit comprises a two-piece molded housing, each piece being of a generally frusto-conical shape and having an interlocking edge for joining the two housing pieces together in a sealing locki

A bacterial filter unit for use in anesthesia applications and respiratory procedures, which bacterial filter unit comprises a two-piece molded housing, each piece being of a generally frusto-conical shape and having an interlocking edge for joining the two housing pieces together in a sealing locking engagement, for retention of a filter media formed of fiberglas or other material between the two housing portions, and for sealing the filter media, each housing portion further having a tubular opening at the peak of the frusto-conical portion for connecting the filter unit in the necessary conduit in the anesthesia or respiratory application apparatus for filtering the bacteria passing through the lines.

대표청구항 ▼

A bacteria filter unit comprising in combination a first housing portion and a second housing portion, a filter media adapted to be interposed between said first and second housing portions in sealed relationship therewith, a female locking and gas sealing means formed around the periphery of one en

A bacteria filter unit comprising in combination a first housing portion and a second housing portion, a filter media adapted to be interposed between said first and second housing portions in sealed relationship therewith, a female locking and gas sealing means formed around the periphery of one end of said first housing portion, a gas conduit connecting means formed on the other end of said first housing portion, said female locking and gas sealing means having an outer wall flange and an inner wall flange extending from the peripheral edge of said one end of said first housing portion, said inner and outer wall flanges being parallel to each other in spaced-apart relationship, said outer wall flange extending from said first housing portion a greater distance than said inner wall flange, said outer wall flange having an inwardly projecting lip formed around the inner periphery thereof above the outer end of said inner wall flange, a male locking and gas Sealing means formed around the periphery of one end of said second housing portion, a gas conduit connecting means formed on the other end of said second housing portion, said male locking and gas sealing means comprising a shouldered flange extending from the peripheral edge of said one end of said second housing portion in parallel relationship with the inner and outer wall flanges of said female locking and gas sealing means, said shouldered flange of said male locking and gas sealing means having a first stepped shoulder formed around the inner periphery thereof, the dimension from the end surface of said flange to said inner stepped shoulder of said male locking and gas sealing means generally corresponding to the height of said inner wall of said female locking and gas sealing means, and a second shoulder formed on the outer periphery of said flange of said male locking and gas sealing means, the dimension from the end surface of said flange to said outer shoulder thereon corresponding to the dimension from the bottom of the groove between the inner and outer walls of said female locking and gas sealing means to the lip formed on the inner surface of said outer wall of said female locking and gas sealing means, said filter media having a peripheral dimension corresponding generally to the peripheral dimension of the inner surface of the outer wall flange of said female locking and gas sealing means, whereby, upon engagement of said flange of said male locking and gas sealing means within the groove between said inner and outer wall flanges of said female locking and gas sealing means, said filter media is retained between the end surface of said inner wall of said female locking and gas sealing means and said inner stepped shoulder of said flange of said male locking and gas sealing means and is tensioned by the movement of said shouldered flange of said male locking and gas sealing means into the space between the inner and outer wall flanges of said female locking and gas sealing means and said first housing portion and said second housing portion are locked together in sealing relationship with each other by the engagement of said male locking and gas sealing means within said female locking and gas sealing means. A bacteria filter unit comprising in combination a first housing portion and a second housing portion, a filter media adapted to be interposed and locked between said first and second housing portions in sealed relationship therewith, a female locking and gas sealing means formed around the periphery of one end of said first housing portion, a gas conduit connecting means formed on the other end of said first housing portion, said female locking and gas sealing means having an outer wall flange and an inner wall flange extending from the peripheral edge of said one end of said first housing portion, said inner and outer wall flanges being parallel to each other in spaced-apart relationship, said outer wall flange extending from said first housing portion a greater distance than said inner wall flange, said outer wall flange having an inwardly projecting lip formed around the inner periphery thereof above the outer end of said inner wall flange, said inwardly projecting lip having an outwardly tapering surface on the outermost edge thereof, a male locking and gas sealing means formed around the periphery of one end of said second housing portion, a gas conduit connectinG means formed on the other end of said second housing portion, said male locking and gas sealing means comprising a shouldered flange extending from the peripheral edge of said one end of said second housing portion in parallel relationship with the inner and outer wall flanges of said female locking and gas sealing means, said shouldered flange of said male locking and gas sealing means having a first stepped shoulder formed around the inner periphery thereof and a second shoulder formed on the outer periphery thereof, the distance between said inner stepped shoulder and said outer stepped shoulder on the flange of said male locking and gas sealing means plus the thickness of said filter media being greater than the distance between the end surface of said inner wall flange and the inwardly projecting lip formed on the inner periphery of said outer wall flange of said female locking and gas sealing means to provide a combined lock and seal upon engagement of the shouldered flange of said male locking and gas sealing means within the groove between the inner and outer wall flanges of said female locking and gas sealing means, the outer surface of said shouldered flange of said male locking and gas sealing means being tapered inwardly from the outer stepped shoulder thereon, the outside diameter of the outermost end of the flange of said male locking and gas sealing means plus the thickness of said filter media being equal to the inside diameter of the outer wall flange of said female locking and gas sealing means, the inside diameter of said shouldered flange of said male locking and gas sealing means being equal to the outside diameter of said inner wall flange of said female locking and gas sealing means, whereby, upon engagement of said shouldered flange of said male locking and gas sealing means within the groove between said inner and outer walls of said female locking and gas sealing means, said filter media is tensioned across the end surface of said inner wall of said female locking and gas sealing means and is bent at right angles and compressed between the inner wall flange of said female locking and gas sealing means and the shouldered flange and first stepped shoulder of said male locking and gas sealing means to lock said first and second housing portions together and provide a gas seal around the periphery of said filter media between said first and second housing portions.