Surgery – Respiratory method or device – Ozone or ion generation
Patent
1977-06-20
1978-11-28
Spear, Jr., Frank A.
Surgery
Respiratory method or device
Ozone or ion generation
29451, 210448, 210479, 210497R, 210DIG3, A61M 500, A61M 504, B01D 3500
Patent
active
041271319
ABSTRACT:
A hub assembly for use in the filtration of fluids comprising a hub with a tapered bore extending therethrough, and a filter membrane in the bore. The filter membrane has a first portion extending across the bore and a second portion extending from the first portion in substantial contact with the hub around the bore. Means within the bore presses the second portion into tight contact with the hub around the bore to secure the filter membrane therein.
A method of fabricating a filter membrane and inserting the same into a hub having a bore extending therethrough, the bore being substantially circular in cross section and tapered to define a large opening at its proximal end and a small opening at its distal end, includes forming a substantially flat, circular filter membrane from a filter medium, the membrane having a diameter larger than the large opening of the bore. The membrane is inserted into the tapered bore so that a first portion thereof is substantially perpendicular to the longitudinal axis of the bore, and as the membrane advances and the circular cross-section of the bore decreases, a second portion of the membrane is formed. This second portion is an annular flange extending from the first portion along the hub around the bore, and facing the large opening. The filter member is advanced a sufficient distance in the bore while pressing radially outwardly by a force against the flange so that the first portion is rendered taut by the wiping action of the flange along the hub. When the combination of the tapered bore and the force pressing against the flange provide a secure fit of the membrane within a predetermined location within the bore, the advance of the filter membrane therein is stopped.
REFERENCES:
patent: 807547 (1905-12-01), Fliegel
patent: 3817389 (1974-06-01), Weichselbaum
patent: 3862036 (1975-01-01), Simmons
patent: 3970084 (1976-07-01), Raines et al.
Burks Richard W.
Johnson & Johnson
Rodrick Richard J.
Spear, Jr. Frank A.
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