Surgery – Respiratory method or device – Ozone or ion generation
Patent
1977-08-08
1979-07-17
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
128DIG24, A61M 100
Patent
active
041611799
ABSTRACT:
A vacuum bag assembly for wound drainage which utilizes a bag of thin flexible plastic in the form of an initially flat sealed envelope having opposed walls with sealed side edges and end edges and having a sealed catheter to provide communication. Vacuum is created by a pair of springs spaced along the axis of the bag with each spring being in the form of a pair of leaf spring elements lying back-to-back with their ends in register with one another and extending from one side edge of the bag to the other, the leaf spring elements being pre-stressed for bowing mutually outwardly away from the central axis. Relatively stiff flexible sheets are interposed between the springs and the walls of the bag so that upon bowing of the springs the walls of the bag are bowed outwardly uniformly over the major portion of the length thereof into distended pillow shape for development of vacuum at the catheter connection. The flexible sheets extend substantially to the side edges but are inwardly offset from the end edges so that expansion of the bag is unrestricted.
REFERENCES:
patent: 3372975 (1968-03-01), Johnson
patent: 3572340 (1971-03-01), Lloyd et al.
patent: 3752158 (1973-08-01), Kariher
patent: 3780732 (1973-12-01), Leibinsoh
Metatech Corporation
Michell Robert W.
Rose Arthur S.
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