Osmotically triggered device with gas generating means

Details Osmotically triggered device with gas generating means Osmotically triggered device with gas generating means

1978-12-18

1980-05-20

Michell, Robert W.

Surgery

Respiratory method or device

Ozone or ion generation

2223865, 428327, A61M 3100

Patent

active

042034418

ABSTRACT:
A device is disclosed for supplying and delivering an useful agent. The device comprises (1) a housing defining an internal space, (2) a flexible container in the housing and having a passageway for connecting the container with the exterior of the device, (3) a useful agent in the container, and (4) a gas generating means located between the housing and the container. In operation, when the device is in a fluid environment, fluid is admitted into the device and contacts the means, causing it to produce a gas that exerts pressure against the container. The pressure urges the container to decrease its dimensions and correspondingly deliver agent through the passageway from the device. Also, article of manufactures are enclosed, which articles consists of a gas generating means between two different polymeric films, and a gas generating means housed in a polymeric matrix.

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patent: 3023750 (1962-03-01), Baron
patent: 3114371 (1963-12-01), Montague
patent: 3444290 (1969-05-01), Wai
patent: 3592672 (1971-07-01), Rowley et al.
patent: 3797492 (1974-03-01), Place
patent: 3840009 (1974-10-01), Michaels et al.
patent: 3916899 (1975-11-01), Theeuwes
patent: 4036228 (1977-07-01), Theeuwes
patent: 4111201 (1978-09-01), Theeuwes
patent: 4111203 (1978-09-01), Theeuwes

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