Negative pressure respirator shells

Details Negative pressure respirator shells Negative pressure respirator shells

1978-10-19

1981-03-24

Yasko, John D.

Surgery

Truss

Perineal

128298, A61H 3102

Patent

active

042574072

ABSTRACT:
A portable negative pressure respirator shell comprising a plurality, typically two, of rigid shell sections co-operable to provide an open ended shell for a patient's torso. Variable resilience flexible sealing lips are disposed along the top and bottom edges of the shell sections to aid in providing an airtight engagement with the body surface of the patient on the application of a negative pressure to said chamber, which engagement may be relieved by a suitable greater pressure in said chamber. The sealing lips are advantageously of reducing thickness and directed inwardly. Also disclosed are a power unit and reciprocatory valve for use with the respirator.

REFERENCES:
patent: 230351 (1880-07-01), Seyberlich
patent: 1670301 (1928-05-01), Eisenmenger
patent: 1864700 (1932-06-01), Wade
patent: 2036248 (1936-04-01), Acklen
patent: 2067268 (1937-01-01), Hans
patent: 2456724 (1948-12-01), Mullikin
patent: 2480980 (1949-09-01), Terhaar
patent: 2772673 (1956-12-01), Huxley
patent: 3078842 (1963-02-01), Gray

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