Diaphragm

Details Diaphragm Diaphragm

1980-10-27

1984-02-28

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

179181R, 181157, 181173, 428 64, 428174, 428192, 428457, B32B 326, B32B 328

Patent

active

044342039

ABSTRACT:
A diaphragm having a pattern of wrinkles adapted so that the diaphragm is both radially and tangentially expandable with respect to a reference point in that central portion.

REFERENCES:
patent: 963362 (1910-07-01), Edison
patent: 1611454 (1926-12-01), Joy
patent: 1632068 (1927-06-01), Harrison
patent: 1859782 (1932-05-01), May
patent: 1990409 (1935-02-01), Lawrance
patent: 3187641 (1965-06-01), Bowditch
patent: 3247927 (1966-04-01), Cragg
patent: 3563337 (1971-02-01), Kawamura
patent: 4129195 (1978-12-01), Ishii et al.

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