Surgery – Body protecting or restraining devices for patients or infants – Head or face protector
Patent
1995-11-20
1998-05-26
Brown, Michael A.
Surgery
Body protecting or restraining devices for patients or infants
Head or face protector
128867, A61F 1106
Patent
active
057552347
ABSTRACT:
A pressure regulating ear plug for regulating the rate of change of pressure inside an ear to minimize the pressure differential between the middle ear and a volume of the external ear cavity adjacent the ear drum is made of an ear plug adapted to fit tightly within the external ear cavity with no or minimal air leakage, and disposed within the ear plug is a pressure regulator with a slow leak rate. The pressure regulator is preferably made of a porous ceramic material.
REFERENCES:
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patent: 3736929 (1973-06-01), Mills
patent: 4338929 (1982-07-01), Lundin et al.
Mossner, W.R., Applications and Properties of Controlled Porosity PM Parts, Metal Powder Report, vol. 43, No. 1, Jan. 1988.
Anderson, J.E., Acoustical-Impedance Characteristics of Sintered Stainless Steel, Journal of The Acoustical Society of America, vol. 36, No. 5, 811-815, May 1964.
Smugeresky, J.E., et al., Prediction of Gas Permeation From Microstructures of Controlled-Density Sintered Media, Modern Developments in Powder Metallurgy, vol. 15 Principles & Processes, 1984 IPMC Proceedings.
Coors Ceramics Company, Porous Ceramics.
Johnson Chris
Mobley J. Phil
O'Connell Drew
Soli Sigfrid D.
Zhang Chaoying
Brown Michael A.
House Ear Institute
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