The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 1978
Filed:
Jan. 13, 1977
Leonard R Proctor, Chicago, IL (US);
Raymond G Byrnes, Oak Lawn, IL (US);
Abstract
A caloric testing apparatus for introducing heated or cooled air, under direct visual control, into the outer ear canal of a human subject for purposes of testing inner ear balance mechanisms. The device includes a speculum for observing the ear canal during the flow of air, thereby assuring proper direction of the impinging air jet. The apparatus includes temperature-controlled liquid baths for providing hot or cold air, and has arrangements for providing suitably timed irrigation periods, adjustable so as to control the magnitudes of the caloric stimulations. Measurements can be made by the electrical recording of eye movements for accurate measurement of nystagmic response intensity.