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:
Mar. 12, 1996
Filed:
Mar. 10, 1995
Derek R Allen, Newport Beach, CA (US);
Other;
Abstract
A stethoscope head having a first pair of acoustical passages in sound communication with a low frequency sound receiving bell and a second pair of acoustical passages in sound communication with a high frequency sound receiving diaphragm. A cylindrical valve plug having a third pair of acoustical passages is disposed within a cylindrical bore into which the first and second pairs of acoustical passages open. A pair of sound tubes are connected to the third acoustical passages within the cylindrical valve plug. The pair of sound tubes act as a lever to facilitate rotation of the cylindrical valve plug to acoustically connect the third acoustical passages with either the first or second pair of acoustical passages.