Self-sealing dual stethoscope head

Details Self-sealing dual stethoscope head Self-sealing dual stethoscope head

1989-04-20

1990-05-29

Fuller, Benjamin R.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181131, A61B 702, H04R 2500

Patent

active

049287869

ABSTRACT:
A self-sealing dual stethoscope head including a low frequency sound receiving bell, a high frequency sound receiving diaphragm, a selectively movable valve including a cylindrical valve seat having a first acoustical passage in sound communication with the bell and a second acoustical passage in sound communication with the diaphragm, and a cylindrical valve member having a radial opening for selective alignment and sound communication with the bell acoustical passage or the diaphragm acoustical passage upon rotation thereof, the cylindrical valve member being characterized by having at least a portion of an arcuate lengthwise segment of diminished radius as compared to the remaining lengthwise portion of the cylindrical valve member, means for urging the cylindrical valve member into sound sealing contact with the first or second acoustical passages within the valve seat and means for locking the cylindrical valve members into position during alignment with an acoustical passage.

REFERENCES:
patent: 3712409 (1973-01-01), Kizakisz et al.
patent: 4212368 (1980-07-01), Allen
patent: 4823906 (1989-04-01), Gabriel

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