Stethoscope having a body contact piece provided with two alternatively employed auscultation heads
US4823906A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Feb 4, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/026
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A double-headed body contact piece has first and second acoustic connector portions connected to first and second acoustic passages of a stethoscope-tube attachment, and further has a first, non-differential auscultation head with a single auscultation chamber and a second, differential-auscultation head with a pair of chambers which latter are to be placed simultaneously with each other against a patient's body with a predetermined spacing between them. A switchover mechanism has first and second settings, involving registration and non-registration of various passages internal to the body contact piece. In the first setting, acoustic connections are established leading from the single chamber of the first head to both the first and the second acoustic connector portions, these two connections being of at least equivalent geometry and having the same dimensions so as to be acoustically equivalent to each other. In the second setting, one acoustic connection is established leading from one chamber of the second head to one of the acoustic connector portions, and another connection is established leading from the second head's other chamber to the other acoustic connector portion, t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.