Patent US3587776A successfully refreshed from Google Patents.
US3587776A
Expired / Lapsed
US
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Diaphragm mounting for stethoscope chest piece
Assignee: Becton Dickinson and Co
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Filing: 1969-04-23
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Granted: 1971-06-28
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Expires: 1989-04-23
Abstract
Abstract A STETHOSCOPE CHEST PIECE COMPRISING A MICROPHONE HOUSING HAVING SURFACES DEFINING AN OPENING INTO THE INTERIOR THEREOF DISPOSED WITHIN A CIRCULAR SIDEWALL AND A DIAPHRAGM ADAPTED TO FIT OVER THE OPENING. THE DIAPHRAGM CONSISTS OF A MEMBRANE DISPOSED WITHIN AN ELASTIC RING SUBSTANTIALLY TRANSVERSE TO THE PRINCIPAL PLANE OF THE MEMBRANE AND HAVING INWARDLY PROJECTING SURFACES TO ENGAGE PORTIONS OF THE SIDEWALL. THE DIAPHRAGM IS THUS ADAPTED TO BE STRETCHED OVER THE BOTTOM OF THE EDGE OF THE SIDEWALL SO THAT THE INWARDLY PROJECTING SURFACES MAY ENGAGE WITH PORTIONS OF THE SIDEWALL. THE BOTTOM EDGE OF THE SIDEWALL THEREAFTER COOPERATES IN RETAINING THE DIAPHRAGM IN POSITION.
Inventors
- 👤 Robert M Haiken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:39
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02; A61B7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |