US3633703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motoring devices
Assignee: 3M Co
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Filing: 1970-11-27
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Granted: 1972-01-11
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Expires: 1990-11-27
Abstract
Abstract A stethoscope head made entirely of inexpensive plastic adapted for manufacture as a low-cost item having a diaphragm permanently sealed at its periphery to the diaphragm of a shell. The stethoscope head is provided with an arcuately curved diaphragm adapted to conform to the body or arm of a human with tabs extending therefrom for attachment of straps whereby the stethoscope may be attached to the body.
Inventors
- 👤 David Littmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:54
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/02233; A61B7/00; A61B7/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
A stethoscope construction comprising a diaphragm formed of a flat sheet bent into an arcuate shape; support means for said diaphragm comprising a plastic shell having a continuous portion, means bonding said continuous portion and a continuous portion of said diaphragm together to form an enclosed air mass, said shell having a surface with an arcuate cross section in a plane in which said diaphragm also has an arcuate cross section.
Claim 2
Dependent Claim
71 words
A stethoscope construction comprising a diaphragm formed of a flat sheet bent into an arcuate shape; support means for said diaphragm comprising a plastic shell having a continuous portion, means bonding said continuous portion and a continuous portion of said diaphragm together to form an enclosed air mass, said shell having a surface with an arcuate cross section in a plane in which said diaphragm also has an arcuate cross section.
Claim 3
Dependent Claim
33 words
A stethoscope construction as set forth in claim 1 wherein said arcuate cross section of said shEll has a radius that is no greater than the radius of said diaphragm arcuate cross section.
Claim 4
Dependent Claim
19 words
A stethoscope construction as set forth in claim 2 wherein strap engaging tabs extend from said bonded continuous portions.
Claim 5
Dependent Claim
31 words
A stethoscope construction as set forth in claim 3 wherein said tabs extend from opposite ends of said continuous portions and are integrally formed with one of said diaphragm and shell.
Claim 6
Dependent Claim
29 words
A stethoscope construction as set forth in claim 4 wherein said tabs are integrally formed with said shell and extend in directions generally continuous with said arcuate cross section.
Claim 7
Dependent Claim
15 words
A stethoscope as set forth in claim 5 wherein slots are formed in said tabs.
Claim 8
Dependent Claim
23 words
A stethoscope as set forth in claim 6 wherein said shell is formed with an outwardly extending boss having an opening extending therethrough.
Claim 9
Dependent Claim
25 words
A stethoscope construction as set forth in claim 7 having a tubular extension continuous with said opening in said boss and integrally formed with it.
Claim 10
Dependent Claim
29 words
A stethoscope construction as set forth in claim 8 wherein said surface of said shell has an arcuate cross section in a plane normal to said first mentioned plane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |