Patent US4177871A successfully refreshed from Google Patents.
US4177871A
Expired / Lapsed
US
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Toy stethoscope
Assignee: Fisher Price Inc
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Filing: 1977-12-15
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Granted: 1979-12-11
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Expires: 1997-12-15
Abstract
Abstract A toy stethoscope having a resilient sound collector at one end thereof. The sound collector is soft and pliable so as to prevent injury to a person in the event the person is struck by the sound collector. The sound collector further comprises a damper formed from a soft sponge or foam material that prevents unpleasant pressure and/or injury to the ear drums in the event a loud sound is introduced into the sound collector due to someone yelling or blowing directly into the collector or the like.
Inventors
- 👤 W. Porter Clanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:09
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A toy stethoscope for conducting sound comprising: a pair of flexible sound conducting tubes; an ear piece connected to one end portion of each of said tubes; and a soft pliable housing secured to the opposite end portions of said tubes, said housing having a substantially blind bore extending from one end thereof in which the blind end of said bore has at least one opening communicating with the open ends of said opposite end portions of said tubes, said housing further having a pad or block of soft sound damper material mounted within said blind bore and overlying said opening in said blind end for damping the sound conducted through said blind bore and said tubes to said ear pieces.
Claim 2
Dependent Claim
121 words
A toy stethoscope for conducting sound comprising: a pair of flexible sound conducting tubes; an ear piece connected to one end portion of each of said tubes; and a soft pliable housing secured to the opposite end portions of said tubes, said housing having a substantially blind bore extending from one end thereof in which the blind end of said bore has at least one opening communicating with the open ends of said opposite end portions of said tubes, said housing further having a pad or block of soft sound damper material mounted within said blind bore and overlying said opening in said blind end for damping the sound conducted through said blind bore and said tubes to said ear pieces.
Claim 3
Dependent Claim
30 words
The stethoscope of claim 1 wherein said pad or block is formed from a cellular damper material such as plastic foam extending substantially across and substantially closing said blind bore.
Claim 4
Dependent Claim
21 words
The stethoscope of claim 2 wherein said housing further has a sound sealing lip encircling said one end of said housing.
Claim 5
Dependent Claim
51 words
The stethoscope of claim 2 wherein said one end of said housing is cylindrical, said lip is cylindrical and radially spaced from said one end of said housing, and the free end surface of said lip and the outer side surface of said damper material lie substantially in the same plane.
Claim 6
Dependent Claim
104 words
The stethoscope of claim 1 wherein said one end of said housing is cylindrical, said blind bore is cylindrical, said pad is formed from a cellular damper material such as plastic foam which is cylindrical and mounted within and extends substantially across and substantially fills said blind bore with a portion of the inner surface of said pad in engagement with said blind end, and further having a cylindrical sound sealing lip encircling said one end of said housing and radially spaced therefrom, and the free end surface of said lip and the outer surface of said pad lie substantially in the same 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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |