US4581685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: Soken Inc
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Filing: 1983-08-02
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Granted: 1986-04-08
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Expires: 2003-08-02
Abstract
Abstract An ultrasonic transducer having an ultrasonic vibrator for transmitting and receiving ultrasonic waves, and a reflecting plate for imparting directivity to the ultrasonic waves transmitted by the ultrasonic vibrator and for converging the received ultrasonic waves. In the reflecting plate, at least one through hole is formed for passing snow and mud blown upon the reflecting plate by the wind. Each through hole is configured so as not to deteriorate substantially the reflective capacity of the plate.
Inventors
- 👤 Yoshiyuki Kago
- 👤 Shigeyuki Akita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:31
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
An ultrasonic transducer comprising: an ultrasonic vibrator for transmitting and receiving ultrasonic waves; and a reflecting plate having a reflecting surface for reflecting said ultrasonic waves, said reflecting plate being provided with at least one through hole for passing snow and mud blown against the reflecting plate, said at least one hole being so configured as to leave the reflective capacity of said plate substantially unaffected.
Claim 2
Dependent Claim
66 words
An ultrasonic transducer comprising: an ultrasonic vibrator for transmitting and receiving ultrasonic waves; and a reflecting plate having a reflecting surface for reflecting said ultrasonic waves, said reflecting plate being provided with at least one through hole for passing snow and mud blown against the reflecting plate, said at least one hole being so configured as to leave the reflective capacity of said plate substantially unaffected.
Claim 3
Dependent Claim
27 words
An ultrasonic transducer according to claim 1, wherein: said at least one through hole is composed of a large number of slits formed in said reflecting plate.
Claim 4
Dependent Claim
52 words
An ultrasonic transducer according to claim 2, wherein: said slits are formed in parallel with one another; the width of each slit is not less than 0.5 mm and not more than 1.5 mm; and the distance between adjacent slits is not less than 4 mm and not more than 6 mm.
Claim 5
Dependent Claim
24 words
An ultrasonic transducer according to claim 1, wherein: said at least one through hole is composed of a large number of disconnected small holes.
Claim 6
Dependent Claim
48 words
An ultrasonic transducer according to claim 4, wherein: the diameter of said small holes is not less than 3 mm and not more than 6 mm; and the distance between the centers of adjacent small holes is not less than 10 mm and not more than 15 mm.
Claim 7
Dependent Claim
31 words
An ultrasonic transducer according to claim 1, wherein: said at least one through hole is composed of one through hole which is formed in an upper region of said reflecting plate.
Claim 8
Dependent Claim
67 words
An ultrasonic transducer comprising: an ultrasonic vibrator for transmitting and receiving ultrasonic waves; and a reflecting plate having a reflecting surface for reflecting said ultrasonic waves transmitted and received by said ultrasonic vibrator, said plate having a plurality of through holes for passing snow and mud blown against said reflecting plate, said holes being so configured as to leave the reflective capacity of said plate substantially unaffected.
Claim 9
Dependent Claim
67 words
An ultrasonic transducer comprising: an ultrasonic vibrator for transmitting and receiving ultrasonic waves; and a reflecting plate having a reflecting surface for reflecting said ultrasonic waves transmitted and received by said ultrasonic vibrator, said plate having a plurality of through holes for passing snow and mud blown against said reflecting plate, said holes being so configured as to leave the reflective capacity of said plate substantially unaffected.
Claim 10
Dependent Claim
59 words
An ultrasonic transducer according to claim 7 wherein said plurality of through holes include a plurality of parallel slits, each slit having a width greater or equal to 0.5 mm and less than or equal to 1.5 mm, a distance between adjacent slits being greater than or equal to 4 mm and less than or equal to 6 mm.
Claim 11
Dependent Claim
65 words
An ultrasonic transducer according to claim 7 wherein said plurality of through holes include a plurality of substantially circular holes wherein each said hole has a diameter greater than or equal to 3 mm and less than or equal to 6 mm, a distance between centers of adjacent holes being greater than or equal to 10 mm and less than or equal to 15 mm.
References Cited (Backward Citations)
US1827955A
Cited
US2459162A
Cited
US3028752A
Cited
US3046644A
Cited
US3109155A
Cited
US4104610A
Cited
US4348750A
Cited
US4433398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |