US4326274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission system of aerial ultrasonic pulse and ultrasonic transmitter and receiver used in the system
Assignee: J Morita Manufaturing Corp
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Filing: 1980-07-03
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Granted: 1982-04-20
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Expires: 2000-07-03
Abstract
Abstract The disclosure relates to a system for aerially transmitting an ultrasonic view of a vibration mode, small in angle of direction, in a clear state and to a transmitter and a receiver used in the system. According to the system, an ultrasonic pulse can be used for distance measurement, control and other signal means even at relatively short distance.
Inventors
- 👤 Mitsuhiko Hotta
- 👤 Shuhei Furuichi
- 👤 Takanori Shigihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:34
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0681; H; H04; H04B; H04B11/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
183 words
A transmission system for aerial ultrasonic pulses comprising: an ultrasonic transmitter and an ultrasonic receiver in opposing relationship along a straight line, said transmitter and receiver each comprising: a thickness vibration type piezoelectric element having a front end face portion; a vibration absorbing material hermetically enclosing said piezoelectric element except said front end face portion; a casing enclosing said vibration absorbing material and having an open end which corresponds with said front end face portion of said piezoelectric element; a cover closing said open end of said casing, said cover comprising a protective film having excellent sound transmissivity; a vibration transmitting adhesive layer provided between said protective film and said front end face portion; and a vibration absorbing adhesive provided between a periphery of said cover and said casing; said transmitter and receiver being arranged such that said front end face portions of said transmitter and receiver face each other; whereby when said transmitter emits an ultrasonic pulse in response to a signal pulse, said receiver receives said ultrasonic pulse and converts said ultrasonic pulse to a voltage corresponding to said signal pulse.
Claim 2
Dependent Claim
183 words
A transmission system for aerial ultrasonic pulses comprising: an ultrasonic transmitter and an ultrasonic receiver in opposing relationship along a straight line, said transmitter and receiver each comprising: a thickness vibration type piezoelectric element having a front end face portion; a vibration absorbing material hermetically enclosing said piezoelectric element except said front end face portion; a casing enclosing said vibration absorbing material and having an open end which corresponds with said front end face portion of said piezoelectric element; a cover closing said open end of said casing, said cover comprising a protective film having excellent sound transmissivity; a vibration transmitting adhesive layer provided between said protective film and said front end face portion; and a vibration absorbing adhesive provided between a periphery of said cover and said casing; said transmitter and receiver being arranged such that said front end face portions of said transmitter and receiver face each other; whereby when said transmitter emits an ultrasonic pulse in response to a signal pulse, said receiver receives said ultrasonic pulse and converts said ultrasonic pulse to a voltage corresponding to said signal pulse.
Claim 3
Dependent Claim
29 words
An ultrasonic transmission unit according to claim 1, wherein the transmitter and receiver are provided in contact with said casing with a vibration absorbing sealing rear side finishing layer.
Claim 4
Dependent Claim
112 words
An ultrasonic transmission system according to claim 2, wherein said vibration absorbing material is made of a material selected from the group consisting of polyurethane foam and other soft plastic foam, sponge, and glass fibers, said casing is made of a material selected from the group consisting of polyacetal and other hard plastic resins, said cover is made of a material selected from the group consisting of polyethylene, polystyrene, and other high-polymer-based soft plastic resins, said vibration transmission adhesive is a hard adhesive agent having no vibration adhesibility, and said vibration absorbing adhesive is made of a material selected from the group consisting of silicon rubber and other visco-elastic rubber-based adhesive agents.
Claim 5
Dependent Claim
21 words
An ultrasonic transmission unit according to claims 2 or 3, wherein said rear side finishing layer is made from bitumen materials.
References Cited (Backward Citations)
US3427481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |