Patent US2788493A successfully refreshed from Google Patents.
US4363992A
Expired / Lapsed
US
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Resonator exhibiting uniform motional output
Assignee: Branson Ultrasonics Corp
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Filing: 1981-01-26
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Granted: 1982-12-14
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Expires: 2001-01-26
Abstract
Abstract This invention relates to resonators as used in sonic or ultrasonic apparatus. Particularly with bar type resonators there is manifest a reduction of vibrational amplitude at the output surface from the central area toward the lateral edges. In the present arrangement the input surface is provided with pads to increase the mass ratio between the input and output sections for effecting substantially uniform motional amplitude along the entire output surface.
Inventors
- 👤 Ernest P. Holze, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:14
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B06; B06B; B06B3/00; B23; B23K; B23K20/00; B23K20/10; B23K20/106; B29C66/00; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/816; B29C66/8167; B29C66/90; B29C66/95; B29C66/951; B29C66/9512; B29C66/9516; B29C66/959; B29C66/9592; B29C66/70; B29C66/72; B29C66/729; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/9513; B29C66/9517; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1565; Y10T74/1576
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
An ultrasonic resonator of generally rectangular cross-section dimensioned to operate as a half wavelength resonator at a predetermined frequency of sound travelling longitudinally therethrough from an input surface to an oppositely disposed output surface and through a medially disposed nodal region and including a pair of laterally spaced longitudinal slots disposed in said resonator and extending generally from a region near said input surface to a region near said output surface and passing through said nodal region for interrupting Poisson couplings, and including means for applying vibrations of predetermined frequency at a central portion of said input surface, the improvement comprising: a respective pad disposed at the lateral portions of said input surface for increasing the mass of said resonator at said lateral portions with respect to the central portion of said resonator for achieving substantially uniform motional amplitude along the output surface of the resonator.
Claim 2
Dependent Claim
146 words
An ultrasonic resonator of generally rectangular cross-section dimensioned to operate as a half wavelength resonator at a predetermined frequency of sound travelling longitudinally therethrough from an input surface to an oppositely disposed output surface and through a medially disposed nodal region and including a pair of laterally spaced longitudinal slots disposed in said resonator and extending generally from a region near said input surface to a region near said output surface and passing through said nodal region for interrupting Poisson couplings, and including means for applying vibrations of predetermined frequency at a central portion of said input surface, the improvement comprising: a respective pad disposed at the lateral portions of said input surface for increasing the mass of said resonator at said lateral portions with respect to the central portion of said resonator for achieving substantially uniform motional amplitude along the output surface of the resonator.
Claim 3
Dependent Claim
19 words
A resonator as set forth in claim 1, said pads being an integral part of said resonator input surface.
Claim 4
Dependent Claim
42 words
A resonator as set forth in claim 1, said resonator including a cross-sectional change from said input surface to said output surface for providing increased motional output at said output surface in respect to the motional input applied at said input surface.
Claim 5
Dependent Claim
19 words
A resonator as set forth in claim 3, said pads being an integral part of said resonator input surface.
Claim 6
Dependent Claim
27 words
A resonator as set forth in claim 4, said resonator being dimensioned to operate at a predetermined frequency in the frequency range from 10 to 50 kHz.
Claim 7
Dependent Claim
57 words
A resonator as set forth in claim 4, said pair of laterally spaced slots dividing said resonator substantially into three portions comprising a central portion generally disposed between said slots and two lateral portions to either side of said slots, said respective pads being disposed at the input surface substantially spanning said lateral portions of the resonator.
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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |