US3765589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Individual
•
Filing: 1971-10-18
•
Granted: 1973-10-16
•
Expires: 1991-10-18
Abstract
Abstract Apparatus and method are disclosed for welding metal members by means of vibratory energy. Reliability of such welding apparatus is improved by provision of an anvil designed for regulated response to excitation by an ultrasonically-powered sonotrode. The anvil is mounted in an assembly which contributes appropriate support, restraint and isolation.
Inventors
- 👤 T Walraven
- 👤 J Devine
- 👤 N Maropis
- 👤 W Elmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/10; B23K11/12; B23K20/00; B23K20/10; B23K20/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
Welding apparatus comprising an isolated support mass, an anvil reed free at one end and connected at its other end to said mass, a support for said mass and anvil reed, an ultrasonic welding machine having a transducer coupling system, the length of the anvil reed being substantially defined by: L Alpha square root Kco/ omega wherein k is the radius of gyration r/2 of the anvil reed section where r is the radius of the reed, omega is the angular frequency 2 pi f where f is the operating frequency of the transducer coupling system of said ultrasonic welding machine, co is the longitudinal velocity of sound in the anvil reed, Alpha is one of the roots of the transcendental equation: tanh Alpha tan Alpha 0, and the diameter dx of the anvil reed is defined by: dx 0.29 fourth root Px where Px is the desired acoustic power level at which the anvil is to be used, a welding sonotrode operatively associated with the anvil reed to weld the metal members clamped therebetween, said anvil reed having a resonant frequency different from the resonant frequency of said sonotrode.
Claim 2
Dependent Claim
190 words
Welding apparatus comprising an isolated support mass, an anvil reed free at one end and connected at its other end to said mass, a support for said mass and anvil reed, an ultrasonic welding machine having a transducer coupling system, the length of the anvil reed being substantially defined by: L Alpha square root Kco/ omega wherein k is the radius of gyration r/2 of the anvil reed section where r is the radius of the reed, omega is the angular frequency 2 pi f where f is the operating frequency of the transducer coupling system of said ultrasonic welding machine, co is the longitudinal velocity of sound in the anvil reed, Alpha is one of the roots of the transcendental equation: tanh Alpha tan Alpha 0, and the diameter dx of the anvil reed is defined by: dx 0.29 fourth root Px where Px is the desired acoustic power level at which the anvil is to be used, a welding sonotrode operatively associated with the anvil reed to weld the metal members clamped therebetween, said anvil reed having a resonant frequency different from the resonant frequency of said sonotrode.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |