US3817141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonically driven cutting knife and method and apparatus for cutting a soft yielding bakery product
Assignee: Individual
•
Filing: 1971-11-24
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Granted: 1974-06-18
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Expires: 1991-11-24
Abstract
Abstract A cutting blade ultrasonically driven and constituting an acoustical impedance transformer which has a longitudinal cutting edge and a length which is substantially equal to an integral number of half wavelengths at the frequency at which the blade is driven. Method and apparatus for cutting a soft yielding bakery product involving ultrasonically vibrating the knife blade that is to cut the product.
Inventors
- 👤 S Simonetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/08; B26D7/086; A; A21; A21C; A21C11/00; A21C11/10; A21C15/00; A21C15/04; Y; Y10; Y10S; Y10S83/00; Y10S83/956; Y10T; Y10T74/00; Y10T74/10; Y10T83/00; Y10T83/647; Y10T83/6584; Y10T83/6603; Y10T83/6606; Y10T83/929; Y10T83/97
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A blade to be ultrasonically driven in the longitudinal direction, comprising an acoustical impedance transfOrmer having a cutting edge extending in the longitudinal direction and of a length in the longitudinal direction substantially equal to an integral number of half wavelengths at the frequency at which the blade is to be driven, said blade being comprised of a base section to receive ultrasonic vibrations and of a length in the longitudinal direction substantially equal to an integral number of quarter wavelengths, an intermediate section at least partially tapered and of a length in the longitudinal direction substantially equal to an integral number of quarter wavelengths, and a tip section along which said cutting edge is located and of a length in the longitudinal direction substantially equal to an integral number of half wavelengths.
Claim 2
Dependent Claim
133 words
A blade to be ultrasonically driven in the longitudinal direction, comprising an acoustical impedance transfOrmer having a cutting edge extending in the longitudinal direction and of a length in the longitudinal direction substantially equal to an integral number of half wavelengths at the frequency at which the blade is to be driven, said blade being comprised of a base section to receive ultrasonic vibrations and of a length in the longitudinal direction substantially equal to an integral number of quarter wavelengths, an intermediate section at least partially tapered and of a length in the longitudinal direction substantially equal to an integral number of quarter wavelengths, and a tip section along which said cutting edge is located and of a length in the longitudinal direction substantially equal to an integral number of half wavelengths.
Claim 3
Dependent Claim
13 words
A blade according to claim 1, and which is about two wavelengths long.
Claim 4
Dependent Claim
14 words
A blade according to claim 1, which is made of titanium alloy or aluminum.
Claim 5
Dependent Claim
15 words
A blade according to claim 3, which is made of titanium 7-4 or 6-4 alloy.
Claim 6
Dependent Claim
16 words
A blade according to claim 1, which includes two cutting edges extending in the longitudinal direction.
Claim 7
Dependent Claim
27 words
A blade according to claim 1 in combination with an ultrasonic transducer for driving the blade at a frequency in the range of 20 to 22 kilohertz.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |