Patent US3934526A successfully refreshed from Google Patents.
US3934526A
Expired / Lapsed
US
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Ultrasonic cutting apparatus
Assignee: Cavitron Corp
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Filing: 1974-12-12
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Granted: 1976-01-27
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Expires: 1994-12-12
Abstract
Abstract An ultrasonic cutting apparatus comprising a tuning fork or U-shaped flexural member having legs on which cutting means are mounted, and an ultrasonic drive connected to the flexural member for inducing ultrasonic vibrations in the flexural member. Also disclosed herein is an ultrasonic drive member having a "folded over" resonant holder, and a piezoelectric crystal compressively mounted in the holder by coupling means for transmitting the ultrasonic excitation from the drive to the flexural member.
Inventors
- 👤 Martin A. Damast
- 👤 Vincent P. Abberton
- 👤 Kusler Celestin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:21
CPC Classifications
D; D05; D05B; D05B65/00; B; B26; B26D; B26D7/00; B26D7/08; B26D7/086; D05B73/00; D05B73/04; D05B73/12; D05D; D05D2207/00; D05D2207/02; D05D2207/04; Y; Y10; Y10S; Y10S83/00; Y10S83/909; Y10S83/956
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
50 words
An ultrasonic cutting apparatus comprising a U-shaped flexural member having two legs in opposing relationship; ultrasonic drive means connected to said flexural member for communicatingly exciting said flexural member; and cutting means mounted on each of said legs in an opposing relationship to each other for cutting material placed therebetween.
Claim 2
Dependent Claim
50 words
An ultrasonic cutting apparatus comprising a U-shaped flexural member having two legs in opposing relationship; ultrasonic drive means connected to said flexural member for communicatingly exciting said flexural member; and cutting means mounted on each of said legs in an opposing relationship to each other for cutting material placed therebetween.
Claim 3
Dependent Claim
50 words
The apparatus according to claim 1 wherein said legs have projecting surfaces in opposing and spaced relationship to each other, said surfaces contacting and impacting upon each other when ultrasonic vibrations are induced in said flexural member whereby the impacting action induces secondary modes of vibration to said flexural member.
Claim 4
Dependent Claim
48 words
The apparatus according to claim 1 wherein said ultrasonic drive means comprises a resonant holder connected to said flexural member a piezoelectric crystal mounted in said holder, and responsively excited in the ultrasonic range by electrical excitation means, a coupling means compressively coupling said crystal to said holder.
Claim 5
Dependent Claim
61 words
The apparatus according to claim 3 wherein said piezoelectric crystal is a hollow tube, said holder has a closed end abutting one end of said crystal, said holder being folded over said crystal, and said coupling means compressively holding the other end of said crystal against said abutting closed end whereby the vibrations of said crystal are transmitted to the holder.
Claim 6
Dependent Claim
85 words
The apparatus of claim 4 which additionally comprises, a frame, a mounting block, fixedly mounted on said frame, said block securely clamping said holder at a nodal point thereof; a plate mounted on said frame above said frame, said plate having an opening adjacent said cutting means; and suction means mounted on said frame below said plate and communicating with said plate opening for applying a suction force to material placed over said opening whereby the material is drawn into contact with said cutting means.
Claim 7
Dependent Claim
48 words
The apparatus according to claim 1 wherein said cutting means comprises a first cutting tip mounted on a first of said two legs of said flexural member, and a second cutting tip mounted on the second of said two legs in opposing relationship to said first cutting tip.
Claim 8
Dependent Claim
21 words
The apparatus according to claim 1 wherein said ultrasonic drive means induces said two legs to vibrate 180° out of phase.
Claim 9
Dependent Claim
18 words
The apparatus of claim 2 wherein said ultrasonic drive means induces said two legs to vibrate 180° apart.
Claim 10
Dependent Claim
24 words
The apparatus according to claim 1 wherein said ultrasonic drive means is connected to said flexural member parallel to the axis of symmetry thereof.
Claim 11
Dependent Claim
18 words
The apparatus according to claim 5 wherein said plate and said frame are incorporated in a sewing machine.
Claim 12
Dependent Claim
41 words
The apparatus according to claim 6 wherein said first cutting tip comprises an anvil tip having a rectangular slot and said second cutting tip comprises a base and a rectangular bar mounted on said base in opposing relationship to said slot.
Claim 13
Dependent Claim
39 words
The apparatus according to claim 6 wherein said first cutting tip comprises an anvil having a groove and said second cutting tip comprises a base and a ridge shaped projection on said base in opposing relationship to said groove.
Claim 14
Dependent Claim
23 words
The apparatus according to claim 1 wherein said ultrasonic driving means is connected to said flexural member at about an anti-nodal point thereof.
Claim 15
Dependent Claim
23 words
The apparatus according to claim 1 wherein said ultrasonic drive means is connected to said flexural member at about a nodal point thereof.
Claim 16
Dependent Claim
29 words
The apparatus according to claim 5 wherein said connecting means is connected to said flexural member at an oblique angle to the axis of symmetry of said flexural member.
Claim 17
Dependent Claim
31 words
The apparatus according to claim 6 wherein each of said cutting tips has a semi-circular forward edge, the circular edges inclining inwardly toward each other and forming a cutting throat therebetween.
Claim 18
Dependent Claim
36 words
The apparatus according to claim 1 comprising impact means intermittently contacting at least one of said legs for inducing secondary modes of vibration to said flexural member when ultrasonic vibrations are induced in said flexural member.
Claim 19
Dependent Claim
42 words
The apparatus of claim 1 comprising impact means mounted on at least one of said legs, and fixed means mounted adjacent said impact means inducing secondary modes of vibration to said flexural member when ultrasonic vibrations are induced in said flexural member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |