Patent EP0394583A2 successfully refreshed from Google Patents.
EP0394583A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical operation device
Assignee: Sumitomo Bakelite Co Ltd
•
Filing: 1989-10-12
•
Granted: —
•
Expires: 2009-10-12
Abstract
Abstract A surgical operation device comprising an ultrasonic piezoelectric transducer (34) for generating ultrasonic vibrations, an oscillation feedback type oscillator (1) for supplying high-frequency power to the ultrasonic transducer, a vibration transmitter (62) connected to the ultrasonic transducer for transmitting and amplifying mechanical vibrations at an ultrasonic frequency, a suction unit (20) and an irrigator (14). The ultrasonic transducer (34) includes a bolted Langevin type transducer. The feedback circuit of the oscillation feedback type oscillator includes an oscillation voltage detector (22), a phase comparator (23), a low pass filter (24), a differential amplifier (25), and a voltage controlled oscillator (26). Thus, the mechanical resonant frequency can be traced in a wide range of fluctuations of a load on the vibration transmitter during vibration and vibrations can start an appropriate mechanical resonant frequency irrespective of the load status of the vibration transmitter at the start-up.
Inventors
- 👤 Morito Idemoto
- 👤 Naohiko Inoue
- 👤 Yasuo Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320068; B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0253; B06B3/00; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B2017/32007; A61B2017/320072; A61B2017/320074; A61B2017/320078; A61B2017/32008; A61B2018/00005; A61B2018/00011; A61B2217/00; A61B2217/002; A61B2217/007; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00745; A61M; A61M3/00; A61M3/02; A61M3/0279; B06B2201/00; B06B2201/70; B06B2201/76
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A surgical operation device comprising: an ultrasonic piezoelectric transducer (34) for generating ultrasonic vibrations; an oscillation feedback type oscillator (1) for supplying high-frequency power to the transducer; a vibration transmitter (62) connected to the resonantor for transmitting and amplifying a mechanical vibration at an ultrasonic frequency; a sucking unit (20); and an irrigator (14); wherein the piezoelectric transducer (34) includes a bolted Langevin type transducer; and wherein the feedback circuit of the oscillation feedback type oscillator (1) includes an oscillation voltage detector (22), a phase comparator (23), a low pass filter (24), a differential amplifier (25), and a voltage controlled oscillator (26).
Claim 2
Dependent Claim
102 words
A surgical operation device comprising: an ultrasonic piezoelectric transducer (34) for generating ultrasonic vibrations; an oscillation feedback type oscillator (1) for supplying high-frequency power to the transducer; a vibration transmitter (62) connected to the resonantor for transmitting and amplifying a mechanical vibration at an ultrasonic frequency; a sucking unit (20); and an irrigator (14); wherein the piezoelectric transducer (34) includes a bolted Langevin type transducer; and wherein the feedback circuit of the oscillation feedback type oscillator (1) includes an oscillation voltage detector (22), a phase comparator (23), a low pass filter (24), a differential amplifier (25), and a voltage controlled oscillator (26).
Claim 3
Dependent Claim
43 words
A surgical operation device according to claim 1, wherein the oscillation voltage detector (22) includes a motional bridge (29), a base clipper (30), a voltage adjuster (31), and an input level converter (32), and wherein the low pass filter includes a lag filter.
Claim 4
Dependent Claim
84 words
A surgical operation device according to claim 1, wherein the Langevin type transducer includes a stack of alternating one or more ring-like electrostrictive elements (35, 43, 44) and ring-like electrodes (37, 45, 47) one larger in number than the electrostrictive elements and connected electrically in parallel, a pair of insulators (41, 42) holding the stack therebetween, a pair of metal blocks (48, 49) placed outside the corresponding insulators (41, 42) and a bolt tightening those elements by extending through the center of those elements.
Claim 5
Dependent Claim
24 words
A surgical operation device according to claim 3, wherein the insulators each include a ceramic material having an electrical resistance higher than 10¹³ Ωcm.
Claim 6
Dependent Claim
103 words
A surgical operation device according to claim 1, wherein the ultrasonic vibration transmitter transmits and amplifies a mechanical vibration of an ultrasonic frequency and includes a connecting portion (53, 65, 70, 78, 86, 93) which comprises a stem portion of a constant cross section area (58) and a tapering portion extending from the stem portion, and an operation section (56, 67, 69, 79, 87, 94) connected removably to the tapering portion wherein a node of vibration occurs at the junction between the stem portion and the tapering portion and a side of the vibration occurs at a free end of the operation section.
Claim 7
Dependent Claim
23 words
A surgical operation device according to claim 5, wherein the means for connecting the connecting portion and operation section includes a thread (54).
Claim 8
Dependent Claim
32 words
A surgical operation device according to claim 5, wherein the bolted Langevin type transducer and the ultrasonic vibration transmitter or the ultrasonic vibration transmitter have a fluid path (52, 64) extending therethrough.
Claim 9
Dependent Claim
37 words
A surgical operation device according to claim 7, wherein the cross sectional area of the fluid path (64) in the connecting portion is equal to, or larger than, that of the fluid path in the operation section.
Claim 10
Dependent Claim
30 words
A surgical operation device according to claim 5, wherein the material and density of the connecting portion (53) are equal to, or higher than, those of the operation section (56).
Claim 11
Dependent Claim
33 words
A surgical operation device according to claim 5, wherein a forward portion of the operation section (56) is bent at angles of 5 - 120 degrees to the longitudinal axis of the device.
Claim 12
Dependent Claim
48 words
A surgical operation device according to claim 1, wherein the ultrasonic vibration transmitter (210) includes an operation section (211) of a blade form contacting the organization of an organism and has a fluid path (212) extending therethrough, one end of the path being open in the operation section.
Claim 13
Dependent Claim
46 words
A surgical operation device according to claim 11, wherein the ultrasonic vibration transmitter (224) includes a connecting portion (225) extending at an angle, or parallel, to the direction of mechanical vibrations at an ultrasonic frequency and an operation section (226) contacting the organization of an organism.
Claim 14
Dependent Claim
37 words
A surgical operation device according to claim 11, wherein the end portion of the ultrasonic vibration transmitter (227) including the operation section (228) extends at an angle to the direction of mechanical vibrations at an ultrasonic frequency.
Claim 15
Dependent Claim
31 words
A surgical operation device according to claim 1, including a switch (229) provided on the side of a handpiece (231) including a bolted Langevin type transducer and an ultrasonic vibration transmitter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.