US4249901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth treatment apparatus
Assignee: Medtronic GmbH
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Filing: 1978-10-19
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Granted: 1981-02-10
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Expires: 1998-10-19
Abstract
Abstract A control and drive unit selectively provides either ultrasonic or high frequency energy to a single handle which contains a coil-driven oscillator capable of driving a cleaning or surgical tool. A changeover switch connects the selected signal to the handle and a single control is effective to control either frequency range. A water supply, coupled to the single control, is actuated when a predetermined level of signal power is attained.
Inventors
- 👤 Alfred Wieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:24
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/07; A61C17/00; A61C17/16; A61C17/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
Tooth treatment instrument comprising: (a) a handle arrangement; (b) vibratory transducer means in said handle arrangement for receiving said electrical signal and for generating an oscillatory mechanical output; (c) first signal generator means for generating an ultrasonic electrical signal; (d) second signal generating means for generating a high frequency electrical signal; and (e) changeover means for selectively connecting the signal from the first or second generator means to the handle arrangement.
Claim 2
Dependent Claim
71 words
Tooth treatment instrument comprising: (a) a handle arrangement; (b) vibratory transducer means in said handle arrangement for receiving said electrical signal and for generating an oscillatory mechanical output; (c) first signal generator means for generating an ultrasonic electrical signal; (d) second signal generating means for generating a high frequency electrical signal; and (e) changeover means for selectively connecting the signal from the first or second generator means to the handle arrangement.
Claim 3
Dependent Claim
47 words
Tooth treatment instrument according to claim 1 further comprising water supply means for supplying water to said handle arrangement and comprising water control means, said water control means being effective above a certain power level of the high frequency signal, to switch on the water supply means.
Claim 4
Dependent Claim
29 words
Tooth treatment instrument according to claim 2 further comprising a single regulating arrangement for controlling the power level of the high frequency signal and for controlling the water supply.
Claim 5
Dependent Claim
39 words
Tooth treatment instrument according to the claim 3 wherein the regulating arrangement, on adjusting a certain power level for the high frequency signal, is effective to supply a control signal for opening a valve in the water supply system.
Claim 6
Dependent Claim
20 words
Tooth treatment instrument according to claim 1, further comprising means for detachably attaching a tool to said vibratory transducer means.
Claim 7
Dependent Claim
73 words
Tooth treatment instrument according to claim 5, further comprising water supply means for supplying water to said handle arrangement and water control, said means for detachably attaching a tool being operative to attach a high frequency surgical tool having a water outlet nozzle means thereon to said handle arrangement, said water outlet nozzle means being connected with said water supply means, and being effective to direct a water jet onto an operating point.
Claim 8
Dependent Claim
109 words
Tooth treatment instrument comprising: (a) a handle arrangement containing a vibratory transducer including a coil; (b) first signal generator means for generating an ultrasonic electrical signal; (c) second signal generator means for generating a high frequency electrical signal; (d) changeover means for selectively connecting said ultrasonic signal or said high frequency signal to said coil; (e) regulating means for controlling whichever one of said first and second signal generator means is connected to said coil; (f) means for detachably attaching a tool to said oscillator; (g) water supply means for supplying water to said tool; and (h) said regulating means also being effective for controlling said water supply means.
Claim 9
Dependent Claim
109 words
Tooth treatment instrument comprising: (a) a handle arrangement containing a vibratory transducer including a coil; (b) first signal generator means for generating an ultrasonic electrical signal; (c) second signal generator means for generating a high frequency electrical signal; (d) changeover means for selectively connecting said ultrasonic signal or said high frequency signal to said coil; (e) regulating means for controlling whichever one of said first and second signal generator means is connected to said coil; (f) means for detachably attaching a tool to said oscillator; (g) water supply means for supplying water to said tool; and (h) said regulating means also being effective for controlling said water supply means.
Claim 10
Dependent Claim
22 words
Tooth treatment instrument according to claim 7 or 1 wherein the high frequency signal has a frequency of at least 1 MHz.
Claim 11
Dependent Claim
19 words
Tooth treatment instrument according to the claim 7 or 1 wherein the changeover means is a relay changeover switch.
Claim 12
Dependent Claim
43 words
Tooth treatment instrument according to claim 7 or 1 wherein said changeover means is effective to connect said high frequency signal in parallel from one output terminal of a generator supplying a high frequency signal to all input terminals of said handle arrangement.
References Cited (Backward Citations)
US3213537A
Cited
USRE28752E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |