US3645255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic tooth-cleaning apparatus
Assignee: Hydrosonic Corp
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Filing: 1970-02-02
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Granted: 1972-02-29
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Expires: 1990-02-02
Abstract
Abstract A dental hand-piece including a ceramic ultrasonic transducer energized by a cable connecting an electronic generator for oscillating each one of a plurality of interchangeable treatment tools retained in the hand-piece. Each of the tools having a bore therethrough. A coupling device for engaging a selected tool with the transducer for oscillation and conducting water therethrough. A water conducting conduit through said transducer and said coupling for conducting pressurized water to flow from the end portion of the tool secured in said hand-piece for ultrasonically cleaning teeth and massaging gums and flushing same with water.
Inventors
- 👤 Seymour Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/16; A61C17/20; B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q1/0027; B23Q1/0036
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
209 words
An ultrasonic dental hand-piece comprising a means forming an elongated handle having a bore therethrough, a tubular ceramic transducer having a pair of electrodes positioned in the bore of said handle against a support means fixed in the rear end portion of said handle, a pair of terminals connecting the said electrodes of said transducer, a pair of flexible electric conductors positioned through the rear portion of said handle connected to said terminals, a dental tool with the outer end thereof terminating in a treatment tip and the rear end thereof terminating in a coaxial coupling means having a coaxial flange spaced from a coaxial planar end surface, a resilient washer positioned between said front end of said transducer and the said rear end of said coupling means, a tubular guard member threaded into the outer end of said bore in said handle and projecting outward therefrom, a second resilient washer positioned between the front surface of said flange and the rear surface of said guard member for urging and holding said coupling means against the front end of said transducer with predetermined pressure whereby said tool will be oscillated by said transducer at an ultrasonic frequency when said conductors are energized by electric ultrasonic energy of predetermined frequency.
Claim 2
Dependent Claim
209 words
An ultrasonic dental hand-piece comprising a means forming an elongated handle having a bore therethrough, a tubular ceramic transducer having a pair of electrodes positioned in the bore of said handle against a support means fixed in the rear end portion of said handle, a pair of terminals connecting the said electrodes of said transducer, a pair of flexible electric conductors positioned through the rear portion of said handle connected to said terminals, a dental tool with the outer end thereof terminating in a treatment tip and the rear end thereof terminating in a coaxial coupling means having a coaxial flange spaced from a coaxial planar end surface, a resilient washer positioned between said front end of said transducer and the said rear end of said coupling means, a tubular guard member threaded into the outer end of said bore in said handle and projecting outward therefrom, a second resilient washer positioned between the front surface of said flange and the rear surface of said guard member for urging and holding said coupling means against the front end of said transducer with predetermined pressure whereby said tool will be oscillated by said transducer at an ultrasonic frequency when said conductors are energized by electric ultrasonic energy of predetermined frequency.
Claim 3
Dependent Claim
58 words
The construction recited in claim 1 including a coaxial projection of predetermined dimensions around the central portion of said transducer, a resilient ring positioned around said transducer adjacent said projection with the outer periphery thereof against the inner surface of said bore in said handle for supporting said transducer for axial oscillation in spaced relation with said bore.
Claim 4
Dependent Claim
124 words
The construction recited in claim 1 including a water-conducting tube secured at the rear end portion thereof through said support means and extending forward substantially through the bore through said transducer, a flexible conduit for conducting pressurized water, a water coupling means connecting the said rear end portion of said tube with said conduit, a cylindrical central extension integral and concentric with the rear end of said coupling means, a water passage through said extension and said coupling and said tool, sealing means connecting the front end of said tube with said extension whereby pressurized water in said conduit will flow through said tube and the outer end portion of said tool for flushing the teeth and gums when said tool is in use.
Claim 5
Dependent Claim
45 words
The construction recited in claim 1 including said tubular guard member with a portion of one side thereof extending from the said handle flattened a predetermined dimension to reduce the diameter thereof for providing greater clearance for the use of a tool within the mouth.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |