US3815241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental handpiece with built-in coolant duct
Assignee: Kaltenbach and Voigt GmbH
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Filing: 1972-11-14
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Granted: 1974-06-11
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Expires: 1992-11-14
Abstract
Abstract A dental handpiece comprising a portion having a built-in coolant conduit which communicates with a tubular insert which is mounted in the handpiece so as to spray coolant onto a tool fitted in the handpiece. The insert is removably mounted in the handpiece, as for example, by screw threads so as to be removable for cleaning or replacement purposes. The insert is provided with two ducts, one being oblique with respect to the axis of the insert. The insert carries a sealing member therewith and the two are inserted and removed as a unit from the handpiece.
Inventors
- 👤 B Lingenhohle
- 👤 M Saupe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:27
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/052
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A dental handpiece comprising a head portion having at least one built-in coolant conduit and a tool-receiving opening, at least one tubular spraying nozzle mounted in said head portion, said nozzle opening into the atmosphere for directing coolant onto a tool mounted in the tool-receiving opening of said head portion, said spraying nozzle being constructed as a tubular insert which is releasably inserted into the head portion from outside at a location offset from said tool-receiving opening, sealing means carried by said insert for being inserted therewith into said head portion or removed therewith from said head portion, said insert having a main central passage which registers with said coolant conduit in the head portion when the insert is mounted in the handpiece, and two ducts extending from said central passage for conducting coolant to said tool, one of said ducts extending parallel to said passage the other obliquely of said passage.
Claim 2
Dependent Claim
152 words
A dental handpiece comprising a head portion having at least one built-in coolant conduit and a tool-receiving opening, at least one tubular spraying nozzle mounted in said head portion, said nozzle opening into the atmosphere for directing coolant onto a tool mounted in the tool-receiving opening of said head portion, said spraying nozzle being constructed as a tubular insert which is releasably inserted into the head portion from outside at a location offset from said tool-receiving opening, sealing means carried by said insert for being inserted therewith into said head portion or removed therewith from said head portion, said insert having a main central passage which registers with said coolant conduit in the head portion when the insert is mounted in the handpiece, and two ducts extending from said central passage for conducting coolant to said tool, one of said ducts extending parallel to said passage the other obliquely of said passage.
Claim 3
Dependent Claim
39 words
A dental handpiece as claimed in claim 1 wherein said tubular insert is turnably mounted in said head portion such that by turning the insert the zone of impingement of the coolant flow onto the tool can be adjusted.
Claim 4
Dependent Claim
33 words
A handpiece according to claim 1, wherein the tubular insert is provided with a slot which is accessible from outside in the inserted mounted position of said tubular insert to enable removal thereof.
Claim 5
Dependent Claim
32 words
A handpiece according to claim 1, wherein the tubular insert and the receiving opening of said head portion are threaded so that said insert is capable of being screwed into the handpiece.
Claim 6
Dependent Claim
28 words
A handpiece according to claim 1, wherein the tubular insert is provided with an external annular groove, said sealing means comprising a packing ring arranged in said groove.
Claim 7
Dependent Claim
23 words
A handpiece according to claim 1 wherein said insert when fitted in the head portion extends at an angle to said coolant conduit.
References Cited (Backward Citations)
US2256729A
Cited
US2442033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |