US3783515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental drilling machine having improved cooling
Assignee: US Philips Corp
•
Filing: 1972-10-10
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Granted: 1974-01-08
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Expires: 1992-10-10
Abstract
Abstract A dental drilling machine having a drill spindle which performs two periodic movements: A FAST ROTARY MOVEMENT ABOUT ITS OWN AXIS AND A COMPARATIVELY SLOW ROTARY MOVEMENT ABOUT A STATIONARY AXIS WHICH IS PARALLEL TO THE DRILL SPINDLE. Moreover, a cooling liquid jet which is parallel to the drill spindle performs a slow periodic movement about the same stationary axis such that the liquid jet is periodically directed to the part of the borehole which has been vacated as a result of the slow movement of the drill spindle.
Inventors
- 👤 M Auphan
- 👤 G Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:39
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/18; A61C1/185
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A dental drilling machine comprising a drill spindle rotatable about its axis a first drive system for causing rotation of said spindle, a drill connected to the end of a cooling system having at least one said spindle outlet aperture through which a liquid jet may be directed onto the hole to be drilled a second drive system by means of which the drill spindle can be subjected to a second periodic movement during which it is displaced substantially parallel to itself, the said second periodic movement having a period which exceeds the revolution time of the drill spindle caused by the first drive system, the cooling system being provided with means for periodic displacement of the liquid jet such that the liquid jet always remains directed to a portion of the borehole which has been vacated by the drill as a result of the second periodic movement of the drill spindle.
Claim 2
Dependent Claim
152 words
A dental drilling machine comprising a drill spindle rotatable about its axis a first drive system for causing rotation of said spindle, a drill connected to the end of a cooling system having at least one said spindle outlet aperture through which a liquid jet may be directed onto the hole to be drilled a second drive system by means of which the drill spindle can be subjected to a second periodic movement during which it is displaced substantially parallel to itself, the said second periodic movement having a period which exceeds the revolution time of the drill spindle caused by the first drive system, the cooling system being provided with means for periodic displacement of the liquid jet such that the liquid jet always remains directed to a portion of the borehole which has been vacated by the drill as a result of the second periodic movement of the drill spindle.
Claim 3
Dependent Claim
36 words
A dental drilling machine as claimed in claim 1, wherein the second periodic movement of the drill spindle comprises the completion of a circular path about a stationary axis which is parallel to the drill spindle.
Claim 4
Dependent Claim
59 words
A dental drilling machine as claimed in claim 2, wherein the drill spindle is located in one end of a drive rod, the other end of an eccentric for driving said rod such that it obtains a rotary movement parallel to the rotary movement of the drill spindle, a shaft for guiding said drive rod inserted through a slot.
Claim 5
Dependent Claim
79 words
A dental drilling machine as claimed in claim 2, wherein the outlet aperture of the cooling system is directed such that the liquid jet is substantially parallel to the drill spindle, the outlet aperture being displaceable such that the liquid jet can perform a circular movement about the stationary axis at a speed which is equal to that of the circular movement of the drill spindle, the phase of the said movements being different with respect to each other.
Claim 6
Dependent Claim
28 words
A dental drilling machine as claimed in claim 4, wherein the phase of the circular movement of the liquid jet is opposed to that of the drill spindle.
Claim 7
Dependent Claim
36 words
A dental drilling machine as claimed in claim 4 wherein the outlet aperture is situated in a rotatable sleeve mounted about the drill spindle arranged for movement in synchronism with the movement of the drive rod.
Claim 8
Dependent Claim
67 words
A dental drilling machine as claimed in claim 2, wherein the cooling system comprises two outlet apertures, each of which is directed such that the liquid jet is substantially parallel to the drill spindle, the said outlet apertures being movable such that each liquid jet can describe a to and fro movement along a half circle with a point on the stationary axis as the centre point.
References Cited (Backward Citations)
US3136059A
Cited
US3525154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |