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Patent US1586950A successfully refreshed from Google Patents.
US3762052A
Expired / Lapsed
US
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Dentist drill
Assignee: MELDE RICHARD A
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Filing: 1971-12-06
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Granted: 1973-10-02
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Expires: 1991-12-06
Abstract
Abstract A dentist drill which includes means for introducing a coolant, such as water, through a passageway in the drill and the working burr to the work piece. The burr, either in an air bearing, journalled, or mounted within a ball bearing assembly within the head of the dentist''s drill, has an axial passageway which cooperates with a concentric water inlet tube. A radially extending flanged device is attached to and radially extends from the head of the burr or extended shank holding the burr. The water inlet tube passes through an aperture, in a non-contacting relationship, in the center of the flanged device into the end of the burr. An air pressure source introduced from the drill creates an air pressure system about the water inlet tube. A housing, enclosing the flanged member, the head of the burr, and the water inlet tube, includes passageways whereby excess water and air may be discharged into the atmosphere. In operation, the water is forced through the water inlet tube into the burr and passing down the axial cavity will exit through the burr at appropriate exit ports. The air pressure system will tend to exhibit the discharge of water from the head of the burr. Any water which does discharge will contact the flanged device. The flanged device is radially sufficient to cover the width of the journal or ball bearings. Any discharge water tending to flow along the flanged device will be subjected to a centrifugal force exerted by the rotation flanged device and be discharged through the housing passageways. By a combination of air pressure and centrifugal force, the discharge water is inhibited from entering the journal or the ball bearings with subsequent deleterious results to the bearing surface.
Inventors
- 👤 C Melde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:19
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/052; A61C1/055
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
159 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation therewith; an apertured flange connected to said hollow burr in proximity to another of said openings; and a cap secured to said head and positioned over said other opening, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr through said apertured flange and a second passageway cnnected to the air passageway concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water.
Claim 2
Dependent Claim
159 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation therewith; an apertured flange connected to said hollow burr in proximity to another of said openings; and a cap secured to said head and positioned over said other opening, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr through said apertured flange and a second passageway cnnected to the air passageway concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water.
Claim 3
Dependent Claim
20 words
The dental handpiece of claim 1 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 4
Dependent Claim
58 words
A dental handpiece of claim 2 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft, and a second inwardly extending flange partially covering said another opening and being in an overlapping relationship with said radial flange connected to said hollow burr.
Claim 5
Dependent Claim
29 words
A dental handpiece of claim 3 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 6
Dependent Claim
22 words
A dental handpiece of claim 1 wherein said head includes a selectively actuatable brake mechanism for restraining rotation of said hollow burr.
Claim 7
Dependent Claim
41 words
A dental handpiece of claim 1 including a valve for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 8
Dependent Claim
166 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity in said head; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr engaging said tubular drive shaft for rotation therewith extending throUgh one of said openings and through another of said openings; and a cap secured to said head and positioned over said one opening, said cap including a first passageway connected to the water passageway and opening into a cavity centrally disposed within said cap and partially enclosing said hollow shaft extending through said other opening, and a second passageway connected to the air passageway and opening into said centrally disposed cavity for directing a directing a of air into said centrally disposed cavity whereby water and air may be discharged through said hollow burr.
Claim 9
Dependent Claim
166 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity in said head; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr engaging said tubular drive shaft for rotation therewith extending throUgh one of said openings and through another of said openings; and a cap secured to said head and positioned over said one opening, said cap including a first passageway connected to the water passageway and opening into a cavity centrally disposed within said cap and partially enclosing said hollow shaft extending through said other opening, and a second passageway connected to the air passageway and opening into said centrally disposed cavity for directing a directing a of air into said centrally disposed cavity whereby water and air may be discharged through said hollow burr.
Claim 10
Dependent Claim
22 words
The dental handpiece of claim 7 including an apertured radial flange connected to said hollow burr in proximity to said another opening.
Claim 11
Dependent Claim
20 words
The dental handpiece of claim 8 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 12
Dependent Claim
58 words
A dental handpiece of claim 9 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft; and a second inwardly extending flange partially covering said another opening and being in an overlapping relationship with said radial flange connected to said hollow burr.
Claim 13
Dependent Claim
29 words
A dental handpiece of claim 10 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 14
Dependent Claim
22 words
A dental handpiece of claim 7 wherein said head includes a selectively actuable brake mechanism for restraining rotation of said hollow burr.
Claim 15
Dependent Claim
41 words
A dental handpiece of claim 7 including a valve for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 16
Dependent Claim
164 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr engaging said tubular drive shaft for rotation therewith and extending through one of said openings; and a cap secured to said head and positioned over another of said openings, said cap including a water outlet tube connected to the water passageway and extending from said cap into said hollow burr and axially aligned therewith for directing a stream of water into said burr, and an air outlet tube connected to the air passageway and extending into said hollow burr and concentrically surrounding said water outlet tube for pressurizing the water within said hollow burr, whereby water and air may be discharged through said hollow burr.
Claim 17
Dependent Claim
164 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr engaging said tubular drive shaft for rotation therewith and extending through one of said openings; and a cap secured to said head and positioned over another of said openings, said cap including a water outlet tube connected to the water passageway and extending from said cap into said hollow burr and axially aligned therewith for directing a stream of water into said burr, and an air outlet tube connected to the air passageway and extending into said hollow burr and concentrically surrounding said water outlet tube for pressurizing the water within said hollow burr, whereby water and air may be discharged through said hollow burr.
Claim 18
Dependent Claim
22 words
The dental handpiece of claim 14 including an apertured radial flange connected to said hollow burr in proximity to said another opening.
Claim 19
Dependent Claim
20 words
The dental handpiece of claim 15 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 20
Dependent Claim
58 words
A dental handpiece of claim 16 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft; and a second inwardly extending flange partially covering said another opening and being in an overlapping relationhip with said radial flange connected to said hollow burr.
Claim 21
Dependent Claim
29 words
A dental handpiece of claim 17 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 22
Dependent Claim
22 words
A dental handpiece of claim 14 wherein said head includes a selectively actuatable brake mechanism for restraining rotation of said hollow burr.
Claim 23
Dependent Claim
41 words
A dental handpiece of claim 14 including a valve for selectively regulating the flow of both the air and water through the air and water pasSageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 24
Dependent Claim
169 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation therewith; a cap secured to said head and positioned over another of said openings, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway concentrically surrounding said first passageway for directing an enveloping stream of air surrounding the stream of water; and means for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 25
Dependent Claim
169 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation therewith; a cap secured to said head and positioned over another of said openings, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway concentrically surrounding said first passageway for directing an enveloping stream of air surrounding the stream of water; and means for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 26
Dependent Claim
22 words
The dental handpiece of claim 21 including an apertured radial flange connected to said hollow burr in proximity to said another opening.
Claim 27
Dependent Claim
20 words
The dental handpiece of claim 22 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 28
Dependent Claim
58 words
A dental handpiece of claim 23 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft; and a second inwardly extending flange partially covering said another opening and being in an overlapping relationship with said radial flange connected to said hollow burr.
Claim 29
Dependent Claim
29 words
A dental handpiece of claim 24 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 30
Dependent Claim
22 words
A dental handpiece of claim 21 wherein said head includes a selectively actuatable brake mechanism for restraining rotation of said hollow burr.
Claim 31
Dependent Claim
175 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured with said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation herewith, said hollow burr including a shank and a working portion, the latter including a plurality of lateral passageways within said working portion; and a cap secured to said head and positioned over another of said openings, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway connected to the air passageway and concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water, whereby water and air may be discharged through said hollow burr.
Claim 32
Dependent Claim
175 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, air and water passageways extending into said head, and power transmission means secured with said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation herewith, said hollow burr including a shank and a working portion, the latter including a plurality of lateral passageways within said working portion; and a cap secured to said head and positioned over another of said openings, said cap including a first passageway connected to the water passageway and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway connected to the air passageway and concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water, whereby water and air may be discharged through said hollow burr.
Claim 33
Dependent Claim
22 words
The dental handpiece of claim 27 including an apertured radial flange connected to said hollow burr in proximity to said another opening.
Claim 34
Dependent Claim
20 words
The dental handpiece of claim 28 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 35
Dependent Claim
58 words
A dental handpiece of claim 29 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft; and a second inwardly extending flange partially covering said another opening and being in an overlapping relationship with said radial flange connected to said hollow burr.
Claim 36
Dependent Claim
29 words
A dental handpIece of claim 30 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 37
Dependent Claim
22 words
A dental handpiece of claim 27 wherein said head includes a selectively actuatable brake mechanism for restraining rotation of said hollow burr.
Claim 38
Dependent Claim
41 words
A dental handpiece of claim 27 including a valve for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
Claim 39
Dependent Claim
160 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation herewith; an apertured flange connected to said hollow burr in proximity to another of said openings; a cap secured to said head and positioned over said another opening, said cap including a first passageway connected to a supply of water and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway connected to a supply of air and concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water, whereby water and air may be discharged through said hollow burr.
Claim 40
Dependent Claim
160 words
In a dental handpiece having a handle, a shank, a head including a cavity therein, and power transmission means secured within said cavity, the improvement comprising: means defining openings in said head for communicating with said cavity; a rotatable tubular drive shaft secured to said power transmission means; a hollow burr extending through one of said openings and engaging said tubular drive shaft for rotation herewith; an apertured flange connected to said hollow burr in proximity to another of said openings; a cap secured to said head and positioned over said another opening, said cap including a first passageway connected to a supply of water and axially aligned with said hollow burr for directing a stream of water into said burr and a second passageway connected to a supply of air and concentrically surrounding said first passageway for directing an enveloping stream of air surrounding said stream of water, whereby water and air may be discharged through said hollow burr.
Claim 41
Dependent Claim
20 words
The dental handpiece of claim 34 including a radial flange disposed about said tubular drive shaft adjacent said one opening.
Claim 42
Dependent Claim
58 words
A dental handpiece of claim 35 including a first inwardly extending flange partially covering said one opening and being in an overlapping relationship with said radial flange disposed about said drive shaft; and a second inwardly extending flange partially covering said another opening and being in an overlapping relationship with said radial flange connected to said hollow burr.
Claim 43
Dependent Claim
29 words
A dental handpiece of claim 36 wherein said cap includes a plurality of vents, whereby excess air and water accumulating within said cap may be vented into the atmosphere.
Claim 44
Dependent Claim
41 words
A dental handpiece of claim 34 including a valve for selectively regulating the flow of both the air and water through the air and water passageways, whereby the amount of air and water discharged through said hollow burr may be regulated.
References Cited (Backward Citations)
US3624905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |