US3848336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental instrument
Assignee: Individual
•
Filing: 1973-07-02
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Granted: 1974-11-19
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Expires: 1993-07-02
Abstract
Abstract A portable hand-piece dental instrument has a handle mounting a motor and battery. A speed changer is mounted in the handle. It removably mounts a chuck which in turn removably mounts a rotating dental tool.
Inventors
- 👤 J Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:47
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
164 words
A portable dental instrument, comprising: a. a hollow handle, b. an electric motor mounted in said handle, said electric motor having a power output shaft, c. means to power said electric motor mounted in said handle and connected to said motor, d. speed changing means mounted on said handle and connected to said electric motor output shaft, said speed changing means, having an output shaft, and e. rotary dental tool mounting means for removably mounting a rotary dental tool in operating position, mounted on said speed changing means, and connected to said rotary dental tool when mounted to change the operating speed of said tool relative the operating speed of said motor, said mount means has a resilient coupler member connectable between said output shaft and a drive shaft of said rotary dental tool and a sleeve member slidably engagable with said rotary dental tool and mounting said tool by friction pressure such that said tool is rotatable on said sleeve by finger pressure.
Claim 2
Dependent Claim
164 words
A portable dental instrument, comprising: a. a hollow handle, b. an electric motor mounted in said handle, said electric motor having a power output shaft, c. means to power said electric motor mounted in said handle and connected to said motor, d. speed changing means mounted on said handle and connected to said electric motor output shaft, said speed changing means, having an output shaft, and e. rotary dental tool mounting means for removably mounting a rotary dental tool in operating position, mounted on said speed changing means, and connected to said rotary dental tool when mounted to change the operating speed of said tool relative the operating speed of said motor, said mount means has a resilient coupler member connectable between said output shaft and a drive shaft of said rotary dental tool and a sleeve member slidably engagable with said rotary dental tool and mounting said tool by friction pressure such that said tool is rotatable on said sleeve by finger pressure.
Claim 3
Dependent Claim
78 words
The dental instrument of claim 1, wherein: a. said speed changing means has means to operate said rotary dental tool at a rotating speed different from the rotating speed of said motor output shaft, b. said means to power has a rechargeable battery and means to connect said battery with a battery charger means for recharging same said battery, and c. a motor control switch is mounted with said hand-piece and connected with said motor and said battery.
Claim 4
Dependent Claim
37 words
A dental instrument of claim 2, wherein: a. said speed changing means has a first pulley secured to said motor output shaft, a second pulley secured to said output shaft and a drive belt therearound said pulleys.
Claim 5
Dependent Claim
104 words
The dental instrument of claim 3, wherein: a. said sleeve member is removably mountable with said handle, b. said sleeve member is slidably engagable in an annular mount portion of said rotary dental tool, c. said motor is mounted in said handle in a position generally aligning with said battery, d. said means to connect said battery with a battery charger is an induction coil means, and e. said speed changing means is constructed and adapted to operate said rotary dental tool at a rotating speed lesser than the rotating speed of said motor, with said second pulley being larger than said first pulley.
Claim 6
Dependent Claim
87 words
The dental instrument of claim 1, wherein: a. said speed changing means has means to rotate said rotary dental tool at a speed different than the rotating speed of said motor output shaft, b. said means to power has a rechargable battery and means to connect said battery with a battery charger means for recharging, and c. said means to power has a pair of parallely connected control switches, one switch mounted with said handle and a second switch mounted with said rotary dental tool mount means.
Claim 7
Dependent Claim
106 words
The dental instrument of claim 5, wherein: a. said speed changing means has a first pulley secured said motor output shaft, a second pulley secured to said output shaft and a drive belt therearound said pulleys, b. said mount means has means to connect said second switch with said motor and said battery, and c. said mount means has a resilient coupler member connectable between said output shaft and a drive shaft of said rotary dental tool, and a sleeve member slidably engagable with said rotary dental tool mounting said tool by friction pressure such that said tool is rotatable on said sleeve by finger pressure.
Claim 8
Dependent Claim
100 words
The dental instrument of claim 6, wherein: a. said sleeve member is removably mountable with said handle, b. said sleeve member is of a diameter to be slidably engagable in an annular portion of said rotary dental tool, c. said mount means has an outer member secured to said sleeve member and mounting said second switch, d. said means to connect said second switch has one pair of contacts secured to said hand-piece and a second pair of contacts secured to said outer member, said pairs of contacts being cooperatively engagable when said outer member is mounted with said handle.
Claim 9
Dependent Claim
79 words
The dental instrument of claim 3, wherein: a. said sleeve member is removably mountable with said handle, b. said sleeve member is of a size to be slidably engAgable in an annular mount portion of said rotary dental tool, c. said motor is mounted in said handle in a juxtapositional relation to said battery, and d. said output shaft is positioned with said rotatable axis thereof in a spaced relation to said motor and generally aligning with said battery.
Claim 10
Dependent Claim
59 words
The dental instrument of claim 8, wherein: a. said output shaft is positioned with said rotatable axis parallel to said motor and in the space adjacent an end portion of said battery, and b. said means to power has a battery recharger means mounted in said handle connected to said battery and connectable to a source of electrical power.
Claim 11
Dependent Claim
70 words
The dental instrument of claim 2, wherein said speed changing means has a first pulley secured to said motor output shaft, a rotatably mounted intermediate shaft having a second pulley and a third pulley secured therewith, said output shaft having a forth pulley secured therewith, a first drive belt therearound said first pulley and said second pulley and a second drive belt around said third pulley and said fourth pulley.
Claim 12
Dependent Claim
41 words
The dental instrument of claim 10, wherein: a. said intermediate shaft is mounted in a spaced relation to said motor, and b. said output shaft is mounted in a spaced relation to said intermediate shaft and generally aligning with said motor.
Claim 13
Dependent Claim
113 words
The dental instrument of claim 1, wherein: a. said speed changing means has means to rotate said rotary dental tool at a speed different than the rotating speed of said motor output shaft, b. said means to power has a rechargable battery and means to connect said battery with a battery charger means for recharging, c. said battery has a first power cell and a second power cell, and d. said means to power has a first switch means connected to said first power cell and to said motor and a second switch means connected to said first power cell, to said second power cell and to said motor in a series relation.
Claim 14
Dependent Claim
140 words
The dental instrument of claim 12, wherein: a. said speed changing means has a first pulley secured to said motor output shaft, a second pulley secured to said output shaft and a drive belt therearound said pulleys, b. said mount means has a resilient coupler member connectable between said output shaft and a drive shaft of said rotary dental tool, and a sleeve member slidably engagable with said rotary dental tool mounting said tool by friction pressure such that said tool is rotatable on said sleeve by finger pressure, c. said first switch means has a first switch secured with said mount means, d. said second switch means has a second switch secured with said mount means, and e. said mount means has means to connect said first switch and said second switch to said battery and to said motor.
Claim 15
Dependent Claim
104 words
The dental instrument of claim 13, wherein: a. said sleeve member is removably mountable with said handle, b. said sleeve member is slidably engagable in an annular portion of said rotary dental tool, c. said mount means has an outer member adjacent said sleeve member with said first switch and said second switch secured therewith, and d. said means to connect said first switch and said second switch each has a pair of contacts secured said outer member and another portion of each contacts secured to said handle, said pairs of contacts being cooperatively engagable when said outer member is mounted with said handle.
Claim 16
Dependent Claim
28 words
The dental instrument of claim 1, wherein, said speed changing means is constructed to rotate said rotary dental tool at a speed lesser than said motor output shaft.
Claim 17
Dependent Claim
28 words
The dental instrument of claim 1, wherein, said speed changing means is constructed to rotate said rotary dental tool at a speed greater than said motor output shaft.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |