Patent US3732622A successfully refreshed from Google Patents.
US3732622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for dental drill operation
Assignee: Individual
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Filing: 1971-02-12
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Granted: 1973-05-15
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Expires: 1991-02-12
Abstract
Abstract A dental drill control system has air and water lines connected to air and water supply sources. Solenoid controlled adjustable valves are connected to the air and water supply sources for passing air and water at selected volume rates to a turbine control box for a high speed drill. A hand held switch assembly has switches connected to the solenoids of the valves for selectively passing air at high or low volume rate to the turbine control box accompanied by water flow or without water flow. An existing foot control may by-pass these valves for foot control of air and water supply to the turbine control box. A switch operated relay may pass power to a motor driving a low speed drill and to another solenoid valve passing air to an air and water sprayer under control of one of the hand held switches. An existing foot switch can by-pass the relay to operate the low speed drill and sprayer independently of the hand held switches.
Inventors
- 👤 C Rackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:19
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
A dental drill control system, comprising first air and water lines connected to air and water supply sources respectively; a first solenoid controlled adjustable valve connected to said air line and set to pass air at one volume rate; a second solenoid controlled adjustable valve connected to said air supply line and set to pass air at another volume rate; a third solenoid controlled adjustable valve connected to said water line; a turbine control box for a high speed dental drill connected to said valves via second air and water lines; a hand held electric switch assembly comprising first, second and third switches respectively connected in circuit with the solenoids of the first, second and third valves; and an alternating electric power source connected to said switches, said circuit being arranged so that by selective operation of said switches air will flow to said turbine control box at either volume rate accompanied by water flow or without water flow.
Claim 2
Dependent Claim
159 words
A dental drill control system, comprising first air and water lines connected to air and water supply sources respectively; a first solenoid controlled adjustable valve connected to said air line and set to pass air at one volume rate; a second solenoid controlled adjustable valve connected to said air supply line and set to pass air at another volume rate; a third solenoid controlled adjustable valve connected to said water line; a turbine control box for a high speed dental drill connected to said valves via second air and water lines; a hand held electric switch assembly comprising first, second and third switches respectively connected in circuit with the solenoids of the first, second and third valves; and an alternating electric power source connected to said switches, said circuit being arranged so that by selective operation of said switches air will flow to said turbine control box at either volume rate accompanied by water flow or without water flow.
Claim 3
Dependent Claim
54 words
A dental drill control system as defined in claim 1, further comprising foot controlled valve means removably connected to the first and second air and water lines and by-passing the solenoid controlled valves to permit air and water flow to the turbine control box by foot operation of said foot controlled valve means alone.
Claim 4
Dependent Claim
101 words
A dental drill control system as defined in claim 1, further comprising an electric motor arranged to drive a low speed dental drill; a relay interconnecting the motor and said electric power source; a fourth switch having two positions arranged in circuit with one of said switches for connecting said one switch to its associated solenoid in a first position of the fourth switch and for connecting said one switch to said relay in a second position of the fourth switch, so that operation of said one switch when the fourth switch is in second position controls operation of said motor.
Claim 5
Dependent Claim
61 words
A dental drill control system as defined in claim 3, further comprising a water sprayer connected to the water supply source; and a fourth solenoid controlled valve connected between the air supply and said sprayer, the solenoid of the fourth valve being connected in parallel with said motor for discharging a water spray from the sprayer when the motor is running.
Claim 6
Dependent Claim
37 words
A dental drill control system as defined in claim 4, further comprising a foot controlled switch connected in parallel with said relay for operating the motor independently of the fourth switch, said one switch and said relay.
Claim 7
Dependent Claim
54 words
A dental drill control system as defined in claim 3, further comprising foot controlled valve means removably connected to the first and second air and water lines and by-passing the solenoid controlled valves to permit air and water flow to the turbine control box by foot operation of said foot controlled valve means alone.
Claim 8
Dependent Claim
90 words
A dental drill control system as defined in claim 6, further comprising a water sprayer connected to the water supply source; and a fourth solenoid controlled valve connected between the air supply and said sprayer, the Solenoid of the fourth valve being connected in parallel with said motor for discharging a water spray from the sprayer when the motor is running; and a foot controlled switch connected in parallel with the relay for operating the motor and water sprayer independently of the fourth switch, said one switch, and said relay.
Claim 9
Dependent Claim
40 words
A dental drill control system as defined in claim 7, further comprising means for rectifying alternating current supplied by said power source to operate the relay and solenoids of the first, second and third solenoid controlled valves by direct current.
Claim 10
Dependent Claim
34 words
A dental drill control system as defined in claim 1, further comprising means for rectifying alternating current supplied by said power source to operate the solenoids of the solenoid controlled valves by direct current.
Claim 11
Dependent Claim
34 words
A dental drill control system as defined in claim 6, further comprising means for rectifying alternating current supplied by said power source to operate the solenoids of the solenoid controlled valves by direct current.
References Cited (Backward Citations)
US3346957A
Cited
US3596102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |