US3665682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental evacuation apparatus
Assignee: SS WHITE COMPANY
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Filing: 1970-08-06
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Granted: 1972-05-30
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Expires: 1990-08-06
Abstract
Abstract A dental evacuation unit has a plurality of evacuation devices, each of the devices being connected to a common separator by its respective debris conducting line, and each line having a venturi located therein. Gas supply means are provided for selectively directing a flow of gas through one of the venturis toward the separator, thus creating a suction at the selected device to carry entrained matter through the respective debris conducting line to the separator. Distributing means are provided for diverting a minor portion of the gas flow to each of the other venturis to create a minor suction at the other devices to prevent unfiltered gas within the separator from escaping through the other debris conducting line.
Inventors
- 👤 Anthony Ciavattoni
- 👤 William Hammen
- 👤 Karl Heimur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/14; A61C; A61C17/00; A61C17/06; A61C17/065; Y; Y10; Y10S; Y10S261/00; Y10S261/54; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87877
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
273 words
Dental evacuation apparatus for evacuating debris extracted from a patient''s mouth comprising; a. a plurality of dental evacuation devices; b. a separator adapted to separate gas, liquid, and solids; c. conducting means for conducting liquid and debris from said evacuation devices to said separator, said conducting means comprising a conducting passageway extending from each of said evacuation devices to said separator, each of said conducting passageways having a venturi disposed therein; d. a source of pressurized gas; e. a plurality of gas supply means for conducting gas from said source to the respective venturis, each comprising a supply passageway adapted to discharge said gas toward said separator; f. a plurality of flow control valves, there being at least one valve for each of said supply means, said valves being selectively operable to deliver said gas through a selected one of said supply means to its respective venturi whereby a negative pressure is created at the respective dental evacuation device; g. distributing means for diverting a portion of said gas flowing through the selected supply means to the other of said supply means, said distributing means restrictively connecting each of said supply means with each of the remaining supply means at a point between their respective venturis and valves, the construction and arrangement being such that a major flow of gas is directed through a selected one of said supply means while a minor flow of gas is diverted via said distributing means to the other of said supply means, whereby a major suction is created at the evacuation device selected for operation, and a minor suction is created at the other evacuation devices.
Claim 2
Dependent Claim
273 words
Dental evacuation apparatus for evacuating debris extracted from a patient''s mouth comprising; a. a plurality of dental evacuation devices; b. a separator adapted to separate gas, liquid, and solids; c. conducting means for conducting liquid and debris from said evacuation devices to said separator, said conducting means comprising a conducting passageway extending from each of said evacuation devices to said separator, each of said conducting passageways having a venturi disposed therein; d. a source of pressurized gas; e. a plurality of gas supply means for conducting gas from said source to the respective venturis, each comprising a supply passageway adapted to discharge said gas toward said separator; f. a plurality of flow control valves, there being at least one valve for each of said supply means, said valves being selectively operable to deliver said gas through a selected one of said supply means to its respective venturi whereby a negative pressure is created at the respective dental evacuation device; g. distributing means for diverting a portion of said gas flowing through the selected supply means to the other of said supply means, said distributing means restrictively connecting each of said supply means with each of the remaining supply means at a point between their respective venturis and valves, the construction and arrangement being such that a major flow of gas is directed through a selected one of said supply means while a minor flow of gas is diverted via said distributing means to the other of said supply means, whereby a major suction is created at the evacuation device selected for operation, and a minor suction is created at the other evacuation devices.
Claim 3
Dependent Claim
60 words
Dental evacuation apparatus according to claim 1 wherein said distributing means comprises a block, said block having an internal cavity disposed therein, and a plurality of restricted passageways extending from said cavity to the exterior of said block, said distributing means further including a plurality of conduits for connecting each of said restricted passageways to one of said supply means.
Claim 4
Dependent Claim
16 words
Dental evacuation apparatus according to claim 1 wherein said venturis are disposed adjacent to said separator.
Claim 5
Dependent Claim
113 words
Dental evacuation apparatus according to claim 1, said separator having means defining separation chamber and an exhaust chamber, said separation chamber having an upper portion and a lower portion, a connecting passageway extending through said upper portion to said exhaust chamber, an exhaust passageway extending from said exhaust chamber to the exterior thereof, filtering means disposed within said exhaust chamber between said connecting passageway and said exhaust passageway, said separator being adapted to separate said debris into gas, liquid, and solids whereby the air ascends and passes through said connecting passageway, said filtering means, and said exhaust passageway, while said liquid and solids simultaneously descend to the lower portion of said separation chamber.
Claim 6
Dependent Claim
64 words
Dental evacuation apparatus according to claim 4 wherein said separator further includes liquid discharge means extending from said lower portion of said separation chamber, said liquid discharge means being disposed below said exhaust chamber, a venting passageway extending between said liquid discharge means and said exhaust chamber, said venting passageway communicating with said exhaust chamber on the same side thereof as said connecting passageway.
Claim 7
Dependent Claim
139 words
Dental evacuation apparatus according to claim 5 wherein said upper portion has an inner annular surface of uniform diameter, and said lower portion has an inner annular surface of uniform diameter which is less than that of said upper portion, said separation chamber further including an intermediate portion having an inner annular surface of decreasing diameter as it extends from said upper portion to said lower portion, each of said inner annular surfaces being symetrically disposed about a vertical axis, each of said conducting passageways extending into said upper portion and terminating with a curved portion having substantially the same center of curvature as said inner annular surfaces, each said curved portion being disposed adjacent to one of said inner annular surfaces and adapted to discharge said debris in a whirlpool manner around one of said inner annular surfaces.
Claim 8
Dependent Claim
61 words
Dental evacuation apparatus according to claim 6 wherein said separator includes a cap removably mounted to said lower portion, said cap being disposed below said liquid discharge means and adapted to receive separated solids, said separator further including compensating means, whereby, upon removal of said cap, liquid disposed between said liquid discharge means and said cap is captured within said cap.
Claim 9
Dependent Claim
69 words
Dental evacuation apparatus according to claim 7 wherein said cap comprises a receptacle portion for receiving separated solids, said receptacle portion being threadably connected to said lower portion, said compensating means comprising structure defining an annular upwardly facing channel surrounding the outer surface of said receptacle portion whereby excess liquid disposed above the upper edge of said receptacle portion is captured within said channel upon removal of said cap.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |