Patent US1840216A successfully refreshed from Google Patents.
Patent US3863628A successfully refreshed from Google Patents.
US3863628A
Expired / Lapsed
US
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Dental treatment method and apparatus
Assignee: National Patent Development Corp
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Filing: 1972-12-06
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Granted: 1975-02-04
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Expires: 1992-12-06
Abstract
Abstract In a method for removal of dental plaque and caries in dentistry, there is applied to the teeth a high velocity pulsating jet stream of liquid possibly subjected also to ultrasonic vibration. The jet stream is pulsated, preferably with pulsations having a pressure-time wave form which includes, in each cycle, a period of lowered pressure or nil pressure sufficient for relaxation of the attacked material leading to mechanical fatiguing. The liquid may be neutral to the attacked material for a plaque removal, e.g., water, but for caries removal has a chemical action provided by an alkaline solution containing N-chloro and/or N-dichloro compounds resulting from interaction of certain hypohalites and amine compounds capable of removing plaque and caries both. The method is effective without the application of ultra-sonic vibrations, although their utilization with the aforesaid mechanical fatiguing pulsations is most effective. Utilization of ultra-sonic vibrations with harmonic pulsations is also effective. An embodiment of apparatus for application of the pulsating jet stream in dentistry incorporates pump means designed for providing the preferred pulsation wave forms. Preferably, the pump means is driven by a rotary cam coacting with a cam follower which is adjustable to vary the duration of the pressure stroke during each cycle.
Inventors
- 👤 Jaroslav Vit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:49
CPC Classifications
A; A61; A61Q; A61Q11/00; A61C; A61C17/00; A61C17/02; A61C17/028; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
Apparauts of the typE described comprising means defining a pump chamber including a flexible diaphragm mounted for movement between a first limiting position wherein said pump chamber is of maximum volume and a second position wherein said pump chamber is of minimum volume, power driven cam and cam follower means operatively connected with said diaphragm for effecting a cyclic movement of said diaphragm consisting of a movement from said first position to said second position through a pressure stroke and a movement from said second position to said first position through a suction stroke at a frequency of the order of 100 to 1,600 cycles per minute in which said diaphragm is maintained in said first position during each cycle for a period of the order of 30 to 90 percent of the total period of each cycle, suction conduit means for communicating a source of liquid to said pump chamber, check valve means in said suction conduit means permitting flow of fluid through said conduit means to said chamber but preventing flow in the opposite direction, outlet nozzle means, and pressure conduit means communicating said pump chamber with said outlet nozzle means.
Claim 2
Dependent Claim
193 words
Apparauts of the typE described comprising means defining a pump chamber including a flexible diaphragm mounted for movement between a first limiting position wherein said pump chamber is of maximum volume and a second position wherein said pump chamber is of minimum volume, power driven cam and cam follower means operatively connected with said diaphragm for effecting a cyclic movement of said diaphragm consisting of a movement from said first position to said second position through a pressure stroke and a movement from said second position to said first position through a suction stroke at a frequency of the order of 100 to 1,600 cycles per minute in which said diaphragm is maintained in said first position during each cycle for a period of the order of 30 to 90 percent of the total period of each cycle, suction conduit means for communicating a source of liquid to said pump chamber, check valve means in said suction conduit means permitting flow of fluid through said conduit means to said chamber but preventing flow in the opposite direction, outlet nozzle means, and pressure conduit means communicating said pump chamber with said outlet nozzle means.
Claim 3
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein said outlet nozzle means includes a hypodermic needle tube of a size of the order of 15 to 30 gauge having a handle fixedly connected therewith.
Claim 4
Dependent Claim
15 words
Apparatus as defined in claim 2 including means for generating ultra-sonic vibrations in said handle.
Claim 5
Dependent Claim
48 words
Apparatus as defined in claim 1 wherein said pump chamber defining means includes a body of heat conductive material, heating means in said body and means for controlling the operation of said heating means to maintain the liquid passing through said pump chamber in a predetermined temperature condition.
Claim 6
Dependent Claim
21 words
Apparatus as defined in claim 1 wherein said suction conduit is connected to said pump chamber at the bottom portion thereof.
Claim 7
Dependent Claim
28 words
Apparatus as defined in claim 1 wherein said cam and cam follower includes means for varying the dwell period per cycle of said diaphragm in said first position.
Claim 8
Dependent Claim
177 words
Apparatus for removing dental debris comprising a jet forming means, a liquid pump having an inlet and an outlet communicating with said jet forming means, a container for bulk supply of liquid, non-return valve means providing a communication between said container and said pump inlet, a flexible hose forming a communication between the pump outlet and said jet forming means, a flow control valve for said jet forming means, and means for repeated operation of the pump such that in each cycle of operation there is a period of application of pressure feed followed by a period of non-application of pressure feed, said pump operating means comprising a prime mover, a rotary cam coupled for driving by the prime mover, a cam follower positioned to be abutted by the rotary cam, means coupling the cam follower to a moving element of the pump, means coupled to the cam follower for effecting its return stroke, and adjustable means for limiting the return stroke of the cam follower thereby to permit variation of the working stroke of the pump.
Claim 9
Dependent Claim
177 words
Apparatus for removing dental debris comprising a jet forming means, a liquid pump having an inlet and an outlet communicating with said jet forming means, a container for bulk supply of liquid, non-return valve means providing a communication between said container and said pump inlet, a flexible hose forming a communication between the pump outlet and said jet forming means, a flow control valve for said jet forming means, and means for repeated operation of the pump such that in each cycle of operation there is a period of application of pressure feed followed by a period of non-application of pressure feed, said pump operating means comprising a prime mover, a rotary cam coupled for driving by the prime mover, a cam follower positioned to be abutted by the rotary cam, means coupling the cam follower to a moving element of the pump, means coupled to the cam follower for effecting its return stroke, and adjustable means for limiting the return stroke of the cam follower thereby to permit variation of the working stroke of the pump.
Claim 10
Dependent Claim
189 words
Apparatus of the type described comprising means defining a pump chamber including a pressure member mounted for movement between a first limiting position wherein said pump chamber is of maximum volume and a second position wherein said pump chamber is of minimum volume, power driven means operatively connected with said member for effecting a cyclic movement of said member consisting of a movement from said first position to said second position through a pressure stroke and a movement from said second position to said first position through a suction stroke at a frequency of the order of 100 to 1,600 cycles per minute in which said member is maintained in said first position during each cycle for a period of the order of 30 to 90 percent of the total period of each cycle, suction conduit means for communicating a source of liquid to said pump chamBer, check valve means in said suction conduit means permitting flow of fluid through said conduit means to said chamber but preventing flow in the opposite direction, outlet nozzle means, and pressure conduit means communicating said pump chamber with said outlet nozzle means.
Claim 11
Dependent Claim
189 words
Apparatus of the type described comprising means defining a pump chamber including a pressure member mounted for movement between a first limiting position wherein said pump chamber is of maximum volume and a second position wherein said pump chamber is of minimum volume, power driven means operatively connected with said member for effecting a cyclic movement of said member consisting of a movement from said first position to said second position through a pressure stroke and a movement from said second position to said first position through a suction stroke at a frequency of the order of 100 to 1,600 cycles per minute in which said member is maintained in said first position during each cycle for a period of the order of 30 to 90 percent of the total period of each cycle, suction conduit means for communicating a source of liquid to said pump chamBer, check valve means in said suction conduit means permitting flow of fluid through said conduit means to said chamber but preventing flow in the opposite direction, outlet nozzle means, and pressure conduit means communicating said pump chamber with said outlet nozzle means.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |