US3875958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1973-10-30
•
Granted: 1975-04-08
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Expires: 1993-10-30
Abstract
Abstract A valve particularly adapted for use in controlling water and air delivered to a dental drill is the present subject matter. The valve generally consists of a valve body having a working air inlet for receiving working air and a working air outlet, which is connected to a dental drill. A working air valve controls the flow of working air to the working valve outlet. A working air valve operator is mounted in the body and is connected to the working air valve for controlling the flow of working air. A first control air passage is connected to the working air valve operator for conducting control air to the working air valve operator. A control air relief port and a control air valve are connected to the first control air passage for selectively determining the pressure in the control air passage for effecting the operation of the working air valve operator. A control air valve operator is connected to the control air valve for selectively positioning the control air valve to effect opening and closing of the working air valve. The body also has a water inlet passage and a water outlet passage, with a water valve controlling the flow of water into the water outlet passage. A water valve operator is connected to the water valve for selectively operating the water valve. A second control air passage is connected to the water valve operator. A second control air relief port is connected to the water valve operator, with a second air control valve controlling the flow of air out of the water valve operator into the second control air relief port to effect the operation of the water valve operator. A third control air passage is connected to the working air inlet. The third control air passage is connected to a third control air valve operator, which is connected to the second control air valve operator.
Inventors
- 👤 Timothy J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:42
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
393 words
A valve for controlling fluids to be delivered to a dental drill comprising, a valve body, a working air inlet in said body adapted for receiving working air, a working air chamber in said valve body connected to the working valve inlet, a working air outlet in said valve body communicating with said working air chamber, a working air valve positioned in said working air chamber for controlling the flow of working air into the working air outlet, a working air valve operator in said valve body connected to said working air valve for moving the working air valve to control the flow of working air into the working air outlet, a first control air passage in said valve body connected to the working air valve operator for conducting first control air under pressure to the working air valve operator, a control air relief port connected to said first control air passage, a control air valve in said valve body for selectively controlling the flow of the first control air from said first control air passage into the control air relief port, a control air valve operator connected to said control air valve, a water inlet passage in said valve body, a water chamber connected to said water inlet passage for conducting water to said water chamber, a water outlet passage in said valve body and connected to the water chamber, a water valve in said chamber controlling the flow of water into the water outlet passage, a water valve operator in said valve body connected to the water valve for selectively operating the water valve to control the flow of water into the water outlet passage, a second control air passage in said body connected to said water valve operator for conducting second control air under pressure to the water valve operator, a second control air relief port connected to the water valve operator, a second control air valve in said body for selectively controlling the flow of second control air out of the water valve operator and into the second control air relief port, a third control air passage in the valve body connected to the working air chamber, and a second control air valve operator connected to the control air passage for receiving working air under pressure, and second control air valve operator connected to the second control air valve.
Claim 2
Dependent Claim
393 words
A valve for controlling fluids to be delivered to a dental drill comprising, a valve body, a working air inlet in said body adapted for receiving working air, a working air chamber in said valve body connected to the working valve inlet, a working air outlet in said valve body communicating with said working air chamber, a working air valve positioned in said working air chamber for controlling the flow of working air into the working air outlet, a working air valve operator in said valve body connected to said working air valve for moving the working air valve to control the flow of working air into the working air outlet, a first control air passage in said valve body connected to the working air valve operator for conducting first control air under pressure to the working air valve operator, a control air relief port connected to said first control air passage, a control air valve in said valve body for selectively controlling the flow of the first control air from said first control air passage into the control air relief port, a control air valve operator connected to said control air valve, a water inlet passage in said valve body, a water chamber connected to said water inlet passage for conducting water to said water chamber, a water outlet passage in said valve body and connected to the water chamber, a water valve in said chamber controlling the flow of water into the water outlet passage, a water valve operator in said valve body connected to the water valve for selectively operating the water valve to control the flow of water into the water outlet passage, a second control air passage in said body connected to said water valve operator for conducting second control air under pressure to the water valve operator, a second control air relief port connected to the water valve operator, a second control air valve in said body for selectively controlling the flow of second control air out of the water valve operator and into the second control air relief port, a third control air passage in the valve body connected to the working air chamber, and a second control air valve operator connected to the control air passage for receiving working air under pressure, and second control air valve operator connected to the second control air valve.
Claim 3
Dependent Claim
72 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1 wherein said water valve operator includes an elastic diaphragm extendible by air pressure to open the water valve and release of the air pressure returns the diaphragm to its normal position to close the water valve and create a negative pressure in the water outlet passage to pull water back into the water outlet passage.
Claim 4
Dependent Claim
46 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1 wherein the water valve is a normally closed valve and the water valve is opened by increasing the pressure of the second control air in the water valve operator.
Claim 5
Dependent Claim
87 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1, including a relief chamber connected to the working air chamber and flow of working air between the relief chamber and the working air chamber is controlled by the working air valve, and a working air relief port connected to the relief chamber to allow working air to be expelled from the relief chamber and the working air chamber upon closing of the working air outlet by the working air valve.
Claim 6
Dependent Claim
99 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1 wherein said second control air valve is normally open to allow control air under pressure from the second control air passage to flow out of the water valve operator to said second control air relief port, and closing of the normally open control air valve causes the second control air to build up air pressure in the water valve operator to move the water valve into an attitude to allow water to pass from the water chamber into the water outlet passage.
Claim 7
Dependent Claim
92 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1 wherein the water valve is a normally closed valve, said water valve operator includes a diaphragm bieng extendible by air pressure to be connected to the water valve to open said water valve and release of air pressure from the diaphragm returns the diaphragm to its normal position to allow the water valve to close and to create a negative pressure in the water outlet passage to pull water back into the water outlet passage.
Claim 8
Dependent Claim
166 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1 wherein said second control air valve is normally open to allow air under pressure from the second control air passage to flow out of the water valve operator to said second control air relief port, and closing of the normally open control air valve causes the air under pressure in the second control air passage to build up air pressure in the water valve operator, said water valve operator includes a diaphragm being extendible by air pressure and being connected to the water valve to move the water valve into an attitude to allow water to pass from the water chamber into the water outlet passage, whereby opening of the water valve operator valve releases the air pressure on the extendible diaphragm to allow the water valve to close and to create a negative pressure in the water outlet passage to pull water back into the water outlet passage.
Claim 9
Dependent Claim
125 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1, including a relief chamber connected to the working air chamber and a flow of working air between the relief chamber and the working air chamber is controlled by the working air valve, and a working air relief port connected to the relief chamber to allow working air to be expelled from the relief chamber and the working air chamber upon closing of the working air outlet by the working air valve, and wherein said water valve operator includes a diaphragm being extendible by air pressure to open the water valve and release of the air pressure returns the diaphragm to its normal position to close the water valve.
Claim 10
Dependent Claim
174 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1, including a relief chamber connected to the working air chamber and flow of air between the relief chamber and the working air chamber is controlled by the working air valve, and a working air relief port connected to the relief chamber to allow working air to be expelled from the relief chamber and the working air chamber upon closing of the working air outlet by the working air valve, and wherein said second control air valve is normally open to allow air under pressure from the second control air passage to flow out of the water valve operator to said second control air relief port, and closing of the normally open control air valve causes the air under pressure in the second control air passage to build up air pressure in the water valve operator to move the water valve into an attitude to allow water to pass from the water chamber into the water outlet passage.
Claim 11
Dependent Claim
234 words
A valve for controlling fluids to be delivered to a dental drill as defined in claim 1, including a relief chamber connected to the working air chamber and flow of air between the relief chamber and the working air chamber is controlled by the working air valve, and a working air relief port connected to the relief chamber to allow working air to be expelled from the relief chamber and the working air chamber upon closing of the working air outlet by the working air valve, and wherein the water valve is a normally closed valve, said second control air valve is normally open to allow air under pressure from the second control air passage to flow out of the water valve operator to said second control air relief port, and closing of the normally open control air valve causes the air under pressure in the second control air passage to build up, said water valve operator includes a diaphragm being extendible by air under pressure from the second air control passage, said diaphragm being connected to the water valve, whereby extension of the extendible diaphragm by air under pressure moves the water valve into an attitude to allow water to pass from the water chamber into the water outlet passage and opening of the water valve operator valve causes release of the air under pressure against the diaphragm to close the water valve.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |