US3727310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way dental syringe
Assignee: Individual
•
Filing: 1971-04-21
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Granted: 1973-04-17
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Expires: 1991-04-21
Abstract
Abstract A dental syringe arranged for convenient selective discharge of water, air or water-air mixture from a nozzle thereof as well as for convenient selective drawing of vacuum from a vacuum passage of the nozzle to thereby provide a four-way action. The syringe is characterized by a convenient pistol-grip construction which facilitates expiditious thumb manipulation of valves controlling the flows of water, air and vacuum through the nozzle during use of the syringe in normal dental procedures. The nozzle is removable for autoclaving or other sterilizing techniques and the water discharge opening is centered in an annular air discharge opening, the vacuum opening being separate therefrom and positioned below the air-water arrangement.
Inventors
- 👤 G Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:17
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/02; A61C17/0208
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A four-way dental syringe comprising a body including a barrel member and a grip merging in angular relationship at a juncture, a vacuum passage, a water passage, and an air passage, each of said passages extending upwardly through said grip membEr and in parallel relation through said barrel, a rotary valve extending transaxially through sad vacuum passage adjacent said juncture, a wing knob on the outer side of the barrel member fixed to said valve and operative to move said valve to control the magnitude of the suction in said vacuum passage, separate valves in the body at said juncture for controlling the flow of fluid through said water and air passages, transversely spaced push buttons on the outer side of the body adjacent said grip member and rearward of said knob for actuating said separate valves, and a nozzle releasably attached to the free end of the barrel member and having passages in the walls thereof communicating with the respective vacuum, water, and air passages in the barrel.
Claim 2
Dependent Claim
169 words
A four-way dental syringe comprising a body including a barrel member and a grip merging in angular relationship at a juncture, a vacuum passage, a water passage, and an air passage, each of said passages extending upwardly through said grip membEr and in parallel relation through said barrel, a rotary valve extending transaxially through sad vacuum passage adjacent said juncture, a wing knob on the outer side of the barrel member fixed to said valve and operative to move said valve to control the magnitude of the suction in said vacuum passage, separate valves in the body at said juncture for controlling the flow of fluid through said water and air passages, transversely spaced push buttons on the outer side of the body adjacent said grip member and rearward of said knob for actuating said separate valves, and a nozzle releasably attached to the free end of the barrel member and having passages in the walls thereof communicating with the respective vacuum, water, and air passages in the barrel.
Claim 3
Dependent Claim
36 words
A four-way dental syringe in accordance with claim 1, in which the discharge end of the suction passage in the nozzle member extends axially outwardly beyond the discharge ends of the water and air passages therein.
Claim 4
Dependent Claim
50 words
A four-way dental syringe in accordance with claim 1, in which means for detachably securing the nozzle member to the barrel member comprises tubular projections forming a portion of the air, water, and suction passages of one of the members and frictionally engaging in the passages of the other members.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |