US4619613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk dental syringe
Assignee: Individual
•
Filing: 1984-03-12
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Granted: 1986-10-28
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Expires: 2004-03-12
Abstract
Abstract A bulk dental syringe for dispensing predetermined incremental amounts of dental material that includes a barrel assembly that contains a bulk supply of dental material. The barrel assembly is detachably connected to a handle or holder which may be either a finger holder or a lever actuated holder. The barrel assembly is sealed at one end with a displaceable plug or piston, which is engaged by a plunger to express the material therefrom . A discharge spout and a plurality of flexible fingers circumscribing the spout is connected to the other end of the barrel assembly, and a disposable nozzle tip is releaseably secured to the spout by the flexible fingers. A lock collar is provided to positively maintain the flexibe fingers in securement about the nozzle tip. To prevent drooling of the material, a pressure relief arrangement is provided on the end of the plunger.
Inventors
- 👤 William B. Dragan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00593; A; A61; A61C; A61C9/00; A61C9/0026; B05C17/00576; B05C17/00579; B05C17/01; B05C17/014; A61C2202/00; A61C2202/01; B05C17/00503; B05C17/00506; B05C17/00516
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
203 words
A dental syringe for dispensing a predetermined amount of dental material directly to a tooth from a bulk supply of said material comprising a barrel means defining an elongated tubular member adapted to contain a bulk supply of a dental material, a discharge spout formed on one end of said tubular member, said tubular member being opened at its other end, a plug sealing said opened end to confine a material within said tubular member, means defining a plurality of flexible fingers connected to said tubular member, said fingers circumscribing said discharge spout, said fingers having an internal retaining notch, a nozzle tip detachably connected to said spout, said tip having a laterally extending flange adjacent one end and a nozzle orifice formed at its other end, said nozzle tip being fitted over said spout whereby said flange is engaged by said finger retaining notch for detachably retaining said nozzle tip on said spout, and a collar slidably disposed relative to said fingers for positively securing said fingers in gripping relationship onto said nozzle tip, a plunger slidably mounted within said tubular member for engaging said plug for extruding the dental material through said point and associated tip as said plug is displaced.
Claim 2
Dependent Claim
203 words
A dental syringe for dispensing a predetermined amount of dental material directly to a tooth from a bulk supply of said material comprising a barrel means defining an elongated tubular member adapted to contain a bulk supply of a dental material, a discharge spout formed on one end of said tubular member, said tubular member being opened at its other end, a plug sealing said opened end to confine a material within said tubular member, means defining a plurality of flexible fingers connected to said tubular member, said fingers circumscribing said discharge spout, said fingers having an internal retaining notch, a nozzle tip detachably connected to said spout, said tip having a laterally extending flange adjacent one end and a nozzle orifice formed at its other end, said nozzle tip being fitted over said spout whereby said flange is engaged by said finger retaining notch for detachably retaining said nozzle tip on said spout, and a collar slidably disposed relative to said fingers for positively securing said fingers in gripping relationship onto said nozzle tip, a plunger slidably mounted within said tubular member for engaging said plug for extruding the dental material through said point and associated tip as said plug is displaced.
Claim 3
Dependent Claim
38 words
A dental syringe as defined in claim 1 and including means operatively connected to said plunger to prohibit drooling of the material from said tubular member upon release of the pressure imparted by said plunger to said plug.
Claim 4
Dependent Claim
19 words
A dental syringe as defined in claim 1 wherein said flange circumscribes said one end of said nozzle tip.
Claim 5
Dependent Claim
15 words
A dental syringe as defined in claim 1 wherein said laterally extending flange is non-circular.
Claim 6
Dependent Claim
31 words
A dental syringe as defined in claim 1 wherein said flange extends laterally a progressively varying amount whereby the retention force of said fingers acting on said nozzle tip varies accordingly.
Claim 7
Dependent Claim
114 words
A dental syringe for incrementally dispensing a predetermined amount of material from a bulk supply directly to a tooth comprising a tubular barrel means adapted to contain a bulk supply of dental material, a spout formed on one end of said barrel, a plurality of flexible fingers circumscribing said spout, a detachable nozzle tip fitted on said spout, means for positively securing said nozzle tip to said spout to prohibit said nozzle tip from becoming separated from said spout during the extruding of said material from said barrel means, and a plunger means slidably mounted in said barrel for expressing said material therefrom by displacement of said plunger means relative to said barrel means.
Claim 8
Dependent Claim
114 words
A dental syringe for incrementally dispensing a predetermined amount of material from a bulk supply directly to a tooth comprising a tubular barrel means adapted to contain a bulk supply of dental material, a spout formed on one end of said barrel, a plurality of flexible fingers circumscribing said spout, a detachable nozzle tip fitted on said spout, means for positively securing said nozzle tip to said spout to prohibit said nozzle tip from becoming separated from said spout during the extruding of said material from said barrel means, and a plunger means slidably mounted in said barrel for expressing said material therefrom by displacement of said plunger means relative to said barrel means.
Claim 9
Dependent Claim
33 words
A dental syringe as defined in claim 6 whereby said plunger means includes a means for relieving the back pressure on the material upon release of the pressure acting on said plunger means.
Claim 10
Dependent Claim
139 words
A dental syringe for incrementally dispensing a predetermined amount of material from a bulk supply directly from said bulk supply to a tooth comprising a means defining a holder, an elongated barrel, means for detachably connecting said barrel to said holder, said barrel including an elongated tubular member, said tubular member being opened at one end, a displaceable plug sealing said open end, and a spout connected to the other end of said tubular member, a plurality of flexible fingers connected to said other end of said tubular member, said fingers being circumferentially spaced about said spout, a disposable nozzle tip adapted to be detachably connected to said spout, complementary means formed on said fingers and said nozzle tip for securing said tip, and a plunger means slidably disposed in said barrel for effecting incremental displacement of said plug.
Claim 11
Dependent Claim
139 words
A dental syringe for incrementally dispensing a predetermined amount of material from a bulk supply directly from said bulk supply to a tooth comprising a means defining a holder, an elongated barrel, means for detachably connecting said barrel to said holder, said barrel including an elongated tubular member, said tubular member being opened at one end, a displaceable plug sealing said open end, and a spout connected to the other end of said tubular member, a plurality of flexible fingers connected to said other end of said tubular member, said fingers being circumferentially spaced about said spout, a disposable nozzle tip adapted to be detachably connected to said spout, complementary means formed on said fingers and said nozzle tip for securing said tip, and a plunger means slidably disposed in said barrel for effecting incremental displacement of said plug.
Claim 12
Dependent Claim
41 words
A dental syringe as defined in claim 8 wherein said holder means comprises a hub for detachably receiving said barrel, and a finger grip circumscribing said hub, and a spring means for normally biasing said plunger toward its normal inoperative position.
Claim 13
Dependent Claim
28 words
A dental syringe as defined in claim 9 and including means in said plunger for relieving the back pressure of said material to prohibit drooling of said material.
Claim 14
Dependent Claim
66 words
A dental syringe as defined in claim 10 wherein said means includes an annular groove formed in said plunger adjacent the end thereof, a vent slot communicating with said groove, and a sealing ring displaceably mounted in said groove for valving said vent slot between an opened position during an extruding stroke of said plunger and a closed position on the return stroke of said plunger.
Claim 15
Dependent Claim
86 words
A dental syringe as defined in claim 8 wherein said holder means comprises a hub for detachably receiving said barrel on one end thereof, a fixed handle member connected to the other end of said hub, and an actuating lever means pivotably connected to said fixed handle member, said lever means bearing on the end of said plunger whereby said plunger is displaced toward said barrel as said lever means is actuated, and a spring means for normally biasing said plunger means toward said lever means.
Claim 16
Dependent Claim
36 words
A dental syringe as defined in claim 12 wherein said plunger means comprises a pair of telescoping members, and said telescoping members having complementary means for effecting the extension and retraction thereof relative to one another.
Claim 17
Dependent Claim
70 words
A dental syringe as defined in claim 13 and including a pressure relief means adjacent one end of one of said telescoping members, said pressure relief means including an annular groove, a vent slot in communication with said groove, and a sealing ring displaceably disposed in said groove for valving said vent slot between open and closed position as said plunger means reciprocates within said barrel during a dispensing operation.
Claim 18
Dependent Claim
105 words
A dispensing syringe barrel for containing a bulk supply of dental material comprising an elongated tubular member which is opened at one end, said tubular member defining a reservoir for containing a bulk supply of material, a spout connected to the other end of said tubular member, a displaceable plug sealing said open end, a plurality of flexible fingers connected to the other end of said tubular member, said fingers being circumferentially spaced about said spout, a disposable nozzle tip fitted to said spout, and means for positively securing said nozzle tip to prohibit separation of said tip from said spout during a dispensing operation.
Claim 19
Dependent Claim
105 words
A dispensing syringe barrel for containing a bulk supply of dental material comprising an elongated tubular member which is opened at one end, said tubular member defining a reservoir for containing a bulk supply of material, a spout connected to the other end of said tubular member, a displaceable plug sealing said open end, a plurality of flexible fingers connected to the other end of said tubular member, said fingers being circumferentially spaced about said spout, a disposable nozzle tip fitted to said spout, and means for positively securing said nozzle tip to prohibit separation of said tip from said spout during a dispensing operation.
Claim 20
Dependent Claim
31 words
A dispensing syringe barrel as defined in claim 15 and including connecting means formed adjacent the open end of said tubular member adapted for connecting said tubular member to a holder.
Claim 21
Dependent Claim
22 words
A dispensing syringe barrel as defined in claim 15 wherein said fingers are integrally formed from the material of said tubular member.
Claim 22
Dependent Claim
39 words
A dispensing syringe barrel as defined in claim 15 wherein said last mentioned means include a notch formed on said fingers, and said nozzle tip having a laterally extending flange adapted to be releaseably retained by said finger notch.
Claim 23
Dependent Claim
26 words
A dispensing syringe barrel as defined in claim 18 wherein said flange extends laterally a progressively varying amount whereby said finger notches variably grip said flange.
Claim 24
Dependent Claim
29 words
A dispensing syringe barrel as defined in claim 19 and including a lock collar fitted onto said fingers for biasing said fingers into locking relationship with said tip flange.
Claim 25
Dependent Claim
18 words
A dispensing syringe barrel as defined in claim 20 and including an end cap for sealing said spout.
Claim 26
Dependent Claim
78 words
A dispensing syringe barrel for containing a bulk supply of dental material comprising an elongated tubular member which is open at one end, said tubular member defining a reservoir for containing a bulk supply of material, a spout connected to the other end of said tubular member, a displaceable plug for sealing said open end, and a plurality of flexible fingers connected to the other end of said tubular member, said fingers being circumferentially spaced about said spout.
Claim 27
Dependent Claim
78 words
A dispensing syringe barrel for containing a bulk supply of dental material comprising an elongated tubular member which is open at one end, said tubular member defining a reservoir for containing a bulk supply of material, a spout connected to the other end of said tubular member, a displaceable plug for sealing said open end, and a plurality of flexible fingers connected to the other end of said tubular member, said fingers being circumferentially spaced about said spout.
Claim 28
Dependent Claim
20 words
A dispensing barrel as defined in claim 22, and including a sealing cap for sealing the end of said spout.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |