US4551135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe for extrusion of semi-plastic material
Assignee: STWB Inc
•
Filing: 1982-05-19
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Granted: 1985-11-05
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Expires: 2002-05-19
Abstract
Abstract The invention comprises a syringe for extrusion of a semi-plastic mass, or a mass having a paste-like consistency. In a preferred embodiment, the syringe is so-designed to permit mixing of two components of a plasticizable mixture within the syringe barrel. The bore of the syringe barrel is flared to facilitate extrusion of the plastic mass therefrom. The parts of the syringe ready for use are packaged in a one-piece tray which serves not only for shipping and storing of the syringe, which may be preloaded with one of the components of the plasticizable mixture, together with the associated syringe parts, but which also serves, when opened for use, as a convenient tray for handling the syringe while mixing the two components of the plasticizable mixture prior to extrusion.
Inventors
- 👤 William G. Gorman
- 👤 David A. Byron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8816; A61B17/8825; A61B17/8827; A61C; A61C19/00; A61C19/02; A61C5/00; A61C5/60; A61C5/62; A61C8/00; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4601; A61M; A61M5/00; B; B05; B05C; B05C17/00; B05C17/005; B05C17/00593; A61B17/8833; A61B2017/8838; A61B50/00; A61B2050/005; A61B2050/0065; A61B50/30; A61B50/33; A61M5/002
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
86 words
A mixing/dispensing syringe for use in the extrusion of a wetted, semi-plastic mass which comprises in combination: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel and providing a seal therebetween and the inside wall of the barrel along its entire length, and C. a plunger rod removably attached to said piston, wherein the bore of said barrel is slightly flared from its upper to its lower end.
Claim 2
Dependent Claim
86 words
A mixing/dispensing syringe for use in the extrusion of a wetted, semi-plastic mass which comprises in combination: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel and providing a seal therebetween and the inside wall of the barrel along its entire length, and C. a plunger rod removably attached to said piston, wherein the bore of said barrel is slightly flared from its upper to its lower end.
Claim 3
Dependent Claim
20 words
A syringe according to claim 1 which includes a finger grip affixed to the upper end of said syringe barrel.
Claim 4
Dependent Claim
18 words
A syringe according to claim 2 which includes means for sealing the lower end of the syringe barrel.
Claim 5
Dependent Claim
16 words
A syringe according to claim 3 wherein said sealing means comprises a removable adapter and plug.
Claim 6
Dependent Claim
23 words
A syringe according to claim 4 wherein said plunger rod is attachable to the upper end of said piston by a screw-threaded connection.
Claim 7
Dependent Claim
25 words
A syringe according to claim 4 wherein said plunger rod is attachable to the upper end of said piston by a ball and socket connection.
Claim 8
Dependent Claim
23 words
A syringe according to claim 4 wherein said plunger rod is attachable to the upper end of said piston by a bayonet connection.
Claim 9
Dependent Claim
24 words
A syringe according to claim 5 wherein said piston is provided with two shoulders for frictional engagement with the inside wall of said barrel.
Claim 10
Dependent Claim
24 words
A syringe according to claim 5 wherein said piston is provided with one shoulder for frictional engagement with the inside wall of said barrel.
Claim 11
Dependent Claim
20 words
A syringe according to claim 8 wherein the syringe is provided with means for venting air from the syringe barrel.
Claim 12
Dependent Claim
16 words
A syringe according to claim 10 wherein said vent means comprises a hole through said piston.
Claim 13
Dependent Claim
21 words
A syringe according to claim 11 wherein said sealing means includes means for inter-connecting a second syringe to said mixing/dispensing syringe.
Claim 14
Dependent Claim
14 words
A syringe according to claim 12 wherein said inter-connecting means comprises a LUER® joint.
Claim 15
Dependent Claim
31 words
A syringe according to claim 8 wherein the flare of the bore of said barrel is from 0.015 to 0.05 inch over a barrel length of from 3 to 4 inches.
Claim 16
Dependent Claim
26 words
A syringe according to claim 14 wherein the flare of the bore of said barrel is 0.025 inch over a barrel length of about 3.5 inches.
Claim 17
Dependent Claim
18 words
A syringe according to claim 15 wherein said barrel is pre-loaded with one component of a plasticizable mixture.
Claim 18
Dependent Claim
13 words
A syringe according to claim 16 wherein said pre-loaded component is a solid.
Claim 19
Dependent Claim
15 words
A syringe according to claim 17 wherein said solid component is a powdered ceramic material.
Claim 20
Dependent Claim
13 words
A syringe according to claim 18 wherein said powdered ceramic material is hydroxylapatite.
Claim 21
Dependent Claim
18 words
A syringe according to claim 18 wherein said powdered ceramic material is a mixture of hydroxylapatite and whitlockite.
Claim 22
Dependent Claim
24 words
A syringe according to claim 19 wherein the barrel thereof has indicia for determining the amount and the rate of extrusion of material therefrom.
Claim 23
Dependent Claim
32 words
A syringe according to claim 21 adapted for use in combination with an attachment to effect a measured and predetermined extrusion rate, said attachment comprising a ratchet inter-connection with the syringe plunger.
Claim 24
Dependent Claim
131 words
A package for shipping and storing a mixing/dispensing syringe for use in the extrusion of a wetted, semi-plastic mass, composed of a plasticizable mixture of two or more components, which comprises: I. a thermoformed plastic tray which is sealed over its open upper face by II. a cover sheet, wherein said tray contains III. a mixing/dispensing syringe which comprises in combination: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel, and providing a seal therebetween and the inside wall of the barrel along its entire length, and C. a plunger rod for removable attachment to said piston, wherein the bore of said barrel is slightly flared from its upper to its lower end.
Claim 25
Dependent Claim
131 words
A package for shipping and storing a mixing/dispensing syringe for use in the extrusion of a wetted, semi-plastic mass, composed of a plasticizable mixture of two or more components, which comprises: I. a thermoformed plastic tray which is sealed over its open upper face by II. a cover sheet, wherein said tray contains III. a mixing/dispensing syringe which comprises in combination: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel, and providing a seal therebetween and the inside wall of the barrel along its entire length, and C. a plunger rod for removable attachment to said piston, wherein the bore of said barrel is slightly flared from its upper to its lower end.
Claim 26
Dependent Claim
18 words
A package according to claim 23 wherein said barrel is pre-loaded with one component of a plasticizable mixture.
Claim 27
Dependent Claim
13 words
A package according to claim 24 wherein said pre-loaded component is a solid.
Claim 28
Dependent Claim
15 words
A package according to claim 25 wherein said solid component is a powdered ceramic material.
Claim 29
Dependent Claim
13 words
A package according to claim 26 wherein said powdered ceramic material is hydroxylapatite.
Claim 30
Dependent Claim
18 words
A package according to claim 26 wherein said powdered ceramic material is a mixture of hydroxylapatite and whitlockite.
Claim 31
Dependent Claim
26 words
A package according to claim 27 wherein the barrel of said syringe has indicia for determining the amount and the rate of extrusion of material therefrom.
Claim 32
Dependent Claim
36 words
A package according to claim 29 wherein said syringe is adapted for use in combination with an attachment to effect a measured and predetermined extrusion rate, said attachment comprising a ratchet inter-connection with the syringe plunger.
Claim 33
Dependent Claim
80 words
A mixing/dispensing syringe in combination with a wetted, semi-plastic mass which comprises: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel and providing a seal therebetween and the inside wall of the barrel along its entire length and C. a plunger rod removably attached to said piston wherein the bore of said barrel is flared from its upper to its lower end.
Claim 34
Dependent Claim
80 words
A mixing/dispensing syringe in combination with a wetted, semi-plastic mass which comprises: A. a barrel of generally uniform wall thickness which is closed at its upper end by B. a flexible piston slidable within the bore of said barrel and providing a seal therebetween and the inside wall of the barrel along its entire length and C. a plunger rod removably attached to said piston wherein the bore of said barrel is flared from its upper to its lower end.
Claim 35
Dependent Claim
21 words
A mixing/dispensing syringe according to claim 31 wherein said semi-plastic mass comprises a particulate ceramic material and a physiologically compatible liquid.
Claim 36
Dependent Claim
14 words
A mixing/dispensing syringe according to claim 32 wherein the particulate ceramic material comprises hydroxylapatite.
Claim 37
Dependent Claim
14 words
A mixing/dispensing syringe according to claim 33 wherein the physiologically compatible liquid comprises blood.
Claim 38
Dependent Claim
14 words
A mixing/dispensing syringe according to claim 33 wherein the physiologically compatible liquid comprises saline.
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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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |