US4993941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental irrigating needle
Assignee: Nipro Corp
•
Filing: 1988-04-29
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Granted: 1991-02-19
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Expires: 2008-04-29
Abstract
Abstract A dental irrigation needle includes a hub engagable with a syringe and a cannula having one closed end and another end fitted to the hub, the cannula being formed of a freely bendable material such as annealed stainless steel. One or more nozzle orifices are formed in a lateral wall of the cannula adjacent the closed end so that a fluid from the syringe may be discharged through the nozzle orifices during the irrigation of a reamed root canal. The orifices are mutually axially and circumferentially spaced along the cannula and a marking may be provided on the hub to indicate a direction of each of the nozzle openings.
Inventors
- 👤 Eikichi Maita
- 👤 Kohji Ikeda
- 👤 Akira Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:00
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/02; A61C5/00; A61C5/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A dental irrigation needle comprising: a hub having means engageable with a syringe; a cannula having one closed end and another end fitted to the hub, said cannula being formed of a freely bendable annealed stainless steel, whereby said cannula may be bent to a desired angle and will maintain the bent angle in the absence of a restoring force; and at least one nozzle orifice formed in a lateral wall of said cannula adjacent said one end, whereby a fluid from a syringe may be discharged through said nozzle orifice.
Claim 2
Dependent Claim
91 words
A dental irrigation needle comprising: a hub having means engageable with a syringe; a cannula having one closed end and another end fitted to the hub, said cannula being formed of a freely bendable annealed stainless steel, whereby said cannula may be bent to a desired angle and will maintain the bent angle in the absence of a restoring force; and at least one nozzle orifice formed in a lateral wall of said cannula adjacent said one end, whereby a fluid from a syringe may be discharged through said nozzle orifice.
Claim 3
Dependent Claim
25 words
The needle of claim 1 including at least two of said nozzle orifices, said nozzle orifices being mutually axial and circumferentially spaced along said cannula.
Claim 4
Dependent Claim
14 words
The needle of claim 2 including two diametrically opposed ones of said nozzle orifices.
Claim 5
Dependent Claim
23 words
The needle of claim 1 including a marking on said hub indicating a direction of each of said at least one nozzle orifices.
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |