Patent US5284476A successfully refreshed from Google Patents.
US5284476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear hydrolysis cannula
Assignee: Individual
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Filing: 1992-03-20
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Granted: 1994-02-08
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Expires: 2012-03-20
Abstract
Abstract A cannula for use in cataract surgery during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation is described. The cannula has a hub for mating with a syringe and a needle originating from the distal end of the hub. The needle comprises a first section, second section, and truncated surface. The first section originates from the distal end of the hub and extends forward in a plane delineating the central longitudinal axis of the cannula. The second section originates from the distal end of the first section and is flattened and curved away from the central longitudinal axis of the hub. The truncated surface of the needle forms a rounded tip with beveled surfaces. The intersection of the bevel and sides of the cannula are sharpened to provide a cutting edge.
Inventors
- 👤 Paul S. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
136 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, and said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip.
Claim 2
Dependent Claim
136 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, and said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip.
Claim 3
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 1, wherein said second section has a flattened surface extending along its length.
Claim 4
Dependent Claim
22 words
The nuclear hydrolysis cannula of claim 1 wherein said hub at said proximal end is configured to mate with a standard syringe.
Claim 5
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 3, wherein said hub at said proximal end includes a female luer-look fitting.
Claim 6
Dependent Claim
47 words
The nuclear hydrolysis cannula of claim 1, wherein said first section extends outwardly from said distal end of said hub portion approximately 8.00 mm, and said needle from said distal end of said hub portion to said second end has an axial length of approximately 20.00 mm.
Claim 7
Dependent Claim
20 words
The nuclear hydrolysis cannula of claim 1, wherein said second section has a radius of curvature of approximately 19.00 mm.
Claim 8
Dependent Claim
23 words
The nuclear hydrolysis cannula of claim 6, wherein said second end is disposed a distance of approximately 5.00 mm from said longitudinal axis.
Claim 9
Dependent Claim
34 words
The nuclear hydrolysis cannula of claim 1, wherein said second section of said needle has a curvature which defines with said first section a concave aspect which is directed away from said longitudinal axis.
Claim 10
Dependent Claim
18 words
The nuclear hydrolysis cannula of claim 1, wherein said beveled surface is directed away from said longitudinal axis.
Claim 11
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 9, wherein said second section has a flattened surface extending along its length.
Claim 12
Dependent Claim
201 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip, said first section extending outwardly from said distal end of said hub portion approximately 8.00 mm, said needle from said distal end of said hub portion to said second end having an axial length of approximately 20.00 mm, said second section having a radius of curvature of approximately 19.00 mm, and said second end being disposed a distance of approximately 5.00 mm from said longitudinal axis.
Claim 13
Dependent Claim
201 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip, said first section extending outwardly from said distal end of said hub portion approximately 8.00 mm, said needle from said distal end of said hub portion to said second end having an axial length of approximately 20.00 mm, said second section having a radius of curvature of approximately 19.00 mm, and said second end being disposed a distance of approximately 5.00 mm from said longitudinal axis.
Claim 14
Dependent Claim
18 words
The nuclear hydrolysis cannula of claim 11, wherein said second section has flattened surface extending along its length.
Claim 15
Dependent Claim
22 words
The nuclear hydrolysis cannula of claim 11, wherein said hub at said proximal end is configured to mate with a standard syringe.
Claim 16
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 13, wherein said hub at said proximal end includes a female luer-lock fitting.
Claim 17
Dependent Claim
34 words
The nuclear hydrolysis cannula of claim 11, wherein said second section of said needle has a curvature which defines with said first section a concave aspect which is directed away from said longitudinal axis.
Claim 18
Dependent Claim
18 words
The nuclear hydrolysis cannula of claim 11, wherein said beveled surface is directed away from said longitudinal axis.
Claim 19
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 16, wherein said second section has a flattened surface extending along its length.
Claim 20
Dependent Claim
137 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section having a curvature which defines with said first section a concave aspect which is directed away from said longitudinal axis, and said second end being truncated to define a beveled surface and having a sharpened edge with a rounded tip.
Claim 21
Dependent Claim
137 words
A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising: a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section having a curvature which defines with said first section a concave aspect which is directed away from said longitudinal axis, and said second end being truncated to define a beveled surface and having a sharpened edge with a rounded tip.
Claim 22
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 18, wherein said second section has a flattened surface extending along its length.
Claim 23
Dependent Claim
22 words
The nuclear hydrolysis cannula of claim 18 wherein said hub at said proximal end is configured to mate with a standard syringe.
Claim 24
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 20, wherein said hub at said proximal end includes a female luer-lock fitting.
Claim 25
Dependent Claim
47 words
The nuclear hydrolysis cannula of claim 18, wherein said first section extends outwardly from said distal end of said hub portion approximately 8.00 mm, and said needle from said distal end of said hub portion to said second end has an axial length of approximately 20.00 mm.
Claim 26
Dependent Claim
20 words
The nuclear hydrolysis cannula of claim 18, wherein said second section has a radius of curvature of approximately 19.00 mm.
Claim 27
Dependent Claim
23 words
The nuclear hydrolysis cannula of claim 23, wherein said second end is disposed a distance of approximately 5.00 mm from said longitudinal axis.
Claim 28
Dependent Claim
18 words
The nuclear hydrolysis cannula of claim 18, wherein said beveled surface is directed away from said longitudinal axis.
Claim 29
Dependent Claim
19 words
The nuclear hydrolysis cannula of claim 25, wherein said second section has a flattened surface extending along its length.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |