US5911705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One step catheter advancement automatic needle retraction system
Assignee: Becton Dickinson and Co
•
Filing: 1998-05-08
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Granted: 1999-06-15
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Expires: 2018-05-08
Abstract
Abstract The one step catheter advancement automatic needle retraction system of this invention includes a generally hollow barrel, a needle hub which can include a flashback chamber disposed in the barrel, a secondary flashback chamber disposed in the barrel, a biasing mechanism for retracting the needle into the barrel and a clip associated with the secondary flashback chamber for engaging a catheter hub. The needle hub in conjunction with the secondary flashback chamber retain the needle in the extended position against the force of the biasing mechanism until the catheter has been advanced a certain distance from the distal end of the barrel.
Inventors
- 👤 Glade H. Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:46
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61M25/0612; A61M25/0631; A61M25/0693; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/322; A61M5/3221; A61M2005/3223; A61M2005/3226; A61M5/3232
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
261 words
A catheter and needle introducer assembly, comprising: a barrel defining a barrel lumen and having a proximal end and a distal end with an opening therein; a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub affixed to the proximal end of the needle and disposed in the barrel lumen; at least one flexible arm affixed to the needle hub such that in a first position the flexible arm engages the barrel and the sharp distal tip of the needle extends distally of the distal end of the barrel through the opening coaxially within the catheter; a spring having a proximal end and a distal end, the spring engaging the barrel and the needle hub to urge the needle hub toward the proximal end of the barrel; and a chamber separate from and movable with respect to the needle hub and the barrel disposed inside the distal portion of the needle hub and coaxially about the needle, the chamber having a proximal portion and a distal portion with the proximal portion having a smaller outer diameter than the distal portion so in the first position the distal portion is adjacent to the flexible arm to urge the flexible arm into engagement with the barrel and in a second position the proximal portion is adjacent to the flexible arm and allows the flexible arm to move out of engagement with the barrel.
Claim 2
Dependent Claim
261 words
A catheter and needle introducer assembly, comprising: a barrel defining a barrel lumen and having a proximal end and a distal end with an opening therein; a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub affixed to the proximal end of the needle and disposed in the barrel lumen; at least one flexible arm affixed to the needle hub such that in a first position the flexible arm engages the barrel and the sharp distal tip of the needle extends distally of the distal end of the barrel through the opening coaxially within the catheter; a spring having a proximal end and a distal end, the spring engaging the barrel and the needle hub to urge the needle hub toward the proximal end of the barrel; and a chamber separate from and movable with respect to the needle hub and the barrel disposed inside the distal portion of the needle hub and coaxially about the needle, the chamber having a proximal portion and a distal portion with the proximal portion having a smaller outer diameter than the distal portion so in the first position the distal portion is adjacent to the flexible arm to urge the flexible arm into engagement with the barrel and in a second position the proximal portion is adjacent to the flexible arm and allows the flexible arm to move out of engagement with the barrel.
Claim 3
Dependent Claim
19 words
The catheter and needle introducer assembly of claim 1 wherein the chamber includes a marker on the distal portion.
Claim 4
Dependent Claim
36 words
The catheter and needle introducer assembly of claim 1 further comprising a movable clip disposed in the chamber and adjacent to the distal end of the chamber for releasably securing the catheter hub to the chamber.
Claim 5
Dependent Claim
29 words
The catheter and needle introducer assembly of claim 3 wherein the clip defines an opening therethrough through which the needle extends and a hook portion engaging the catheter hub.
Claim 6
Dependent Claim
19 words
The catheter and needle introducer assembly of claim 4 wherein the chamber includes a marker on the distal portion.
Claim 7
Dependent Claim
24 words
The catheter and needle introducer assembly of claim 1 wherein the flexible arm includes a radially extending portion with an angled outer proximal surface.
Claim 8
Dependent Claim
28 words
The catheter and needle introducer assembly of claim 6 wherein the angled outer proximal surface is at an angle of between about 30 degrees and about 45 degrees.
Claim 9
Dependent Claim
36 words
The catheter and needle introducer assembly of claim 6 further comprising a movable clip disposed in the chamber and adjacent to the distal end of the chamber for releasably securing the catheter hub to the chamber.
Claim 10
Dependent Claim
25 words
The catheter and needle introducer assembly of claim 8 wherein the clip defines an opening therethrough, a hook portion and at least one protrusion thereon.
Claim 11
Dependent Claim
24 words
The catheter and needle introducer assembly of claim 9 wherein the chamber includes a marker on the distal portions adjacent to the proximal portions.
Claim 12
Dependent Claim
135 words
A catheter and needle introducer assembly, comprising: a barrel defining a barrel lumen and having a proximal end and a distal end with an opening therein; a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub defining a flashback chamber affixed to the proximal end of the needle; a means engaging the barrel and the needle hub for biasing the needle hub toward the proximal end of the barrel; a means for retaining the needle hub adjacent to the distal end of the barrel; and a means for allowing the means for biasing to force the needle hub toward the proximal end of the barrel.
Claim 13
Dependent Claim
135 words
A catheter and needle introducer assembly, comprising: a barrel defining a barrel lumen and having a proximal end and a distal end with an opening therein; a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub defining a flashback chamber affixed to the proximal end of the needle; a means engaging the barrel and the needle hub for biasing the needle hub toward the proximal end of the barrel; a means for retaining the needle hub adjacent to the distal end of the barrel; and a means for allowing the means for biasing to force the needle hub toward the proximal end of the barrel.
Claim 14
Dependent Claim
81 words
A catheter and needle introducer assembly, comprising: a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub affixed to the proximal end of the needle; a needle shield disposed between the needle hub and the catheter hub; and a clip operatively connected to the needle shield and engaging the catheter hub.
Claim 15
Dependent Claim
81 words
A catheter and needle introducer assembly, comprising: a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle disposed in the catheter and having a sharp distal tip and a proximal end; a needle hub affixed to the proximal end of the needle; a needle shield disposed between the needle hub and the catheter hub; and a clip operatively connected to the needle shield and engaging the catheter hub.
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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) | 2002-06-14 | 2002-12-14 | 2003-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-14 | 2006-12-14 | 2007-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-14 | 2010-12-14 | 2011-06-15 | $7700.00 | Window Closed / Lapsed |