US4781691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepped needle
Assignee: Becton Dickinson and Co
•
Filing: 1987-07-17
•
Granted: 1988-11-01
•
Expires: 2007-07-17
Abstract
Abstract A stepped needle comprising, a proximal hollow hub, a first elongated tubular portion extending from the hub of a first larger diameter, and a second elongated tubular end portion located distal the first tubular portion of a second smaller diameter.
Inventors
- 👤 James R. Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:09
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3401
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A stepped needle, comprising: a proximal hollow hub; a first elongated tubular portion extending from the hub of a first larger diameter; and a second elongated tubular end portion located distal the first tubular portion of a second smaller diameter, with the outer diameter of the seciond tubular portion being in the range of 0.018 to 0.025 inches, and the respective inner diameter of the second tubular portion being in the range of 0.010 to 0.017 inches.
Claim 2
Dependent Claim
77 words
A stepped needle, comprising: a proximal hollow hub; a first elongated tubular portion extending from the hub of a first larger diameter; and a second elongated tubular end portion located distal the first tubular portion of a second smaller diameter, with the outer diameter of the seciond tubular portion being in the range of 0.018 to 0.025 inches, and the respective inner diameter of the second tubular portion being in the range of 0.010 to 0.017 inches.
Claim 3
Dependent Claim
19 words
The needle of claim 1 wherein the second tubular end portion has a bevel at the distal end thereof.
Claim 4
Dependent Claim
20 words
The needle of claim 1 including an intermediate portion tapered from the first tubular portion to the second tubular portion.
Claim 5
Dependent Claim
23 words
The needle of claim 1 wherein the length of the second tubular portion is in the range of approximately 1/4 to 3/4 inches.
Claim 6
Dependent Claim
24 words
The needle of claim 1 wherein the outer diameter of the first tubular portion is in the range of approximately 0.025 to 0.050 inches.
Claim 7
Dependent Claim
25 words
The needle of claim 5 wherein the respective inner diameter of the first tubular portion is in the range of approximately 0.017 to 0.042 inches.
Claim 8
Dependent Claim
19 words
The needle of claim 1 wherein the length of the first and second tubular portions is approximately 31/2 inches.
Claim 9
Dependent Claim
49 words
The needle of claim 1 including an intermediate tubular portion connected between the first tubular portion and second tubular portion, said intermediate tubular portion having an outer diameter less than the outer diameter of the first tubular portion and greater than the outer diameter of the second tubular portion.
Claim 10
Dependent Claim
33 words
The needle of claim 8 wherein the intermediate portion has an inner diameter less than the inner diameter of the first tubular portion and greater than the inner diameter of the second portion.
Claim 11
Dependent Claim
39 words
The needle of claim 1 including a catheter for placement through the first and second tubular portions, said catheter having an outer diameter of at least approximately 0.002 inches less than the inner diameter of the second tubular portion.
Claim 12
Dependent Claim
16 words
The needle of claim 11 wherein the catheter has a wall thickness of approximately 0.0015 inches.
Claim 13
Dependent Claim
18 words
The needle of claim 1 including a threading device having a hollow tubular section received in the hub.
Claim 14
Dependent Claim
101 words
A stepped needle, comprising: a proximal hollow hub; a first elongated tubular portion extending from the hub of a first larger diameter; and a second elongated tubular end portion located distal the first tubular portion of a second smaller diameter, with the outer diameter of the second tubular portion being in the range of approximately 0.018 to 0.025 inches, and the respective inner diameter of the second tubular portion being in the range of approximately 0.010 to 0.017 inches, including a stylet having an elongated rod having an outer diameter approximately equal to the inner diameter of the second tubular portion.
Claim 15
Dependent Claim
101 words
A stepped needle, comprising: a proximal hollow hub; a first elongated tubular portion extending from the hub of a first larger diameter; and a second elongated tubular end portion located distal the first tubular portion of a second smaller diameter, with the outer diameter of the second tubular portion being in the range of approximately 0.018 to 0.025 inches, and the respective inner diameter of the second tubular portion being in the range of approximately 0.010 to 0.017 inches, including a stylet having an elongated rod having an outer diameter approximately equal to the inner diameter of the second tubular portion.
Claim 16
Dependent Claim
22 words
The needle of claim 10 wherein the rod has an outer diameter less than the inner diameter of the first tubular portion.
Claim 17
Dependent Claim
23 words
The needle of claim 10 wherein the rod has an outer diameter approximately equal to the inner diameter of the first tubular portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |