US3906932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle point for stopper penetration and method of making it
Assignee: Becton Dickinson and Co
•
Filing: 1974-02-27
•
Granted: 1975-09-23
•
Expires: 1994-02-27
Abstract
Abstract A needle point particularly suited for insertion through a container stopper is not deflected to one side during penetration of the stopper. The needle is also non-coring during its passage through the stopper. The needle point has two diagonal faces instead of the usual one. The two faces are on opposite sides of the cannula body so that vector forces applied to each face during passage through a stopper are equal and opposite (therefore self-cancelling). During passage through the stopper, the needle continues in a straight path along the axial line of the needle without sideways deflection. The method of fabricating the new needle comprises (1) making a first diagonal grind on the cannula, (2) rotating the cannula 180* and making a second diagonal grind, and (3) bending the cannula wall tips to bring them together at the axial line.
Inventors
- 👤 Waldemar A Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:32
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/162; B; B21; B21G; B21G1/00; B21G1/08; A61M2205/00; A61M2205/19; A61M2205/192; A61M2205/195; A61M5/178; A61M5/31; A61M5/32; A61M5/3286; A61M5/329; A61M5/3291
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A stopper penetrating needle including a tubular portion having a stopper penetrating end, the end having two beveled faces 180* apart from each other and in converging relationship defining a pair of opposed tips, the tips being bent toward one another whereby the points of each tip are substantially adjacent one another but not united to provide a stopper penetrating pointed end being substantially free of lateral deflection and coring when inserted into the stopper.
Claim 2
Dependent Claim
75 words
A stopper penetrating needle including a tubular portion having a stopper penetrating end, the end having two beveled faces 180* apart from each other and in converging relationship defining a pair of opposed tips, the tips being bent toward one another whereby the points of each tip are substantially adjacent one another but not united to provide a stopper penetrating pointed end being substantially free of lateral deflection and coring when inserted into the stopper.
Claim 3
Dependent Claim
20 words
The invention in accordance with claim 1 wherein the points of the tips are bent into contact with one another.
Claim 4
Independent Claim
95 words
A method of producing a stopper penetrating needle with an end free of lateral deflection and coring when inserted into the stopper, including the steps of: a. providing a plurality of needle blanks essentially in tubular form each having a stopper penetrating end; b. grinding opposed convergent beveled faces in the tubular needle blanks at the stopper penetrating ends and thereby defining a pair of opposed pointed tips at this end; and c. bending the tips towards one another into substantial engagement but not united with one another to form the finished stopper penetrating end.
Claim 5
Independent Claim
95 words
A method of producing a stopper penetrating needle with an end free of lateral deflection and coring when inserted into the stopper, including the steps of: a. providing a plurality of needle blanks essentially in tubular form each having a stopper penetrating end; b. grinding opposed convergent beveled faces in the tubular needle blanks at the stopper penetrating ends and thereby defining a pair of opposed pointed tips at this end; and c. bending the tips towards one another into substantial engagement but not united with one another to form the finished stopper penetrating end.
Claim 6
Dependent Claim
63 words
The invention in accordance with claim 3 wherein the needle blanks are pressed between two rigid plates relatively movable in a lateral direction with respect to one another and in forming the beveled faces the needle blanks are rotated about their respective axes 180* to permit a grinding wheel to pass twice over the needle blank ends to form the two beveled faces.
Claim 7
Dependent Claim
49 words
The invention in accordance with claim 4 wherein the pressed needle blanks are moved 90* about their respective axes through the relative lateral reciprocation of the plates to thereby expose the needle blank ends with beveled faces to a pair of bevel-faced squeeze bars for bending the pointed tips.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |