US5470327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pointed adapter for blunt entry device
Assignee: Hospira Inc
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Filing: 1994-09-20
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Granted: 1995-11-28
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Expires: 2014-09-20
Abstract
Abstract The present invention relates to a pointed adapter which enables a blunt entry device such as a blunt cannula to readily penetrate an elastomeric closure such as a conventional vial stopper. The adapter also includes a collar which initially protects the adapter point from touch contamination and from accidental stick to the user.
Inventors
- 👤 R. Hayes Helgren
- 👤 David E. Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/14; A61J1/20; A61J1/2089; A61J1/2096; A61J1/2003; A61J1/2006; A61J1/201; A61J2200/00; A61J2200/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
161 words
A piercing member constructed and arranged for use with an associated blunt end of a hollow bore cannula to pierce an elastomeric closure, the piercing member comprising: an annular collar having a generally cylindrical outside surface, a hollow rearward extending portion having a first inside diameter wall surface constructed and arranged for an interference fit around the blunt end of the cannula, and a hollow forward extending portion having a second inside diameter wall surface having an end constructed and arranged to abut the closure, the diameter of the first inside wall surface being less than the diameter of the second inside wall surface; a detachable piercing element concentrically positioned within the second inside wall surface of the annular collar and having a conical portion oriented axially forward within the forward portion of the collar and abase portion within the rearward portion of the collar; and a frangible connection for detachably connecting the piercing element to the first inside wall surface.
Claim 2
Dependent Claim
161 words
A piercing member constructed and arranged for use with an associated blunt end of a hollow bore cannula to pierce an elastomeric closure, the piercing member comprising: an annular collar having a generally cylindrical outside surface, a hollow rearward extending portion having a first inside diameter wall surface constructed and arranged for an interference fit around the blunt end of the cannula, and a hollow forward extending portion having a second inside diameter wall surface having an end constructed and arranged to abut the closure, the diameter of the first inside wall surface being less than the diameter of the second inside wall surface; a detachable piercing element concentrically positioned within the second inside wall surface of the annular collar and having a conical portion oriented axially forward within the forward portion of the collar and abase portion within the rearward portion of the collar; and a frangible connection for detachably connecting the piercing element to the first inside wall surface.
Claim 3
Dependent Claim
39 words
The piercing member of claim 1 wherein the annular collar is initially a separate part and the detachable piercing element is initially a separate part and the frangible connection is a mechanically joined connection of the two separate parts.
Claim 4
Dependent Claim
34 words
The piercing member of claim 1 wherein the frangible connection is a thin annular sleeve axially extending between the detachable piercing element and the inside wall surface of the rearward portion of the collar.
Claim 5
Dependent Claim
26 words
The piercing member of claim 3 wherein the base portion is a cylindrical stern constructed and arranged to fit within the hollow bore of the cannula.
Claim 6
Dependent Claim
25 words
The piercing member of claim 4 wherein the piercing element includes a radial shoulder at the juncture of the conical portion and the base portion.
Claim 7
Dependent Claim
17 words
The piercing member of claim 5 wherein the radial shoulder includes radial passageways for longitudinal fluid flow.
Claim 8
Dependent Claim
26 words
The piercing member of claim 5 wherein the conical portion of the piercing element increases in diameter from a conical tip point to the radial shoulder.
Claim 9
Dependent Claim
28 words
The piercing member of claim 7 wherein the conical portion has an outer diameter which is greater than the outer diameter of the blunt end of the cannula.
Claim 10
Dependent Claim
155 words
A cannula assembly constructed and arranged to pierce a stopper, comprising: a cannula hub having a first and second end, the first end constructed and arranged for fluid flow connection; a cannula extending from the second end of the hub and terminating in a blunt end; a flow passageway through the cannula for fluid communication between the first end of the hub and the blunt end of the cannula; a disposable piercing member including: an annular collar having a rearward end constructed and arranged for an interference fit around the blunt end of the cannula and a forward extending end constructed and arranged for abutment with the stopper; a piercing member concentrically positioned within the annular collar and having a pointed tip orientated forward within the forward end of the collar and a base portion within the rearward end of the collar; and a frangible connection circumferentially connecting the annular collar and the piercing member.
Claim 11
Dependent Claim
155 words
A cannula assembly constructed and arranged to pierce a stopper, comprising: a cannula hub having a first and second end, the first end constructed and arranged for fluid flow connection; a cannula extending from the second end of the hub and terminating in a blunt end; a flow passageway through the cannula for fluid communication between the first end of the hub and the blunt end of the cannula; a disposable piercing member including: an annular collar having a rearward end constructed and arranged for an interference fit around the blunt end of the cannula and a forward extending end constructed and arranged for abutment with the stopper; a piercing member concentrically positioned within the annular collar and having a pointed tip orientated forward within the forward end of the collar and a base portion within the rearward end of the collar; and a frangible connection circumferentially connecting the annular collar and the piercing member.
Claim 12
Dependent Claim
26 words
The cannula assembly according to claim 9 wherein the frangible connection is a thin annular sleeve axially extending between the piercing member and the annular collar.
Claim 13
Dependent Claim
16 words
The cannula assembly according to claim 9 wherein the frangible connection is a mechanically joined connection.
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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) | 1998-11-27 | 1999-05-29 | 1999-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-27 | 2003-05-29 | 2003-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-27 | 2007-05-29 | 2007-11-28 | $7700.00 | Window Closed / Lapsed |