US4637388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracheal tube obturator with reversible tip
Assignee: Smiths Medical ASD Inc
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Filing: 1984-10-15
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Granted: 1987-01-20
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Expires: 2004-10-15
Abstract
Abstract An obturator especially for use as a part of a tracheal tube assembly permits the tracheal tube to have a squared off, unbeveled, distal end with an annular, circular rim of predetermined diameter which easily passes through the vocal cords. The obturator has a soft, flexible tip of generally conical configuration with a blunt, rounded apex and a truncated conical flexible trailing skirt with an outer diameter greater than the outer diameter of the tube rim to shield it during insertion and permit smooth tube entry. The skirt folds, or inverts, toward the apex to enable withdrawal of the obturator through the bore of the tube. The distal end of the metallic rod of the obturator is swaged and pierced and the soft tip is molded thereon to assure against dislodgement.
Inventors
- 👤 Clifford P. Melendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:46
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0488; A61M16/0402; A61M16/0429; A61M2205/00; A61M2205/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
A tracheal tube assembly comprising: a tracheal tube having a proximal end, an elongated bore of uniform diameter, and a distal end, said distal end terminating in an opening with an annular rim of predetermined outer diameter; and an obturator normally sleeved within the bore of said tube, but withdrawable therefrom, said obturator having a proximal end forming a handle, an elongated shank and a distal end with a soft, flexible, conical tip, mounting thereon and normally projecting from said tube opening and having an outer diameter at least equal to the outer diameter of said rim to shield, and cover the same during insertion of said assembly between the vocal cords; said soft tip being of resilient deformable material so as to be withdrawable through the bore of said tube with said obturator; said soft, flexible conical tip includes a blunt rounded leading apex of predetermined length and an integral trailing hollow skirt, of truncated conical configuration, said skirt being substantially equal in length to said apex and invertible toward said apex upon withdrawing of said obturator through said bore to reduce the diameter of said tip.
Claim 2
Dependent Claim
188 words
A tracheal tube assembly comprising: a tracheal tube having a proximal end, an elongated bore of uniform diameter, and a distal end, said distal end terminating in an opening with an annular rim of predetermined outer diameter; and an obturator normally sleeved within the bore of said tube, but withdrawable therefrom, said obturator having a proximal end forming a handle, an elongated shank and a distal end with a soft, flexible, conical tip, mounting thereon and normally projecting from said tube opening and having an outer diameter at least equal to the outer diameter of said rim to shield, and cover the same during insertion of said assembly between the vocal cords; said soft tip being of resilient deformable material so as to be withdrawable through the bore of said tube with said obturator; said soft, flexible conical tip includes a blunt rounded leading apex of predetermined length and an integral trailing hollow skirt, of truncated conical configuration, said skirt being substantially equal in length to said apex and invertible toward said apex upon withdrawing of said obturator through said bore to reduce the diameter of said tip.
Claim 3
Dependent Claim
28 words
A tracheal tube assembly as specified in claim 1 wherein: the distal end of said tube having an annular rim which is squared off and free of bevel.
Claim 4
Dependent Claim
34 words
A tracheal tube assembly as specified in claim 1 wherein: said obturator is a normally straight rod of easily bendable metallic material, deformable into a curve and withdrawable from said tube when so curved.
Claim 5
Dependent Claim
75 words
A tracheal tube assembly as specified in claim 1 wherein: said obturator is a bendable metallic rod, covered with thermoplastic sheathing and having at least one pierced hole at the distal end thereof; and said soft tip is molded on the distal end of said rod, with its material anchored in said pierced hole and with an integral tube extending rearwardly therefrom and molded around said rod; whereby inadvertent dislodging of said tip is avoided.
Claim 6
Dependent Claim
112 words
An obturator for use in an indwelling device such as a tracheal tube, said obturator comprising: an elongated rod of bendable metal having a proximal end a handle and having a distal end forming a soft tip mounted on the distal end of said rod and being of conical outer configuration with a blunt, rounded apex, of predetermined axial length, and an integral, truncated conical hollow skirt, said skirt being substantially equal in axial length to said apex and of predetermined outer diameter, at least equal to the outer diameter of the indwelling device with which used, and being invertible toward said apex for withdrawing through the bore of any such device.
Claim 7
Dependent Claim
112 words
An obturator for use in an indwelling device such as a tracheal tube, said obturator comprising: an elongated rod of bendable metal having a proximal end a handle and having a distal end forming a soft tip mounted on the distal end of said rod and being of conical outer configuration with a blunt, rounded apex, of predetermined axial length, and an integral, truncated conical hollow skirt, said skirt being substantially equal in axial length to said apex and of predetermined outer diameter, at least equal to the outer diameter of the indwelling device with which used, and being invertible toward said apex for withdrawing through the bore of any such device.
Claim 8
Dependent Claim
146 words
An obturator comprising: an elongated rod having a handle at one end and a flexible tip mounted on the other end, said tip being of conical configuration with a blunt rounded apex, a hollow integral, truncated conical skirt normally forming part of said conical configuration but being foldable and invertible toward said apex for withdrawal through a passage; said rod is of aluminum and is enclosed in a sheathing of thermoplastic, said rod being normally straight for shipment, but bendable into a curve when in use in a curved tracheal tube; said rod includes a distal end which is swaged flatwise and pierced with a hole; and said tip includes an integral hollow tube extending rearwardly therefrom and encircling the distal end of said rod; the tip and tube being molded on the distal end of said rod with the material thereof entering said pierced hole.
Claim 9
Dependent Claim
146 words
An obturator comprising: an elongated rod having a handle at one end and a flexible tip mounted on the other end, said tip being of conical configuration with a blunt rounded apex, a hollow integral, truncated conical skirt normally forming part of said conical configuration but being foldable and invertible toward said apex for withdrawal through a passage; said rod is of aluminum and is enclosed in a sheathing of thermoplastic, said rod being normally straight for shipment, but bendable into a curve when in use in a curved tracheal tube; said rod includes a distal end which is swaged flatwise and pierced with a hole; and said tip includes an integral hollow tube extending rearwardly therefrom and encircling the distal end of said rod; the tip and tube being molded on the distal end of said rod with the material thereof entering said pierced hole.
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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |