US3890976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter tip assembly
Assignee: MEDICAL PRODUCTS CORP
•
Filing: 1974-01-21
•
Granted: 1975-06-24
•
Expires: 1994-01-21
Abstract
Abstract A catheter having an improved tip structure. The catheter tube has a relatively low durometer tubular body portion and a separate higher durometer molded tip thereon which does not collapse when it strikes an obstruction during insertion. Preferably, the tip assembly is precision molded from a suitable plastic, such as PVC, acrylates, urethanes, styrenes or the like, having a durometer greater than the tube body, and an inwardly tapering contour to provide for ease of insertion. The distal aperture of tips for endotrachael-type tubes also have nonbeaded, chamfered leading edges. The tips may be color coded to the internal diameter of the catheter tube for easy operating room identification, and may be radio-opaque. The tube body is precurved into a hyperbolic shape with the distal end being the ''''straight'''' part of the hyperbolic curve, terminating in the molded tip.
Inventors
- 👤 Seymour Bazell
- 👤 Ralph G Ostensen
- 👤 Edward M Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:33
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/008; A61M25/10; A61M2025/1043; A61M2025/1093; A61M25/0069; A61M25/01; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
229 words
An improved tracheal tube comprising: a. a flexible, tubular body portion with a durometer of above 60 to about 85 having a central passage extending axially therein from a proximal to a distal end; b. an inflatable cuff positioned on the tubular body portion; c. means for inflating said cuff; d. a separate molded tip secured to the distal end of the flexible tubular body portion, i. said tip having a distal portion and having an aperture therein communicating with the central passage of said tube body portion, ii. said tip being resilient material having a durometer higher than the durometer of said flexible tube body portion, and in the range of from about 75 to about 95, iii. said distal portion having a distally extending inward taper and a chamfered leading edge of uniform thickness around its entire circumference oriented transverse to the axis of the aperture for ease of insertion into a body, and iv. said tip also having a proximal portion with an inwardly beveled edge abutting and heat sealed to the distal end of said tube body portion, v. said heat seal providing a smooth transition between the tubular body portion and the tip on both the exterior and the interior thereof; e. said tip providing a tracheal tube wherein the tip does not fold over upon striking an obstruction when inserted into the body.
Claim 2
Dependent Claim
229 words
An improved tracheal tube comprising: a. a flexible, tubular body portion with a durometer of above 60 to about 85 having a central passage extending axially therein from a proximal to a distal end; b. an inflatable cuff positioned on the tubular body portion; c. means for inflating said cuff; d. a separate molded tip secured to the distal end of the flexible tubular body portion, i. said tip having a distal portion and having an aperture therein communicating with the central passage of said tube body portion, ii. said tip being resilient material having a durometer higher than the durometer of said flexible tube body portion, and in the range of from about 75 to about 95, iii. said distal portion having a distally extending inward taper and a chamfered leading edge of uniform thickness around its entire circumference oriented transverse to the axis of the aperture for ease of insertion into a body, and iv. said tip also having a proximal portion with an inwardly beveled edge abutting and heat sealed to the distal end of said tube body portion, v. said heat seal providing a smooth transition between the tubular body portion and the tip on both the exterior and the interior thereof; e. said tip providing a tracheal tube wherein the tip does not fold over upon striking an obstruction when inserted into the body.
Claim 3
Dependent Claim
34 words
A tracheal tube as in claim 1 wherein said tip is color coded to identify the inner diameter of the tube body central passage for ease of recognition and size selection for surgical use.
Claim 4
Dependent Claim
24 words
A tracheal tube as in claim 1 wherein said tip material is radio-opaque to render the position of said tip locatable when in use.
Claim 5
Dependent Claim
20 words
A tracheal tube as in claim 1 wherein said tube body and said tip assembly are polyvinyl chloride plastic-containing materials.
References Cited (Backward Citations)
US286041A
Cited
US3288901A
Cited
US3547126A
Cited
US3625793A
Cited
US3719737A
Cited
US3788327A
Cited
US3734100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |