Patent US3841308A successfully refreshed from Google Patents.
US3841308A
Expired / Lapsed
US
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Distally valved catheter device
Assignee: Medical Evaluation Devices and Instruments Corp
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Filing: 1973-10-15
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Granted: 1974-10-15
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Expires: 1993-10-15
Abstract
Abstract The disclosure is that of an invention directed to spring guides, catheters, combined guide-catheters or intra-venous feeding tubes in which the distal end is provided with a normally-open proximally-controlled flow shut off valve. The valve is formed as a helically wound spring distal extension with the coils normally separated to define passages for fluid flow therebetween and a proximally operated wire stylette is used to axially contract the spring extension so that the coils thereof are brought into mutual contact, thus closing the passages therebetween.
Inventors
- 👤 T Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075; A61M2025/0079
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A flexible catheter-like device, including a flexible inner lumen-defining body having proximal and distal ends, a helically would spring defining an open end distal extension of said inner body and having proximal and distal ends, said distal extension being formed with the coils thereof normally separated whereby to provide normally open passages therebetween for fluid flow into or out of the lumen of said inner body, said inner body being enclosed within an outer smooth flexible sheathing, firmly bonded thereto and formed from an inert plastic material, said sheathing extending distally beyond the distal end of said inner bOdy to define a hollow tip for containing said spring-defined distal extension, means for closing the distal end of said distal extension, and a stylette passing through the lumen of said inner body and having its distal end affixed to said distal end closing means and having its proximal end extending proximally beyond the proximal end of said inner body for proximally contracting said distal extension to move the coils thereof into mutual contact, whereby to close the normally open passages therebetween.
Claim 2
Dependent Claim
180 words
A flexible catheter-like device, including a flexible inner lumen-defining body having proximal and distal ends, a helically would spring defining an open end distal extension of said inner body and having proximal and distal ends, said distal extension being formed with the coils thereof normally separated whereby to provide normally open passages therebetween for fluid flow into or out of the lumen of said inner body, said inner body being enclosed within an outer smooth flexible sheathing, firmly bonded thereto and formed from an inert plastic material, said sheathing extending distally beyond the distal end of said inner bOdy to define a hollow tip for containing said spring-defined distal extension, means for closing the distal end of said distal extension, and a stylette passing through the lumen of said inner body and having its distal end affixed to said distal end closing means and having its proximal end extending proximally beyond the proximal end of said inner body for proximally contracting said distal extension to move the coils thereof into mutual contact, whereby to close the normally open passages therebetween.
Claim 3
Dependent Claim
42 words
The device of claim 1 in which said inner body is formed from a helically wound spring with the helices thereof in contact with each other and in which said distal end extension is formed as a continuation of said body spring.
Claim 4
Dependent Claim
63 words
The device of claim 1 in which the distally extending portion of said outer sheathing is coextensive in length with the said distal extension of said inner body and is firmly bonded to the separated coils thereof, said distally extending portion of said outer sheathing being provided with a plurality of radial apertures in register with corresponding passages between said normally separated coils.
Claim 5
Dependent Claim
88 words
The device of claim 1 in which the distally extending portion of said outer sheathing has a length sufficient to define a cavity for retaining said spring-defined distal extension when said distal extension is proximally contracted to its mutual coil-contacting condition, said distally extending portion of said outer sheathing being unbonded to said spring-defined distal extension whereby to permit the coils of said distal extension to partake of axial movement relative thereto, said distal end closing means being sealed to the distal coil of said distal end extension.
Claim 6
Dependent Claim
90 words
The device of claim 1 in which the distally extending portion of said outer sheathing is coextensive in length with the said distal extension of said inner body but is unbonded thereto whereby to permit the coils of said distal extension to partake of axial movement relative thereto, said distally extending portion of said outer sheathing being provided with a plurality of radial apertures in register with corresponding passages between said normally separated coils, said distal end closing means being sealed to the distal coil of said distal end extension.
Claim 7
Dependent Claim
115 words
The device of claim 1 in which the distally extending portion of said outer sheathing is coextensive in length with the said distal extension of said inner body, but is unbonded thereto whereby to permit the coils of said distal extension to partake of axial movement relative thereto, said distally extending portion of said outer sheathing being provided with a plurality of radial apertures in register with corresponding passages between said normally separated coils, said distal end closing means being located distally of the distal end of said distal end extension and being axially movable relative thereto, whereby to serve as a valve supplementary to that defined by the coils of said distal end extension.
Claim 8
Dependent Claim
78 words
The device of claim 6 in which the distally extending portion of said outer sheathing additionally if provided with a distal extension having a proximal end and a distal end portion, the proximal end of said sheathing distal extension being necked down to restrain said distal end spring extension against abnormal axial elongation, said distal end portion of said sheathing extension being configured to define a generally spherical cage for freely retaining said distal end closing means therein.
Claim 9
Dependent Claim
38 words
The device of claim 1 additionally including means operably associated with the proximal end thereof for releasably retaining said stylette in a proximally retracted position such as to maintain said distal spring extension in its proximally contracted condition.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |