US4563179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocking condition detection device in a fluid injection system
Assignee: Sharp Corp
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Filing: 1983-04-28
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Granted: 1986-01-07
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Expires: 2003-04-28
Abstract
Abstract A medical fluid injection system comprises a flexible conduit, a supply device, a movable element, and a blocking condition detection device. The supply device supplies a pressurized medical fluid through the flexible conduit. The movable element is moved for forcing the flexible conduit in a stressing direction to cause creep in the flexible conduit. The blocking condition detection device detects whether or not the flexible conduit is forced in an anti-stressing direction opposed to the stressing direction. In a specific form of the present invention, a monitor may be provided for monitoring whether the movable element is exactly moved or not.
Inventors
- 👤 Eiichi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:47
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16831; A61M5/16854; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
A fluid injection system comprising: a flexible conduit; supply means for supplying a pressurized fluid through said flexible conduit; movable means to force the flexible conduit in a stressing direction said movable means including a spring means and a movable element wherein said spring means provides a stress via said movable element to cause creep in said flexible conduit; and blocking condition detection means comprising a coil means and core means to form a resonance circuit for detecting whether or not the flexible conduit is forced in an anti-stressing direction opposed to said stressing direction thereby indicating that a blocking condition has developed in said flexible conduit, wherein movement of said movable means is detected in terms of the change of a resonance frequency, said resonance frequency increasing when the movable means stresses the flexible conduit to create a creep condition in said conduit and said resonance frequency decreasing when the movable means is forced in said anti-stressing direction separated from the flexible conduit.
Claim 2
Dependent Claim
164 words
A fluid injection system comprising: a flexible conduit; supply means for supplying a pressurized fluid through said flexible conduit; movable means to force the flexible conduit in a stressing direction said movable means including a spring means and a movable element wherein said spring means provides a stress via said movable element to cause creep in said flexible conduit; and blocking condition detection means comprising a coil means and core means to form a resonance circuit for detecting whether or not the flexible conduit is forced in an anti-stressing direction opposed to said stressing direction thereby indicating that a blocking condition has developed in said flexible conduit, wherein movement of said movable means is detected in terms of the change of a resonance frequency, said resonance frequency increasing when the movable means stresses the flexible conduit to create a creep condition in said conduit and said resonance frequency decreasing when the movable means is forced in said anti-stressing direction separated from the flexible conduit.
Claim 3
Dependent Claim
17 words
The system of claim 1, further including a monitor means for monitoring movement by said movable element.
Claim 4
Dependent Claim
28 words
The system of claim 2, wherein said monitor means comprises spring means for supplying a force to the movable element to balance creep force of the flexible conduit.
Claim 5
Dependent Claim
16 words
The system of claim 2, wherein said detection means further comprises a counter and a microcomputer.
Claim 6
Dependent Claim
90 words
The system of claim 1, wherein said movable element comprises a rod means further, and the blocking condition detection means comprises a shaft means which contains said core and is engaged with said rod means such that said rod means can move relative to said shaft means, and a spring means disposed at unengaged portions of the rod means and shaft means between the shaft means and the rod means, so that respective ends of the spring means are grasped by each of the shaft means and the rod means.
Claim 7
Dependent Claim
112 words
A detection system for detecting a blocking condition in a flexible conduit through which a pressurized fluid is supplied, said detection system comprising: a movable means to force said flexible conduit in a stressing direction, said movable means including a spring means and a movable element wherein said spring means provides a stress via said movable element to cause creep in said flexible conduit; and blocking condition detection means comprising a coil means and core means to form a resonance circuit for detecting whether or not said flexible conduit is forced in an anti-stressing direction opposed to said stressing direction, thereby indicating that a blocking condition has developed in said flexible conduit.
Claim 8
Dependent Claim
112 words
A detection system for detecting a blocking condition in a flexible conduit through which a pressurized fluid is supplied, said detection system comprising: a movable means to force said flexible conduit in a stressing direction, said movable means including a spring means and a movable element wherein said spring means provides a stress via said movable element to cause creep in said flexible conduit; and blocking condition detection means comprising a coil means and core means to form a resonance circuit for detecting whether or not said flexible conduit is forced in an anti-stressing direction opposed to said stressing direction, thereby indicating that a blocking condition has developed in said flexible conduit.
Claim 9
Dependent Claim
20 words
The detection system of claim 6, wherein said detection means further comprises a resonance circuit, a counter and a microcomputer.
Claim 10
Dependent Claim
87 words
The detection system of claim 6, wherein said movable element comprises a rod means, said detection means comprises a shaft means which contains said core and is engaged with said rod means such that said rod means can move relative to said shaft means and a spring means disposed at unengaged portions of the rod means and shaft means between the shaft means and the rod means, so that respective ends of the spring means are grasped by each of the shaft means and the rod means.
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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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |