Patent US3955574A successfully refreshed from Google Patents.
US3955574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping system for catheter suction units
Assignee: Individual
•
Filing: 1974-12-09
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Granted: 1976-05-11
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Expires: 1994-12-09
Abstract
Abstract An improved pumping system for use with catheter suction units, is disclosed. A cyclical alternating of vacuum and pressure is applied to a catheter to have suction through the catheter interrupted by a predetermined period of blowing. A source of mist may be connected to the catheter to have a detergent or enzymatic fluid ejected through the catheter during selected periods of blowing.
Inventors
- 👤 Morton K. Rubinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/77; A61M1/772
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
128 words
A pumping system for a suction unit designed for suction of fluids and viscous materials from a human body, said pumping system comprising: pumping means for providing a source of positive pressure and a source of negative pressure; catheter means for drawing fluids and viscous materials therethrough in response to the application of negative pressure to said catheter means; and control means for alternately applying negative pressure and positive pressure, for predetermined periods of time, from said pumping means to said catheter means to produce suction of fluids and viscous materials through said catheter means when positioned in or on said fluids and viscous materials, the alternate application of negative pressure and positive pressure causing continuous cyclic reversals of fluid flow through said catheter means during said suction.
Claim 2
Dependent Claim
128 words
A pumping system for a suction unit designed for suction of fluids and viscous materials from a human body, said pumping system comprising: pumping means for providing a source of positive pressure and a source of negative pressure; catheter means for drawing fluids and viscous materials therethrough in response to the application of negative pressure to said catheter means; and control means for alternately applying negative pressure and positive pressure, for predetermined periods of time, from said pumping means to said catheter means to produce suction of fluids and viscous materials through said catheter means when positioned in or on said fluids and viscous materials, the alternate application of negative pressure and positive pressure causing continuous cyclic reversals of fluid flow through said catheter means during said suction.
Claim 3
Dependent Claim
78 words
The pumping system defined by claim 1, said control means including: valve means having first and second positions for enabling application of negative pressure from said pumping means to said catheter means when in said first position and enabling application of positive pressure from said pumping means to said catheter means when in said second position; and timer means for operating said valve means to be alternately in said first and second positions thereof for predetermined time periods.
Claim 4
Dependent Claim
44 words
The pumping system defined by claim 1, further including: regulator means for regulating the positive and negative pressure being applied from said pumping means to said catheter means; and gauge means for providing a visual indication of said positive pressure and said negative pressure.
Claim 5
Dependent Claim
103 words
The pumping system defined by claim 1, further including: source means for containing a source of fluid desired to be ejected through said catheter means; source valve means for enabling said source means to be operatively connected to said catheter means to have fluid contained by said source means ejected through said catheter means; and switching means for controllably connecting said source valve means to said control means to have said source valve means operated to connect said source means to said catheter means only during selected periods during which positive pressure is being applied from sad pumping means to said catheter means.
Claim 6
Dependent Claim
57 words
The pumping system defined by claim 1, further including: detector means for providing a detector signal in response to the negative pressure applied to said catheter means exceeding a predetermined threshold; and alarm means responsive to said detector signal for providing an indication that said negative pressure applied to said catheter means has exceeded said predetermined threshold.
Claim 7
Dependent Claim
33 words
The pumping system defined by claim 1, further including reservoir means connected to have negative pressure applied thereto from said pumping means for receiving fluids and viscouse materials drawn through said catheter means.
Claim 8
Dependent Claim
68 words
The pumping system defined by claim 1, further including boosting means for controllably applying a predetermined secondary positive pressure from said pumping means to said catheter means, said boosting means having a secondary valve connected to said control means to enable said secondary positive pressure to be controllably applied to said catheter means only during selected periods when said positive pressure is being applied to said catheter means.
Claim 9
Dependent Claim
103 words
The pumping system defined by claim 2, further including: source means for containing a source of fluid desired to be ejected through said catheter means; source valve means for enabling said source means to be operatively connected to said catheter means to have fluid contained by said source means ejected through said catheter means; and switching means for controllably connecting said source valve means to said timer means to have said source valve means operated to connect said source means to said catheter means only during selected periods during which positive pressure is being applied from said pumping means to said catheter means.
Claim 10
Dependent Claim
71 words
The pumping system defined in claim 8, further including boosting means for controllably applying a predetermined secondary positive pressure from said pumping means to said catheter means, said boosting means having a secondary valve that is selectively connected to said timer means to enable said secondary positive pressure to be controllably applied to said catheter means only during selected periods when said positive pressure is being applied to said catheter means.
Claim 11
Dependent Claim
59 words
The pumping system defined by claim 9, further including: detector means for providing a detector signal in response to the incidence of negative pressures applied to said catheter means exceeding a predetermined threshold; and alarm means responsive to said detector signal for providing an indication that said negative pressures applied to said catheter means has exceeded said predetermined threshold.
Claim 12
Dependent Claim
44 words
The pumping system defined by claim 1, further including: regulator means for regulating the positive and negative pressure being applied from said pumping means to said catheter means; and gauge means for providing a visual indication of said positive pressure and said negative pressure.
Claim 13
Dependent Claim
33 words
The pumping system defined by claim 11, further including reservoir means connected to have negative pressure applied thereto from said pumping means for receiving fluids and viscous materials drawn through said catheter means.
Claim 14
Dependent Claim
95 words
The pumping system defined by claim 1, further including: detector means for providing a detector signal in response to the negative pressure applied to said catheter means exceeding a predetermined threshold; and regulator means for regulating the positive pressure applied from said pumping means to said catheter means, said regulator means being connected to receive said detector signal from said detector means, said regulator means applying to said catheter means a first positive pressure in the absence of a detector signal and a second positive pressure in response to the application of said detector signal.
Claim 15
Dependent Claim
62 words
The pumping system defined by claim 7, further including: detector means for providing a detector signal in response to the negative pressure applied to said catheter means exceeding a predetermined threshold; and switching means for controllably connecting said control means to said secondary valve, said switching means being connected to said detector means to be operated in response to said detector signal.
Claim 16
Dependent Claim
78 words
The pumping system defined by claim 14, said control means including: valve means having first and second positions for enabling application of negative pressure from said pumping means to said catheter means when in said first position and enabling application of positive pressure from said pumping means to said catheter means when in said second position; and timer means for operating said valve means to be alternately in said first and second positions thereof for predetermined time periods.
Claim 17
Dependent Claim
72 words
The pumping system defind by claim 15, further including: regulator means for regulating the positive pressure applied from said pumping means to said catheter means, said regulator means being connected to receive said detector signal from said detector means, said regulator means applying to said catheter means a first positive pressure in the absence of a detector signal and a second positive pressure in response to the application of said detector signal.
Claim 18
Dependent Claim
103 words
The pumping system defined by claim 16, further including: source means for containing a source of fluid desired to be ejected through said catheter means; source valve means for enabling said source means to be operatively connected to said catheter means to have fluid contained by said source means ejected through said catheter means; and switching means for controllably connecting said source valve means to said control means to have said sorcce valve means operated to connect said source means to said catheter means only during selected periods during which positive pressure is being applied from said pumping means to said catheter 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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |