Patent US4834707A successfully refreshed from Google Patents.
US4834707A
Expired / Lapsed
US
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Venting apparatus and method for cardiovascular pumping application
Assignee: Individual
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Filing: 1987-09-16
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Granted: 1989-05-30
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Expires: 2007-09-16
Abstract
Abstract This device relates to an improvement on mechanical enhancement of the pumping action of the human heart, which is achieved by an external venting source, such as a pump joined to an instrument insertable into a patient's heart or aorta and serving to vent excessive gases from the heart, thereby improving brain and lung functions in a closed-loop fashion, by improving the pumping ability of the human heart.
Inventors
- 👤 Phillip H. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3417; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M2202/00; A61M2202/02; A61M2210/00; A61M2210/10; A61M2210/12; A61M2210/127; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/148
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
Apparatus for mechanically enhancing heart functions thereby improving conditions associated therewith, comprising in combination: an elongated hollow tubular housing having an inlet and an outlet and a tip adapted to puncture the skin; filter means within said housing adequate to permit the passage of gases and prevent the passage of liquids into said housing; flexible conduit means communicating with the interior of said housing for venting gases from the heart; said filter means being removably retained in said housing and replaceable without removing said housing tip from the skin; removable guide means within said flexible conduit means; attachment means for connecting pumping means to said flexible conduit means outside the skin to facilitate removal of gases; and stop means to halt flow through said flexible conduit; whereby to reduce the volume of gases pumped by the heart and increase the volume of liquid pumped.
Claim 2
Dependent Claim
144 words
Apparatus for mechanically enhancing heart functions thereby improving conditions associated therewith, comprising in combination: an elongated hollow tubular housing having an inlet and an outlet and a tip adapted to puncture the skin; filter means within said housing adequate to permit the passage of gases and prevent the passage of liquids into said housing; flexible conduit means communicating with the interior of said housing for venting gases from the heart; said filter means being removably retained in said housing and replaceable without removing said housing tip from the skin; removable guide means within said flexible conduit means; attachment means for connecting pumping means to said flexible conduit means outside the skin to facilitate removal of gases; and stop means to halt flow through said flexible conduit; whereby to reduce the volume of gases pumped by the heart and increase the volume of liquid pumped.
Claim 3
Dependent Claim
20 words
Apparatus of claim 1 including a check valve in said flexible conduit means to prevent flow therethrough to the heart.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |