Patent US4547190A successfully refreshed from Google Patents.
US4547190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlet blood filter assembly
Assignee: Filtertek Inc
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Filing: 1982-11-26
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Granted: 1985-10-15
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Expires: 2002-11-26
Abstract
Abstract The present invention relates to an inlet blood filter assembly. The inlet blood filter assembly includes a drip chamber, filter chamber and pump chamber. The assembly is constructed so that blood flows through the drip chamber, into the filter chamber and into the pump chamber. The inlet blood filter assembly is blow molded so that the thickness of the walls of the chambers may be varied.
Inventors
- 👤 Hayden L. Leason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:41
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/165
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
An integral inlet blood filter assembly comprising: a drip chamber including wall members; a filter chamber including wall members; and a pump chamber, the pump chamber having wall members which are thinner than the drip chamber wall members and the drip, filter and pump chambers being so arranged and constructed that blood flows from the drip chamber into the filter chamber and then into the pump chamber; wherein the drip chamber wall members, filter chamber wall members, and pump chamber wall members are all formed from a single piece of thermoplastic material.
Claim 2
Dependent Claim
92 words
An integral inlet blood filter assembly comprising: a drip chamber including wall members; a filter chamber including wall members; and a pump chamber, the pump chamber having wall members which are thinner than the drip chamber wall members and the drip, filter and pump chambers being so arranged and constructed that blood flows from the drip chamber into the filter chamber and then into the pump chamber; wherein the drip chamber wall members, filter chamber wall members, and pump chamber wall members are all formed from a single piece of thermoplastic material.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein the wall members of the pump chamber are about 0.02 to 0.03 inches thick.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 wherein the wall members of the filter chamber are as thick as the wall members of the pump chamber.
Claim 5
Dependent Claim
33 words
The apparatus of claim 1 wherein the pump chamber includes a ball-check for preventing the reverse flow of blood from the pump chamber into the filter chamber when the pump chamber is compressed.
Claim 6
Dependent Claim
31 words
The apparatus of claim 4 including: a spike solvent bonded to an end of the drip chamber; and an administration set tubing solvent bonded to an end of the pump chamber.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 wherein the wall members of the filter chamber are as thick as the wall members of the drip chamber.
Claim 8
Dependent Claim
83 words
An inlet blood filter assembly comprising: a drip chamber including wall members; a filter chamber including wall members; and a pump chamber including wall members which are thinner and more flexible than the wall members of the drip chamber; said drip, filter and pump chambers being arranged so that blood flows from the drip chamber into the filter chamber and then into the pump chamber; said wall members of the drip, filter and pump chambers being formed of a single piece of material.
Claim 9
Dependent Claim
83 words
An inlet blood filter assembly comprising: a drip chamber including wall members; a filter chamber including wall members; and a pump chamber including wall members which are thinner and more flexible than the wall members of the drip chamber; said drip, filter and pump chambers being arranged so that blood flows from the drip chamber into the filter chamber and then into the pump chamber; said wall members of the drip, filter and pump chambers being formed of a single piece of material.
Claim 10
Dependent Claim
20 words
The appratus of claim 7 wherein the wall members of the pump chamber are about 0.02 to 0.03 inches thick.
Claim 11
Dependent Claim
24 words
The apparatus of claim 7 wherein the wall members of the filter chamber are as thick as the wall members of the pump chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |