Patent US4428743A successfully refreshed from Google Patents.
US4428743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-through chamber
Assignee: Gambro Dialysatoren GmbH and Co KG
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Filing: 1982-01-29
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Granted: 1984-01-31
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Expires: 2002-01-29
Abstract
Abstract Flow-through chambers, such as drip or expansion chambers, which are intended to form part of a duct for blood or other such sensitive fluids, are disclosed. The chambers include a housing, an inlet, an outlet, and a flow directing portion of the housing for directing the flow of the fluid from the inlet to the outlet. The flow directing portion of the housing is formed in a manner so as to deflect the flow of the fluid from the inlet towards the outlet in a gradual manner so as to protect the fluid within the chamber.
Inventors
- 👤 Wolfgang Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1411; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A flow-through chamber for handling sensitive liquids such as blood, comprising a housing including an inlet, an oulet and flow directing means for directing the flow of said liquid from said inlet to said outlet, said flow directing means comprising an indentation of one-piece construction formed by a portion of the wall of said housing, said flow directing means being formed in a manner so as to be positioned in the flow of said liquid between said inlet and said outlet to deflect the flow of said liquid from said inlet towards said outlet in a gradual manner so as to protect said liquid within said chamber.
Claim 2
Dependent Claim
107 words
A flow-through chamber for handling sensitive liquids such as blood, comprising a housing including an inlet, an oulet and flow directing means for directing the flow of said liquid from said inlet to said outlet, said flow directing means comprising an indentation of one-piece construction formed by a portion of the wall of said housing, said flow directing means being formed in a manner so as to be positioned in the flow of said liquid between said inlet and said outlet to deflect the flow of said liquid from said inlet towards said outlet in a gradual manner so as to protect said liquid within said chamber.
Claim 3
Dependent Claim
55 words
The flow-through chamber of claim 1 wherein said housing has an elongated shape having a first end and a second end, with both said inlet and said outlet being located at said first end thereof, whereby said housing may be utilized in a vertical configuration with said first end being located at the bottom thereof.
Claim 4
Dependent Claim
36 words
The flow-through chamber of claim 2 wherein said inlet and said outlet are located parallel to each other at said first end of said housing, and said inlet and said outlet each include integral nozzle members.
Claim 5
Dependent Claim
116 words
The flow-through chamber of claim 1 wherein said housing has an elongated shape having a first end and a second end, whereby said housing may be utilized in a vertical configuration with said first end being located at the bottom thereof, and wherein said inlet is located at said second end of said housing, said outlet is located at said first end of said housing, thereby defining a vertical path between said inlet and said outlet, and said flow directing means projects into said vertical path whereby the distance which said fluid must drop from said inlet to said outlet is reduced when the level of fluid in said housing is below said flow directing means.
Claim 6
Dependent Claim
209 words
A flow-through chamber for handling sensitive fluids, comprising a housing including an inlet, an outlet and a flow directing means for directing the flow of said fluid from said inlet to said outlet, said flow directing means comprising a portion of said housing formed in a manner so as to deflect the flow of said fluid from said inlet towards said outlet in a gradual manner so as to protect said fluid within said chamber, said housing having an elongated shape having a first end and a second end, both said inlet and said outlet being located at said first end thereof, whereby said housing may be utilized in a vertical configuration with said first end being located at the bottom thereof, said first end of said housing including an oblique wall portion having a first end and a second end, said first end of said oblique wall portion being lower than said second end of said oblique wall portion when said housing is placed in said vertical configuration, with said outlet being located at said first end of said oblique wall portion and said inlet being located at said second end of said oblique wall portion, whereby said outlet is located at the lowest point of said housing.
Claim 7
Dependent Claim
209 words
A flow-through chamber for handling sensitive fluids, comprising a housing including an inlet, an outlet and a flow directing means for directing the flow of said fluid from said inlet to said outlet, said flow directing means comprising a portion of said housing formed in a manner so as to deflect the flow of said fluid from said inlet towards said outlet in a gradual manner so as to protect said fluid within said chamber, said housing having an elongated shape having a first end and a second end, both said inlet and said outlet being located at said first end thereof, whereby said housing may be utilized in a vertical configuration with said first end being located at the bottom thereof, said first end of said housing including an oblique wall portion having a first end and a second end, said first end of said oblique wall portion being lower than said second end of said oblique wall portion when said housing is placed in said vertical configuration, with said outlet being located at said first end of said oblique wall portion and said inlet being located at said second end of said oblique wall portion, whereby said outlet is located at the lowest point of said housing.
Claim 8
Dependent Claim
35 words
The flow-through chamber of claim 1 wherein said inlet and said outlet are located parallel to each other at said first end of said housing, said inlet and said outlet each including integral nozzle members.
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |