US3752187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated flow element
Assignee: Individual
•
Filing: 1971-11-10
•
Granted: 1973-08-14
•
Expires: 1991-11-10
Abstract
Abstract The invention concerns a flow element and method of making which consists of several plates stacked (layered) on top of each other having flow channels arranged therein and in which the number of layers is reduced by providing at least one channel completely enclosing a section of a plate. The above is accomplished by etching such a channel from both surfaces of a plate in which the channel is to be formed except in one region which is etched from one side only. A connecting web remains at this latter region and if a restriction is not desired in this region of the channel, the channel is made wider than the rest of the channel to the extent necessary to compensate for the lesser depth thereat.
Inventors
- 👤 D Retallick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:03
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/02; F15C1/06; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2224
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A flow element consisting of several stacked plates and including at least one intermediate plate in which an endless flow channel is formed, said endless flow channel penetrating transversely of flow direction through the entire thickness of said intermediate plate over most of the length of said endless flow channel, the remainder of said endless flow channel penetrating transversely through only a portion of the thickness of said intermediate plate.
Claim 2
Dependent Claim
70 words
A flow element consisting of several stacked plates and including at least one intermediate plate in which an endless flow channel is formed, said endless flow channel penetrating transversely of flow direction through the entire thickness of said intermediate plate over most of the length of said endless flow channel, the remainder of said endless flow channel penetrating transversely through only a portion of the thickness of said intermediate plate.
Claim 3
Dependent Claim
29 words
The flow element according to claim 1 wherein said endless flow channel is widened in the plane of said intermediate plate of said remainder of said endless flow channel.
Claim 4
Dependent Claim
38 words
The flow element according to claim 2 wherein the widened portion of said endless flow channel has a cross-sectional area which is substantially equal to the cross-sectional area of said endless channel over said most of its length.
Claim 5
Dependent Claim
83 words
A flow element comprising a plurality of stacked plates including at least one intermediate plate in which is formed a flow channel having a flow restriction therein; said flow channel extending longitudinally in the plane of said intermediate plate and having a nominally constant width throughout its length, said flow channel penetrating through the entire depth of said intermediate plate except at said flow restriction, said flow restriction being defined by less than full penetration of said flow channel through said intermediate plate.
Claim 6
Dependent Claim
83 words
A flow element comprising a plurality of stacked plates including at least one intermediate plate in which is formed a flow channel having a flow restriction therein; said flow channel extending longitudinally in the plane of said intermediate plate and having a nominally constant width throughout its length, said flow channel penetrating through the entire depth of said intermediate plate except at said flow restriction, said flow restriction being defined by less than full penetration of said flow channel through said intermediate plate.
Claim 7
Dependent Claim
110 words
In a flow element of the type in which a plurality of stacked plates include an intermediate plate in which at least one flow channel is defined and extends lengthwise in the plane of said intermediate plate and depthwise entirely through the thickness of said intermediate plate, a flow restriction defined in said flow channel in the form of a lengthwise-extending portion of said flow channel having a lesser depth than the thickness of said plate, the cross-sectional area of said portion of said flow channel being smaller than the cross-sectional area of said flow channel where said flow channel extends depthwise entirely through the thickness of said intermediate plate.
Claim 8
Dependent Claim
110 words
In a flow element of the type in which a plurality of stacked plates include an intermediate plate in which at least one flow channel is defined and extends lengthwise in the plane of said intermediate plate and depthwise entirely through the thickness of said intermediate plate, a flow restriction defined in said flow channel in the form of a lengthwise-extending portion of said flow channel having a lesser depth than the thickness of said plate, the cross-sectional area of said portion of said flow channel being smaller than the cross-sectional area of said flow channel where said flow channel extends depthwise entirely through the thickness of said intermediate plate.
References Cited (Backward Citations)
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Cited
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |