Patent US4377204A successfully refreshed from Google Patents.
US4377204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: Alfa Laval AB
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Filing: 1981-04-30
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Granted: 1983-03-22
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Expires: 2001-04-30
Abstract
Abstract Each plate of the heat exchanger has the usual groove for receiving a gasket; but the latter is secured to the plate at fastening points spaced from each other and located outside the sealing area defined by the groove.
Inventors
- 👤 Karl B. V. Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:53
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
In combination with a heat exchange plate having a pressed groove defining a sealing area, a gasket having a part adapted to seal in said groove, the gasket being adapted to seal against an adjacent heat exchange plate to define a heat exchange area of each plate, the gasket having fastening points spaced from each other and located outside the sealing area defined by said groove, and means for securing the gasket to the plate at said fastening points.
Claim 2
Dependent Claim
79 words
In combination with a heat exchange plate having a pressed groove defining a sealing area, a gasket having a part adapted to seal in said groove, the gasket being adapted to seal against an adjacent heat exchange plate to define a heat exchange area of each plate, the gasket having fastening points spaced from each other and located outside the sealing area defined by said groove, and means for securing the gasket to the plate at said fastening points.
Claim 3
Dependent Claim
25 words
The combination of claim 1, in which said securing means include tabs projecting from the side of the gasket remote from said heat exchange area.
Claim 4
Dependent Claim
32 words
The combination of claim 2, in which the heat exchange plate has notches spaced outwardly from said groove, said tabs being engageable in the notches to secure the gasket to the plate.
Claim 5
Dependent Claim
14 words
The combination of claim 2, in which the tabs are glued to the plate.
Claim 6
Dependent Claim
35 words
The combination of claim 2, in which the heat exchange plate has holes spaced outwardly from said grooves, said securing means also including a pin projecting from each tab and receivable in a said hole.
Claim 7
Dependent Claim
31 words
The combination of claim 2, in which the heat exchange plate has notches spaced outwardly from said groove, each said tab being generally T-shaped to form elements receivable in said notches.
Claim 8
Dependent Claim
20 words
The combination of claim 2, in which said securing means also include clamps for fastening the tabs to the plate.
Claim 9
Dependent Claim
21 words
The combination of claim 1, in which the gasket also has longitudinal projections on its underside for increasing its sealing ability.
References Cited (Backward Citations)
DK67709C
Cited
GB2028966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |