Patent US4556106A successfully refreshed from Google Patents.
US4556106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasketing for heat exchanger plates
Assignee: SPX Flow Technology Crawley Ltd
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Filing: 1984-04-04
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Granted: 1985-12-03
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Expires: 2004-04-04
Abstract
Abstract A gasket retention for heat exchanger plates includes a projection on the gasket which passes through an aperture in the plate with an interference fit. According to the present invention the apertures (2) are made so as to provide two alternative positions for the gasket projections (3), namely a tight position as illustrated in FIG. 1c and a freely movable position. The movement between positions may be by twisting as in FIG. 1c, or by a longtitudinal movement, e.g. in a key-hole slot aperture. The aperture may be tapered through the plates.
Inventors
- 👤 Geoffrey R. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:53
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
In a heat exchanger plate assembly comprising a plate having a gasket recess and a gasket held in the said recess by interengagement of a series of projections on the gasket and a series of apertures in the plate: the improvement that the projections are movable within the apertures between a first position, in which the projections may move freely in and out of the apertures, and a second position, in which the movement in and out of the apertures is strongly resisted by interference between the projection and the aperture.
Claim 2
Dependent Claim
91 words
In a heat exchanger plate assembly comprising a plate having a gasket recess and a gasket held in the said recess by interengagement of a series of projections on the gasket and a series of apertures in the plate: the improvement that the projections are movable within the apertures between a first position, in which the projections may move freely in and out of the apertures, and a second position, in which the movement in and out of the apertures is strongly resisted by interference between the projection and the aperture.
Claim 3
Dependent Claim
23 words
A plate assembly as claimed in claim 1, in which the projections are movable angularly between said first position and said second position.
Claim 4
Dependent Claim
57 words
A plate assembly as claimed in claim 2, in which the projections are elongated and the apertures are generally heart shaped, with one side of the heart larger than the other, so that the elongate projection will be a tight fit in one side of the aperture but will be freely movable through the other side thereof.
Claim 5
Dependent Claim
24 words
A plate assembly as claimed in claim 1, in which the projections are movable in translation between said first position and said second position.
Claim 6
Dependent Claim
18 words
A plate assembly as claimed in claim 1, in which the apertures are slots tapered along their lengths.
Claim 7
Dependent Claim
16 words
A plate assembly as claimed in claim 1, in which the slots are of key-hole configuration.
Claim 8
Dependent Claim
38 words
A plate assembly as claimed in claim 1, in which the projections have a necked change in section, and movement in and out of the apertures is strongly resisted by engagement at the minimum section of the projection.
Claim 9
Dependent Claim
47 words
A plate assembly as claimed in claim 1, in which the apertures are tapered through the plate so as to have a larger dimension on the side of the plate adjacent to the main body of the gasket than on the side to which the projection projects.
Claim 10
Dependent Claim
14 words
A plate assembly as claimed in claim 8, in which the tapering is smooth.
Claim 11
Dependent Claim
14 words
A plate assembly as claimed in claim 8, in which the tapering is arcuate.
Claim 12
Dependent Claim
46 words
A plate assembly as claimed in claim 5 wherein the apertures are tapered through the plate so as to have a larger dimension on the side of the plate adjacent to the main body of the gasket then on the side to which the projection projects.
Claim 13
Dependent Claim
14 words
A plate assembly as claimed in claim 11 in which the tapering is arcuate.
References Cited (Backward Citations)
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Cited
SU416550A1
Cited
US4063591A
Cited
US4002344A
Cited
GB2028996A
Cited
GB2069680A
Cited
US4377204A
Cited
GB2075656A
Cited
US4432415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |