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US3908757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaskets for plate heat exchangers
Assignee: SPX Flow Technology Crawley Ltd
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Filing: 1974-08-08
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Granted: 1975-09-30
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Expires: 1994-08-08
Abstract
Abstract A convention heat exchanger plate has two ports which are isolated from the heat transfer area by gaskets and an isolating bridge zone between these ports and the heat transfer zone is normally vented to atmosphere by a gap in the gasket defining it. According to the present invention the gasket is formed of harder material in the region of such vent gap to prevent the gasket material extending into the vent gap under heat and pressure.
Inventors
- 👤 Felix William Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:19
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/10; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/064; F16J15/10; F16J15/104; F16J15/106
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
A sealing arrangement for a heat exchanger plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone and being vented, the sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the said linkage portions having vent gaps and being formed, in the region of the said vent gaps, of a material harder than the material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 2
Dependent Claim
131 words
A sealing arrangement for a heat exchanger plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone and being vented, the sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the said linkage portions having vent gaps and being formed, in the region of the said vent gaps, of a material harder than the material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 3
Dependent Claim
22 words
A sealing arrangement as claimed in claim 1, in which the harder regions are integral with the main part of the gasket.
Claim 4
Dependent Claim
34 words
A sealing arrangement as claimed in claim 2, in which the portions of the harder regions whiCh are intended to contact the adjacent plate are of reduced dimension in comparison with the sealing portions.
Claim 5
Dependent Claim
126 words
A heat exchanger plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone being vented, and a sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the linkage portions having vent gaps and being formed, in the region of the said vent gaps, of a material harder than the material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 6
Dependent Claim
126 words
A heat exchanger plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone being vented, and a sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the linkage portions having vent gaps and being formed, in the region of the said vent gaps, of a material harder than the material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 7
Dependent Claim
23 words
A heat exchanger plate as claimed in claim 4, in which the harder regions are integral with the main part of the gasket.
Claim 8
Dependent Claim
35 words
A heat exchanger plate as claimed in claim 5, in which the portions of the harder regions which are intended to contact the adjacent plate are of reduced dimension in comparison with the sealing portions.
Claim 9
Dependent Claim
135 words
A plate heat exchanger comprising a pack of plates in spaced face-to-face arrangement, each plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone and being vented, and a sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the said leakage portions having vent gaps and being formed, in the region of the said vent gaps, of a material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 10
Dependent Claim
135 words
A plate heat exchanger comprising a pack of plates in spaced face-to-face arrangement, each plate having port apertures, a flow space zone and bridge zones between selected port apertures and the flow space zone, the bridge zones being isolated in use by the sealing arrangement from other respective port apertures and the flow space zone and being vented, and a sealing arrangement comprising a peripheral gasket portion surrounding the flow space zone, a gasket portion surrounding each port aperture isolated from the flow space zone, and linking gasket portions between the peripheral gasket portion and the port aperture gasket portions, the said leakage portions having vent gaps and being formed, in the region of the said vent gaps, of a material used for the sealing gasket portions whereby extrusion into the vent gaps is prevented.
Claim 11
Dependent Claim
23 words
A plate heat exchanger as claimed in claim 7, in which the harder regions are integral with the main part of the gasket.
Claim 12
Dependent Claim
35 words
A plate heat exchanger as claimed in claim 8, in which the portions of the harder regions which are intended to contact the adjacent plate are of reduced dimension in comparison with the sealing portions.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |