US5160474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overmolded gasket, heat exchanger tank incorporating the same and method for making the same
Assignee: PAR INDUSTRIES LLC
•
Filing: 1990-12-21
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Granted: 1992-11-03
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Expires: 2010-12-21
Abstract
Abstract A method for attaching an elastomeric gasket (12, 70) to a thermoplastic substrate (10) comprises the steps of forming the substrate (10) with a slot (20) and an upstanding projection (22) adjacent the slot (20), deforming the projection (22) into an upper portion of the slot (20) to provide a stake thereby, and molding the elastomeric gasket (12, 70) onto the substrate (10) and into the slot (20). The elastomeric gasket (12, 70) is thereby retained on the substrate (10) by the projection (22) in cooperation with the slot (20). The substrate (10) is preferably made of a nylon material, and the elastomeric gasket (12, 70) is preferably made of an EPDM polymer.
Inventors
- 👤 James W. Huff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:10
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0053; B29C; B29C37/00; B29C37/0078; B29C37/0082; B29C45/00; B29C45/16; B29C45/1657; B29C45/1676; B29C70/00; B29C70/68; B29C70/74; B29C70/76; B29C70/766; F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0224; F28F9/0226; B29C2045/1667; B29K; B29K2023/00; B29K2023/16; B29K2077/00; B29K2221/00; B29K2221/003; B29L; B29L2031/00; B29L2031/26; B29L2031/265; F28F2255/00; F28F2255/14; F28F2255/143; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49389
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
A method for forming a heat exchanger tank having a gasket on a sealing rim of the tank, the method comprising the steps of: molding a heat exchanger tank with a channel in the sealing rim and a retaining projection on the sealing rim, wherein the retaining projection has a side substantially in common with the channel; deforming the retaining projection into an upper portion of the channel to thereby provide a stake; and overmolding a gasket to the tank and into the channel to mechanically interlock the gasket and the tank through the stake.
Claim 2
Independent Claim
95 words
A method for forming a heat exchanger tank having a gasket on a sealing rim of the tank, the method comprising the steps of: molding a heat exchanger tank with a channel in the sealing rim and a retaining projection on the sealing rim, wherein the retaining projection has a side substantially in common with the channel; deforming the retaining projection into an upper portion of the channel to thereby provide a stake; and overmolding a gasket to the tank and into the channel to mechanically interlock the gasket and the tank through the stake.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein the retaining projection is deformed during the overmolding step.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein there are multiple retaining projections spaced along the sealing rim adjacent the channel.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein the retaining projection comprises an upper ramped surface which extends upwardly toward the channel.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein the tank is formed of a thermoplastic resin.
Claim 7
Dependent Claim
15 words
A method according to claim 5 wherein the tank is formed of a nylon resin.
Claim 8
Dependent Claim
15 words
A method according to claim 5 wherein the gasket is formed of an elastomeric resin.
Claim 9
Dependent Claim
15 words
A method according to claim 5 wherein the gasket is formed of a thermosetting rubber.
Claim 10
Dependent Claim
15 words
A method according to claim 4 wherein the gasket is formed of a thermoplastic rubber.
Claim 11
Independent Claim
76 words
A method of attaching an elastomeric shape to a thermoplastic substrate comprising the steps of: forming a substrate with at least one slot and an upstanding projection with a side substantially in common with the slot; deforming the projection into an upper portion of the slot to thereby provide a stake; and molding the elastomeric shape onto the substrate and into the slot, whereby the elastomeric shape is mechanically retained on the substrate through the stake.
Claim 12
Independent Claim
76 words
A method of attaching an elastomeric shape to a thermoplastic substrate comprising the steps of: forming a substrate with at least one slot and an upstanding projection with a side substantially in common with the slot; deforming the projection into an upper portion of the slot to thereby provide a stake; and molding the elastomeric shape onto the substrate and into the slot, whereby the elastomeric shape is mechanically retained on the substrate through the stake.
Claim 13
Dependent Claim
29 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 10 and further comprising the step of heating the substrate projection before the deforming step.
Claim 14
Dependent Claim
23 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 11 wherein the thermoplastic substrate is a nylon resin.
Claim 15
Dependent Claim
24 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 12 wherein the elastomeric shape is a thermosetting elastomeric resin.
Claim 16
Dependent Claim
23 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 11 wherein the elastomeric shape is an EPDM polymer.
Claim 17
Dependent Claim
23 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 10 wherein the elastomeric shape is an EPDM polymer.
Claim 18
Dependent Claim
34 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 10 wherein the upstanding projection has an upper ramp surface which, prior to the deformation step, extends upwardly toward the
Claim 19
Dependent Claim
35 words
A method of attaching an elastomeric shape to a thermoplastic substrate according to claim 10 wherein the projection is deformed by moving a molding head into contact with the projection just before the molding step.
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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) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |