US3937641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of assembling adhesive joint
Assignee: Trane US Inc
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Filing: 1974-08-30
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Granted: 1976-02-10
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Expires: 1994-08-30
Abstract
Abstract The method of joining aluminum tubing wherein a heat curable adhesive in tape form is helically wound on the end portion of one tube prior to its being telescoped with the heated end of a second tube.
Inventors
- 👤 Gerald J. Kushner
- 👤 William D. Irish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:14
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/103; F28; F28F; F28F9/00; F28F9/26; F28F2275/00; F28F2275/02; F28F2275/025; Y; Y10; Y10S; Y10S138/00; Y10S138/01; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A method of joining metallic tubing comprising: providing a first tube having an end portion adapted to receive an end portion of a second tube with radial clearance between the contiguous surfaces of the two tubes; helically winding a single thickness of heat curable adhesive film having a volume greater than said radial clearance to the end portion of said second tube to provide a space between said windings; heating the end portion of said first tube to a temperature sufficient to plasticize said adhesive film; telescoping the end portion of said second tube into the heated bore of the first tube and allowing the adhesive on said second tube to plasticize and spread into the radial clearance between the contiguous surfaces of the tubes while air entrapped during the spreading of said adhesive escapes between the helical winding and past the open end of said second tube; and heating said telescoped joint to a temperature sufficient to cure said adhesive.
Claim 2
Independent Claim
161 words
A method of joining metallic tubing comprising: providing a first tube having an end portion adapted to receive an end portion of a second tube with radial clearance between the contiguous surfaces of the two tubes; helically winding a single thickness of heat curable adhesive film having a volume greater than said radial clearance to the end portion of said second tube to provide a space between said windings; heating the end portion of said first tube to a temperature sufficient to plasticize said adhesive film; telescoping the end portion of said second tube into the heated bore of the first tube and allowing the adhesive on said second tube to plasticize and spread into the radial clearance between the contiguous surfaces of the tubes while air entrapped during the spreading of said adhesive escapes between the helical winding and past the open end of said second tube; and heating said telescoped joint to a temperature sufficient to cure said adhesive.
Claim 3
Dependent Claim
61 words
The method as set forth in claim 1 wherein said telescoped joint is positioned so that the open end of said first tube is elevated relative to said end portions to allow said adhesive to distribute into said radial clearance in a direction away from said open end while heating said telescoped joint to a temperature sufficient to cure said adhesive.
Claim 4
Dependent Claim
60 words
The method as set forth in claim 1 wherein said telescoped joint is positioned substantially vertical, with the open end of said first tube facing in an up direction to allow said adhesive to distribute into said radial clearance in a direction away from said open end while heating said telescoped joint to a temperature sufficient to cure said adhesive.
Claim 5
Dependent Claim
36 words
The method as set forth in claim 1, wherein said adhesive thickness is greater than said radial clearance to insure contact between the surface of said heated bore and the radially disposed surface of said adhesive.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |