US3697630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding or repairing process
Assignee: National Aeronautics and Space Administration
•
Filing: 1967-08-23
•
Granted: 1972-10-10
•
Expires: 1987-08-23
Abstract
Abstract A process for bonding a resinous body in a cavity is described including the steps of outgassing and freezing a body of normally liquid, uncured resinous material to form a void free body and fitting the frozen body into a cavity. Thereafter the frozen resinous material is thawed and the liquid conforms to the shape of the cavity. The resinous material is then cured in the cavity to provide a good bond to the walls thereof.
Inventors
- 👤 Stanley Y Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/58; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
A process as defined in claim 1 wherein the resinous material comprises a silicone resin curable in presence of water.
Claim 2
Dependent Claim
28 words
A process as defined in claim 2 wherein the cavity is in a cured resinous article so that resinous material in the cavity bonds to the surfaces thereof.
Claim 3
Dependent Claim
25 words
A process as defined in claim 2 wherein the cavity is undercut so that resinous material in the cavity is interlocked with the surfaces thereof.
Claim 4
Dependent Claim
158 words
A process for repairing a cured resinous article comprising: removing material from the article for forming a cavity therein; at least partly outgassing an uncured liquid resinous material; casting the uncured resinous material into a mold substantially the same size and shape as the cavity; outgassing the uncured resinous material in the mold; freezing and cooling the resinous material to approximately liquid nitrogen temperatures prior to complete curing thereof for solidifying and shrinking the cast body of resinous material; non-destructively testing the frozen body of resinous material for detection of flaws therein; inserting the frozen body of resinous material found to be free of flaws in said testing step into the cavity in the article; thawing the frozen body of resinous material in the cavity whereby the uncured resinous material conforms to the cavity; and curing the resinous material into a void free filling in the cavity whereby the resinous material bonds to the walls of the cavity.
Claim 5
Dependent Claim
33 words
A process as defined in claim 5 wherein the cured resinous article comprises an ablative heat shield and the uncured resinous material comprises an ablative silicone base elastomer curable in presence of water.
Claim 6
Dependent Claim
22 words
A process as defined in claim 5 wherein the cavity is undercut for providing a mechanical connection as well as a bond.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |