US3607361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balloon backing for pipe lining
Assignee: Bonded Products Inc
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Filing: 1968-11-15
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Granted: 1971-09-21
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Expires: 1988-11-15
Abstract
Abstract Balloon inserted through gas pipe, inflated in gas main beyond angle fitting, deflated and withdrawn thereinto, reinflated and lining material charged thereagainst at greater pressure. Pressure indicated on outside gauge verifies position of balloon.
Inventors
- 👤 Hanford Z Hight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
B; B05; B05C; B05C7/00; B05C7/04; B05C7/06; B05C7/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
Method as claimed in claim 1, in which said deflated balloon is inserted by a flexible pusher to bend around inside said angle fitting to pass therebeyond, and said deflated balloon is inflated by turning on the pressure into a supply tube therefor extending from said outer end.
Claim 2
Dependent Claim
44 words
Method as claimed in claim 1, in which said inserted balloon is first inflated by turning on supply pressure thereto and immediately turning off said pressure, and expansion of said balloon holding the same against the rim of said far end with some tension.
Claim 3
Dependent Claim
82 words
Method as claimed in claim 1, in which prior to insertion of said balloon, pusher and tube, the supply pressure thereto is turned on to start inflation thereof and immediately turned off, the expansion reducing the pressure therein to a low value which is recorded and the balloon then deflected, and after insertion when the balloon is again inflated and expanded against the far end, the expansion pressure is compared to the recorded pressure to verify the desired location of the balloon.
Claim 4
Dependent Claim
49 words
Method as claimed in claim 1, in which the lining material is contained in a cylinder which follows said flexible pusher, and a higher pressure than that in said balloon is applied to said cylinder to propel the charge therefrom against the balloon and the inside of the fitting.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |