US3629028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making self-lubricating filament wound tube
Assignee: Universal Oil Products Co
•
Filing: 1969-07-29
•
Granted: 1971-12-21
•
Expires: 1989-07-29
Abstract
Abstract A method of making a filament wound tube having smooth surfaces. Fiber glass filaments are passed through successive resin baths containing particles of a wear resistant additive. These resin baths are deaerated to reduce the existence of voids and pits in the resin in the finished tube. The filaments are flattened and are slowly helically wound in a first layer onto a mandrel. Subsequent layers are overwound about the first layer, the resin is cured, and the filament wound tube formed thereby is removed from the mandrel.
Inventors
- 👤 Jack Lowrie Mclarty
- 👤 Charles M Hayes
- 👤 Edwin J Latos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:49
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/8016; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29B15/125; B29C53/8066; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
24 words
The method of claim 1 further characterized in that said mandrel is heated to a temperature of from about 180* to about 300* F.
Claim 2
Dependent Claim
28 words
The method of claim 1 further characterized in that deaeration is effected by heating said resin baths to a temperature of from about 180* to about 300* F.
Claim 3
Dependent Claim
20 words
The method of claim 1 further characterized in that deaeration is effected by subjecting said resin baths to ultrasonic vibration.
Claim 4
Dependent Claim
27 words
The method of claim 4 further characterized in that said ultrasonic vibration is at a frequency of from 20,000 cycles per second to 50,000 cycles per second.
Claim 5
Dependent Claim
16 words
The method of claim 1 further characterized in that said wear resistant additive is molybdenum disulfide.
Claim 6
Dependent Claim
15 words
The method of claim 1 further characterized in that said wear resistant additive is graphite.
Claim 7
Dependent Claim
16 words
The method of claim 1 further characterized in that said wear resistant additive is titanium dioxide.
Claim 8
Dependent Claim
15 words
The method of claim 1 further characterized in that said wear resistant additive is mica.
Claim 9
Dependent Claim
18 words
The method of claim 1 further characterized in that said wear resistant additive is finely divided metallic copper.
Claim 10
Dependent Claim
36 words
The method of claim 1 further characterized in that said first layer of said fiber glass filaments is wound onto said mandrel at a filament speed of from about 5 to about 10 feet per minute.
Claim 11
Dependent Claim
17 words
The method of claim 1 further characterized in that said thermosetting plastic resin is an epoxy resin.
Claim 12
Dependent Claim
24 words
The method of claim 1 further characterized in that said closely spaced guides are comprised of rollers, spaced within 4 inches of each other.
Claim 13
Dependent Claim
24 words
The method of claim 1 further characterized in that said closely spaced guides are comprised of bars, spaced within 4 inches of each other.
Claim 14
Dependent Claim
31 words
The method of claim 14 further characterized in that said filaments are bent across the arc of a ring in the distributing arm of be flattened into a band of filaments.
Claim 15
Dependent Claim
40 words
The method of claim 15 further characterized in that a squeegy is positioned against said filaments as they are bent across the arc of the aforesaid ring, thereby further reducing the air entrained in the aforesaid coated fiber glass filaments.
Claim 16
Dependent Claim
36 words
The method of claim 1 further characterized in that there are rollers in said resin baths, and said filaments pass between said rollers, and said rollers vibrate in said resin baths thereby deaerating said resin baths.
Claim 17
Dependent Claim
36 words
The method of claim 1 further characterized in that there are bars in said resin baths, and said filaments pass between said bars, and said bars vibrate in said resin baths thereby deaerating said resin baths.
Claim 18
Dependent Claim
22 words
The method of claim 1 further characterized in that said mandrel is coated with a resin release agent prior to filament winding.
References Cited (Backward Citations)
US3042569A
Cited
US3158519A
Cited
US3258379A
Cited
US3281299A
Cited
US3366522A
Cited
US3484317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |