US4522529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-stressed fiber-resin sucker rod and method of making same
Assignee: Individual
•
Filing: 1982-11-26
•
Granted: 1985-06-11
•
Expires: 2002-11-26
Abstract
Abstract A sucker rod used in pumping liquids from subterranean oil or water wells is formed of plastic material having pre-stressed reinforcing fiber strands or roving therein, and a method of manufacturing same.
Inventors
- 👤 Edwin E. Conley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:58
CPC Classifications
B; B29; B29D; B29D1/00; B29D1/005; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/48; B29C70/54; B29C70/56; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29L; B29L2001/00; B29L2031/00; B29L2031/06; B29L2031/748; B29L2031/75; Y; Y10; Y10T; Y10T403/00; Y10T403/47
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
An elongated sucker rod having threaded ends and a substantially solid cross-section body therebetween, said rod comprised solely of curable plastic material having formed therein, prior to cure, a plurality of longitudinal fiber strands which have been pre-stressed and, said fiber strands in said solid body portion all lying substantially parallel to the longitudinal axis of said sucker rod, while the portions of said fibers adjacent said threaded ends follow the peaks and valleys of said threads in a longitudinal direction.
Claim 2
Dependent Claim
81 words
An elongated sucker rod having threaded ends and a substantially solid cross-section body therebetween, said rod comprised solely of curable plastic material having formed therein, prior to cure, a plurality of longitudinal fiber strands which have been pre-stressed and, said fiber strands in said solid body portion all lying substantially parallel to the longitudinal axis of said sucker rod, while the portions of said fibers adjacent said threaded ends follow the peaks and valleys of said threads in a longitudinal direction.
Claim 3
Dependent Claim
30 words
An improved sucker rod according to claim 1 which has a male threaded pin end portion at one end and a female threaded box end portion at the other end.
Claim 4
Dependent Claim
14 words
An improved sucker rod according to claim 1 wherein said threads are rounded threads.
References Cited (Backward Citations)
US2827414A
Cited
US4063838A
Cited
US4205926A
Cited
US4155791A
Cited
GB2037923A
Cited
GB2075625A
Cited
GB2100818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |