US4979794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction reduction in drawing optical cable into protective tubes
Assignee: Individual
•
Filing: 1989-04-20
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Granted: 1990-12-25
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Expires: 2009-04-20
Abstract
Abstract An outer protective tube into which a fiber optic cable is drawn under tension having a multiplicity of protruberances on its inside surface presenting a corresponding multiplicity of discrete spaced non-linear sliding surfaces to said cable to reduce friction and the tension imposed on the cable.
Inventors
- 👤 Mike R. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:12
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/46; G02B6/50; G02B6/44; G02B6/4479
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A method of drawing a flexible fiber optic cable of indefinitely extended length into a flexible protective outer tube to loosely sheath the cable within the tube which comprises (a) disposing a pull-line throughout the length of the outer tube, (b) attaching one end of the pull-line to an end of the fiber optic cable, and (c) pulling the cable from one end under tension into the outer tube in sliding contact with a multiplicity of discrete spaced non-linear sliding surfaces presented to the cable by a corresponding multiplicity of protruberances on the interior surface of the outer tube.
Claim 2
Independent Claim
99 words
A method of drawing a flexible fiber optic cable of indefinitely extended length into a flexible protective outer tube to loosely sheath the cable within the tube which comprises (a) disposing a pull-line throughout the length of the outer tube, (b) attaching one end of the pull-line to an end of the fiber optic cable, and (c) pulling the cable from one end under tension into the outer tube in sliding contact with a multiplicity of discrete spaced non-linear sliding surfaces presented to the cable by a corresponding multiplicity of protruberances on the interior surface of the outer tube.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the protruberances are of rounded convex shape.
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) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |