US4685831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and methods for removing underground cable
Assignee: LABARGE PIERRE L JR 707 NORTH SECOND ST ST LOUIS MO 63102
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Filing: 1985-09-30
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Granted: 1987-08-11
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Expires: 2005-09-30
Abstract
Abstract A cable removing apparatus having a sheave with a fixed, annular, channel-shaped circumferential groove which is intermittently interrupted. The cable is held in frictional engagement with a portion of the circumference of the sheave. A motor is provided for rotating the sheave with the cable engaged in the channel-shaped groove thereof so as to cause the cable to pass about a portion of the circumference of the sheave. In one embodiment, a plurality of teeth are formed in the groove to penetrate the cable to assist in gripping it for removal. Also disclosed is a method utilizing the apparatus to remove continuous lengths of underground cable.
Inventors
- 👤 Robert L. Mahoney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:12
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08; Y; Y10; Y10T; Y10T83/00; Y10T83/343
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
An apparatus for removing underground cable, such as telephone cable and the like having a core of conductors surrounded by a sheath, the apparatus comprising: a sheave; a plurality of generally U-shaped flanges equally spaced about the circumference of the sheave, the flanges extending radially outwardly from the sheave and forming a curved channel-shaped periphery on the sheave; two semi-circular members removably secured over the flanges, the members forming a ring in the curved channel-shaped periphery of the sheave; a plurality of plates extending radially outwardly from the semi-circular members, each plate having a v-shaped notch therein, the notches in the plates defining a discontinuous v-shaped groove around the circumference of the sheave for frictionally gripping the cable; at least one roller; means for moving the roller toward the sheave to insure that the cable is held in the v-shaped groove; means for rotating the sheave with the cable gripped in the v-shaped groove to pull the cable around a portion of the circumference of the sheave.
Claim 2
Independent Claim
167 words
An apparatus for removing underground cable, such as telephone cable and the like having a core of conductors surrounded by a sheath, the apparatus comprising: a sheave; a plurality of generally U-shaped flanges equally spaced about the circumference of the sheave, the flanges extending radially outwardly from the sheave and forming a curved channel-shaped periphery on the sheave; two semi-circular members removably secured over the flanges, the members forming a ring in the curved channel-shaped periphery of the sheave; a plurality of plates extending radially outwardly from the semi-circular members, each plate having a v-shaped notch therein, the notches in the plates defining a discontinuous v-shaped groove around the circumference of the sheave for frictionally gripping the cable; at least one roller; means for moving the roller toward the sheave to insure that the cable is held in the v-shaped groove; means for rotating the sheave with the cable gripped in the v-shaped groove to pull the cable around a portion of the circumference of the sheave.
Claim 3
Dependent Claim
41 words
The apparatus according to claim 1 further comprising at least one tooth in the bottom of each v-shaped notch, the tooth adapted to penetrate the cable and grapple the core so that the sheathing does separate from the core during removal.
Claim 4
Dependent Claim
39 words
The apparatus according to claim 2 wherein there is one tooth extending radially outwardly from the bottom of each v-shaped notch, the tooth adapted to penetrate the cable to between about 25% and about 35% of the cable diameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |