Patent US3586293A successfully refreshed from Google Patents.
US3586293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stringing of conductors
Assignee: Centro Ricerche Fiat SCpA
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Filing: 1968-03-07
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Granted: 1971-06-22
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Expires: 1988-03-07
Abstract
Abstract A device for balancing the tension in at least two conductors as they are fed out from feed drums comprising two braking drums each having at least one conductor passing thereover; a balanced hydraulic system having a pair of axles each connected to a corresponding drum; and a volumetric fluid pump connected to each axle. The fluid flow to each pump is controlled in order to brake the drums, and the fluid pressure is balanced by a balancing circuit in order to maintain equal tension in the conductors.
Inventors
- 👤 Walter Betta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:56
CPC Classifications
B; B21; B21F; B21F1/00; B21F1/02; B65; B65H; B65H59/00; B65H59/10; B65H59/16; H; H02; H02G; H02G1/00; H02G1/02; H02G1/04; H02G11/00; H02G11/02; B65H2555/00; B65H2555/20; B65H2555/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A device for balancing the tension of at least two conductors, as they are fed out from feed drums, by means of a drawing rope, in the stringing operation of a high-voltage line, said device cOmprising connection means for connecting said drawing rope to said conductors; two braking drums each having at least a conductor passing thereover in frictional engagement therewith; a balanced hydraulic system comprising a pair of axles, each operatively connected to a corresponding drum; a differential unit having the output shafts each operatively connected to an axle of said pair of axles, and the input shaft operatively connected to a volumetric fluid pump; fluid conduit means for supplying fluid to, and receiving fluid from, said pump, said conduit means being adapted to brake the flow of said fluid to control the braking of said drums through said pump and said differential unit, this latter unit equalizing the braking force on said axles to maintain equal tension in said conductors.
Claim 2
Independent Claim
162 words
A device for balancing the tension of at least two conductors, as they are fed out from feed drums, by means of a drawing rope, in the stringing operation of a high-voltage line, said device cOmprising connection means for connecting said drawing rope to said conductors; two braking drums each having at least a conductor passing thereover in frictional engagement therewith; a balanced hydraulic system comprising a pair of axles, each operatively connected to a corresponding drum; a differential unit having the output shafts each operatively connected to an axle of said pair of axles, and the input shaft operatively connected to a volumetric fluid pump; fluid conduit means for supplying fluid to, and receiving fluid from, said pump, said conduit means being adapted to brake the flow of said fluid to control the braking of said drums through said pump and said differential unit, this latter unit equalizing the braking force on said axles to maintain equal tension in said conductors.
Claim 3
Dependent Claim
49 words
A device according to claim 1, in which said fluid conduit means includes a main circuit with incompressible fluid; a nonreturn valve mounted in said circuit; a pilot valve for controlling the braking pressure of said fluid; and a heat exchanger mounted in said circuit for cooling said fluid.
Claim 4
Dependent Claim
45 words
A device according to claim 1, in which said conduit means further includes a secondary circuit; a blower for refrigerating the fluid circulating in the heat exchange, and means responsive to the pressure of the fluid flowing in said secondary circuit to actuate said blower.
Claim 5
Dependent Claim
126 words
The device of claim 1 as applied to the balancing of two pairs of said conductors, said connection means comprising a body means connected to said drawing rope, two loops of rope, each connected at its end to two cables of the same pair, at least one pulley associated with each loop, each pulley being freely mounted for rotation on said body means and engaging its associated loop, each said pulley enabling, through the action of the associated loop, an equal stretch two associated conductors when said drawing rope is pulled away from said feed drum; said differential unit comprising a balancing means for controlling the braking force and equally braking said drums to maintain equal tension between the first and second pairs of said conductors.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |