Patent US3614291A successfully refreshed from Google Patents.
US3614291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission line cable damper
Assignee: FCI USA LLC
•
Filing: 1969-08-14
•
Granted: 1971-10-19
•
Expires: 1989-08-14
Abstract
Abstract A damper for transmission line cables utilizes an outer body formed of concrete, and having an internal opening that functions as the cylinder of a fluid containing dashpot. A piston in the dashpot cylinder supports the weight of the concrete body through the intermediary of a spring in the cylinder, and a piston rod is fixed to the piston and extends out of the concrete body to be secured to a cable whose motion is to be damped. In a modification, the subassembly of a dashpot comprising a piston and piston rod, a spring and a fluid containing cylinder, is inserted into an opening of a weight mass formed of concrete, and the cylinder becomes an integral part of said weight mass.
Inventors
- 👤 John Pullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:33
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/52; H; H02; H02G; H02G7/00; H02G7/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
In a combination of the class described, a weight mass; a cylinder located bodily within said weight mass; a piston slidable in said cylinder; a fluid within said cylinder for damping sliding movement of the piston relative thereto; said cylinder having a closed end and an opposed sleeve end with a bore therethrough; a spring pressing said piston toward said closed end of said cylinder, and reacting against said sleeve end; a piston rod secured at one end thereof to said piston and having the other end thereof extending through the bore in said sleeve end outwardly of said cylinder and said weight mass; wherein said weight mass is adapted to move downwardly relative to the piston against the pressure of said spring when the piston is held in a position to support the cylinder and weight mass through the intermediary of said spring.
Claim 2
Dependent Claim
144 words
In a combination of the class described, a weight mass; a cylinder located bodily within said weight mass; a piston slidable in said cylinder; a fluid within said cylinder for damping sliding movement of the piston relative thereto; said cylinder having a closed end and an opposed sleeve end with a bore therethrough; a spring pressing said piston toward said closed end of said cylinder, and reacting against said sleeve end; a piston rod secured at one end thereof to said piston and having the other end thereof extending through the bore in said sleeve end outwardly of said cylinder and said weight mass; wherein said weight mass is adapted to move downwardly relative to the piston against the pressure of said spring when the piston is held in a position to support the cylinder and weight mass through the intermediary of said spring.
Claim 3
Dependent Claim
29 words
In the combination of claim 1, the feature that said weight mass Includes a through opening into which the cylinder may be inserted from one end of the opening.
Claim 4
Dependent Claim
31 words
In the combination of claim 1, means coupled to the end of said piston rod which extends outwardly of said cylinder and said weight mass, securing said rod to a conductor.
Claim 5
Dependent Claim
14 words
In combination of claim 1, the feature that said weight mass is a casting.
Claim 6
Dependent Claim
16 words
In the combination of claim 1, the feature that said casting is concrete or the like.
Claim 7
Dependent Claim
40 words
In the combination of claim 1, the feature that the other end of said piston rod is secured to a line cable and holds said piston in said position to support the weight mass through the intermediary of said spring.
Claim 8
Dependent Claim
122 words
In the combination of claim 1, the feature that said cylinder has a relatively large lower part forming the chamber in which said piston slides, and a relatively smaller upper sleeve part through which extends a piston rod secured at one end to the piston, and said opening in the weight mass being formed as a through opening so that said cylinder is insertable bodily into one end of the through opening with its sleeve part entering a relatively small portion of said opening as said relatively larger lower part enters a relatively larger portion of said opening, whereupon the cylinder member and weight mass are in stop relation relatively to one another so that the cylinder may support the weight mass.
Claim 9
Dependent Claim
39 words
In the combination of claim 1, the feature that said cylinder sleeve part extends outwardly of said weight mass, and a covering device fixed to said piston rod and sliding about said cylinder sleeve to shield the bore thereof.
Claim 10
Dependent Claim
39 words
In the combination of claim 7, the feature that said cylinder sleeve part extends outwardly of said weight mass, and a covering device fixed to said piston rod and sliding about said cylinder sleeve to shield the bore thereof.
Claim 11
Dependent Claim
31 words
In the combination of claim 1, the feature that said spring is a compression spring pressing at one end against said piston and at the other end thereof against said sleeve.
Claim 12
Dependent Claim
30 words
In the combination of claim 2, the feature that said opening and cylinder are shaped so that said cylinder strikes a stop surface as it is inserted into the opening.
Claim 13
Dependent Claim
48 words
In the combination of claim 3, the feature that the means securing the piston rod to the conductor allows relatively universal movement of said rod relatively to the conductor to a degree which will permit the rod to assume a vertical position in all attitudes of said conductor.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |