Patent US3573348A successfully refreshed from Google Patents.
US3573348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutrally buoyant vertical underwater cable
Assignee: Individual
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Filing: 1969-04-25
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Granted: 1971-04-06
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Expires: 1989-04-25
Abstract
Abstract A cable for vertical suspension underwater and essentially neutrally buoyant at all depths has a core of material of slightly less specific gravity than the water and a surrounding sleeve element of higher specific gravity than the water, the weight and/or the water/displacing relation of said core and sleeve elements being adjustable to provide neutral buoyancy of the cable at its various depths when vertically suspended under force of a weight.
Inventors
- 👤 Edward M Herrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:01
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/04; H01B7/045; D; D07; D07B; D07B1/00; D07B1/14; D07B1/147; D07B1/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
A cable for vertical orientation in sea water and to which a load may be attached, said cable being neutrally buoyant for substantially its entire length to a predetermined depth in the sea water and comprising: first elongated body means composed of material having flexibility for winding on a winch, said material having a specific gravity less than the specific gravity of water; second elongated flexible body means surrounding said first body means for substantially the entire cable length; said second body means being of essentially constant specific gravity greater than the specific gravity of water; said second body means being disposed along said first body means in decreasing amount by weight in air per unit length of the cable in proportion to the sea water depth of the cable; and whereby the composite specific gravity of the cable when in use at all depths is essentially that of water.
Claim 2
Dependent Claim
150 words
A cable for vertical orientation in sea water and to which a load may be attached, said cable being neutrally buoyant for substantially its entire length to a predetermined depth in the sea water and comprising: first elongated body means composed of material having flexibility for winding on a winch, said material having a specific gravity less than the specific gravity of water; second elongated flexible body means surrounding said first body means for substantially the entire cable length; said second body means being of essentially constant specific gravity greater than the specific gravity of water; said second body means being disposed along said first body means in decreasing amount by weight in air per unit length of the cable in proportion to the sea water depth of the cable; and whereby the composite specific gravity of the cable when in use at all depths is essentially that of water.
Claim 3
Dependent Claim
16 words
The cable of claim 1 wherein one of said body means further includes electrically conductive means.
Claim 4
Dependent Claim
36 words
The cable of claim 1 wherein said second elongated body means is essentially incompressible and comprises a helical winding the pitch of which increases in relation to the depth of said cable in said sea water.
Claim 5
Dependent Claim
68 words
The cable of claim 1 wherein said first elongated body means comprises a continuous cylindrical body means and said second body means comprises sleeve means surrounding said cylindrical body means, the ratio of said cylindrical body means material to said sleeve means material in transverse cross section increasing with greater depth to thereby provide a specific gravity of essentially that of water for the cable at all depths.
Claim 6
Dependent Claim
18 words
The cable of claim 4 wherein said sleeve means comprises a rubber sleeve having longitudinal strength members therein.
Claim 7
Dependent Claim
14 words
The cable of claim 5 wherein said longitudinal strength member comprise electrically conductive material.
Claim 8
Dependent Claim
14 words
The cable of claim 3 wherein said helical winding comprises insulated electrically conductive material.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |