Patent US2821267A successfully refreshed from Google Patents.
US4030441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for connecting tugboat with ship to be tugged
Assignee: KOHAN SENDAN KIKAI KK
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Filing: 1975-11-17
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Granted: 1977-06-21
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Expires: 1995-11-17
Abstract
Abstract An electromagnet is secured to one end of a tug rope which is to be paid out from a tugboat towards a ship to be tugged, and the electromagnet consists of a plurality of relatively movable magnetic pole members, and hence the whole magnetic pole surface of the electromagnet is composed of a plurality of magnetic pole surfaces of said magnetic pole members. Thus, the end surfaces of said magnetic pole members may accommodate themselves to the curved surface or non-irregular surface of the hull of a ship to be tugged due to the relative, independent movements of the respective magnetic pole members, thereby bringing each of the end surfaces of the magnetic pole members into intimate contact therewith, whereby the end of the tug rope may be rigidly secured to the hull of the ship by means of the electromagnet thus facilitating connection of the tugboat with the ship to be tugged, in positive, safe and simple manner.
Inventors
- 👤 Toshio Nagata
- 👤 Kunijiro Kawasaki
- 👤 Ryuichiro Takahama
- 👤 Yoshifusa Miyatani
- 👤 Sozo Funakoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:12
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206; B; B63; B63B; B63B21/00; B63B21/56; B66; B66C; B66C1/00; B66C1/04; B66C1/06; B66C23/00; B66C23/18; B66C23/36; B66C23/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
A device for connecting a tugboat with a ship to be tugged thereby, comprising: a tug rope which may be paid out from said tugboat, and one end of which is secured to an anchor means mounted on said tugboat; an electromagnet adapted to secure one end of said tug rope to the hull of said ship and to which is secured the other end of said tug rope; said electromagnet including a casing having a beam member therein, a plurality of magnetic pole members each having a pair of opposing yokes and disposed in two rows in side-by-side relation within said casing, a plurality of electric coils for exciting said magnetic pole members and surrounding all of said yokes of said magnetic pole members, and a plurality of spring assemblies affixing said magnetic pole members to said beam member within said casing; said spring assemblies each having a rod pivoted to said magnetic pole member at its one end, and at least one coil spring surrounding said rod and located on said beam member, and elastic deformation of said coil spring permitting the movement of each of said magnetic pole members.
Claim 2
Independent Claim
192 words
A device for connecting a tugboat with a ship to be tugged thereby, comprising: a tug rope which may be paid out from said tugboat, and one end of which is secured to an anchor means mounted on said tugboat; an electromagnet adapted to secure one end of said tug rope to the hull of said ship and to which is secured the other end of said tug rope; said electromagnet including a casing having a beam member therein, a plurality of magnetic pole members each having a pair of opposing yokes and disposed in two rows in side-by-side relation within said casing, a plurality of electric coils for exciting said magnetic pole members and surrounding all of said yokes of said magnetic pole members, and a plurality of spring assemblies affixing said magnetic pole members to said beam member within said casing; said spring assemblies each having a rod pivoted to said magnetic pole member at its one end, and at least one coil spring surrounding said rod and located on said beam member, and elastic deformation of said coil spring permitting the movement of each of said magnetic pole members.
Claim 3
Independent Claim
195 words
A device for connecting a tugboat with a ship to be tugged thereby, comprising: a tug rope, one end of which is secured to said tugboat; an electromagnet, to which is secured the other end of said tug rope, said electromagnet being adapted to be drawn to the hull of said ship, when excited, said electromagnet including a plurality of magnetic pole members which are movable relative to each other; and means for supporting said electromagnet on said tugboat in a movable manner, and means for pushing said electromagnet, which is being supported on said tugboat, towards said ship to be tugged, said electromagnet supporting means including a frame consisting of a pair of posts pivoted to the deck of said tugboat and a tension rope, one end of which is secured to said deck, and supporting said posts in an inclined relation, and a chain block suspended from said frame and adapted to ascend and descend said electromagnet, and said electromagnet pushing means including a pair of power-driven pushing rods, which are engageable with said electromagnet which is supported by said frame in ascending and descending manner by the medium of said chain block.
Claim 4
Independent Claim
195 words
A device for connecting a tugboat with a ship to be tugged thereby, comprising: a tug rope, one end of which is secured to said tugboat; an electromagnet, to which is secured the other end of said tug rope, said electromagnet being adapted to be drawn to the hull of said ship, when excited, said electromagnet including a plurality of magnetic pole members which are movable relative to each other; and means for supporting said electromagnet on said tugboat in a movable manner, and means for pushing said electromagnet, which is being supported on said tugboat, towards said ship to be tugged, said electromagnet supporting means including a frame consisting of a pair of posts pivoted to the deck of said tugboat and a tension rope, one end of which is secured to said deck, and supporting said posts in an inclined relation, and a chain block suspended from said frame and adapted to ascend and descend said electromagnet, and said electromagnet pushing means including a pair of power-driven pushing rods, which are engageable with said electromagnet which is supported by said frame in ascending and descending manner by the medium of said chain block.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |