US3682265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet vehicle
Assignee: Proterial Ltd
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Filing: 1970-05-13
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Granted: 1972-08-08
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Expires: 1990-05-13
Abstract
Abstract A magnet vehicle supportedly adhered to and adapted to run over an inclined wall surface of a structural member made of a strong magnetic material such as iron and steel, characterized in that said vehicle can be altered of its direction of travel as desired on said surface.
Inventors
- 👤 Michito Hiraoka
- 👤 Yoshihiko Hikita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:34
CPC Classifications
B; B63; B63B; B63B59/00; B63B59/06; B63B59/10; B23; B23K; B23K37/00; B23K37/02; B23K37/0264; B60; B60L; B60L13/00; B60L13/04; B61; B61C; B61C15/00; B61C15/04; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/26; B62D55/265; H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; Y; Y02; Y02T; Y02T30/00; Y10; Y10S; Y10S180/00; Y10S180/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A magnet vehicle for operating on the surface of iron or steel bodies, comprising a frame, a pair of endless track means located on opposite sides of said frame adapted to rotate in contact with the surface for frictional driving of the vehicle, lateral magnet means fixedly connected to said frame between tHe upper run and the lower run of said endless track means, central magnet means disposed centrally of said frame and cooperating with said lateral magnet means to keep the vehicle attracted on the surface by the magnetic force thereof, said central magnet means including means for automatically providing and adjusting the clearance between the central magnet means and the surface to maintain a constant attraction force between the lower end of the central magnet means and the surface, and motor means for driving said endless track means.
Claim 2
Dependent Claim
140 words
A magnet vehicle for operating on the surface of iron or steel bodies, comprising a frame, a pair of endless track means located on opposite sides of said frame adapted to rotate in contact with the surface for frictional driving of the vehicle, lateral magnet means fixedly connected to said frame between tHe upper run and the lower run of said endless track means, central magnet means disposed centrally of said frame and cooperating with said lateral magnet means to keep the vehicle attracted on the surface by the magnetic force thereof, said central magnet means including means for automatically providing and adjusting the clearance between the central magnet means and the surface to maintain a constant attraction force between the lower end of the central magnet means and the surface, and motor means for driving said endless track means.
Claim 3
Dependent Claim
29 words
A magnet vehicle as defined in claim 1, in which said lateral magnet means are comprised of permanent magnets and said central magnet means is comprised of an electromagnet.
Claim 4
Dependent Claim
102 words
A magnet vehicle, as defined in claim 1, in which said means for automatically adjusting the clearance includes a screw fixedly connected to the central magnet means and extending to the direction substantially perpendicular to the plane defined by the lower runs of the two endless tracks, a worm wheel having a central bore threaded for engagement with said screw, a worm gear secured fixedly to the frame for engagement with said worm wheel, and drive means for rotating the worm gear and thereby displacing the central magnet means via said worm wheel and screw in the direction perpendicular to said plane.
Claim 5
Dependent Claim
73 words
A magnet vehicle as defined in claim 3, in which said means for automatically adjusting the clearance includes limit switch means attached to the lower portion of a yoke in which the coil of said central magnet means is mounted, for automatically activating said drive means to adjust the clearance between the lower end of the central magnet means and the surface so as to maintain a constant predetermined magnetic attraction force therebetween.
Claim 6
Dependent Claim
31 words
A magnet vehicle as defined in claim 1, in which said motor means comprises a pair of motors each adapted to independently drive one of said pair of endless track means.
Claim 7
Dependent Claim
151 words
A magnet vehicle for operating on the surface of iron or steel bodies comprising a frame, a pair of lateral magnet means fixedly disposed on opposite sides of said frame at a distance from the surface adapted to magnetically attract the vehicle to the surface, a pair of endless track means each surrounding one of said lateral magnet means adapted to rotate with respect thereto in contact with the surface to frictionally drive the vehicle, central magnet means disposed centrally of said frame and cooperating with said lateral magnetic means to keep the vehicle attracted on the surface by the magnetic force thereof, said central magnet means including means for automatically providing and adjusting the clearance between the central magnet means and the surface to maintain a constant attraction force between the lower end of the central magnet means and the surface, and motor means for driving said endless track means.
Claim 8
Dependent Claim
151 words
A magnet vehicle for operating on the surface of iron or steel bodies comprising a frame, a pair of lateral magnet means fixedly disposed on opposite sides of said frame at a distance from the surface adapted to magnetically attract the vehicle to the surface, a pair of endless track means each surrounding one of said lateral magnet means adapted to rotate with respect thereto in contact with the surface to frictionally drive the vehicle, central magnet means disposed centrally of said frame and cooperating with said lateral magnetic means to keep the vehicle attracted on the surface by the magnetic force thereof, said central magnet means including means for automatically providing and adjusting the clearance between the central magnet means and the surface to maintain a constant attraction force between the lower end of the central magnet means and the surface, and motor means for driving said endless track means.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |