Patent US3699708A successfully refreshed from Google Patents.
US3699708A
Expired / Lapsed
US
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Electric-powered model airplane
Assignee: Mabuchi Motor Co Ltd
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Filing: 1971-12-01
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Granted: 1972-10-24
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Expires: 1991-12-01
Abstract
Abstract A novel electric-powered model airplane is for the first time disclosed which has an electric motor for driving a propeller and a specific dry cell mounted thereon, said dry cell being of a high capacity, small size and light weight and, if desired, encased in a case with a plurality of openings or fins for heat radiation. The model airplane may be provided with a remote control device, if desired. Thus, the present model airplane can be simply operated and affords enjoyment to adults as well as children.
Inventors
- 👤 Kenichi Mabuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:43
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
An electric-powered model airplane capable of flying which comprises a body; wings; a tail fin; stabilizers; a propeller rotatably mounted on the body at its forward portion, a miniature electric motor having a shaft connected to a shaft of the propeller, a case encasing a small-sized dry cell having an electrical connection to the electric motor through a switch means.
Claim 2
Dependent Claim
60 words
An electric-powered model airplane capable of flying which comprises a body; wings; a tail fin; stabilizers; a propeller rotatably mounted on the body at its forward portion, a miniature electric motor having a shaft connected to a shaft of the propeller, a case encasing a small-sized dry cell having an electrical connection to the electric motor through a switch means.
Claim 3
Dependent Claim
31 words
An electric-powered model airplane as claimed in claim 1, wherein said case is disposed in a position in which the case is exposed to air flow to cool the dry cell.
Claim 4
Dependent Claim
32 words
An electric-powered model airplane as claimed is claim 1, wherein said case is provided with a plurality of openings and/or fins, thereby enabling heat generated from the dry cell to be radiated.
Claim 5
Dependent Claim
15 words
An electric-powered model airplane as claimed in claim 1, wherein the dry cell is rechargeable.
Claim 6
Dependent Claim
19 words
An electric-powered model airplane as claimed in claim 4, further comprising recharging terminals in the wall of the body.
Claim 7
Dependent Claim
37 words
An electric-powered model airplane as claimed in claim 1, further comprising a wireless control device for controlling the switch means, a rudder of the tail fin, an aileron of the wings and/or an elevator of the stabilizers.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |