US4955560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro motor helicopter
Assignee: Individual
•
Filing: 1989-03-30
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Granted: 1990-09-11
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Expires: 2009-03-30
Abstract
Abstract An electromotor helicopter is provided in which a downward maneuvering of the helicopter will operate a propeller directly connected to a generator to regenerate a battery carried in the helicopter while another battery operates a drive assembly of the helicopter. A switching system can alternately cause the generator to regenerate one battery while other battery operates the drive assembly.
Inventors
- 👤 Edward T. Nishina
- 👤 George Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/30; B64D27/34; B64D27/35; B64D27/357; B64D35/00; B64D35/02; B64D35/021; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
An electromotor helicopter having a fuselage and drive assembly further comprising: (a) a pair of batteries in which said first battery is used as a source of electrical energy to supply power to said drive assembly of the helicopter while said second battery is held in reserve to be recharged; (b) a propeller having a drive shaft rotatably mounted on said fuselage; (c) a generator mechanically connected to said drive shaft and electrically connected to said second battery so that a downward maneuvering of the helicopter will cause said propeller to turn said drive shaft to operate said generator for recharging said second battery; and (d) means for changing the electrical positions of said batteries so that said second battery can now be electrically connected to the drive assembly while said first battery can now be placed in reserve to be recharged by said generator.
Claim 2
Dependent Claim
145 words
An electromotor helicopter having a fuselage and drive assembly further comprising: (a) a pair of batteries in which said first battery is used as a source of electrical energy to supply power to said drive assembly of the helicopter while said second battery is held in reserve to be recharged; (b) a propeller having a drive shaft rotatably mounted on said fuselage; (c) a generator mechanically connected to said drive shaft and electrically connected to said second battery so that a downward maneuvering of the helicopter will cause said propeller to turn said drive shaft to operate said generator for recharging said second battery; and (d) means for changing the electrical positions of said batteries so that said second battery can now be electrically connected to the drive assembly while said first battery can now be placed in reserve to be recharged by said generator.
Claim 3
Dependent Claim
44 words
An electromotor helicopter as recited in claim 1, wherein said electrical changing means is a double-pole double-throw switch with two arms and terminals in which one arm is electrically connected to the drive assembly while the other arm is electrically connected to said generator.
Claim 4
Dependent Claim
84 words
An electromotor helicopter as recited in claim 2, further comprising: (a) a solenoid mechanically connected to the arms of said switch; and (b) a current sensor circuit electrically connected between said selenoid and said batteries so that one of said batteries being recharged reaches a predetermined charge said current sensor circuit will be activated operating said solenoid, so as to move said arms of said switch and change the electrical positions of said batteries which are electrically connected to the terminals of said switch.
Claim 5
Dependent Claim
65 words
An electromotor helicopter as recited in claim 3, further comprising: (a) the fuselage having a recess in which said propeller is rotatably mounted therein and a side with a vent opening; (b) an air vent extending from said recess to said opening; (c) a one way valve mounted at said opening so that said propeller will only turn during the downward maneuvering of the helicopter.
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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |