US4913258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric vehicle
Assignee: Tokyo R&D Co Ltd
•
Filing: 1988-10-25
•
Granted: 1990-04-03
•
Expires: 2008-10-25
Abstract
Abstract An electric vehicle which has motor wheels of the direct-drive outer-rotor type which permit simplification and compaction of the motor wheels. Current regulating covers introduce ambient air for cooling the motors and reduce air resistance, and batteries and control devices are disposed symmetrically relative to the axial line of the vehicle body and to axial lines of the axles so as to reduce and uniformly distribute the weight of the vehicle. All these devices contribute jointly to increasing the range of the electric vehicle.
Inventors
- 👤 Hiroshi Sakurai
- 👤 Masao Ono
- 👤 Atsushi Mamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:15
CPC Classifications
B; B60; B60K; B60K7/00; B60K7/0007; B60K17/00; B60K17/30; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/66; H; H02; H02K; H02K7/00; H02K7/14; B60K1/00; B60K2001/003; B60K2007/0038; B60K2007/0092; B60L2220/00; B60L2220/40; B60L2220/44; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An outer-rotor type motor wheel, comprising: a knuckle, a hub coaxially interlocked with said knuckle, a wheel disc rotatably attached to the periphery of said hub, a wheel secured to the periphery of said wheel disc, a rotor fastened to an outer side of said wheel disc from the direction of said outer side, and a stator coaxial to and spaced from said rotor by a small gap and fastened to said hub from said direction of said outer side.
Claim 2
Dependent Claim
80 words
An outer-rotor type motor wheel, comprising: a knuckle, a hub coaxially interlocked with said knuckle, a wheel disc rotatably attached to the periphery of said hub, a wheel secured to the periphery of said wheel disc, a rotor fastened to an outer side of said wheel disc from the direction of said outer side, and a stator coaxial to and spaced from said rotor by a small gap and fastened to said hub from said direction of said outer side.
Claim 3
Dependent Claim
51 words
A wheel as in claim 1, further comprising motor cooling means including a communication path defined by empty spaces within said knuckle and said hub and having an outer opening, and a current regulating cover attached to said outer opening and including an air inlet in communication with said communicating path.
Claim 4
Dependent Claim
22 words
A wheel as in claim 2, wherein said motor cooling means further includes a motor cooling fan disposed inside said communicating path.
Claim 5
Dependent Claim
50 words
A wheel as in claim 1, wherein at least one battery for supply of electricity and control means for control of said motor wheel are disposed in proximity to said motor wheel, and said at least one battery, said control means and said motor wheel are interconnected with power lines.
Claim 6
Dependent Claim
42 words
An electric vehicle in combination with a plurality of wheels as in claim 4, wherein said at least one battery and said control means are severally disposed symmetrically relative to the central axial line in the longitudinal direction of said electric vehicle.
References Cited (Backward Citations)
US2506146A
Cited
FR1478059A
Cited
JPS4718010U
Cited
JPS4838506A
Cited
FR2169611A5
Cited
US3937293A
Cited
US4021690A
Cited
JPS5222214A
Cited
JPS5421312U
Cited
FR2561593A1
Cited
JPS62295772A
Cited
US4760891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |