US4942723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar powered lawnmower
Assignee: Individual
•
Filing: 1989-09-21
•
Granted: 1990-07-24
•
Expires: 2009-09-21
Abstract
Abstract A solar powered lawnmower is disclosed comprising an electric motor, a rechargeable battery pack, and a panel of photovoltaic cells built into the handle of the lawnmower. The angle of the handle is arranged to ensure that the photovoltaic cells will receive nearly maximal solar exposure when the lawnmower is left in the sun with the angle of the handle approximately perpendicular to the sun's rays. In case of insufficient photovoltaic recharging, the solar powered lawnmower comprises the means to employ standard AC current to recharge the battery pack. The solar powered lawnmower is used to mow a lawn without generating air pollution or excessive noise pollution.
Inventors
- 👤 Stephen R. Wassell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:38
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/76; A01D34/78; A01D69/00; A01D69/02; Y; Y02; Y02P; Y02P60/00; Y02P60/12; Y10; Y10S; Y10S136/00; Y10S136/291
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A lawnmower comprising, in combination, an electric motor, a rechargeable battery park, and a panel of photovoltaic cells, with said motor, said battery pack, and said photovoltaic cells electrically connected, which has said photovoltaic cells positioned in the region of the lawnmower defined by the perimeter of the handle of the lawnmower so that said photovoltaic cells are tilted at the same angle as the handle, with the angle arranged to be approximately perpendicularr to the rays of the sun during periods of solar exposure to said photovoltaic cells, which has said battery pack recharged with the electricity generated by said photovoltaic cells when the lawnmower is placed in the sunlight, so that said battery pack then possesses the means to power said electric motor.
Claim 2
Dependent Claim
125 words
A lawnmower comprising, in combination, an electric motor, a rechargeable battery park, and a panel of photovoltaic cells, with said motor, said battery pack, and said photovoltaic cells electrically connected, which has said photovoltaic cells positioned in the region of the lawnmower defined by the perimeter of the handle of the lawnmower so that said photovoltaic cells are tilted at the same angle as the handle, with the angle arranged to be approximately perpendicularr to the rays of the sun during periods of solar exposure to said photovoltaic cells, which has said battery pack recharged with the electricity generated by said photovoltaic cells when the lawnmower is placed in the sunlight, so that said battery pack then possesses the means to power said electric motor.
Claim 3
Dependent Claim
29 words
The lawnmower according to claim 1, which further comprises the means to employ standard AC current in order to recharge said battery pack in case of insufficient photovoltaic recharging.
References Cited (Backward Citations)
US3212244A
Cited
US3404519A
Cited
US3444946A
Cited
US3729912A
Cited
US4141425A
Cited
US4311204A
Cited
US4333302A
Cited
DE3347054A1
Cited
US4719742A
Cited
US4602694A
Cited
JPS6393173A
Cited
US4744430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |