Motor-operated grass cutter
US5140249A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S30/01
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An electric motor-operated grass cutter includes a housing; an electric motor; a plurality of cutting blades projecting from the housing, at least one of which is driven by the electric motor so as to reciprocate, and a chargeable storage battery connectable electrically with the electric motor. The storage battery also has a plurality of electrical contact lugs for charging. So that it can be charged safely and rapidly without disassembly the grass cutter also includes a charging socket mounted on the housing and accessible from the outside. The charging socket can have a plurality of additional contact lugs to facilitate electrical connection of a plug of an external charging device with the storage battery. The chargeable storage battery is structured so as to be quick-chargeable and external devices for quick-charging and trickle charging can be provided. A temperature contact lug can be provided for transmitting measured values of temperature for monitoring the quick charging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.