Patent ID: 6826895
Filing Date: 2004-12-07
Classification: A01D,B60L,Y02T

Abstract:
An electric lawn mower comprising:a machine body section having a cutter housing; one or more rechargeable battery units and an electric motor activatable by the battery units, the battery units and electric motor being mounted in the machine body section; a battery bracket secured to the cutter housing together as a unit with the electric motor to cover lateral sides and a top surface of the electric motor and having the battery units mounted thereon; a cutter blade disposed within the cutter housing and rotatably driven by the electric motor to cut grass; and a cover member collectively covering the battery units, the battery bracket and the electric motor, the cover member being shaped to progressively slant upward in a front-to-rear direction of the machine body section and having an opening formed in a lower front end portion thereof and an air vent formed in a rear end portion thereof to thereby permit ventilation from the opening to the air vent such that the battery units and the electric motor can be cooled; wherein the cutter housing defines a communication hole communicating with an interior space defined by the cover member; and when the cutter blade is rotating, the communication hole allows an air flow to be produced from the opening and air vent into the cutter housing to thereby cool the battery units and the electric motor in successions, but when the cutter blade is not rotating, the communication hole allows a reverse air flow to be produced from within the cutter housing to the air vent due to heat produced by at least one of the battery units and the electric motor.