Patent ID: 6874305

Claim:
A lawn mower having selectively drivable wheels, comprising: dirigible front drive wheels; a pair of right and left rear drive wheels; a body frame; an engine supported by said body frame; a mower unit vertically movably supported by said body frame forwardly of said rear drive wheels; a change speed device for changing a speed of drive from said engine; a front wheel driving device for transmitting drive from said change speed device to said front wheels; a left rear wheel driving device for transmitting drive from said change speed device to a right axle of said left rear wheel, and a right rear wheel driving device for transmitting drive from said change speed device to a left axle of said right rear wheel; rear wheel clutches associated with said left rear wheel driving device and said right rear wheel driving device, respectively, for selectively connecting and disconnecting drive; and an interlocking mechanism for operating said rear wheel clutches in response to a displacement to said front drive wheels from a straight running posture, to disconnect drive transmission to one of said rear drive wheels moving along an inner track when the lawn mower makes a turn, said interlocking mechanism having a link mechanism operatively connecting a steering mechanism for steering said front drive wheels to each of said rear wheel clutches, and extending over said mower unit, wherein said link mechanism comprises a relay link operatively connected with said front wheels and a pair of levers operatively connected to said right rear wheel and said left rear wheel, said relay link coacting with said levers.