|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||180/234; 180/304; 180/024.07|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 8 인용 특허 : 5|
A mower having a cutting deck for cutting grass has four drive wheels arranged in a square or rectangular configuration on the mower's frame. Four wheel drive and four wheel steering are employed with the drive wheels. The four wheel drive is provided by a hydraulic drive system that employs a pair of identical serial circuits which have their own pumps with each pump serially sending its output through a rear drive motor and a front drive motor that are catty-corner to one another on the frame, i.e. are on opposite sides of the motor. Various flow cross...
1. A mower with four wheel drive, which comprises: (a) a frame supported for rolling over the ground by four ground engaging drive wheels comprising a pair of laterally spaced front drive wheels and a pair of laterally spaced rear drive wheels;(b) a grass cutting device carried on the frame; and(c) a hydraulic drive system for propelling the drive wheels, which comprises: (i) a plurality of individual hydraulic drive motors for rotating the drive wheels with one drive motor being operatively connected to each of the drive wheels such that the plurality o...