|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||180/009.21 ; 180/009.5|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 45 인용 특허 : 20|
A tractor includes a body frame (4), front wheels (3), propelling shafts (8) disposed in a rear portion of the body frame, and semicrawler units (10) for receiving drive from the propelling drive shafts. Each semicrawler unit includes a drive rolling element (11) attachable to one of the propelling drive shafts, an endless crawler track (15) driven by the drive rolling element and contacting the ground, driven rolling elements (13, 14) engaged by the endless crawler track, and a track frame (12) for supporting the driven rolling elements. The track frame...
[What is claimed is:] [1.]a body frame;front wheels;propelling drive shafts disposed in a rear portion of said body frame; andsemicrawler units receiving drive from said propelling drive shafts, respectively, each of said semicrawler units including:a drive rolling element attached to one of said propelling drive shafts;an endless crawler track driven by said drive rolling element and contacting a ground;driven rolling elements engaged by said endless crawler track; anda track frame supporting said driven rolling elements, said driven rolling elements di...