公开(公告)号：US3924704A

公开(公告)日：1975-12-09

申请号：US47529274

申请日：1974-05-31

Applicant: OSTBERGS FABRIKS AB

Inventor： LINDBLOM KARL THORE ,  FORSLUND ERIK TORSTEN

IPC: B60G17/019 ,  B62D21/18 ,  B62D49/06 ,  E02F9/02 ,  E02F9/16 ,  B60G17/00

CPC classification number: E02F9/166 ,  B60G17/01925 ,  B62D21/186 ,  B62D49/0635 ,  E02F9/024

Abstract: A terrain-going vehicle of the forked frame type, the stem fore end being supported by a front wheel shaft, and the fork legs being at each end supported by a different rear bogie shaft; said legs having their inner ends pivoted to the frame; the rear end of the frame, extending between the two fork legs, supports a movable fundament plate, and the fore end of the frame is rotatable around its longitudinal axis with respect to the rest of the frame; a hydraulic jack forming an upstanding telescopic bar connected between each leg and an associated point on said fundament plate, the two jacks being separately operable to keep the fundament plate level, even when driving along a lateral slant in the terrain and facilitating the overcoming of ground obstacles.

公开(公告)号：US3631906A

公开(公告)日：1972-01-04

申请号：US3631906D

申请日：1970-03-16

Applicant: OSTBERGS FABRIKS AB

Inventor： FORSLUND ERIK TORSTEN

IPC: A01G3/08 ,  B23D61/12 ,  A01G23/02

CPC classification number: B23D61/12 ,  A01G3/08 ,  Y10T83/9346

Abstract: Cutting blade for cutting trees by forcing the blade against the tree, according to which the forward edge of the blade is provided with key grooves of alternatingly opposed inclination forming straight and perpendicularly shearing partial edges extending in the direction of the forward edge of the blade and staggered relative to the central plane of the cutting blade.

Abstract translation: 切割刀片通过迫使刀片抵靠树木来切割树木，根据该切割刀片刀片的前边缘设置有交替相对的倾斜的键槽，其形成沿着刀片的前边缘的方向延伸的直的和垂直的剪切的部分边缘， 相对于切割刀片的中心平面交错。