IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0441267
(1982-11-12)
|
우선권정보 |
NL-19770007261 (1977-06-30) |
발명자
/ 주소 |
|
대리인 / 주소 |
Pravel, Gambrell, Hewitt & Kimball
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
0 |
초록
▼
An endless tract for a tractor having steerable forward wheels and rear twin wheels on each side in tandem, the endless track received by each pair of rear twin wheels. The track has a plurality of embedded bars or strips, each of which is formed with inwardly directed projections, has the shape of
An endless tract for a tractor having steerable forward wheels and rear twin wheels on each side in tandem, the endless track received by each pair of rear twin wheels. The track has a plurality of embedded bars or strips, each of which is formed with inwardly directed projections, has the shape of an inverted blunted V and is arranged to be received between the pneumatic tires of the twin wheels. Connected on the outside of the endless belts to the interior bars by bolts are transverse ridges extending across the belt and being profiled so as to be inclined downwardly and forwardly relative to the ground whereby the ridges in operation exert traction in the ground in a downwardly inclined direction, the ridges being made of rubber-like material or steel or both and the inclination of the ridges between 20° and 45° relative to the overlying belt and the ground's surface.
대표청구항
▼
1. An agricultural vehicle included in the group which comprises tractors, soil cultivating machines, and the like which include a lifting device, the vehicle comprising an engine and power train extending therefrom, said vehicle having a track arranged around at least two pneumatic tires mounted on
1. An agricultural vehicle included in the group which comprises tractors, soil cultivating machines, and the like which include a lifting device, the vehicle comprising an engine and power train extending therefrom, said vehicle having a track arranged around at least two pneumatic tires mounted on ground wheels of the vehicle which are arranged in tandem, the axles of said wheels supported in a beam whereby the distance between said axles is constant, said track comprising a belt having a width which is uninterrupted for at least the entire width of said tires' tread and a plurality of outwardly extending profiles and inwardly extending teeth mounted thereon, each said profile consisting entirely of metal and as viewed from the side having a height which exceeds its width, each said profile being S-shaped with the lower leg of the "S" being flat and extending substantially parallel to the portion of said belt from which it extends, said teeth engaging said tires for driving said track and, viewed from one side, the width of each of said teeth being larger than the distance between two adjacent said teeth, each of said teeth rigidly connected to one of said profiles, only the rearmost of said ground wheels being connected to said power train whereby it is driven by said engine and the forward of said ground wheels is driven by said belt, said belt being embedded with longitudinally extending steel wires of such a character that it is relatively inelastic in the longitudinal direction, said belt being in a state of tension wherever it contacts the ground when said vehicle is being driven forward and said profiles exerting rearwardly and downwardly inclined forces on the upper layer of the ground of such a character that packing of the soil is substantially reduced. 2. A track for an agricultural vehicle included in the group which comprises tractors, soil cultivating machines, and which include a lifting device, an engine and power train extending therefrom, at least two pneumatic tires mounted on the vehicle's ground wheels which are arranged in tandem, the axles of said wheels supported in a beam whereby the distance between said axles is constant, the track comprising a belt arranged around said pneumatic tires and having a width which is uninterrupted for at least the entire width of said tires' tread, a plurality of outwardly extending profiles and inwardly extending teeth mounted on said belt, said profiles consisting entirely of metal and being hook-shaped when viewed from the side, said teeth engaging said tires for driving the track and, viewed from one side, the width of each of said teeth being larger than the distance between two adjacent said teeth, each of said teeth rigidly connected to one of said profiles, only the rearmost of said ground wheels being connected to said power train whereby it is driven by said engine and the forward of said ground wheels is driven by said belt, said belt being embedded with longitudinally extending steel wires of such a character that it is relatively inelastic in the longitudinal direction, when the vehicle is moving forward said belt contacting the ground and being in a state of tension where it so contacts the ground and said profiles penetrating into the ground so that their rearwardly and downwardly inclined forces exerted on the soil in the upper layer of the ground are of a character that harmful packing which causes a disadvantageous soil structure is substantially reduced and scraping off of its upper layer is generally avoided. 3. A track for an agricultural vehicle included in the group which comprises tractors, soil cultivating machines, and which include a lifting device, an engine and power train extending therefrom, at least two pneumatic tires mounted on the vehicle's ground wheels which are arranged in tandem, the axles of said wheels supported in a beam whereby the distance between said axles is constant, the track comprising a belt arranged around said pneumatic tires and having a width which is uninterrupted for at least the entire width of said tires' tread, a plurality of outwardly extending profiles and inwardly extending teeth mounted on said belt, each said profile having a substantially coplanar and soil contacting side which has an inclination relative to a line perpendicular to said belt in a range of about 20° to 45° as seen from the side, said profiles being S-shaped with the lower leg of the "S" extending substantially parallel to the portions of said belt from where the corresponding said profile extends, said teeth engaging said tires for driving the track and, viewed from one side, the width of each of said teeth being larger than the distance between two adjacent said teeth, each of said teeth rigidly connected to one of said profiles, only the rearmost of said ground wheels being connected to said power train whereby it is driven by said engine and the forward of said ground wheels is driven by said belt, said belt being embedded with longitudinally extending steel wires of such a character that it is relatively inelastic in the longitudinal direction, when the vehicle is moving forward the run of said belt contacting the ground being in a state of tension and said profiles exerting rearwardly and downwardly inclined forces on the soil in the upper layer of the ground of such a character that harmful packing disadvantageous to the soil is substantially reduced and scraping off of its upper layer is generally avoided.
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