The tracks of the present invention utilize cut pieces of reinforcement which are associated with each individual drive lug. By using individual pieces the lugs can be easily built up with multiple layers of rubber and reinforcement. The cut pieces can be strategically shaped and placed to optimize their effect to realize improved performance and durability of the track. Incorporation of such inner fabric reinforcement layers adds stiffness to the lugs and thereby increases the torque capacity of the track. Additional layers also provide increased damage resistance after the outer layers of fabric are worn away, and added layers improve wear resistance on the sides of the lugs due to undercarriage misalignment and track-to-wheel contact when the vehicle turns during normal operations.
1. An endless vehicle track which may be used on a vehicle, said endless vehicle track comprising a body formed of an elastomeric material having an outer surface displaying a series of ground engaging profiles longitudinally spaced along said surface and an inner surface displaying a series of longitudinally spaced guide-drive lugs for retaining said track on said vehicle and/or driving said vehicle, said guide-drive lugs having a base and an outer surface on an upper face thereof, said guide-drive lugs having a given width and height, said guide-drive lugs having embedded therein at least a first inner fabric reinforcement layer extending into the guide-drive lugs to a distance inward from the outer surface, wherein the inner fabric reinforcement layer begins at a first point within a respective guide-drive lug of the series of guide-drive lugs and ends at a second point within the respective guide-drive lug of the series of guide-drive lugs.
2. The endless vehicle track of claim 1 wherein the inner fabric reinforcement layer does not extend continuously and longitudinally between different lugs on the track.
3. The endless vehicle track of claim 1 wherein the inner fabric reinforcement layer has a transverse width that is narrower than or equal to the width of the guide-drive lugs.
4. The endless vehicle track of claim 1 wherein the inner fabric reinforcement layer extends into the lugs from essentially the base of the lugs.
5. The endless vehicle track of claim 1 wherein the inner fabric reinforcement layer extends into the lugs from the first point that is at least 0.125 inch from the base of the lugs.
6. The endless vehicle track of claim 5 wherein the inner fabric reinforcement layer is embedded within the lugs at a minimum distance of 0.125 inch from the outer surface of the upper face of the guide-drive lugs.
7. The endless vehicle track of claim 1 wherein the inner fabric reinforcement layer extends into the lugs from the first point that is at least 0.25 inch from the base of the lugs, and wherein the inner fabric reinforcement layer is embedded within the lugs at a minimum distance of 0.25 inch from the outer surface of the upper face of the guide-drive lugs.
8. The endless vehicle track of claim 1 which is further comprised of an outer fabric reinforcement layer that extends over the lugs at or near the surface of at least one drive face of said lugs.
9. The endless vehicle track of claim 8 wherein the outer fabric reinforcement layer extends over the lugs at or near the surface of at least one drive face of said lugs and further extends over the lugs at or near the surface of at least a portion of the upper face of said lugs.
10. The endless vehicle track of claim 8 wherein the drive lugs have a reverse face, and wherein the outer fabric reinforcement layer extends over the lugs at or near the surface of the guide-drive lugs and further extends at or near the surface of at least a portion of the drive face and the reverse face of the guide-drive lugs.
11. The endless vehicle track of claim 8 wherein the outer fabric reinforcement layer extends at or near substantially the entire surface of the lugs.
12. The endless vehicle track of claim 8 wherein the outer fabric reinforcement layer longitudinally extends continuously from lug to lug.
13. The endless vehicle track of claim 1 which is further comprised of a second inner fabric reinforcement layer which is embedded in the guide-drive lugs.
14. The endless vehicle track of claim 13 wherein the second inner fabric reinforcement layer is embedded at least 0.125 inch deeper into the guide-drive lugs from the upper face of the guide-drive lugs than the first inner fabric reinforcement layer.
15. The endless vehicle track of claim 13 wherein the second inner fabric reinforcement layer is embedded at least 0.25 inch deeper into the guide-drive lugs from the upper face of the guide-drive lugs than the first inner fabric reinforcement layer.
16. The endless vehicle track of claim 1 which is further comprised of an outer fabric reinforcement layer that extends over the lugs at the surface of at least one drive face of said lugs.
17. The endless vehicle track of claim 16 wherein the outer fabric reinforcement layer extends over the lugs at the surface of at least one drive face of said lugs and further extends over the lugs at or near the surface of at least a portion of the upper face of said lugs.
18. The endless vehicle track of claim 16 wherein the guide-drive lugs have a reverse face, and wherein the outer fabric reinforcement layer extends over the lugs at or near the surface of the guide-drive lugs and further extends at the surface of at least a portion of the drive face and the reverse face of the guide-drive lugs.
19. The endless vehicle track of claim 16 wherein the outer fabric reinforcement layer extends over substantially the entire surface of the lugs.