| 摘要 |
An undercutter attachable to utility machines has a bar with chain having teeth for cutting into rock beds, whereby the chain rotates about the bar. The bar has removable top and bottom portions, which when in place and secured, provide a channel for the chain, and when the top and bottom portions are removed, allow for replacement of worn parts without loosening or removing the chain. |
| 主权项 |
1. An undercutter comprised of an elongated bar having a chain guide channel for guiding a continuous chain, first rotatable sprocket means attached to the elongated bar, a continuous chain having attached teeth for cutting and removing material and revolving around the elongated bar and second rotatable sprocket means in the chain guide channel, drive means for moving the continuous chain, wherein said elongated bar is comprised of an elongated middle rigid bar member having two ends being a distal end and a base end and having a top face and a bottom face in between the two ends, a top rigid member attached to the top face, a bottom rigid member attached to the bottom face, wherein the top rigid member and bottom rigid member in combination with the middle rigid bar member together create the chain guide channel between the top rigid member and bottom rigid member, and wherein at least one of the top rigid member and bottom rigid member is removably attached to the middle rigid bar member, and wherein said undercutter has means for attaching the undercutter to an external device, said external device having means for positioning the undercutter in desired positions during use. |
