التفاصيل البيبلوغرافية
| العنوان: |
TREE DELIMBING METHOD AND DEVICE |
| Document Number: |
20110265912 |
| تاريخ النشر: |
November 3, 2011 |
| Appl. No: |
13/001346 |
| Application Filed: |
June 23, 2009 |
| مستخلص: |
Method and device for delimbing a tree trunk (60) in a compliant gripping state defined by a set of limbing knives (18, 24, 26, 28) enclosing the trunk. The limbing knives are repeatedly adjusted through a control unit (46) for adaption of the gripping state to a varying thickness of the trunk when the trunk is advanced between the knives for the delimbing of the trunk. The invention comprises entering a desired compliance (D1) of the gripping state in the control unit (46), detecting an actual compliance (d) of the gripping state, and performing each adjustment of the limbing knives via the control unit until the actual compliance (d) corresponds to the desired compliance (D1). |
| Inventors: |
Arvidsson, Hans (Grangarde, SE) |
| Claim: |
1. A method of delimbing a tree trunk (60) in a compliant gripping state defined by a set of limbing knives (18, 24, 26, 28) enclosing the trunk, comprising repeated adjustment of the limbing knives through a control unit (46) for adaption of the gripping state to a varying thickness of the trunk when the trunk is advanced between the knives for the delimbing of the trunk, setting a desired compliance (D1) of the gripping state in the control unit (46); detecting an actual compliance (d) of the gripping state; and performing each adjustment of the limbing knives via the control unit the actual compliance (d) corresponds to the desired compliance (D1). |
| Claim: |
2. The method according to claim 1, wherein the compliance comprises a remaining free stroke of travel of a limbing knife (28) spring-loaded against the trunk (60). |
| Claim: |
3. A device for delimbing a tree trunk (60), comprising a set of limbing knives (18, 24, 26, 28) adapted to enclose the trunk and define a compliant tree trunk gripping state, comprising actuators (20, 56) for repeated adjustment of the limbing knives through a control unit (46) for adaption of the gripping state to a varied thickness of the trunk when the trunk is advanced between the knives for the delimbing of the trunk; an input unit (47) for entering a desired compliance (D1) of the gripping state into the control unit; and a sensor (42) for detecting an actual compliance (d) of the gripping state and signaling the actual compliance to the control unit; on each repeated adjustment of the limbing knives, the control unit being adapted to control the actuators until the actual compliance (d) corresponds to the desired compliance (D1). |
| Claim: |
4. The device according to claim 3, wherein one of the limbing knives (18, 24, 26, 28) comprises a spring-loaded limbing knife (28), and wherein the compliance comprises a remaining free travel of stroke of the spring-loaded limbing knife (28). |
| Claim: |
5. The device according to claim 4, wherein the sensor is a proximity sensor adapted to detect the actual remaining free travel of stroke (d). |
| Claim: |
6. The device according to claim 3, wherein the input unit (47) comprises a set of keys (49). |
| Claim: |
7. The device according to claim 4, wherein the input unit (47) comprises a set of keys (49). |
| Claim: |
8. The device according to claim 5, wherein the input unit (47) comprises a set of keys (49). |
| Current U.S. Class: |
144/343 |
| Current International Class: |
01; 27 |
| رقم الانضمام: |
edspap.20110265912 |
| قاعدة البيانات: |
USPTO Patent Applications |