Severe duty grapple with tubular pivot
View Patent ↗An improved severe duty grapple for attachment onto the end of a dipper stick of a backhoe has an arcuate-shaped upper jaw with an inner end and a backside. The upper jaw is pivotally attached near its inner end on its backside to the end of a dipper stick and a double action actuator or cylinder for operative pivotal movement of the upper jaw relative to the dipper stick. An arcuate-shaped lower jaw is provided with an inner end and a backside. The lower jaw is attached near its inner end on its backside to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to the lower jaw. A hollow tubular pivot is attached to the inner end of one of the jaws with open opposing ends. Two lug plates are mounted on the inner end of the other jaw each with an eyelet. The eyelets are alignable with the open ends of the tubular pivot. A pivot pin is passed through the tubular pivot and eyelets and secured thereat.
1. A severe duty grapple for attachment onto an end of a dipper stick of a backhoe, comprising:
a) an arcuate-shaped upper jaw with an inner end and a back side, the upper jaw pivotally attached near its inner end on its back side to the end of the dipper stick and a double action actuator mounted between the dipper stick and the upper jaw back side for operative pivotal movement of the upper jaw relative to the dipper stick;
b) an arcuate-shaped lower jaw with an inner end and a back side, the lower jaw attached near its inner end on its back side to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to the lower jaw;
c) a singular hollow tubular pivot attached to the inner end of one of the jaws with open opposing ends, and two lug plates mounted on the inner end of the other jaw, each plate with an eyelet, the eyelets alignable with the open ends of the tubular pivot; and
d) a pivot pin passing through the tubular pivot and eyelets.
2. The severe duty grapple of claim 1 wherein the open opposing ends are machined and further comprising a pivot bushing with an external flange in each tubular pivot opening as to not let the upper and lower jaws rub together.
3. The severe duty grapple of claim 2 , further comprising the bushing being made of manganese and bronze.
4. The severe duty grapple of claim 1 , further comprising rake tips on each jaw opposite their respective inner ends.
5. The severe duty grapple of claim 4 , further comprising a load engaging plates between the inner ends and the rake tips of each jaw.
6. The severe duty grapple of claim 1 , further comprising a closed throat between the inner ends of the upper and lower jaws.
7. The severe duty grapple of claim 1 wherein there are only two lug plates on the grapple.
8. The severe duty grapple of claim 1 wherein the linkage is a double action actuator for operative pivotal movement of the lower jaw relative to the backhoe stick.
9. A severe duty grapple for attachment onto an end of a dipper stick of a backhoe, comprising:
a) an arcuate-shaped upper jaw with an inner end and a back side, the upper jaw pivotally attached near its inner end on its back side to the end of the dipper stick and a double action actuator mounted between the dipper stick and the upper jaw back side for operative pivotal movement of the upper jaw relative to the dipper stick;
b) an arcuate-shaped lower jaw with an inner end and a back side, the lower jaw attached near its inner end on its back side to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to the lower jaw;
c) a singular hollow tubular pivot attached to the inner end of one of the jaws with open opposing machined ends, and two lug plates mounted on the inner end of the other jaw, each plate with an eyelet, the eyelets alignable with the open ends of the tubular pivot;
d) a pivot bushing with an external flange in each tubular pivot opening as to not let the upper and lower jaws rub together; and
e) a pivot pin passing through the tubular pivot and eyelets.
10. The severe duty grapple of claim 9 , further comprising the bushing being made of manganese and bronze.
11. The severe duty grapple of claim 9 , further comprising rake tips on each jaw opposite their respective inner ends.
12. The severe duty grapple of claim 11 further comprising a load engaging plates between the inner ends and the rake tips of each jaw.
13. The severe duty grapple of claim 9 , further comprising a closed throat between the inner ends of the upper and lower jaws.
14. The severe duty grapple of claim 9 wherein there are only two lug plates on the grapple.
15. The severe duty grapple of claim 9 wherein the linkage is a double action actuator for operative pivotal movement of the lower jaw relative to the backhoe stick.
16. A severe duty grapple for attachment onto an end of a dipper stick of a backhoe, comprising:
a) an arcuate-shaped upper jaw with an inner end and a back side, the upper jaw pivotally attached near its inner end on its back side to the end of the dipper stick and a double action actuator mounted between the dipper stick and the upper jaw back side for operative pivotal movement of the upper jaw relative to the dipper stick;
b) an arcuate-shaped lower jaw with an inner end and a back side, the lower jaw attached near its inner end on its back side to the dipper stick by a linkage for operative pivotal movement of the upper jaw relative to the lower jaw;
c) rake tips on each jaw opposite their respective inner ends and load engaging plates between the inner ends and the rake tips of each jaw;
d) a singular hollow tubular pivot attached to the inner end of the upper jaw with open opposing machined ends, and two lug plates mounted on the inner end of the lower jaw, each plate with an eyelet alignable with one of open ends of the upper jaw tubular pivot;
e) a pivot bushing with an external flange in each tubular pivot opening as to not let the upper and lower jaws rub together; and
f) a pivot pin passing through the tubular pivot and eyelets forming a closed throat.
17. The severe duty grapple of claim 16 , further comprising the bushing being made of brass and manganese.
18. The severe duty grapple of claim 16 , wherein the linkage is a double action actuator for operative pivotal movement of the lower jaw relative to the backhoe stick.