Tensioner
A tensioner comprising a base, a shaft extending from the base, a pivot arm pivotally engaged with the shaft, a torsion spring disposed between the pivot arm the base, a base portion cooperatively engagable with a pivot arm portion upon an axial movement of the pivot arm to a first position, a removable member engaged with the shaft to retain the pivot arm in the first position, the first position limiting the pivot arm to a first range of movement, and the pivot arm axially moveable to a second position upon removal of the removable member, the second position limiting the pivot arm to a second range of movement.
1. A tensioner comprising:
a base;
a shaft extending from the base;
a pivot arm pivotally engaged with the shaft;
a torsion spring disposed between the pivot arm the base;
a base portion cooperatively engagable with a pivot arm portion upon an axial movement of the pivot arm to a first position;
a removable member engaged with the shaft to retain the pivot arm in the first position, the first position limiting the pivot arm to a first range of movement; and
the pivot arm axially moveable to a second position upon removal of the removable member, the second position limiting the pivot arm to a second range of movement.
2. The tensioner as in claim 1 , wherein the torsion spring is in partial compression in the first position.
3. The tensioner as in claim 1 , wherein the removable member comprises an arcuate portion engagable with the shaft, the arcuate portion extending through an angular extent greater than 180°.
4. The tensioner as in claim 1 , wherein the removable member is disposed between the pivot arm and a retainer fixed to the shaft.
5. The tensioner as in claim 1 , wherein:
the base portion comprises a receiving portion;
the pivot arm portion comprises a projecting portion for cooperatively engaging the receiving portion.
6. The tensioner as in claim 1 , wherein:
the pivot arm portion comprises a receiving portion;
the base portion comprises a projecting portion for cooperatively engaging the receiving portion.
7. The tensioner as in claim 1 , wherein the second range of movement is greater than the first range of movement.
8. A tensioner comprising:
a base;
a shaft extending from the base, a retainer fixed to an end of the shaft;
a pivot arm pivotally engaged with the shaft;
a torsion spring disposed between the pivot arm the base;
a base portion cooperatively engagable with a pivot arm portion upon an axial movement of the pivot arm to a first position;
a removable member engaged between the retainer and the pivot arm to retain the pivot arm in the first position, the first position limiting the pivot arm to a first range of movement;
the pivot arm axially moveable to a second position upon removal of the removable member, the second position limiting the pivot arm to a second range of movement; and
the second position determined by engagement of the pivot arm with the retainer.
9. The tensioner as in claim 8 , wherein the removable member comprises an arcuate portion engagable with the shaft, the arcuate portion extending through an angular extent greater than 180°.
10. The tensioner as in claim 8 , wherein:
the base portion comprises a receiving portion;
the pivot arm portion comprises a projecting portion for cooperatively engaging the receiving portion.
11. The tensioner as in claim 8 , wherein:
the pivot arm portion comprises a receiving portion;
the base portion comprises a projecting portion for cooperatively engaging the receiving portion.
12. The tensioner as in claim 8 , wherein the second range of movement is greater than the first range of movement.
13. A tensioner comprising:
a base;
a shaft extending from the base, a retainer fixed to an end of the shaft;
a pivot arm pivotally engaged with the shaft;
a torsion spring disposed between the pivot arm the base;
a base portion cooperatively engagable with a pivot arm portion upon an axial movement of the pivot arm to a first position;
a removable member engaged between the retainer and the pivot arm to retain the pivot arm in the first position, the first position limiting the pivot arm to a first range of movement;
the pivot arm axially moveable to a second position upon removal of the removable member, the second position limiting the pivot arm to a second range of movement that is greater than the first range of movement; and
the second position determined by engagement of the pivot arm with the retainer.
14. The tensioner as in claim 13 , wherein:
the base portion comprises a receiving portion;
the pivot arm portion comprises a projecting portion for cooperatively engaging the receiving portion.
15. The tensioner as in claim 13 , wherein:
the pivot arm portion comprises a receiving portion;
the base portion comprises a projecting portion for cooperatively engaging the receiving portion.