Tensioner with first and second damping members and increased damping

A tensioner for an endless drive member on an engine, comprising:

• a shaft and base unit that is mountable to be stationary relative to the engine;
• a tensioner arm that is pivotable relative to the shaft and base unit about a tensioner arm axis;
• an endless drive member engagement member on the tensioner arm and engageable with the endless drive member;
• a tensioner spring that urges the tensioner arm in a free arm direction;
• a first damping member that is fixed relative to the shaft and base unit, and which receives a first radial force from a first segment of the tensioner spring that causes a first amount of frictional force between the first damping member and a surface that moves with the tensioner arm;
• and
• a second damping member that is fixed relative to the tensioner arm, and which receives a second radial force from a second segment of the tensioner spring that is spaced axially from the first segment of the tensioner spring, that causes a second amount of frictional force between the second damping member and a surface that is stationary with the shaft and base unit,
• the surface that moves with the tensioner arm is on the second damping member, and
• wherein the surface that is stationary with the shaft and base unit is on the shaft and base unit,
• wherein the second damping member receives a third radial force from the first segment of the tensioner spring that causes a third amount of frictional force between the second damping member and the surface that is stationary with the shaft and base unit, such that a total frictional force between the second damping member and the surface that is stationary with the shaft and base unit is contributed to by the second and third radial forces.

A device that is engageable with an endless drive member on an engine, comprising:

• a first main device member that is mountable to a first point relative to the engine;
• a second main device member that is pivotable relative to the first main device member about an axis;
• an endless drive member engagement member on the second main device member and engageable with the endless drive member;
• a spring that is positioned to apply a spring force between the first and second main device members;
• a first damping member that is fixed relative to the first main device member, and which receives a first radial force from a first segment of the spring that causes a first amount of frictional force between the first damping member and a surface that moves with the second main device member;
• and
• a second damping member that is fixed relative to the second main device member, and which receives a second radial force from a second segment of the spring that is spaced axially from the first segment of the spring, that causes a second amount of frictional force between the second damping member and a surface that moves with the first main device member,
• wherein the surface that moves with the second main device member is on the second main device member, and
• wherein the surface that moves with the first main device member is on the first damping member,
• wherein the first damping member receives a third radial force from the second segment of the spring that causes a third amount of frictional force between the first damping member and the second main device member, such that a total frictional force between the first damping member and the second main device member is contributed to by the first and third radial forces.

A device that is engageable with an endless drive member on an engine, comprising:

• a first main device member that is mountable to a first point relative to the engine;
• a second main device member that is pivotable relative to the first main device member about an axis;
• an endless drive member engagement member on the second main device member and engageable with the endless drive member;
• a spring that is positioned to apply a spring force between the first and second main device members;
• a first damping member that is fixed relative to the first main device member, and which receives a first radial force from a first segment of the spring that causes a first amount of frictional force between the first damping member and a surface that moves with the second main device member;
• and
• a second damping member that is fixed relative to the second main device member, and which receives a second radial force from a second segment of the spring that is spaced axially from the first segment of the spring, that causes a second amount of frictional force between the second damping member and a surface that moves with the first main device member,
• wherein the surface that moves with the second main device member is on the second damping member, and
• wherein the surface that moves with the first main device member is on the first device member,
• wherein the second damping member receives a third radial force from the first segment of the spring that causes a third amount of frictional force between the second damping member and the first main device member, such that a total frictional force between the second damping member and the first main device member is contributed to by the second and third radial forces.