US 8,037,876 B1Granted

Pulley-and-cable power cable tensioning mechanism for a compound archery bow

AssigneeExtreme Technologies, LLC

InventorCraig T. Yehle

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Abstract

A bow comprises: a riser; first and second limbs attached to the riser; first and second pulley members rotatably connected to the respective bow limbs; draw, power, and tensioning cables; and a tensioning pulley. The draw cable engages draw cable journals of the pulley members and rotates them as the bow is drawn and the draw cable is let out from the draw cable journals. The tensioning cable is secured at its first end to the first bow limb and engaged at its second end to be taken up by a power cam of the first pulley member as the bow is drawn and the first pulley member rotates. The tensioning pulley includes a tensioning cable journal and is arranged with the tensioning cable engaged therewith. The power cable is connected at its first end to the tensioning pulley and at its second end to the second bow limb.

Claims19

Dependent claims

A compound archery bow comprising:

a substantially rigid riser having first and second end portions;
a first resilient bow limb attached to the first end portion of the riser, which first bow limb has a corresponding pulley connection point;
a second resilient bow limb attached to the second end portion of the riser, which second bow limb has a corresponding pulley connection point;
a first pulley member rotatably connected to the first bow limb at the corresponding pulley connection point, which first pulley member includes a draw cable journal and a first power cam;
a second pulley member rotatably connected to the second bow limb at the corresponding pulley connection point, which second pulley member includes a draw cable journal;
a draw cable engaged with the respective draw cable journals of the first and second pulley members and arranged to rotate the first and second pulley members as the bow is drawn and the draw cable is let out from the draw cable journals;
a first tensioning cable secured at a first end thereof to the first bow limb and engaged at a second end thereof to be taken up by the first power cam as the bow is drawn and the first pulley member rotates;
a first tensioning pulley, which tensioning pulley includes a corresponding tensioning cable journal and is arranged with the first tensioning cable engaged with the corresponding tensioning cable journal;
and
a first power cable connected at a first end thereof to the first tensioning pulley and connected at a second end thereof to the second bow limb.

7 more elements

A method for assembling a compound archery bow, the method comprising:

rotatably connecting a first pulley member to a first bow limb at a corresponding pulley connection point thereof, which first pulley member includes a draw cable journal and a first power cam, wherein the first bow limb is attached to a first end portion of a substantially rigid riser;
rotatably connecting a second pulley member to a second bow limb at a corresponding pulley connection point thereof, which second pulley member includes a draw cable journal, wherein the second bow limb is attached to a second end portion of the riser;
engaging a draw cable with the respective draw cable journals of the first and second pulley members and arranging the draw cable to rotate the first and second pulley members as the bow is drawn and the draw cable is let out from the draw cable journals;
securing a first tensioning cable at a first end thereof to the first bow limb and engaging the first tensioning cable at a second end thereof to be taken up by the first power cam as the bow is drawn and the first pulley member rotates;
connecting a first power cable at a first end thereof to a first tensioning pulley and connecting the first power cable at a second end thereof to the second bow limb;
and
engaging the first tensioning cable with a corresponding tensioning cable journal of the first tensioning pulley.

4 more elements

Dependencies are inferred from the claim text.