NARROW CROSSBOW WITH LARGE POWER STROKE

摘要

A crossbow may be a horizontal crossbow having a main beam and a bow assembly mounted to the main beam. The bow assembly may include: a bowstring; a riser attached to the main beam; a first bow limb; a second bow limb; a first wheel that is supported to the first bow limb; and a second wheel that is supported to the second bow limb. In some embodiments, the bow limbs may be separated at least as wide as a user's foot. In other embodiments, the bow assembly may include a trigger oriented parallel to pivot axes about which the wheels rotate. In yet other embodiments, a ratio of the distance between the wheels and the power stroke is less than 1.8.

主权项

1. A crossbow comprising:
a main beam that has: a first end; a second end; a first side; a second side; and an axis of elongation; a bow assembly mounted to the main beam and comprising:
(a) a bowstring that is: adapted to propel an arrow; and movable between a cocked position and an uncocked position;(b) a riser attached to the first end of the main beam and comprising: a first end that extends from the first side of the main beam; and a second end that extends from the second side of the main beam;(c) a first bow limb that has: a first end supported to the first end of the riser; a second end that extends from the first end of the riser toward the second end of the main beam; a concave surface that faces the first side of the main beam when the bowstring is in the uncocked position; and a length that is less than or equal to 12 inches;(d) a second bow limb that has: a first end supported to the second end of the riser; a second end that extends from the second end of the riser toward the second end of the main beam; a concave surface that faces the second side of the main beam when the bowstring is in the uncocked position; and a length that is less than or equal to 12 inches;(e) a first wheel that is: supported to the first bow limb; and pivotal with respect to the first bow limb about a first pivot axis; and(f) a second wheel that is: supported to the second bow limb; and pivotal with respect to the second bow limb about a second pivot axis; and a trigger mechanism that: is mounted to the main beam; holds the bowstring in the cocked position; and comprises a trigger that is movable on a trigger plane to release the bowstring out of the cocked position into the uncocked position; wherein:
(1) a first line that is substantially parallel to the first pivot axis simultaneously intersects a portion of the first wheel and a portion of the first bow limb;(2) a second line that is substantially parallel to the second pivot axis simultaneously intersects a portion of the second wheel and a portion of the second bow limb;(3) the first and second wheels are adapted to operatively receive the bowstring;(4) the second end of the first bow limb remains positioned longitudinally closer to the second end of the main beam than the first end of the first bow limb: (i) when the bowstring is in the cocked position; and (ii) when the bowstring is in the uncocked position;(5) the second end of the second bow limb remains positioned longitudinally closer to the second end of the main beam than the first end of the second bow limb: (i) when the bowstring is in the cocked position; and (ii) when the bowstring is in the uncocked position;(6) the bow assembly has a draw weight greater than 87 pounds; and(7) the trigger plane is substantially parallel to the first pivot axis and the second pivot axis.