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Narrow crossbow with large power stroke

DC
  • US 8,763,595 B1
  • Filed: 02/27/2014
  • Issued: 07/01/2014
  • Est. Priority Date: 12/01/2006
  • Status: Active Grant
First Claim
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1. A crossbow comprising:

  • a main beam that has a proximal end, a distal end and an axis of elongation;

    a bow assembly mounted to the distal end of the main beam and comprising;

    (a) a bowstring that is movable between a cocked position and an uncocked position;

    the linear distance between the cocked position and the uncocked position along the axis of elongation of the main beam being the powerstroke distance (PD); and

    , the bowstring is adapted to propel an arrow;

    (b) a first bow limb that has;

    a first end supported to the main beam;

    a second end that extends from a first side of the main beam toward the proximal end of the main beam;

    a concave surface that faces the main beam when the bowstring is in the uncocked position; and

    , a length that is less than 14 inches;

    (c) a second bow limb that has;

    a first end supported to the main beam;

    a second end that extends from a second side of the main beam toward the proximal end of the main beam;

    a concave surface that faces the main beam when the bowstring is in the uncocked position; and

    , a length that is less than 14 inches;

    (d) a first wheel that is supported to the first bow limb and that is pivotal with respect to the first bow limb about a first pivot axis that is substantially perpendicular to a ground surface when the arrow is properly propelled, wherein 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;

    (e) a second wheel that is supported to the second bow limb and that is pivotal with respect to the second bow limb about a second pivot axis that is substantially perpendicular to the ground surface when the arrow is properly propelled, wherein 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;

    (f) wherein the first and second wheels are adapted to operatively receive the bowstring;

    (g) wherein the second end of the first bow limb remains positioned longitudinally closer to the proximal end of the main beam than the first end of the first bow limb;

    (1) when the bowstring is in the cocked position; and

    , (2) when the bowstring is in the uncocked position;

    (h) wherein the second end of the second bow limb remains positioned longitudinally closer to the proximal end of the main beam than the first end of the second bow limb;

    (1) when the bowstring is in the cocked position; and

    , (2) when the bowstring is in the uncocked position;

    (i) wherein the first pivot axis and the second pivot axis are separated by a wheel distance (WD) when the crossbow is in the uncocked position;

    (j) wherein a ratio of WD to PD (WD/PD) is less than 2.0;

    a trigger mechanism mounted to the main beam for use in holding the bowstring in the cocked position; and

    ,wherein the bow assembly has a draw weight in excess of 87 pounds.

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