Narrow crossbow with large power stroke
DCFirst 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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Abstract
One or more techniques and/or systems are disclosed for a crossbow may include a main beam; a compound bow assembly mounted to the main beam; and, a trigger mechanism mounted to the main beam for use in holding a bowstring in a cocked position. The crossbow may include wheels at opposite ends of the bow that operatively receive the bowstring. The wheels may be separated by a wheel distance (WD) when the crossbow is in an un-cocked position. The crossbow may also have a power stroke distance (PD) and the ratio WD/PD may be less than 2.0.
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Citations
30 Claims
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1. A crossbow comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A crossbow comprising:
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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, the wheel distance WD being 24 inches or less; 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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification