TW202229807A - Crossbow - Google Patents

Abstract

A crossbow includes a riser. The crossbow includes a first limb and a second limb. The first limb includes a first end and a second end. The second limb includes a first end and a second end. The first end of the first limb and the first end of the second limb are coupled to the riser. A first wheel is rotatably coupled to the first limb proximate the second end thereof. A second wheel is rotatably coupled to the second limb proximate the second end thereof. The crossbow includes a first power cord that includes a first end coupled to the riser and a second end coupled to the first wheel. The crossbow includes a second power cord that includes a first end coupled to the riser and a second end coupled to the first wheel. The crossbow includes a bowstring. The crossbow includes an efficiency of at least 80%.

Description

crossbow

The present invention generally relates to archery. More particularly, the present invention relates to a compound bow, such as a crossbow.

Bows are used for target shooting and as a weapon for hunting. Compound bows include cams that are configured to increase the mechanical advantage of the lead for the bowstring. Some bow designs include cams that are configured to reduce string drawing forces near the full bow position. In some bow designs, cables are used to synchronize the rotation of the cams.

In some embodiments, a crossbow includes a vertical wall. In some embodiments, the crossbow includes a first limb and a second limb. In some embodiments, the first limb includes a first end and a second end. In some embodiments, the second limb includes a first end and a second end. In some embodiments, the first end of the first leg and the first end of the second leg are coupled to the vertical wall. In some embodiments, a first wheel is rotatably coupled to the first limb proximate its second end. In some embodiments, a second wheel is rotatably coupled to the second limb proximate its second end. In some embodiments, the crossbow includes a first power line having a first end coupled to the upright wall and a second end coupled to the first wheel. In some embodiments, the crossbow includes a second power line having a first end coupled to the upright wall and a second end coupled to the first wheel. In some embodiments, the crossbow includes a bowstring. In some embodiments, the crossbow comprises an efficiency of at least 80%.

In some embodiments, the crossbow is a reversed crossbow.

In some embodiments, the crossbow includes an energy storage system. In some embodiments, the energy storage system includes the first limb, the second limb, the first wheel, the second wheel, the first power line, the second power line, and the bowstring.

In some embodiments, the crossbow has an efficiency of one of 80% to 100%. In some embodiments, the crossbow has an efficiency of one of 80% to 90%. In some embodiments, the crossbow has an efficiency of one of 80% to 85%. In some embodiments, the crossbow has an efficiency of 83%.

In some embodiments, the crossbow has a draw length of 15 inches.

In some embodiments, the crossbow has an intermediate position 9 inches from an untriggered position.

In some embodiments, a distance between a triggered position and a non-triggered position is 15 inches.

In some embodiments, a string draw force of the crossbow is at least 240 lbf at an intermediate position 9 inches from an _uncocked position.

In some embodiments, the crossbow is configured to provide a kinetic energy of at least 170 ft-lb _f for an arrow/crossbow that weighs 403 grains.

In some embodiments, a crossbow includes an energy storage system and a vertical wall. In some embodiments, the crossbow has an efficiency of at least 80%.

In some embodiments, the energy storage system includes a first limb and a second limb. In some embodiments, the first limb includes a first end and a second end. In some embodiments, the second limb includes a first end and a second end. In some embodiments, the first end of the first leg and the first end of the second leg are coupled to the vertical wall. In some embodiments, a first wheel is rotatably coupled to the first limb proximate its second end. In some embodiments, a second wheel is rotatably coupled to the second limb proximate its second end. In some embodiments, a first power line includes a first end coupled to the vertical wall and a second end coupled to the first wheel. In some embodiments, a second power line includes a first end coupled to the vertical wall and a second end coupled to the first wheel. In some embodiments, the energy storage system includes a bowstring.

In some embodiments, the crossbow has an efficiency of one of 80% to 100%. In some embodiments, the crossbow has an efficiency of one of 80% to 90%. In some embodiments, the crossbow has an efficiency of one of 80% to 85%. In some embodiments, the crossbow has an efficiency of 83%.

In some embodiments, the crossbow is a reversed crossbow.

Cross-references to related applications This application claims the rights of US Provisional Patent Application No. 63/089,333, filed October 8, 2020, entitled "CROSSBOW," which is incorporated herein by reference in its entirety.

1 and 2 are a perspective view and a top view, respectively, of a crossbow 10 according to some embodiments. 3 and 4 are a perspective view and a top view, respectively, of an energy storage system 12 for a crossbow 10 in accordance with some embodiments.

Referring collectively to FIGS. 1-4 , in some embodiments, the energy storage system 12 is at least partially defined by a vertical wall 14 , a first limb 16 and a second limb 18 . In some embodiments, the first limb 16 extends between a first end 20 and a second end 22 . In some embodiments, the second limb 18 extends between a first end 24 and a second end 26 . In some embodiments, the first end 20 and the first end 24 of the first limb 16 and the second limb 18, respectively, are coupled to or fixed to the upright wall 14.

In some embodiments, the energy storage system 12 includes a first wheel 28 and a second wheel 30 . In some embodiments, the first wheel 28 is rotatably coupled to the first limb 16 proximate the second end 22 thereof. In some embodiments, the second wheel 30 is rotatably coupled to the second limb 18 proximate the second end 26 thereof. In some embodiments, the energy storage system 12 includes a first power line 32 extending between the upright wall 14 and the first wheel 28 and coupled or secured to the upright wall 14 and the first wheel 28 . In some embodiments, the energy storage system 12 includes a second power line 34 extending between the upright wall 14 and the second wheel 30 and coupled or secured to the upright wall 14 and the second wheel 30 . In some embodiments, the energy storage system 12 includes a bowstring 36 extending between the first wheel 28 and the second wheel 30 and coupled or secured to the first wheel 28 and the second wheel 30 .

In some embodiments, the first wheel 28 and the second wheel 30 are drawn or displaced toward each other when the bowstring is pulled or drawn from the untrimmed position. In some embodiments of the crossbow 10, the axis-to-axle distance ATA between a central axis 50 of the first wheel 28 and a central axis 52 of the second wheel is 14.5 inches when the bowstring is not drawn. In some embodiments, the shaft-to-shaft distance ATA between the central axis 50 of the first wheel 28 and the central axis 52 of the second wheel is 10 inches when the bowstring is not pulled. It should be understood that these values are examples and that actual values may range beyond the 14.5 or 10 inches stated. For example, in some embodiments, the shaft-to-axis distance ATA may be less than 10 inches. In some embodiments, the axis-to-axis distance ATA may be greater than 14.5 inches. In some embodiments, the shaft-to-axis distance ATA may be from 10 inches to 14.5 inches.

Various parameters, such as the design or configuration of one or more components of the crossbow 10 and the interaction between the one or more components, can affect the kinetic energy when fired and the amount of energy stored when the bow is fully drawn. Some of these parameters and/or components include, among other things, the stiffness (or flexibility) of limbs (eg, first limb 16 and second limb 18 ), cam design and operation, cabling systems (eg, cables, bowstrings, and cams). Configurations and Interactions), reversed vs. sine.

In some embodiments, it may be advantageous for a crossbow to have a higher efficiency, as it may allow easier pulling at a given output speed. In some embodiments, as a crossbow becomes more effective, the crossbow is more suitable for transferring more of its energy to the arrow rather than losing it as noise and vibration, which is in hunting situations where stealth is very important can be harmful.

The efficiency of a crossbow, such as crossbow 10, can be defined as the kinetic energy of the arrow or crossbow when fired from the crossbow and the amount of energy stored when the bowstring is fully drawn (ie, during the drawing stroke (ie, when A ratio of the amount of energy stored when the bowstring is pulled from the unstretched position to the cocked position).

A function of the mass of the kinetic energy tethered arrow or crossbow and the speed at which it is fired (ie, the initial speed of the arrow or crossbow when fired):

Among them, KE is kinetic energy;

m is the mass of the arrow or crossbow; and

v is the initial velocity of the arrow or crossbow when fired.

之一初速度之種約403.0格令之一箭/弩箭提供約170.93

之一動能。 In some embodiments, the crossbow 10 is configured to have about 440.0 when fired

A seed of initial velocity is about 403.0 grains An arrow/crossbow provides about 170.93

one kinetic energy.

In some embodiments, the stored energy is a function of the force required to draw the bowstring and the distance the bowstring is drawn or traveled by the bowstring. Thus, the stored energy represents the area under the dynamic curve of the amount of force required to draw the bowstring versus the travel of the bowstring or the distance the bowstring is drawn.

In some embodiments, the energy stored in the crossbow 10 is the area under the draw force versus draw distance curve shown in FIG. 5 .

In the example curve shown in Figure 5, the crossbow 10 includes a compression limb having a string length of 38-5/8 inches and a cable of 13-3/4 inches. Arrow weight is 403 grains.

In some embodiments, the crossbow 10 has a draw force that is substantially proportional to the draw distance between the uncocked position and a position intermediate between the drawn and uncocked positions. The untriggered position is defined as the position in which the bowstring is at rest (or brace) after the crossbow has been fired or fired. The cocked position is defined as the position of the bowstring when the bow is fully drawn and held in place by a trigger mechanism.

In some embodiments, the neutral position of the crossbow 10 of the present invention is about 9.0 inches from the untriggered position. In some embodiments, the bowstring draw length is approximately 15.0 inches. That is, in some embodiments, the distance between the cocked and uncocked positions is about 15.0 inches.

In some embodiments, the string pulling force is about _240.1 lbf at about 9.0 inches midway. Thus, between the untrigged and neutral positions of about 9.0 inches, the proportionality factor is about 27.76 lbf per lead inch.

In some embodiments, the energy stored in the energy storage system of the crossbow measured about 205.84 ft-lb _f when the bowstring was pulled by the trigger mechanism and held full bow. In some embodiments, about 205.84 ft-lb _f of energy will be stored when the bowstring is drawn about 15 inches from the cocked position in the crossbow 10.

或83% In some embodiments, the resulting efficiency of the crossbow 10 is about

or 83%

In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 81% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 82% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 83% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 84% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 85% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 86% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 87% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 88% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 89% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 90% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 91% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 92% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 93% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 94% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 95% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 96% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 97% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 98% and less than or equal to 100%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than 99% and less than or equal to 100%.

In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 99%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 98%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 97%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 96%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 95%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 94%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 93%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 92%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 91%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 90%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 89%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 88%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 87%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 86%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 85%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 84%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of one of greater than or equal to about 80% and less than or equal to 83%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 82%. In some embodiments, the crossbow 10 is configured such that it has an efficiency of greater than or equal to about 80% and less than or equal to 81%.

In view of this, modifications and/or alternative structures or configurations providing structure and/or functionality similar to the non-limiting exemplary embodiments disclosed herein may become apparent or apparent to those of ordinary skill. Accordingly, any and all variations of the non-limiting exemplary embodiments disclosed herein are considered to be within the scope of this invention.

The terminology used herein is intended to describe the embodiments and is not intended to be limiting. The terms "a" and "the" also include the plural unless expressly indicated otherwise. When used in this specification, the terms "comprises" and/or "comprising" designate the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or Various other features, integers, steps, operations, elements and/or components.

It is to be understood that changes may be made in detail without departing from the scope of the present invention, particularly with respect to the materials of construction employed and the shape, size and arrangement of parts. This specification and the described embodiments are examples, wherein the true scope and spirit of the invention is indicated by the following claims.

While various non-limiting illustrative embodiments are disclosed herein, it should be clearly understood that there is no intention (implicitly or otherwise) to limit the invention to the illustrative embodiments shown and/or described. Variations or alternatives to the disclosed exemplary embodiments will become apparent or apparent to those of ordinary skill. For example, although reference may be made to specific feature(s), configuration(s), function(s), etc., the spirit, scope and intent of the present invention should be considered to also encompass being structured or configured to function and/or Or embodiments that provide functionality similar to the disclosed embodiments. Accordingly, any and all variations of the non-limiting exemplary embodiments disclosed herein are considered to be within the scope of this invention.

10: Crossbow 12: Energy Storage System 14: Vertical Wall 16: The first bow 18: Second bow 20: First End 22: Second End 24: First End 26: Second End 28: First round 30: Second round 32: The first power line 34: Second Power Line 36: Bowstring ATA: Axis to Axis Distance

Reference is made to the accompanying drawings which form a part hereof and illustrate embodiments in which the systems and methods described in this specification may be practiced.

1 is a perspective view of a crossbow according to some embodiments.

2 is a top view of the crossbow of FIG. 1 according to some embodiments.

3 is a perspective view of an energy storage system for the crossbow of FIG. 1, according to some embodiments.

4 is a top view of the energy storage system of FIG. 3 according to some embodiments.

5 illustrates a power curve or draw curve (draw weight/force versus draw distance) of a crossbow according to some embodiments.

The same reference numerals designate the same or similar parts throughout the drawings.

10: Crossbow

12: Energy Storage System

14: Vertical Wall

16: The first bow

18: Second bow

20: First End

22: Second End

24: First End

26: Second End

28: First round

30: Second round

32: The first power line

34: Second Power Line

36: Bowstring

Claims (20)

A crossbow comprising: a vertical wall a first limb and a second limb, Wherein the first limb includes a first end and a second end; Wherein the second limb includes a first end and a second end; wherein the first end of the first limb and the first end of the second limb are coupled to the vertical wall; a first wheel rotatably coupled to the first limb proximate its second end; a second wheel rotatably coupled to the second limb proximate its second end; and A first power line, which includes: a first end coupled to the vertical wall; a second end coupled to the first wheel; and A second power line, which includes: a first end coupled to the vertical wall; a second end coupled to the first wheel; and a bowstring wherein the crossbow includes an efficiency of at least 80%. The crossbow of claim 1, wherein the crossbow is a reversed crossbow. The crossbow of claim 1, wherein the crossbow includes an energy storage system. The crossbow of claim 3, wherein the energy storage system includes the first limb, the second limb, the first wheel, the second wheel, the first power line, the second power line, and the bowstring . The crossbow of claim 1, wherein the crossbow includes an efficiency of 80% to 100%. The crossbow of claim 1, wherein the crossbow includes an efficiency of 80% to 90%. The crossbow of claim 1, wherein the crossbow includes an efficiency of 80% to 85%. The crossbow of claim 1, wherein the crossbow includes an efficiency of 83%. The crossbow of claim 1, wherein the crossbow has a draw length of 15 inches. The crossbow of claim 1, wherein the crossbow has an intermediate position 9 inches from an untriggered position. The crossbow of claim 1, wherein a distance between a triggered position and an unstripped position is 15 inches. The crossbow of claim 1, wherein a draw force of the crossbow is at least 240 lbf at an intermediate position 9 inches from an _uncocked position. The crossbow of claim 1, wherein the crossbow is configured to provide a kinetic energy of at least 170 ft-lb _f for an arrow/crossbow that weighs 403 grains. A crossbow comprising: an energy storage system; and a vertical wall, wherein the crossbow includes an efficiency of at least 80%. The crossbow of claim 14, wherein the energy storage system comprises: a first limb and a second limb, Wherein the first limb includes a first end and a second end; Wherein the second limb includes a first end and a second end; wherein the first end of the first limb and the first end of the second limb are coupled to the vertical wall; a first wheel rotatably coupled to the first limb proximate its second end; a second wheel rotatably coupled to the second limb proximate its second end; and A first power line, which includes: a first end coupled to the vertical wall; a second end coupled to the first wheel; and A second power line, which includes: a first end coupled to the vertical wall; a second end coupled to the first wheel; and A bowstring. The crossbow of claim 14, wherein the crossbow includes an efficiency of 80% to 100%. The crossbow of claim 14, wherein the crossbow includes an efficiency of 80% to 90%. The crossbow of claim 14, wherein the crossbow includes an efficiency of 80% to 85%. The crossbow of claim 14, wherein the crossbow includes an efficiency of 83%. The crossbow of claim 14, wherein the crossbow is a reversed crossbow.

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