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US 6,470,870 B1Granted
Synchronous compound bow with non-coplanar actuators and interchangeable leveraging components
OwnerJohn G. Schaarinventor
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OwnerJohn G. Schaarinventor
Estimating the term…
An archers bow comprising a center riser section, two primary resilient limbs, a pair of twin grooved, dual-planar compound pulleys, with the compound pulleys being employed in a multiple of possible ways with non-coplanar actuator elements for purposes of inducing mechanical advantage, with the mechanical advantage induced by the pulleys being used by the archer to aid in bending the limbs on the bow in a manner which eliminates pulley/actuator induced torsion from the system. The invention defines an actuator configuration for the pulleys consisting of one or more sections, including tensioning actuator sections and one actuator section that is suitable for use as a bowstring, and includes a method for connecting the tensioning actuators to the pulleys, and to terminating locations on a pair of resilient Pulley Return Energy Storage e.g. PRES components provided separately for that purpose, which, in an overall bow configuration, provides that aside from the bowstring section used by the archer to actuate the pulleys, no part of the actuator or actuators connected to the pulleys is ever positioned in a manner whereby the actuator or actuators would intersect the horizontal plane bisecting the riser assembly of the bow at any time. The invention further seeks to define, and provide methods for solving, a plurality of known, as well as some perhaps previously unknown, problems affecting compound bows which have not been successfully addressed previously. The inventive bow defines and incorporates combinations of interchangeable components which can be configured to produce a variety of energy storing patterns for archers of all draw lengths, while allowing use of decreased fistmele distances, which serves to lengthen acceleration stroke distances.
A shooting archer's bow comprising:
A bow as in claim #1 wherein at least one pres component consists of a flexing member.
A bow as in claim #2, wherein at least one flexing pres component is mechanically connected directly to the bow's riser component.
A bow as in claim #2, wherein at least one flexing pres component is an integral part of the riser component.
A bow as in claim #2, wherein at least one flexing pres component is mechanically connected to the primary limb member mounted at the same end of the bow's riser.
A bow as in claim #2, wherein at least one flexing pres component is an integral part of the primary limb mounted at the same end of the bow's riser.
A bow as in claim #1, wherein at least one pres component is substantially non-flexing.
A bow as in claim #7, wherein at least one substantially non-flexing pres component is mechanically connected directly to the bow's riser component.
A bow as in claim #7, wherein at least one substantially non-flexing pres component is an integral part of the riser component.
A bow as in claim #7, wherein at least one substantially non-flexing pres component is mechanically connected to the primary limb member mounted at the same end of the bow's riser.
A bow as in claim #7, wherein at least one substantially non-flexing pres component is an integral part of the primary limb member mounted at the same end of the bow's riser.
A bow, as in claim #1, which has in it's makeup at least one flexing primary limb or flexing pres component that incorporates reinforcing fibers wrapped in a radial manner around it's entire circumference in at least one directional orientation.
A bow as in claim #12, wherein at least some of the reinforcing fibers used in construction of the members are comprised of preimpregnated tapes.
A bow as in claim #12, wherein at least some of the radially wrapped fibers are originally positioned by overbraiding.
A bow, as in claim #1, wherein the riser component is a multiple piece sub-assembly comprised of a main body section which coacts with separate limb alignment components via a joining means located near each end of the main riser body section.
A bow as in claim #15, wherein the main body section of the riser subassembly is produced from a preforged material billet having sight window offset and/or arrow shelf reliefs incorporated in the preforged billet such that right-hand and left-hand riser main body sections may be produced from the same preforged billet by using the same profiling pattern or CNC machine program.
A bow as in claim #15 wherein the main body section joining means for coacting with at least one of the separate limb-alignment components is comprised of a concave-shaped relieved section located proximate an end of the main body section of the riser sub-assembly.
A bow as in claim #15 wherein at least one limb alignment component of the riser sub-assembly incorporates two upward directed flanges each having an inside surface area and outside surface area and a distance between their inside surface areas such that a bow limb's base portion fits within the distance between the inside surface areas, said upward projecting flanges being of sufficient height above the in-between flange base surface, to restrain side-to-side, clockwise rotational, or counter-clockwise rotational movement of the bow limb when the limbs are mounted on the bow in conjunction with the limb alignment component, a base surface relating to the between inside surface distance between the inside surfaces of the upward projecting flanges suitable for the base of the bow limb to rest upon, two downward projecting flanges each having an inside surface and outside surface and a distance between these inside surfaces sufficient to allow the downward projecting flanges to slip over the parallel sides of the bow riser in the area provided for mounting the limb alignment component on the riser, in a manner that provides that the downward projecting flanges extend lengthwise to a point that would cause them to engage the sides of the riser if an attempt were made to move the limb alignment component itself, from side-to-side, or in either clockwise rotational or counter-clockwise rotational directions after being mounted on the riser, with the shape of the area of the allignment component that is between the downward projecting flanges curved in a convex shape designed to fit and coact with a matching concave-shaped relieved area on the bow's riser component, said curved surface providing the capability to rotate the pitch of the limb in a manner that would allow for placing either more or less prestress in the primary limb housed by the limb alignment component when the bow is in an assembled state.
A bow as defined by claim #1, having a riser main body section which incorporates a minimum of one sight-pin slot passing through the riser from side-to-side provided for in it's sight window area, with said slot incorporating at least one recessed channel along at least part of the length of one side of the slot, with the channel to be of sufficient depth, width, and shape to fixedly engage and keep from turning either clockwise or counterclockwise the sides of sight-pin locking nuts when such lock-nuts are not round.
A bow as in claim #1, incorporating in it's makeup at least one pulley having a larger circumference round primary pulley side and a smaller circumference round secondary side and a distance between them, said pulley sides joined in a manner that causes each pulley side to remain fixed in a constant position with respect to the other, an axle hole passing completely through the pulley from side to side, the axle hole being positioned at the geometric center of the primary side of the pulley, and the axle hole being not at the geometric center of the secondary side of the pulley, with each of the pulley's side's outer circumference incorporating a concave shaped groove of sufficient depth to retain the type of flexible actuators selected for use with the pulley, with the pulley providing a means of holding in position the actuator or actuators associated with each side of the pulley so that the length of each pulley side's actuator segment remains substantially constant during operation of the bow, said pulley providing that the motion relating to the point where the free end of the actuator exiting the pulley groove in the primary side of the bow during rotation of the pulley would appear to remain substantially constant, whereas the motion relating to the point where the free end of the actuator exits the secondary side of the pulley during rotation of the pulley would appear to describe an elliptical arc, thereby allowing the leverage applied by the actuator(s) to the cable tieoff point on the bow in the case of the actuator exiting from the secondary side of the pulley, or to the bowstring in the case of the actuator exiting from the primary side of the pulley, to vary in a variety of patterns depending on the degree of eccentricity of the axle hole position with respect to the secondary side of the pulley while maintaining an axle hole position that is geometrically centered with respect to the primary side of the pulley.
A bow as in claim #1, wherein the bowstring actuator segment and the tensioning actuator segments comprise a single continuous strand of actuator material.
Dependencies are inferred from the claim text.