Fall away arrow rest system
09816776 ยท 2017-11-14
Assignee
Inventors
Cpc classification
International classification
Abstract
An arrow rest device for bows and similar equipment is provided. The arrow rest can include a y-shaped launcher, a shaft and a housing with an activator. The launcher and the activator can be fixedly connected to the shaft and rotate therewith. Within the housing can be a wall with an obstruction that can be shaped and designed to interact with a ball detent or similar component located on the end of the activator. The activator can be configured to rotate inside the housing wall and can be coupled to the housing with a biasing element that urges rotation of the activator and shaft in one direction. The activator can rotate in the housing between three positions, each corresponding to an orientation of the launcher. In one position, the activator is maintained by the wall so as to allow the launcher to have an upright orientation for supporting an arrow.
Claims
1. A fall away arrow rest system for use with a bow, said arrow rest comprising: a housing adapted for attachment to said bow, said housing including a cavity having a wall with a first indentation and a notch defined at least partially within said first indentation; a rotatable shaft including a first portion operably coupled to and supported by said housing and a second portion extending from said housing; a launcher attached to said second portion of said shaft; an activator disposed for a rotation within said cavity of said housing and coupled to said first portion of said shaft, wherein said rotation of said activator results in a rotation of said shaft and said launcher, said activator being moveable between a first position, a second position, and a third position within said housing, wherein said activator is disposed at a lowered position of rest at a first deflection angle at said first position, said activator is disposed at an upright supported position at a second deflection angle at said second position, and said activator is disposed at a fully drawn position at a third deflection angle at said third position, wherein the third deflection angle is greater than the second deflection angle, and said second deflection angle is greater than said first deflection angle; wherein said activator comprises a stopping component that includes a depressible detent and a stop biasing element below said depressible detent, said stop biasing element applying an outward force to said depressible detent, wherein in said second position, said stopping component prevents said activator from rotating toward said first position by being received in said first indention and in engagement with a stop disposed on said wall adjacent to said notch; and a torsional biasing element operably connected to said housing at one end and to at least one of said shaft or said activator at a second end, said torsional biasing element disposed to apply a torque to said activator about a longitudinal axis of said shaft in a first rotational direction, wherein said torque applied to said activator increases from the first position to the third position; wherein at said second position, a shape of said stop, a shape of said depressible detent, and said torque applied by said torsional biasing element at said second position effectuate a first downward force on said depressible detent, wherein said first downward force is less than said outward force; wherein in said third position, said activator may be released for movement in said first rotational direction in one of a freely released condition or a let-down released condition, wherein in said let-down released condition, said shape of said stop, said shape of said depressible detent, said torque applied by said torsional biasing element at said second position, a force applied by a user in opposition to said torque applied by said torsional biasing element during said let-down released condition, and a first momentum of said activator traveling through a radial displacement defined by the difference between the third deflection angle and the second deflection angle effectuates a second downward force on said depressible detent upon a collision of said depressible detent and said stop, and wherein said second downward force is less than said outward force so said depressible detent retains said activator at said second position during said let-down released condition.
2. The fall away arrow rest system of claim 1 wherein in said freely released condition, said shape of said stop, said shape of said depressible detent, said torque applied by said torsional biasing element at said second position, and a second momentum of said activator freely traveling through said radial displacement effectuate a third downward force on said depressible detent upon a collision of said depressible detent and said stop, wherein said third downward force is greater than said outward force to depress said depressible detent to clear said stop thereby allowing said torsional biasing element to rotate said activator to said first position.
3. The fall away arrow rest system of claim 1 wherein said stop is a dowel pin.
4. The fall away arrow rest system of claim 1 wherein said stop is a bulge in said wall.
5. The arrow rest system of claim 1, wherein said depressible detent and said stop biasing element must depress downward a clear distance to allow said activator to move from said upright second position to said lowered first position.
6. The arrow rest system of claim 1, wherein said stop biasing element has a first restoring constant that requires a clearing downward force to depress said depressible detent a clearing distance for said depressible detent to clear said stop.
7. The arrow rest system of claim 1, wherein said stopping component comprises a ball detent.
8. The arrow rest system of claim 1, wherein said stopping component comprises a rod having a conical end.
9. The arrow rest system of claim 1 further comprising a cord mount attached to said shaft and a cord connected to said cord mount.
10. The arrow rest system of claim 1 further comprising micro-adjustment means for aligning said launcher with said bow.
11. The arrow rest system of claim 1, wherein said launcher is in an upright position when said activator is in said second position, and wherein said launcher is in a lowered position when said activator is in said first position.
12. A fall away arrow rest system for use with a bow, said arrow rest comprising: a housing adapted for attachment to said bow, said housing including a cavity having a wall with a first indentation and a notch defined at least partially within said first indentation; a rotatable shaft including a first portion operably coupled to and supported by said housing and a second portion extending from said housing; a launcher attached to said second portion of said shaft; an activator disposed for a rotation within said cavity of said housing and coupled to said first portion of said shaft, wherein said rotation of said activator results in a rotation of said shaft and said launcher, said activator being moveable between a first position, a second position, and a third position within said housing, wherein said activator is disposed at a lowered position of rest at a first deflection angle at said first position, said activator is disposed at an upright supported position at a second deflection angle at said second position, and said activator is disposed at a fully drawn position at a third deflection angle at said third position, wherein the third deflection angle is greater than the second deflection angle; wherein said activator comprises a stopping component that includes a depressible detent and a stop biasing element below said depressible detent, said stop biasing element applying an outward force to said depressible detent, wherein in said second position, said stopping component prevents said activator from rotating toward said first position by being received in said first indention and in engagement with a stop disposed on said wall adjacent to said notch; and a torsional biasing element operably connected to said housing at one end and to at least one of said shaft or said activator at a second end to apply a torque to said activator about a longitudinal axis of said shaft in a first rotational direction; wherein in said third position, said activator may be released in one of a freely released condition or a let-down released condition, wherein in said let-down released condition, a shape of said stop, a shape of said depressible detent, a torque applied by said torsional biasing element at said second position, and a first momentum of said activator traveling through a radial displacement between said third position and said second position effectuates a second downward force on said depressible detent upon a collision of said depressible detent and said stop, wherein said first momentum includes a force applied by a user in opposition to said torque during said let-down released condition, and wherein said second downward force is less than said outward force so said depressible detent retains said activator at said second position during said let-down release condition.
13. The fall away arrow rest system of claim 12 wherein during said freely released condition, said shape of said stop, said shape of said depressible detent, said torque applied by said torsional biasing element at said second position, and a second momentum of said activator freely traveling through said radial displacement between said third position and said second position effectuate a third downward force on said depressible detent upon a collision of said depressible detent and said stop, wherein said third downward force is greater than said outward force to depress said depressible detent to clear said stop thereby allowing said torsional biasing element to rotate said activator to said first position.
Description
DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
(1) In the accompanying drawing, which forms a part of the specification and is to be read in conjunction therewith in which like reference numerals are used to indicate like or similar parts in the various views:
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DETAILED DESCRIPTION OF THE INVENTION
(17) The invention will now be described with reference to the drawing figures, in which like reference numerals refer to like parts throughout. For purposes of clarity in illustrating the characteristics of the present invention, proportional relationships of the elements have not necessarily been maintained in the drawing figures.
(18) The following detailed description of the invention references specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the present invention. The present invention is defined by the appended claims and the description is, therefore, not to be taken in a limiting sense and shall not limit the scope of equivalents to which such claims are entitled.
(19) The present invention is directed generally to an improved fall away arrow rest device 10 as shown in various embodiments throughout the several figures. Arrow rest 10 of the present invention can be designed and configured to overcome several deficiencies of previously-known fall away arrow rest designs. As shown in
(20) As shown in
(21) Turning now to
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(23) Arrow rest 10 can be used by placing shaft 210 of an arrow 208 on launcher 18 and engaging the nock (not shown) of tail section 212 of arrow 208 with bow string 204 so that bow 200 fires or shoots arrow 208 in a longitudinal direction forwardly of launcher 18. Arrow rest 10, and more particularly activator 24, can be configured to move launcher 18 from the upright support position, as shown in
(24) In order to avoid arrow 208, launcher 18 can rotate downward or otherwise away from the flight path of arrow 208 (i.e., from the upright support position to the lowered position) and out of the way of a fired arrow 208. While the figures depict arrow rest 10 configured so that launcher 18 can rotate about a generally horizontal axis, it will also be appreciated that launcher 18 can rotate about an axis oriented at any desired angle relative to bow 200 or arrow rest 10. For example, arrow rest 10 can be configured so that launcher 18 can be oriented transversely and can rotate about a generally vertical axis.
(25) Housing 12, as best shown in
(26) As further shown in
(27) Rotatable shaft 16 can include a first portion 40 rotatably mounted within housing 12 and extending transversely therefrom in a cantilevered fashion to a second portion 42 where launcher 18 can be fixedly mounted as shown in
(28) Turning to
(29) According to one embodiment, the first material is a molded plastic material and the second material is an overmolded elastic polymer material, such as rubber. In such an embodiment, launcher's 18 base 44 and arms 46 can generally be formed as a unitary element of plastic and include areas 56 and 58 of overmolded rubber. Rubber portions 56 and 58 can overlie and/or be embedded in at least portions of arms 46 and base 44. An area 60 proximate notch 52 can either be formed of the first material, the second material or different third material having properties differing from the first and second materials. The softer second material, as may be located in areas 56, 58 and 60, can be provided in order to reduce or substantially eliminate the noise developed as arrow shaft 210 moves or rattles within channel 50 or notch 52. Thus, launcher 18 can be desirably quiet (due to the softer second material) yet still have adequate stiffness and rigidity (due to the harder first material). In one embodiment, as indicated in
(30) Support component 28 and activator 24 will now be described in greater detail with continuing reference to the aforementioned figures, and with particular reference to
(31) Within support component 28 and cavity 64 can be a torsional biasing element 76 (as best shown in
(32) Torsional biasing element 76 can have a restoring constant K.sub.T such as a spring force in a torsional spring. When activator 24 is rotated upward from the first or lowered position (as shown in
(33) Activator 24 can include a body 74 that can be rigidly attached to first portion 40 of shaft 16 and a stopping component 78 for regulating rotation of shaft 16. Stopping component 78 can be housed at least partially within body 74. Body 74 and stopping component 78 can also be selectively adapted to interact with cavity wall 66 as illustrated in the figures.
(34) As best shown in
(35) Stopping component 78 can be a depressible detent, such as a ball detent or pin detent, movable linearly within a bore 86 defined within the activator body 74, as shown in
(36) Stopping component 78 can also be selectively adapted for interacting with dowel pin 72, or similar bulge in cavity wall 66, such that a force must be applied to depress ball bearing 90 to enable the edge of activator body 74 to move past cavity wall 66 and/or dowel pin 72. Stop biasing element 88 can have a restoring constant K.sub.S that inhibits deflection of stop biasing element 88 and therefore ball bearing 90. In order for activator 24 to rotate past dowel pin 72, ball bearing 90 must deflect a distance x downward into bore 86, as shown in
(37) When launcher 18 is in the lowered position and activator 24 is in the first position (as shown in
(38) When activator 24 is in the second position, ball bearing 90 can be located within notch 100 and can contact dowel pin 72 (or similar bulge in wall 66), as shown in
(39) Both stop biasing element 88 and torsional biasing element 76 can be selectively adapted so that when activator 24 is statically placed in the second position, the force F.sub.S is slightly greater than the opposing translated vertical component of force F.sub.T, denoted as F.sub.Ty. This selective adaptation can be based on the relationship between the restoring constants K.sub.T and K.sub.S, the deflection angle of torsional biasing element 76, and/or placement and size of dowel pin 72 (or similar bulge in wall 66) which can influence the orientation angle of the force F.sub.T. As a result, ball bearing or conical end 90 can be prevented from depressing into bore 86 and traveling past dowel pin 72, thereby maintaining activator 24 in the second position and the launcher 18 in the upright support position. A schematic diagram of the interaction of the forces is shown in
(40) In order for activator 24 to rotate from the second position to the first position, an opposing force greater than F.sub.S of stop biasing element 88 must be applied to depress ball bearing 90 into bore 86 and allow stopping component 78 to move underneath dowel pin 72. Once the stopping component 78 moves past dowel pin 72 and away from first indentation 68, the torsional biasing element 76 urges rotation of activator 24 into the first position where launcher 18 is in the lowered position. This opposing force can be provided solely from the rotational moment or torque about the rotational axis of shaft 16 created by torsional biasing element 76 or provided in combination with another, separate force. As explained above, torque creates a linear force F.sub.T perpendicular to the contact point 102 between ball bearing 90 and dowel pin 72 which has a translated vertical component force F.sub.Ty directly opposing F.sub.S. The vertical component force F.sub.Ty can be greater than F.sub.S when the torque about shaft 16 is increased, either by increasing the deflection angle or torsional biasing element 76 and/or applying an outside rotational moment or force. When component force F.sub.Ty is greater than F.sub.S, ball bearing 90 depresses into bore 86 and stopping component 78 can move past notch 100 and dowel pin 72, thereby rotating activator 24. Activator can then rotate through cavity 64 from the second position shown in
(41) Cavity 64 can have an arcuate wall 66 with a sliding surface that the ball bearing 90 of stopping component 78 can freely slide against once stopping component 78 clears dowel pin 72 and activator 24 begins rotation towards the first position. Alternatively, wall 66 can be positioned further away so that there is a gap between stopping component 78 and wall 66 as activator 24 moves between the first position and second position. Rotation of activator 24 and shaft 16 can continue until activator body 74 reaches a rotation limiting wall 92 of cavity 66. A rubber damper or stop 94 or similar object may be placed on rotation limiting wall 92 to engage the activator body 74 when it reaches the second position as shown in
(42) Cavity wall 66 can also be selectively arranged so that activator 24 can rotate beyond the second position and away from the first position into the third position. When in the third position, there is a distance d between the stopping component 78 and dowel pin 72 (or alternatively a bulge in wall 66). Activator 24 can be moved into the third position as a result of the rotational force created by the tension in cord 26 and rotation of cord mount 20 when the bow string 204 of bow 200 is drawn back (or by any other suitable means). Placement of activator 24 in the third position can increase the torque applied about the axis of rotation of shaft 16. This can be due to the increase in the deflection angle of torsional biasing element 76. As explained above, when activator 24 is in the third position, torsional biasing element 76 has a deflection angle .sub.3 which is used in calculating the torque through the formula: =K.sub.T.sub.3. Accordingly, the torque supplied by torsional biasing element 76 can be greater when activator 24 is in the third position than when in the second position. When activator 24 is released from the third position, such as when the drawn bow string 204 is released, activator 24 can rotate toward the second position with a torque equal to K.sub.T.sub.3. The increased torque increases the linear force F.sub.T at the contact point 102 when ball bearing 90 reaches dowel pin 72, thereby increasing the translated vertical component force F.sub.Ty that opposes the force F.sub.S pushing upward on ball bearing 90. When activator 24 is freely released from the third position, F.sub.Ty may be greater than F.sub.S and ball bearing 90 of stopping component 78 may depress into bore 86 as it contacts dowel pin 72, enabling activator 24 to move from the third position to the second position to the first position. Accordingly, launcher 18 moves from the upright drawn position to the upright support position to the lowered position. A schematic of these interactions is shown in
(43) Cavity 64 may also have a second indentation 70 with a ramp 96 formed into cavity wall 66. Such a design can entirely prevent or at least substantially eliminate any undesirable bounce back of activator body 74 and launcher 18 once activator 24 reaches the first position and launcher 18 has reached its lowered position. Once activator 24 nears the first position, second indentation 70 can allow ball bearing 90 of stopping component 78 to return to an extended position. As such, ball bearing 90 can engage ramp 96 as activator 24 approaches its first position. Once activator 24 reaches the first position, ball bearing 90 can continue engagement with ramp 96 to prevent activator body 74 (and thus launcher 18) from bouncing back towards its second position. In one embodiment, the linear force F.sub.S created by stop biasing element 88 of stopping component 78 against angled ramp 96 urges activator 24 towards its first or lowered position. This in turn can counteract any bounce back that activator body 74 would otherwise undergo and can keep activator 24 (and thus launcher 18) in its lowered position. Once activator 24 is in the first position and launcher 18 is in the lowered position, as depicted in
(44) Second indentation 70 can be of any suitable size and depth and ramp 96 can be disposed at any suitable angle in order to prevent bounce back as activator body 74 contacts rotation limiting wall 92 and/or rubber damper 94. As will be appreciated, second indentation 70 need not extend clear to the rotation limiting wall 92 and only needs to be sized to accommodate the width of ball bearing 90. In another embodiment, second indentation 70 does not include a ramp 96 but rather has a steeper surface that creates a notch holding stopping component 78 in place.
(45) Two possible methods of using the arrow rest 10 in connection with a bow 200 will now be described with reference to the aforementioned figures. However, it is understood these described methods are considered exemplary only and the use of alternative methods is considered within the scope of the present invention. In the first described method of use, a user first grasps launcher 18 and rotates it upwardly from the lowered position (shown in
(46) In the second described method of use, arrow 208 is first loaded onto launcher 18 in the lowered position. Tail section 212 of arrow 208 is also engaged with bow string 204 to prepare for firing. Drawing bow string 204 back causes cord 26, which is clipped to bow string 204 or to bow cable 206, to pull on cord mount 20, which is fixedly attached to the terminal end of second portion 42 of shaft 16. As shown in
(47) When the user releases bow string 204 to fire the arrow 208, activator 24 moves from the third position to the second position. As explained above, the torque (equal to K.sub.T.sub.3) about the rotational axis of shaft 16 creates a force F.sub.T at ball bearing 90 as it contacts dowel pin 72 greater than the opposing force F.sub.S supplied by stopping component 78. Therefore, when stopping component 78 reaches notch 100 and contacts dowel pin 72 (or alternatively a bulge in wall 66), ball bearing 90 can depress a distance x into bore 86 and move out of notch 100 and past dowel pin 72. The torsional biasing element 76 can then urge continued rotation of activator 24 to the first position. Ball bearing 90 or stopping component 78 can remain in a partially depressed position until it reaches ramp 96 of the second indentation 70 of cavity wall 64 where it can begin to release to an extended position. Activator 24 can then cease to rotate once it reaches the first position and activator body 74 contacts rubber damper 94 and/or rotation limiting wall 92. The rotation of activator 24 corresponds to a rotation in shaft 16, which corresponds to a rotation in launcher 18. As a result, launcher 18 rotates from the upright drawn position to the upright support position to the lowered position before arrow 208 completely passes through arrow rest 10. This allows arrow 208 to pass through arrow rest 10 without arrow tail section 212 or fletching 214 contacting arrow rest 10. In other words, launcher 18 rotates out of the flight path of arrow 208 so that tail section 212 or fletching 214 of arrow 208 does not contact launcher 18 as arrow 208 travels past launcher 18.
(48) The operation of the components of arrow rest 10 according to one embodiment of the invention will now be described in more detail with reference to
(49) When activator 24 is placed into the third position, the torque about the rotational axis of shaft 16 can now be described as =K.sub.T.sub.3. When freely released from the third position, activator 24 rotates toward the second position and ball bearing 90 contacts dowel pin 72. At this contact point 102, the downward force F.sub.T applied to ball bearing 90 can be described as F.sub.T=/[rsin()], where =K.sub.T.sub.3. However, the upward force applied by stop biasing element 88 remains the same as when activator 24 was statically placed in the second position and remains defined as F.sub.S=K.sub.Sx. In order for ball bearing 90 to depress a distance x into bore 86 allowing activator 24 to move to the first position, the vertical component force F.sub.Ty of F.sub.T must be greater than F.sub.S. Using the above defined formulas, the operation of arrow rest 10 can be achieved using the following formulas:
F.sub.Ty<F.sub.S(from second position).fwdarw.[K.sub.T.sub.2cos()]/[rsin()]<K.sub.Sx
F.sub.Ty>F.sub.S(from third position).fwdarw.[K.sub.T.sub.3cos()]/[rsin()]>K.sub.Sx
(50) The above formulas may be satisfied by selectively adapting torsional biasing element 76, stop biasing element 88, cavity wall 66, dowel pin 72, and/or activator 24 in a number of different combinations.
(51) The use of stopping component 78 and dowel pin 72 (or alternatively a bulge in wall 66) can enable the user to slowly let down bow string 204 when making a decision not to fire a drawn arrow 208. The configuration allows arrow rest 10 to remain in the upright support position, even when bow string 204 is fully let down. When bow string 204 is slowly let down, the tension in cord 26 decreases at a much slower rate than when bow 200 is fired. This decreased rate of tension reduction reduces the torque applied to shaft 16 as activator 24 moves from the third position to the second position (as opposed to when activator 24 is freely released from the third position). As a result, when bow string 204 is slowly let down, the torque T applied to the shaft 16 when ball bearing 90 contacts dowel pin 72 can be described in the following formula: K.sub.T.sub.3>>K.sub.T.sub.2. This results in the linear force F.sub.T created by torque to have a vertical component F.sub.Ty less than F.sub.S. This prevents ball bearing 90 from depressing a distance x into bore 86, thereby preventing activator 24 from passing by dowel pin 72 and into the first position. Arrow rest 10 can then continue to support arrow 208 until the user decides to redraw bow string 204 and fire arrow 208.
(52) It should be understood that arrow rest 10 can be oriented in a number of other ways, including in the mirror image of what is shown in the figures in order to accommodate left-handed users. It should also be understood that while arrow rest 10 is shown in the figures as having a shaft 16 having a generally horizontal axis in order to rotate launcher 18 between upright and lowered positions, arrow rest 10 can be configured and mounted to bow 200 in a fashion such that launcher 18 can rotate on a different axis, such as a vertical axis, in order to move launcher 18 out of the way of arrow 208.
(53) From the foregoing, it will be seen that this invention is one well adapted to attain all the ends and objects hereinabove set forth together with other advantages which are obvious and which are inherent to the structure. It will be understood that certain features and sub combinations are of utility and may be employed without reference to other features and sub combinations. This is contemplated by and is within the scope of the claims. Since many possible embodiments of the invention may be made without departing from the scope thereof, it is also to be understood that all matters herein set forth or shown in the accompanying drawings are to be interpreted as illustrative and not limiting.
(54) The constructions described above and illustrated in the drawings are presented by way of example only and are not intended to limit the concepts and principles of the present invention. Thus, there has been shown and described several embodiments of a novel invention. As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the examples illustrated herein, and it is therefore contemplated that other modifications and applications, or equivalents thereof, will occur to those skilled in the art. The terms having and including and similar terms as used in the foregoing specification are used in the sense of optional or may include and not as required. Many changes, modifications, variations and other uses and applications of the present construction will, however, become apparent to those skilled in the art after considering the specification and the accompanying drawings. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.