LIMB MOUNTING SYSTEM FOR ARCHERY BOW
An archery bow includes a bow riser, a limb, a limb bolt and a pivot pin. The bow riser is formed at one end with a rearward portion that includes a cradle and a bridge spanning the cradle to form a passageway therebetween and a tunnel defined in an inner wall of the bridge. The limb bolt attaches a butt end of the limb to a forward portion of the bow riser. The pivot pin passes through the passageway in the rearward portion of the bow riser and positioned in the cradle of the rearward portion of the bow riser. Moreover, the pivot pin defines in a top a pair of recesses in which two limb members of the limb are nested respectively, and is formed on a bottom a pair of positioning studs together clasping opposite ends of the cradle of the rearward portion of the bow riser.
1. Field of the Invention
This invention relates to archery bows. More particularly, this invention relates to an apparatus for mounting a bow limb to a bow riser.
2. Description of the Related Art
Nowadays there exist a various of ways for mounting the upper and lower bow limbs to the ends of a bow riser of a compound archery bow. Most commonly, the butt of each bow limb is positioned in a rectilinear limb pocket aligned contiguous with the outer planar surface of the bow riser. The limb butt is then affixed to the riser by a limb bolt inserted through a hole in the limb butt, through a corresponding hole in the limb pocket and then threaded in a threaded hole in the forward most end of the outer planar surface of the riser. Besides, one may further employ a vibration damping cup or pad in the limb pocket, as disclosed in the U.S. Pat. No. 7,308,890, to reduce undue noise which could be caused by the recoil vibration occurring as the arrow is released from the bow.
Different from the bow using the limb pocket, another type of an archery bow 900 is illustrated in
As described above, it is clear that no matter it is the limb pocket or the second type of the limb mounting system, a lot of components are needed simply for mounting the limb on the riser, which would have to be specially manufactured thereby increasing the cost of the archery bow even further.
SUMMARY OF THE INVENTIONAccordingly, it is an object of the present invention to provide an improved archery bow, in which the limb mounting system can generate relatively less vibration and noise during drawing of the bow and be produced at relatively less cost.
The foregoing and other objects and advantages are attained, according to the present invention, by an archery bow comprising a bow riser, a limb, a limb bolt and a pivot pin. The bow riser is formed at one end with a forward portion and a rearward portion. The rearward portion includes a cradle and a substantially arched-shaped bridge spanning the cradle to form a passageway therebetween and a tunnel defined in an inner wall of the bridge and adjacent to the passageway. The limb has a pair of limb members generally parallel to each other. The limb bolt attaches a butt end of the limb to the forward portion of the bow riser.
In particular, the pivot pin extends through the passageway in the rearward portion of the bow riser and is positioned in the cradle of the rearward portion of the bow riser. Moreover, the pivot pin defines in an upper surface thereof a pair of recesses in which the two limb members of the limb are nested respectively, and is formed on a lower surface thereof a pair of positioning studs together clasping opposite ends of the cradle of the rearward portion of the bow riser. The positioning studs of the pivot pin are configured in shape and size to be able to pass through the tunnel in the inner wall of the bridge during assembly.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring now in detail to the drawing, there is shown an archery bow indicated generally at 100. As shown in
As best seen in
Referring to
Referring again to
More specifically, the pivot pin 5 defines in its upper surface a pair of recesses 51 in which the two limb members 21, 22 of the limb 2 are nested and confined respectively. The pivot pin 5 is further formed on its lower surface a pair of positioning studs 52 together clasping opposite ends of the cradle 121 of the rearward portion 12 of the bow riser 1 and thereby is tightly attached onto the riser 1. Preferably, the pivot pin 1 is made of plastic, such as nylon and therefore further serves as a damping member to reduce undue noise caused by the recoil vibration as the arrow is released from the bow. When compared with the prior art bow, this configuration is beneficial in that no extra damping cup or pad will be needed.
It is noted that the positioning studs 52 of the pivot pin 5 are configured in shape and size to be able to pass through the tunnel 123 in the inner wall of the bridge 122. Specifically, as shown in
Referring now to
It is to be understood that the disclosed embodiments are illustrative in nature and the invention is not to be limited to any one or more embodiments except as set forth in the following claims.
Claims
1. An archery bow comprising:
- a bow riser formed at one end with a forward portion and a rearward portion; the rearward portion including a cradle and a substantially arched-shaped bridge spanning the cradle to form a passageway therebetween and a tunnel defined in an inner wall of the bridge and adjacent to the passageway;
- a limb having a pair of limb members generally parallel to each other;
- a limb bolt attaching a butt end of the limb to the forward portion of the bow riser; and
- a pivot pin passing through the passageway in the rearward portion of the bow riser and positioned in the cradle of the rearward portion of the bow riser; the pivot pin defining in an upper surface thereof a pair of recesses in which the two limb members of the limb are nested respectively, and being formed on a lower surface thereof a pair of positioning studs together clasping opposite ends of the cradle of the rearward portion of the bow riser; and the positioning studs of the pivot pin being configured in shape and size to be able to pass through the tunnel in the inner wall of the bridge during assembly.
2. An archery bow as recited in claim 1, wherein the pivot pin is made of plastic.
3. An archery bow as recited in claim 2, wherein the pivot pin is made of nylon.
4. An archery bow as recited in claim 1, wherein the limb is integrally formed in once piece with the two limb members of the limb connected at the butt end thereof.
5. An archery bow as recited in claim 1, further comprising a limb cap positioned between the limb bolt and the butt end of the limb.
6. An archery bow as recited in claim 5, wherein the two limb members of the limb are made of glass fiber.
7. A limb mounting system for mounting a limb to a bow riser, wherein the limb has a pair of limb members; the bow riser is formed at one end with a rearward portion; the rearward portion including a cradle and a substantially arch-shaped bridge spanning the cradle to form a passageway therebetween and a tunnel defined in an inner wall of the bridge and adjacent to the passageway; the limb mounting system comprising:
- a pivot pin passing through the passageway in the rearward portion of the riser and positioned in the cradle of the rearward portion of the riser; the pivot pin defining in an upper surface thereof a pair of recesses in which the two limb members of the limb are nested respectively, and being formed on a lower surface thereof a pair of positioning studs together clasping opposite ends of the cradle of the rearward portion of the riser; and the positioning studs of the pivot pin being configured in shape and size to be able to pass through the tunnel in the inner wall of the bridge during assembly.
8. A limb mounting system as recited in claim 7, wherein the pivot pin is made of plastic.
9. A limb mounting system as recited in claim 7, further comprising a limb bolt attaching a butt end of the limb to the riser.
10. A limb mounting system as recited in claim 9, further comprising a limb cap positioned between the limb bolt and the butt end of the limb.
Type: Application
Filed: Feb 7, 2014
Publication Date: Aug 13, 2015
Inventor: Eldwin Chang (Taichung City)
Application Number: 14/174,848