Mechanical guns and projectors – Spring – Bow
Reexamination Certificate
2000-04-28
2001-08-21
Ricci, John A. (Department: 3712)
Mechanical guns and projectors
Spring
Bow
Reexamination Certificate
active
06276351
ABSTRACT:
BACKGROUND
This invention relates to an archery bow which can be dissembled for storage and transport and reassembled for use. More specifically this invention relates to an archery bow which has an improved method for attaching the limbs which does not require threaded bolts, screws, etc. and yet still has the strength and rigidity necessary for safe use and accurate shooting.
Archery, as a sport, has spanned many generations and is still popular today. The use of archery equipment includes many sporting events such as target events wherein competitors attempt to place arrows in a small region of a target.
The necessity to transport archery equipment is paramount to full enjoyment of the equipment. The length of a bow often makes it difficult to carry the bow in the trunk, or seat, of a vehicle. This has caused a long felt desire for an archery bow which can be disassembled without sacrificing the safety and accuracy of the bow.
There are many examples of two-piece and three-piece archery bows which can be disassembled and reassembled. Examples of three piece archery bows are exemplified in U.S. Pat. Nos. 4,674,468; 4,574,766; 3,957,027; 3,415,240; 3,921,598; 3,814,075 and 3,502,063. These all require two limbs to be attached to a central handle. The time required to assemble these archery bows decreases the time allotted for enjoyment and any slight difference in the mounting of the two limbs may decrease the accuracy of the archery bow. It is realized in the art that an archery bow designed for disassembly is best if the archery bow is approximately symmetrical with respect to the assembly joint. Two-piece construction is preferable to three-piece construction if frequent disassembly is desired.
Two-piece archery bows are exemplified in U.S. Pat. Nos. 5,570,675; 3,738,348; 3,612,018 and 3,156,230. U.S. Pat. No. 3,156,230 is an asymmetrical archery bow which is deficient due to decreased accuracy as described previously. U.S. Pat. No. 3,738,348 comprises stepped interior ends which must be perfectly machined to obtain a suitable fit between the two sections. Any wear in the stepped interior ends would cause the fit between sections to be less rigid which would lead to inaccuracy. U.S. Pat. No.
3
,
612
,
028
comprises a hinge which is undesirable since any wear in the hinge would result in movement of the two halves relative to each other which would decrease accuracy.
The two-piece design exemplified in U.S. Pat. No. 5,570,675 has received acclaim in the art due to rigidity of the joint and the accuracy achieved even after extended use. A disadvantage of the archery bow exemplified in U.S. Pat. No. 5,570,675 is the requirement of a bolt to maintain the two halves in a fixed position. One application of an archery bow is in hunting wild animals. This is typically done in the cold weather months and it is often difficult to insert and turn the threaded bolt with cold hands. Also, the problem associated with dropping, and losing, the threaded bolt is a bother to many archers.
While the availability of archery bows which can be easily assembled and disassembled has grown there is still a desire in the art for an archery bow which can be assembled and disassembled easily and without the necessity for threaded bolts. This desire must be met with safety in mind since an archery bow which fails at the joint can be lethal to the user.
SUMMARY
It is an object of the present invention to provide a take-down archery bow which is safe and has minimal parts.
It is another object of the present invention to provide a takedown archery bow which can be easily assembled and disassembled.
These and other features are provided in a take-down archery bow which comprises a first limb and a second limb. The first limb comprises a first abutment surface, a first outer extent, with a first string connection point at the first outer extent, and a first plug. The second limb comprises a second abutment surface, a second outer extent with a second string connection point at the second outer extent, and a second plug. A keeper is provided which comprises an elongated face shaft, a first leg shaft attached to one end of the elongated face shaft and a second leg shaft attached to the elongated face shaft opposite to the first leg shaft. The first leg shaft is received by the first plug and the second leg shaft is received by the second plug to prohibit separation of the two limbs.
A preferred embodiment is provided in a take-down archery bow comprising a first limb and a second limb. The first limb comprises a first abutment surface and a first outer extent, with a first string connection point at the first outer extent, and a first bore parallel to the first abutment surface. The second limb comprises a second abutment surface and a second outer extent, with a second string connection point at said second outer extent, and a second bore parallel to the second abutment surface. A keeper is provided which comprises an elongated face shaft, a first leg shaft perpendicular to the elongated face shaft and attached to one end of said elongated face shaft, and a second leg shaft parallel to the first leg shaft attached to the elongated face shaft opposite to the first leg shaft. The first leg shaft is received by the first bore and the second leg shaft is received by the second bore to prohibit separation of the first limb and the second limb.
Yet another preferred embodiment is provided in a take-down archery bow comprising a first limb and a second limb. The first limb comprises a first abutment surface and a first outer extent with a first string connection point, a first bore parallel to the first abutment surface and a first recess. The second limb comprises a second abutment surface and a second outer extent with a second string connection point at the second outer extent, and a second bore parallel to the second abutment surface. A keeper is provided which comprises an elongated face shaft, a first leg shaft attached to one end of the elongated face shaft perpendicular to the elongated face shaft, and a second leg shaft parallel to the first leg shaft and attached to the elongated face shaft opposite to the first leg shaft. When the first leg shaft is received by the first bore and the second leg shaft is received by the second bore the first abutment surface of the first limb and the second abutment surface of the second limb can not separate. The first recess and second recess form a channel and the elongated face shaft is received within the channel.
REFERENCES:
patent: 1853294 (1932-04-01), Barnhart
patent: 2228823 (1941-01-01), Helm
patent: 2457793 (1948-12-01), Bear
patent: 2813818 (1957-11-01), Pearson
patent: 3156230 (1964-11-01), Groves
patent: 3415240 (1968-12-01), Bear
patent: 3502063 (1970-03-01), Bear
patent: 3612028 (1971-10-01), Karbo
patent: 3738348 (1973-06-01), Karbo
patent: 3814075 (1974-06-01), Hoyt
patent: 3921598 (1975-11-01), Helmick
patent: 3957027 (1976-05-01), Drake
patent: 4574766 (1986-03-01), Izuta
patent: 4674468 (1987-06-01), Izuta
patent: 5025774 (1991-06-01), Martin
patent: 5291874 (1994-03-01), Harrison
patent: 5570675 (1996-11-01), Treadway
Guy Joseph T.
Ricci John A.
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