IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0608548
(2012-09-10)
|
등록번호 |
US-8944038
(2015-02-03)
|
발명자
/ 주소 |
- Bednar, Richard L.
- Gardner, Richard W.
- Shaffer, Michael J.
|
출원인 / 주소 |
- Hunter's Manufacturing Co., Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
Provided is a crossbow riser that may comprise a plurality of cells defined by walls. The walls may consist essentially of a material wherein the yield tensile strength at 0.2% strain is greater than 780 MPa, and either the specific strength is greater than 200 kN·m/kg, or the density is less than 6
Provided is a crossbow riser that may comprise a plurality of cells defined by walls. The walls may consist essentially of a material wherein the yield tensile strength at 0.2% strain is greater than 780 MPa, and either the specific strength is greater than 200 kN·m/kg, or the density is less than 6.0 g/cc. The cells may collectively define a first volume. The walls may collectively define a second volume. The ratio of the first volume to the second volume may be greater than 1.5.
대표청구항
▼
1. A crossbow riser comprising: a plurality of cells defined by walls wherein,said walls consisting essentially of a material wherein theyield tensile strength at 0.2% strain is greater than 780 MPa, and either the specific strength is greater than 200 kNm/kg, orthe density is less than 6.0 g/cc; an
1. A crossbow riser comprising: a plurality of cells defined by walls wherein,said walls consisting essentially of a material wherein theyield tensile strength at 0.2% strain is greater than 780 MPa, and either the specific strength is greater than 200 kNm/kg, orthe density is less than 6.0 g/cc; and said cells collectively define a first volume, said walls collectively define a second volume, and the ratio of said first volume to said second volume is greater than 1.5. 2. The crossbow riser of claim 1, wherein said yield tensile strength at 0.2% strain is greater than 900 MPa. 3. The crossbow riser of claim 2, wherein said ratio of said first volume to said second volume is greater than 3.0. 4. The crossbow riser of claim 3, wherein said specific strength is greater than 210 kNm/kg, or said density is less than 5.5 g/cc. 5. The crossbow riser of claim 4, wherein said yield tensile strength at 0.2% strain is greater than 1000 MPa. 6. The crossbow riser of claim 5, wherein said the ratio of said first volume to said second volume is greater than 4.5. 7. The crossbow riser of claim 6, wherein said specific strength is greater than 230 kNm/kg, or said density of less than 4.5 g/cc. 8. The crossbow riser of claim 7, wherein said yield tensile strength at 0.2% strain is greater than 1200 MPa. 9. The crossbow riser of claim 8, wherein said the ratio of said first volume to said second volume is greater than 6.0. 10. A crossbow comprising: a bowstring movable between a cocked position and an uncocked position, said cocked position defining an operational plane; anda riser comprising a planar upper surface substantially parallel to said operational plane and a planar lower surface; anda set of one or more cells defined by a set of one or more walls, each of said one or more cells being in communication with both said upper surface and said lower surface, each of said set of one or more cells and said one or more walls having a cross-sectional area defined by a sectional plane parallel to said upper surface that is substantially constant along a dimension normal to said upper surface, and wherein the ratio of the area of the set of one or more cells to the area of the set of one or more walls is greater than 2.0. 11. The crossbow of claim 10, wherein the ratio of the area of the set of one or more cells to the area of the set of one or more walls is greater than 3.0. 12. The crossbow of claim 11, wherein the ratio of the area of the set of one or more cells to the area of the set of one or more walls is greater than 4.0. 13. The crossbow of claim 12, wherein the ratio of the area of the set of one or more cells to the area of the set of one or more walls is greater than 5.0. 14. The crossbow of claim 13, wherein the ratio of the area of the set of one or more cells to the area of the set of one or more walls is greater than 6.0. 15. A crossbow comprising: a main beam;a riser comprising: (1) a connection portion that connects said riser to said main beam; (2) a first limb holder; (3) a second limb holder; and, (4) one or more through holes configured to create a bulk density of less than 4.5 g/cc for said riser; and,a bow comprising: (1) a first limb comprising a first end supported to said first limb holder and a second end; (2) a second limb comprising a first end supported to said second limb holder and a second end; and, (3) a bowstring that is: (a) operatively received by said second ends of said first and second limbs; and, (b) moveable between an uncocked position and a cocked position to propel an associated arrow away from said crossbow. 16. The crossbow of claim 15, wherein said one or more through holes are configured to create a bulk density of less than 2.3 g/cc. 17. The crossbow of claim 15, wherein said one or more through holes are configured to create a bulk density of less than 1.5 g/cc. 18. The crossbow of claim 15, wherein said one or more through holes are defined by one or more walls, said walls comprising one or more of: a carbon fiber composite material; an aluminum-based material; and a titanium-based material. 19. The crossbow of claim 15 wherein said riser comprises: a mid-section defining said connection portion;a first side that: (1) extends outwardly from a first side of said main beam; and, (2) comprises at least a first of said through holes; and,a second side that: (1) extends outwardly from a second side of said main beam;and, (2) comprises at least a second of said through holes. 20. The crossbow of claim 15 wherein said riser comprises: a mid-section defining said connection portion;a first side that: (1) extends outwardly from a first side of said main beam; and, (2) comprises at least first and second of said through holes; and,a second side that: (1) extends outwardly from a second side of said main beam; and, (2) comprises at least third and fourth of said through holes.
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