# US 10,502,516 B2 · Crossbow cam > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,516 B2 - Document ID: US10502516B2 - Status: Granted - Kind: B2 - Application number: 16/203,961 - Filed: 2018-11-29 - Published: 2019-05-30 - Granted: 2019-12-10 - Earliest claimed: 2017-11-29 - Assignees: Hunter's Manufacturing Co., Inc. - Applicants: Hunter's Manufacturing Company, Inc. - Inventors: Richard Bednar; Phil Bednar - Web page: https://patentgrep.com/patent/US10502516B2 ## CPC - F41B 5/105: {Cams or pulleys for compound bows} - F41B 5/123: {Compound crossbows} - F41B: WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR (projectiles for fishing, e.g. fish-spears, A01K81/00; sports implements for throwing A63B65/00, e.g. boomerangs A63B65/08; stationary apparatus for projecting sports balls, e.g. tennis balls, A63B69/40; throwing or slinging toys A63H33/18; knives, axes B26B; projectiles or missiles other than those incorporating springs as projecting means F42B6/00) ## Abstract Provided is a crossbow comprising a bow having: a riser having a first riser side and a second riser side; a first cam set having a first shaft, a first power cord cam of the first cam set, a bowstring cam, and a second power cord cam of the first cam set; a second cam set having a second shaft, a first power cord cam of the second cam set, a bowstring cam, and a second power cord cam of the second cam set; a first power cord engaged with the first power cord cam of the first cam set and the first riser side; a second power cord engaged with the first power cord cam of the second cam set and the second riser side; and a third power cord engaged between the second power cord cams. ## Claims ### Claim 1 A crossbow comprising a bow having a riser having a first riser side and a second riser side opposite the first riser side, a first limb set engaged to the first riser side, and defining a first limb axis; a second limb set, engaged to the second riser side, and defining a second limb axis parallel to the first limb axis; a first cam set having a first shaft defining and rotatable about a first cam axis, the first shaft engaged with the first limb set such that the first cam axis coincides with the first limb axis, a first power cord cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis, a bowstring cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis, a second power cord cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis; a second cam set having a second shaft defining and rotatable about a second cam axis, the second shaft engaged with the second limb set such that the second cam axis coincides with the second limb axis, a first power cord cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis, a bowstring cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis, a second power cord cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis; an elongated first power cord having a first end of the elongated first power cord operationally engaged with the first power cord cam of the first cam set, and a second end of the elongated first power cord opposite the first end of the elongated first power cord operationally engaged with the first riser side; an elongated second power cord having a first end of the elongated second power cord operationally engaged with the first power cord cam of the second cam set, and a second end of the elongated second power cord opposite the first end of the elongated second power cord operationally engaged with the second riser side; an elongated third power cord having a first end of the elongated third power cord operationally engaged with the second power cord cam of the first cam set, and a second end of the elongated third power cord opposite the first end of the elongated third power cord operationally engaged with the second power cord cam of the second cam set; and an elongated bowstring having a first end of the elongated bowstring operationally engaged with the bowstring cam of the first cam set, and a second end of the elongated bowstring opposite the first end of the elongated bowstring operationally engaged with the bowstring cam of the second cam set; and wherein the bow has a top side facing in a top direction, the bowstring cam of the first cam set has a top side facing in a top direction that is the same as the top direction of the bow, and the bowstring cam of the second cam set has a top side facing in a top direction that is the same as the top direction of the bow and has a bottom side opposite the top side. ### Claim 2 (depends on 1) The crossbow of claim 1, wherein the first power cord cam of the first cam set, or the bowstring cam of the first cam set, or second power cord cam of the first cam set, or some combination thereof is movable in orientation, or position or both with respect to the first shaft. ### Claim 3 (depends on 2) The crossbow of claim 2, wherein the first power cord cam of the second cam set, or the bowstring cam of the second cam set, or second power cord cam of the second cam set, or some combination thereof is movable in orientation, or position or both with respect to the second shaft. ### Claim 4 (depends on 1) The crossbow of claim 1, wherein the first power cord cam of the first cam set, the bowstring cam of the first cam set, and second power cord cam of the first cam set are fixed in orientation and position with respect to the first shaft. ### Claim 5 (depends on 4) The crossbow of claim 4, wherein the first power cord cam of the second cam set, the bowstring cam of the second cam set, and second power cord cam of the second cam set are fixed in orientation and position with respect to the second shaft. ### Claim 6 (depends on 5) The crossbow of claim 5, wherein the first power cord cam of the first cam set is adjacent to the top side of the bowstring cam of the first cam set; and the first power cord cam of the second cam set is adjacent to the bottom side of the bowstring cam of the second cam set. ### Claim 7 (depends on 5) The crossbow of claim 5, wherein the first power cord cam of the first cam set is adjacent to the top side of the bowstring cam of the first cam set; and the first power cord cam of the second cam set is adjacent to the top side of the bowstring cam of the second cam set. ### Claim 8 (depends on 7) The crossbow of claim 7, wherein the second power cord cam of the first cam set is a helical cam. ### Claim 9 (depends on 8) The crossbow of claim 8, wherein the second power cord cam of the second cam set is a helical cam. ### Claim 10 (depends on 9) The crossbow of claim 9, wherein the first power cord cam of the first cam set is a planar cam. ### Claim 11 (depends on 10) The crossbow of claim 10, wherein the first power cord cam of the second cam set is a planar cam. ### Claim 12 A method of using a crossbow comprising providing a crossbow having a bow having a riser having a first riser side and a second riser side opposite the first riser side, a first limb set engaged to the first riser side, and defining a first limb axis; a second limb set, engaged to the second riser side, and defining a second limb axis parallel to the first limb axis; a first cam set having a first shaft defining and rotatable about a first cam axis, the first shaft engaged with the first limb set such that the first cam axis coincides with the first limb axis, a first power cord cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis, a bowstring cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis, a second power cord cam of the first cam set operationally engaged with the first shaft to be rotatable about the first cam axis; a second cam set having a second shaft defining and rotatable about a second cam axis, the second shaft engaged with the second limb set such that the second cam axis coincides with the second limb axis, a first power cord cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis, a bowstring cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis, a second power cord cam of the second cam set operationally engaged with the second shaft to be rotatable about the second cam axis; an elongated first power cord having a first end of the elongated first power cord operationally engaged with the first power cord cam of the first cam set, and a second end of the elongated first power cord opposite the first end of the elongated first power cord operationally engaged with the first riser side; an elongated second power cord having a first end of the elongated second power cord operationally engaged with the first power cord cam of the second cam set, and a second end of the elongated second power cord opposite the first end of the elongated second power cord operationally engaged with the second riser side; an elongated third power cord having a first end of the elongated third power cord operationally engaged with the second power cord cam of the first cam set, and a second end of the elongated third power cord opposite the first end of the elongated third power cord operationally engaged with the second power cord cam of the second cam set; and an elongated bowstring having a first end of the elongated bowstring operationally engaged with the bowstring cam of the first cam set, and a second end of the elongated bowstring opposite the first end of the elongated bowstring operationally engaged with the bowstring cam of the second cam set; and wherein the bow has a top side facing in a top direction, the bowstring cam of the first cam set has a top side facing in a top direction that is the same as the top direction of the bow, and the bowstring cam of the second cam set has a top side facing in a top direction that is the same as the top direction of the bow and has a bottom side opposite the top side; and moving the bowstring between a cocked position and an uncocked position. ### Claim 13 (depends on 12) The method of claim 12, wherein the first power cord cam of the first cam set, or the bowstring cam of the first cam set, or second power cord cam of the first cam set, or some combination thereof is movable in orientation, or position or both with respect to the first shaft. ### Claim 14 (depends on 13) The method of claim 13, wherein the first power cord cam of the second cam set, or the bowstring cam of the second cam set, or second power cord cam of the second cam set, or some combination thereof is movable in orientation, or position or both with respect to the second shaft. ### Claim 15 (depends on 12) The method of claim 12, wherein the first power cord cam of the first cam set, the bowstring cam of the first cam set, and second power cord cam of the first cam set are fixed in orientation and position with respect to the first shaft. ### Claim 16 (depends on 15) The method of claim 15, wherein the first power cord cam of the second cam set, the bowstring cam of the second cam set, and second power cord cam of the second cam set are fixed in orientation and position with respect to the second shaft. ### Claim 17 (depends on 16) The method of claim 16, wherein the first power cord cam of the first cam set is adjacent to the top side of the bowstring cam of the first cam set; and the first power cord cam of the second cam set is adjacent to the bottom side of the bowstring cam of the second cam set. ### Claim 18 (depends on 16) The method of claim 16, wherein the first power cord cam of the first cam set is adjacent to the top side of the bowstring cam of the first cam set; and the first power cord cam of the second cam set is adjacent to the top side of the bowstring cam of the second cam set. ### Claim 19 (depends on 18) The method of claim 18, wherein the second power cord cam of the first cam set is a helical cam; the second power cord cam of the second cam set is a helical cam; the first power cord cam of the first cam set is a planar cam; and the first power cord cam of the second cam set is a planar cam.