US 12,392,575 B2
Crossbow with spiral wound cam system
Nicholas Obteshka, Springfield, OR (US); and Craig Yehle, Winona, MN (US)
Assigned to Ravin Crossbows, LLC, Superior, WI (US)
Filed by Ravin Crossbows, LLC, Superior, WI (US)
Filed on Apr. 1, 2024, as Appl. No. 18/623,937.
Application 18/623,937 is a continuation of application No. 17/973,258, filed on Oct. 25, 2022, granted, now 11,946,718.
Claims priority of provisional application 63/272,030, filed on Oct. 26, 2021.
Prior Publication US 2024/0247906 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F41B 5/12 (2006.01); F41B 5/10 (2006.01)
CPC F41B 5/123 (2013.01) [F41B 5/105 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A crossbow, comprising:
a frame including a first frame side and a second frame side, the frame defining a projectile axis;
a first flexible limb coupled to the first frame side and a second flexible limb coupled to the second frame side;
a first cam coupled to the first frame side and configured to rotate about a first cam axis that is substantially parallel to the projectile axis;
a second cam coupled to the second frame side and configured to rotate about a second cam axis that is substantially parallel to the projectile axis,
a drawstring engaged with the first cam and the second cam; and
a first power cable engaged with the first cam and the first flexible limb; and
a second power cable engaged with the second cam and the second flexible limb.
 
9. A crossbow, comprising:
a frame including a frame side and defining a projectile axis;
a flexible limb coupled to the frame side;
a drawstring coupled to the flexible limb and configured to move within a first plane, wherein the projectile axis extends within the first plane;
a power cable engaged to the flexible limb;
a cam coupled to the frame side and configured to rotate about a cam axis that extends within a second plane, the second plane substantially parallel to the first plane, the cam including:
a first portion configured to engage the drawstring; and
a second portion configured to engage the power cable.
 
17. A crossbow, comprising:
a frame defining a projectile axis;
a first flexible limb and a second flexible limb coupled with the frame;
a first cam coupled with the frame and configured to rotate about a first axis positioned vertically below the projectile axis, the first cam including a first portion and a second portion;
a second cam coupled with the frame and configured to rotate about a second axis positioned vertically below the projectile axis, the second cam including a first portion and a second portion;
a drawstring engaged with the first portion of the first cam and the first portion of the second cam;
a first power cable engaged with the first flexible limb and the second portion of the first cam; and
a second power cable engaged with the second flexible limb and the second portion of the second cam.