# US 9,038,618 B1 · Mechanisms and methods for stabilizing archery bows > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,618 B1 - Document ID: US9038618B1 - Status: Granted - Kind: B1 - Application number: 14/252,269 - Filed: 2014-04-14 - Granted: 2015-05-26 - Earliest claimed: 2014-02-06 - Applicants: Scott Bomar - Inventors: Scott Bomar - Web page: https://patentgrep.com/patent/US9038618B1 ## CPC - F41B 5/1426: {Bow stabilisers or vibration dampers} - 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 An archery stabilizer which, by utilizing a carbon fiber tube or a comparable material in a tube configuration, provides for preloading the tube in compression, thereby effectively increasing the stiffness of the tube. The stabilizer includes weights, and the preloading of the tube compensates for the bending moment applied to the tube by the weights attached to the end of the tube or contained within the tube. In effect, the present invention presents an apparatus and method for loading the tube so as to allow a user to adjust the elastic modulus of the tube. ## Claims ### Claim 1 A bow stabilizer comprising: a carbon fiber tube comprising a free end and a bow attachment end; a first end member disposed at the bow attachment end of the carbon fiber tube; a second end member disposed at the free end of the carbon fiber tube; an axial load member linearly spanning between the first end member and the second end member; and an adjustment mechanism which is integral to either the first end member or the second end member, wherein the adjustment mechanism changes an amount of tension in the axial load member, wherein an increase in the amount of tension applies an increase of compressive load applied to the carbon fiber tube and a decrease in the amount of tension applies a decrease of compressive load applied to the carbon fiber tube, said adjustment mechanism allowing a user to adjust the elastic modulus of the carbon fiber tube. ### Claim 2 (depends on 1) The bow stabilizer of claim 1 further comprising a weight attached to the free end of the carbon fiber tube. ### Claim 3 (depends on 1) The bow stabilizer of claim 1 wherein the second end member attaches to the free end of the carbon fiber tube. ### Claim 4 (depends on 1) The bow stabilizer of claim 1 wherein the second end member is contained within a tube extension which attaches to the free end of the carbon fiber tube. ### Claim 5 (depends on 4) The bow stabilizer of claim 4 wherein a weight is contained within the tube extension. ### Claim 6 (depends on 1) The bow stabilizer of claim 1 wherein the axial load member is selected from the group consisting of string, wire, and rods. ### Claim 7 (depends on 1) The bow stabilizer of claim 1 wherein the axial load member comprises a string having a left-hand rotation. ### Claim 8 (depends on 1) The bow stabilizer of claim 1 wherein the adjustment mechanism comprises an exterior housing through which a threaded adjustment fastener is inserted, wherein the threaded adjustment fastener has a head to which the axial load member may be attached and a floating nut which is made up on the threads of the threaded adjustment fastener. ### Claim 9 A method of stabilizing an archery bow comprising the following steps: attaching a stabilizer to the archery bow, wherein the stabilizer comprises a carbon fiber tube having an attached end, a free end, a weight attachment mechanism, and an adjustable axial loading mechanism; adding weight to the weight attachment mechanism; and applying axial load to the carbon fiber tube by adjusting the adjustable axial loading mechanism to preload the tube, said adjustable axial loading mechanism allowing a user to adjust the elastic modulus of the carbon fiber tube. ### Claim 10 (depends on 9) The method of claim 9 wherein the weight attachment mechanism provides for attachment of exterior weights at the free end of the carbon fiber tube. ### Claim 11 (depends on 9) The method of claim 9 wherein the axial load is applied by an axial load member spanning between a first end member attached at the attached end of the carbon fiber tube and a second end member attached at the free end of the carbon fiber tube. ### Claim 12 (depends on 11) The method of claim 11 wherein the axial load member is selected from the group consisting of string, wire, and rods. ### Claim 13 (depends on 11) The method of claim 11 wherein the axial load member comprises a string having a left-hand rotation. ### Claim 14 (depends on 9) The method of claim 9 wherein the adjustable axial loading mechanism comprises an exterior housing through which a threaded adjustment fastener is inserted, wherein the threaded adjustment fastener has a head to an axial load member may be attached and a floating nut which is made up on the threads of the threaded adjustment fastener.