Method of manufacturing a filament formed reinforcement member and a run flat tire support therewith
The present invention provides a unitary run flat tire (RFT) reinforcement using filament material that is formed into a relatively rigid shape. The reinforcement is insertable into a mold for an RFT support and can maintain the needed structural rigidity for such insertion. Further, the invention provides an RFT support that is molded and includes the RFT reinforcement. The invention also provides a wheel assembly including a tire, a rim, and an RFT support between the rim and the tire, where the support includes the RFT reinforcement. The RFT support can have a colored indicator formed or subsequently applied thereto to indicate one or more attributes of the support.
1. A method of mrnzfacturing a run flat tire (RFT) support, comprising:
a) placing at least one RFT reinforcement into a portion of an RFT support mold, the reinforcement being formed from one or more flaments and being unitary and having a rigidity sufficient to deform about 20% or less when dropped from about two meters high to a hard surfane when an axis of the RFT reinforcement is substantially perpendicular to gravity;
(b) injecting a moldable elastomer or elastomer-forming material into the mold;
(c) flowing the moldable material through at least a portion of the reinforcement; and
(d) allowing the moldable material to at least partially solidify to form the RFT support.
2. The method of claim 1 , wherein planing the RFT reinforcement into the portion of the mold occurs in about 15 seconds or less from the time of positioning the RFT reinforcement over the mold to the tim. of inserting the reinforcement into a cavity of the mold.
3. The method of claim 1 , wherein the RFT reinforcement has a rigidity sufficient to defonn about 10% or less when dropped from about two meters high to a hard surface when an axis of the reinforcement is substantially perpendicular to gravity.
4. The method of claim 1 , wherein the reinforcement comprises filaments formed at a first transverse angle, a second transverse angle, and a circumferential angle.
5. The RFT reinforcement of claim 1 , wherein the reinforcement comprises one or more transverse members and one or more circumferential members.
6. The RFT reinforcement of claim 5 , wherein the RFT reinforcement is cut from a tubular member having a length equal to at least one reinforcement and at least one of the circumferential members have an increased width in proximity to a place on the tubular member to be cut.
7. The RFT reinforcement of claim 5 , wherein the RFT reinforcement is cut from a tubular member having a length equal to at least one reinforcement and the tubular member has at least two circumferential members in proximity to a place an the tubular member to be cut.
8. The RPT reinforcement of claim 5 , wherein at least one of the transverse or circumferential members has an increased thickness relative to another member.
9. The RFT reinforcement of claim 1 , wherein the RFT reinforcement comprises one or more coated filaments formed into a cylindrical shape.
10. The RFT reinforcement of claim 1 , wherein the RFT reinforcement comprises tabs extending from a surface of the reinforcement.