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US 12,735,299 B2Granted
Fire-resistant synthetic tension members
AssigneeOtis Elevator Company
InventorChen Qian Zhao
Life of this patent
Estimating the term…
Abstract
A load-bearing assembly according to an example of the present disclosure includes at least one tension member. The tension member has a resin, reinforcement fibers, and at least one additive that provides a fire-resistance to the tension member. A jacket material covers the at least one tension member. An alternate load-bearing assembly and a method of making a load-bearing assembly are also disclosed.
Claims19
A load-bearing assembly, comprising:
- at least one elliptical tension member, the at least one elliptical tension member comprising:
- a resin;
- reinforcement fibers encased in the resin;
- at least one additive that provides a fire-resistance to the at least one elliptical tension member, wherein the at least one additive comprises
- at least one of a phosphorous-containing and a nitrogen-containing first additive that provides fire-resistance properties to the at least one elliptical tension member, and
- at least one of metal-exchanged clays, zeolites, zinc molybdate, zinc borate complex, zinc molybdenate, and magnesium silicate complex as a second additive that provides smoke-suppressant properties to the at least one elliptical tension member, and wherein the first additive is separate from the second additive;
- a nanofiller that is separate from the reinforcement fibers, the first additive and the second additive, the nanofiller including magnesium hydroxide and aluminum trihydrate, and the nanofiller having at least one of the following functional groups:
- glycidyl, silane, hydroxyl, carboxyl, amine, isocyanate, ethylene, and amide;
- and
- a jacket material that is separate from the resin and encases the at least one elliptical tension member.
7 more elements
A load-bearing assembly, comprising:
- at least one tension member having a circular cross-section and comprising:
- a self-fire resistant resin including at least one of epoxy, polyurethane, vinyl ester, ethylene propylene diene monomer (EPDM), and melamine, the self-fire resistant resin comprising at least a first additive of at least one nitrogen-based or phosphorous-based functional group that provides fire-resistant properties;
- reinforcement fibers encased in the self-fire resistant resin;
- a nanofiller separate from the reinforcement fibers and including magnesium hydroxide and aluminum trihydrate;
- and
- a jacket material separate from the self-fire resistant resin and encasing the at least one tension member.
3 more elements
Dependencies are inferred from the claim text.