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US 6,202,506 B1Granted
Bicycle crank
AssigneeStorck Bicycle GmbH
InventorsMarkus Storck, Thomas Mertin
Life of this patent
Estimating the term…
Abstract
A bicycle crank with a core comprised of a durofoam substance, a fiber-reinforced plastic coating encasing the core, a bottom bracket axle fitting arrangement foamed into the core accessible through the fiber-reinforced plastic coating, and a bottom bracket axle fitting arrangement foamed into the core accessible through the fiber-reinforced plastic coating.
Claims30
A bicycle crank comprising:
- a) a core consisting of a durofoam substance;
- b) a fiber-reinforced plastic coating encasing the core;
- c) a first bottom bracket axle fitting arrangement foamed into the core and accessible through the fiber-reinforced plastic coating;
- and
- d) a second bottom bracket axle fitting arrangement foamed into the core and accessible through the fiber-reinforced plastic coating.
2 more elements
A bicycle crank manufactured according to a procedure comprising the following steps:
- i) introducing into a mold at least one fiber laminate layer soaked in non-hardened plastic providing a core with a partially open fiber-reinforced plastic coating;
- ii) inserting at least a first bottom bracket axle fitting arrangement and a second bottom bracket axle fitting arrangement in the partially open fiber-reinforced plastic coating;
- iii) foaming a durofoam into the partially open fiber-reinforced plastic coating;
- iv) sealing the partially open fiber-reinforced plastic coating with at least one further fiber laminate layer soaked in non-hardened plastic;
- and
- v) hardening the non-hardened plastic and the durofoam.
3 more elements
Dependencies are inferred from the claim text.