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US 2020/0019119 A1Published application
Timepiece component with a non-magnetic shaft-like portion made of ceramic
AssigneeBlancpain SA
InventorsAlain Delizee, Cedric Reymond
Life of this patent
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AssigneeBlancpain SA
InventorsAlain Delizee, Cedric Reymond
Estimating the term…
A timepiece component including a shaft-like portion including at least one pivot about a pivot axis, wherein at least the constituent material of this shaft-like portion is a ceramic or similar non-magnetic type material, the shaft-like portion includes a plurality of recesses evenly arranged or regularly distributed about the pivot axis, and has its centre of inertia on the pivot axis, and the shaft-like portion includes a collar forming its largest diameter with respect to the pivot axis, which collar includes a parting line of the shaft-like portion, which parting line is substantially perpendicular to the pivot axis, the recesses pass right through the collar, and at least one recess contains an injection point for the material.
A timepiece component comprising a shaft-like portion including at least one pivot about a pivot axis, wherein at least the constituent material of said shaft-like portion is a ceramic, and/or said shaft-like portion includes a plurality of recesses evenly arranged around said pivot axis, and has its centre of inertia on said pivot axis, wherein at least one said recess contains an injection point for said material.
A method for making a timepiece component comprising a shaft-like portion, which includes at least one pivot about a pivot axis, wherein said shaft-like portion is made by injecting a ceramic or similar type material into a mould having at least two parts and arranged to directly produce surfaces of revolution on each said pivot, and, after filling said mould, the injection material is hardened according to the process specific to said material, and then the mould is opened once the injection material has hardened, and, when said component is not limited to said shaft-like portion, and includes at least one added element, each said element is placed on said shaft-like portion on which it is immobilized.
Dependencies are inferred from the claim text.