Water-resistant closing device for watch case
AssigneeThe Swatch Group Research and Development Ltd
InventorsSimon Garcin, Nassima Nasri
Life of this patent
Estimating the term…
Abstract
A water-resistant closing device for a watch case, the device including an annular gasket (1) arranged to be placed between a middle (2) and a back (3), a bezel or a crystal (4), or a bezel and a crystal, or a back and a crystal. The gasket (1) has on its middle portion a bulge (10) protruding on its outer lateral face (11), the bulge being arranged to be engaged against the middle (3) and compressed following the installation of the back or of the crystal on the middle, the bulge being delimited by an upper (12) and lower material countersink (13) on either side of the bulge (10) in the non-compressed state of the gasket (1) to facilitate its installation and its deformation.
Claims11
A water-resistant closing device for a timepiece, comprising:
- a gasket (1) having an upper face, a lower face, an inner lateral face and an outer lateral face (11), the gasket (1) being arranged to be placed between a first element (2) and a second element (3) configured to be driven on the first element (2), said gasket (1) having a material countersink (12, 13) at two opposite ends of one lateral face over a height (h′) in such a way as to delimit on a middle portion of the gasket a bulge (10) of a thickness (e′) protruding on the one lateral face of the gasket (1), the bulge (10) being arranged to be compressed following the installation of the second element (3) on the first element (2),
- wherein the material countersink (12, 13) has a surface that is inscribed in a rectangle the length of which corresponds to the height (h′), and the width of which corresponds to the thickness (e′) of the bulge and of area Ar,
- wherein an area As of the section of the material countersink (12, 13) is smaller than the area Ar of the rectangle and larger than half the area of the rectangle Ar/2, and
- wherein the height (h′) of the countersink (12, 13) is between 0.1 mm and 0.4 mm.
A water-resistant closing device for a timepiece, comprising:
- a gasket (1) having an upper face, a lower face, an inner lateral face and an outer lateral face (11), the gasket (1) being arranged to be placed between a first element (2) and a second element (3) configured to be driven on the first element (2), said gasket (1) having a material countersink (12, 13) at two opposite ends of one lateral face over a height (h′) in such a way as to delimit on a middle portion of the gasket a bulge (10) of a thickness (e′) protruding on the one lateral face of the gasket (1), the bulge (10) being arranged to be compressed following the installation of the second element (3) on the first element (2),
- wherein the material countersink (12, 13) has a surface that is inscribed in a rectangle the length of which corresponds to the height (h′), and the width of which corresponds to the thickness (e′) of the bulge and of area Ar,
- wherein an area As of the section of the material countersink (12, 13) is smaller than the area Ar of the rectangle and larger than half the area of the rectangle Ar/2, and
- wherein the thickness (e′) of the bulge (10) is between 0.05 mm and 0.25 mm.
Dependencies are inferred from the claim text.