AES has been granted a patent for a water-resistant watch case for diving watches. The case includes a crystal with an annular peripheral surface that is fastened to the middle part of the case using a metal gasket. The crystal is inclined towards the inside of the case at an angle less than 90° to distribute stresses caused by water pressure during a dive. The metal gasket is one piece and is connected to both the crystal and the middle part of the case. GlobalData’s report on AES gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on AES, Dynamic grid loading was a key innovation area identified from patents. AES's grant share as of September 2023 was 50%. Grant share is based on the ratio of number of grants to total number of patents.

Water-resistant watch case with inclined crystal for diving watch

Source: United States Patent and Trademark Office (USPTO). Credit: The AES Corp

A recently granted patent (Publication Number: US11768469B2) describes a water-resistant watch case specifically designed for diving watches. The case includes at least one crystal mounted on the upper side of a middle part, with a bezel positioned above it. The crystal has an annular peripheral surface that is fastened by a metal gasket of the watch case. The annular peripheral surface of the crystal is inclined towards the inside of the watch case at an angle less than 90° relative to a central axis perpendicular to the plane of the watch case. This design helps distribute stresses between the crystal and the middle part caused by water pressure during a dive.

The metal gasket used in the watch case is a one-piece structure that includes a first portion arranged between the annular peripheral surface of the crystal and the inner annular surface of the middle part. It also includes a second portion in contact between the inner annular wall of the middle part and the outer annular wall of the crystal. The first and second portions of the metal gasket are linear and directly connected at the bottom end of the second portion and the top end of the first portion. The top end of the second portion is positioned below the bezel.

The patent also mentions that the one-piece metal gasket can be made of a metal alloy that is at least partially amorphous. The amorphous metal alloy of the gasket can be based mainly on zirconium, platinum, or palladium. The inner annular surface on the upper side of the middle part is complementary in shape to the annular peripheral surface of the crystal. The annular walls of the watch case are parallel to the central axis.

Additionally, the annular peripheral surface of the crystal can have a deposit for etching an inscription by a laser beam. The color of the deposit can be different from the color of the first portion of the fastening gasket, allowing the inscription to be viewed through the crystal from outside the watch case. Furthermore, the annular peripheral surface of the crystal can have a structuring intended to create a decoration.

Overall, this patented watch case design offers improved water resistance for diving watches by effectively distributing stresses caused by water pressure. The use of a one-piece metal gasket made of an amorphous metal alloy enhances the durability and performance of the watch case. The inclusion of features like laser-etched inscriptions and decorative structuring adds aesthetic appeal to the watch case.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.