HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00)

Description

E05D encompasses hinge systems and suspension mechanisms that enable the pivoting, rotating, or hanging movement of doors, windows, and similar hinged panels. This classification includes traditional pin hinges, ball-bearing hinges, pivot hinges, concealed hinges, and specialized suspension devices for both horizontal and vertical applications. The subclass covers the mechanical design of hinge components, fastening methods, and structural arrangements that facilitate smooth operation and load-bearing capability in building entrances, fenestration, and interior partition systems. Related classifications such as E05B (locks and latching mechanisms) and E05C (door closers and door holders) address complementary fitting functions rather than the primary rotational support provided by hinges.

Filing statistics

CPC subclass E05D recorded 38,515 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,887 in 2013 to 2,777 in 2023 (-4%), peaking at 4,460 applications in 2018. The most active applicants in class E05 are KIEKERT (2,802 applications), HYUNDAI MOTOR COMPANY (1,609 applications) and LG ELECTRONICS (1,467 applications).

Source: EPO PATSTAT, worldwide filings