The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Sep. 14, 2021
Npk Design B.v., Leiden, NL;
Janwillem Bouwknegt, Leiden, NL;
Joseph Elisabeth Oberdorf, Leiden, NL;
NPK DESIGN B.V., Leiden, NL;
Abstract
A piece of furniture comprises a seat, a backrest and a base. At least the seat and the base are movably coupled for reversible relative adjustment in a direction from a first configuration for sitting upright to a second configuration for sitting reclined. One or more support surfaces and a lever are operably coupled to support the seat on the base. The lever rotates about an axis transverse to the seating direction and moves being coupled with the one or more support surfaces at a first support portion defining first lever arm about the axis and a second, different, support portion defining a second, different, lever arm about the axis. The one or more support surfaces define a curved, noncircular path about the axis, such that relative displacement of the support surface and the axis in the seating direction is associated with rotation of the lever about the axis.