Self-adjustable backrest device

Abstract

The self-adjustable backrest device supplements a seat surface such that said seat surface is a previously existing one and what is covered by the object of this invention adds a backrest or improves the existing one, for which purpose it comprises a mobile plate on which the user rests, wherein said plate swivels on a horizontal shaft that passes through a first set of hubs connected to the plate, that shaft being associated with a second set of hubs connected to a support that may be the backrest itself of the chair or easy chair on which the self-adjustable backrest is going to be used, in which case it will be referred to as pre-existing backrest, or it may be a fixed backrest which forms part of the device, in which case it will be referred to as backrest of the device. The device may include fixing elements to prevent its movement, such as legs, pegs, or a flap.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part application that claims priority from and the benefit of U.S. application Ser. No. 15 / 778,316 filed on May 23, 2018, which is a 371 of International PCT / ES2016 / 07083 filed on Nov. 21, 2016, which claims priority from and the benefit of Spanish Application Nos. U201631384 filed on Nov. 21, 2016 and U201531301 filed on Nov. 23, 2015.[0002]The foregoing applications, and all documents cited therein or during their prosecution (“appln cited documents”) and all documents cited or referenced in the appln cited documents, and all documents cited or referenced herein (“herein cited documents”), and all documents cited or referenced in herein cited documents, together with any manufacturer's instructions, descriptions, product specifications, and product sheets for any products mentioned herein or in any document incorporated by reference herein, are hereby incorporated herein by reference, and may be emp...

AI Technical Summary

Benefits of technology

The patent describes a seat device that can have armrests or other elements without changing its nature. The plate can also have a curved shape, cushioning, flexibility, or rigidity to make the user more comfortable. The technical effect of this patent is to improve user comfort while maintaining the basic design of the seat device.

Problems solved by technology

None of the patents cited refer to an independent backrest, suitable to be installed in any type of chair, easy chair, armchair, or even on the floor itself that protects the lumbar area regardless of the posture adopted by the user and which lifts the buttocks relaxing the pressure thereon.

Images