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US 7,246,859 B2Granted
Chair
AssigneeOkamura Corporation
InventorsRyo Igarashi, Naoki Numa, Ken Nakayama, Hiroshi Masunaga
Life of this patent
Estimating the term…
Abstract
A chair has a backrest and a pair of armrests. A pair of support struts for supporting the backrest is connected to a shaft of a base under a seat. The armrest is supported by an arm post. An operating lever is mounted on the upper front end of the arm post. When the backrest is tilted, it is held at a desired angle by pressing up the operating lever.
Claims1
An armrest device in a chair, comprising:
- an arm post extending vertically;
- an arm pad provided at a top of the arm post and having an elongate bore in a front lower surface;
- an armrest support plate extending horizontally in the arm post and having a support bore in a front part;
- a support arm extending between the lower surface of the arm pad and the armrest support plate, an axial portion at a front end of the support arm being placed in the elongate bore of the arm pad and slidable longitudinally of the arm pad, a support shaft at a rear end of the support arm being put in the support bore of the armrest support plate and being horizontally pivotal;
- and
- a vertical shaft mounted to a rear part of the armrest support plate at a lower end supporting the arm pad at an upper end, enabling the arm pad to pivot horizontally.
3 more elements
Dependencies are inferred from the claim text.