Chair
AssigneeAprica Kassai Kabushikikaisha
InventorsKenzou Kassai, Yoshifumi Yoneda
Life of this patent
Estimating the term…
Abstract
A seat (3) in a chair (1) is suspended by two swingable links (4, 5) to be swingable with respect to a base (2) with legs (6, 7) and a seat holder (12). The distance or spacing (S2) between lower ends of the two links (4, 5) is changeable or adjustable so that the links extend in parallel to each other or the links extend at an angle to each other, thereby varying a swinging mode of the seat (3). For this purpose the lower ends of the two links (4, 5) are connected to two sliders (21, 22) which are guided and operable to move in directions toward each other or away from each other, respectively.
Claims10
A chair comprising:
- a base (12), legs (6, 7) secured to said base (12), a seat (3) supported by said base (12), two suspension links (4, 5) suspending said seat (3) from said base (12) for enabling said seat to perform a back and forth motion relative to said base;
- each of said links (4, 5) having an upper link end journalled in a rotatable manner to said base at respective first and second journal points (A, B), said first and second journal points (A, B) being spaced from each other by a first spacing (S1), and a lower link end journalled in a rotatable manner to said seat at respective third and fourth journal points (C, D) spaced from each other by a second spacing (S2), each of said two suspension links (4, 5) having a substantially "U" shaped configuration including upper bent ends forming said upper link ends attached to said base (12) in a rotatable manner to form said first and second journal points (A, B) and lower end link sections (4', 5') forming said lower link ends supporting said seat (3) and forming said third and fourth journal points (C, D), said chair further comprising an adjusting mechanism disposed under said seat (3) for adjusting said spacing (S2) between said third and fourth journal points (C, D) of said lower end link sections (4', 5') of said two links (4, 5) without any tools, for selecting different back and forth motions by operating said adjusting mechanism.
Dependencies are inferred from the claim text.