EP0646342A2
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Chair
Assignee: Aprica Kassai KK
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Filing: 1994-10-03
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Granted: —
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Expires: 2014-10-03
Abstract
Abstract In a chair comprising a seat portion (3) which is suspended through two swingable links (4, 5) to be swingable with respect to a base portion (2) comprising a leg portion (6, 7) and a seat holder (12), the distance between lower ends of the two links (4, 5) is rendered changeable so that the parallelism between the two links (4, 5) can be changed thereby varying a swinging mode of the seat portion (3). Thus, lower ends of the two links (4, 5) are brought into engagement with two sliders (21, 22) which are guided to be operable in directions for approaching to/separating from each other respectively. <IMAGE>
Inventors
- 👤 Kenzou Kassai
- 👤 Yoshifumi C/O Aprica Kassai K.K. Yoneda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:30
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47D; A47D13/00; A47D13/10; A47D13/105; A47D9/00; A47D9/012; A47D9/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A chair comprising: a base portion (2) having a leg portion (6, 7); a seat portion (3); two swingable links (4, 5) for suspending said seat portion (3) from said base portion (2) for rendering said seat portion (3) swingable with respect to said base portion (2); and means (21, 22) for changing the parallelism between said two links (4, 5).
Claim 2
Dependent Claim
24 words
A chair in accordance with claim 1, wherein said base portion (2) has a wheel (9, 10) being rollable on a floor face (11).
Claim 3
Dependent Claim
59 words
A chair in accordance with claim 1, wherein said leg portion comprises a front leg (6) and a rear leg (7) crossing with each other and being rotatably coupled with each other at a crosspoint (7), the height of said seat portion (3) being rendered variable with the angle between said front leg (6) and said rear leg (7).
Claim 4
Dependent Claim
29 words
A chair in accordance with claim 1, wherein said parallelism change means comprises means (21, 22) for changing the distance between lower ends of said two links (4, 5).
Claim 5
Dependent Claim
43 words
A chair in accordance with claim 4, wherein said parallelism change means comprises two sliders (21, 22) being guided to engage with said lower ends of said two links (4, 5) and to be operable in directions for approaching to/separating from each other.
Claim 6
Dependent Claim
32 words
A chair in accordance with claim 5, wherein said parallelism change means comprises an interlocking mechanism (29, 30; 44, 45, 46) for symmetrically driving said two sliders (21, 22) with each other.
Claim 7
Dependent Claim
61 words
A chair in accordance with claim 6, wherein said interlocking mechanism comprises cross bars (29, 30) being rotatably supported with respect to said seat portion (3) respectively and arranged in an X shape, said cross bars (29, 30) having first ends being operably coupled to one said slider (21) and second ends being operably coupled to another said slider (22) respectively.
Claim 8
Dependent Claim
25 words
A chair in accordance with claim 7, wherein one said slider (22) is provided with an operating part (26) being engageable with an operator's hand.
Claim 9
Dependent Claim
53 words
A chair in accordance with claim 6, wherein said interlocking mechanism comprises a rotor (44) being rotatably mounted with respect to said seat portion (3), and a coupling bar (45, 46) for operably coupling each point being opposite to a diametral direction of said rotor (4) and each of said sliders (21, 22).
Claim 10
Dependent Claim
26 words
A chair in accordance with claim 9, wherein said rotor (44) is provided with a rib (48) for enabling an operator to readily rotate the same.
Claim 11
Dependent Claim
27 words
A chair in accordance with claim 5, further comprising elastic engaging means (39, 40) for stably maintaining said sliders (21, 22) in end positions of operations thereof.
Claim 12
Dependent Claim
31 words
A chair in accordance with claim 11, wherein said elastic engaging means includes a combination of a plate spring (39) and an engaging wall (40) for elastically engaging with the same.
Claim 13
Dependent Claim
32 words
A chair in accordance with claim 1, wherein a movement of said seat portion (3) is selected in a direction for swinging back and forth with respect to said base portion (2).
Claim 14
Dependent Claim
58 words
A chair having a seat portion (3) mounted for swinging movement relative to a base portion (2) by a swing means (4,5) which is adjustable to a first condition in which the seat portion is maintained substantially parallel to in one plane during swinging movement and a second condition in which the seat portion rocks during swinging movement.
References Cited (Backward Citations)
No citation records indexed.
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