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US 6,659,555 B1Granted
Spring unit for weight adjustment of a chair
AssigneeKoenig + Neurath AG
InventorsRolf Scholz, Frank Weisser, Armin Sander, Martin Potrykus
Life of this patent
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Abstract
A spring unit (11) for the weight setting of a chair (1), in particular an office chair, having a gas spring (12) and having a number of further spring elements (17, 18, 19; 27, 28) which can be connected up to the gas spring (12) individually or in combination. The spring unit (11) is expediently arranged between a seat carrier (7) connected to a rotary column (8) of the chair (1), and the seat (3), or a backrest link (4) which extends at least approximately parallel to said seat (3) and belongs to a backrest (2).
Claims13
A spring unit for the weight-setting of a chair, comprising:
- a first gas spring element for the weight-setting of a chair;
- further spring elements;
- and
- an adjusting device for selectively engaging a given combination of said further spring elements to act in parallel with said first gas spring element to adjust the weight setting of the chair.
1 more element
Dependencies are inferred from the claim text.