Japanese Patent JPH0471523

B2

A chair of the tilting type which includes a base (10), a seat (11) and back (12), with the base (10) pivotally supporting the seat (11) with two opposite non-parallel links of a four bar non-parallel linkage (24), with one of the opposite links (38, 39) extending at (45, 47) to support the back (12) and also being formed to provide an arm rest (44). The four bar linkage (24) is duplicated on each side of the chair by forming the two opposite non-parallel links or cranks (29, 30, 38, 39) from the upturned ends of the tubes (26, 27) which pass through the base (10) in parallel but vertically offset fashion, the base (10) thus forming the fixed bar of the linkage (24) with its opposite bar or coupler being formed by the seat (11). A spring (62) within the base (10) is operative on one of the tubes (26, 27) to urge the chair to an upright position. The tubes (26, 27) are pivotally connected to the seat (11) and one of the tubes (27) extends and is fixedly connected to the back (12) in a manner to emphasize the isolated and separate appearance of the seat (11) and back (12). With the above construction the seat (11) and back (12) both tilt in their proper natural body support positions but in a respective ration of about 1 to 3. The chair thus obviates some of the problems of prior chairs where only the back tilts or both the seat and back tilt as a unit

NIIRUSU DEIFURIENTO

JP7252582A

November 16, 1992

April 28, 1982

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HAUZAAMAN INC INTERN FUAANICHAA ANDO TEKUSUTAIRU DEIBIJON

A47C1/024; A47C1/032; A47C3/026

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