Patent ID: 6394550
Filing Date: 2002-05-28
Classification: A47C

Abstract:
A chair adjustment assembly comprises:a base seat, a pneumatic mount disposed on the base seat, a connection mount, an L-shaped plate disposed on a bottom of the connection mount, and an adjustment device, the base seat having a U-shaped frame and two lug joints, the connection mount having two arm bars connected to the lug joints, a spindle fastening the arm bars and the lug joints together, the adjustment device having a positioning seat, a connection seat disposed on the positioning seat, a washer, a coiled spring, a first gasket having a first round aperture, a first oblong plate having a first oblong hole and a first circular hole, at least a second gasket having a second round aperture, at least a second oblong plate having a second oblong hole and a second circular hole, a tube, a nut, the connection seat receiving the washer and the coiled spring, the positioning seat having a bottom slot and a round hole, the positioning seat receiving the first gasket, the first oblong plate, the second gasket and the tube, a shaft passing through the connection seat, the washer, the coiled spring, the first gasket, the first oblong plate, the second gasket, the second oblong plate, the tube and the nut, a square plate inserted in the connection seat, and a control handle, the control handle having a connection block having a through hole, the connection seat having an inner interior and a through aperture, the connection block inserted in the connection seat, a pintle fastening the connection block and the connection seat together through the through aperture of the connection seat and the through hole of the connection block, the U-shaped frame receiving the first oblong plate and the second oblong plate, and a pin fastening the first oblong plate, the second oblong plate, and the U-shaped frame together.