Chairs and seats – Legrest or footrest interconnected to move relative to... – Bottom and back movable as unit relative to legrest
Patent
1990-07-23
1994-05-17
Chen, Jose V.
Chairs and seats
Legrest or footrest interconnected to move relative to...
Bottom and back movable as unit relative to legrest
297 68, 297DIG10, A47C 102
Patent
active
053121538
ABSTRACT:
A recline lift chair operates between an upright position and a reclined position under power such that the backrest moves away from an adjacent wall. The chair comprises a base to which is pivotally connected a lift mechanism. The lift mechanism is moved between an upright position and a lift position by a power actuator pivotally secured between the base and the lift mechanism. Pivotally supported on the lift mechanism is a recliner mechanism that includes a pair of four-bar linkages to which the seat and backrest are fastened. The power actuator acts through a control linkage of the recliner mechanism to move the four-bar linkages between an upright position and a reclined position. Movement of the four-bar linkages from the upright position to the reclined position locates the seat and backrest upwardly and forwardly relative to their respective locations when in the upright position to move the backrest away from the wall. An adjustment mechanism interposed between the control linkage and the four-bar linkages enables movement of the four-bar linkages without actuation of the power actuator. In a modified embodiment, the backrest is tiltable relative to the seat. The backrest does not move closer to a wall when the chair is operated between the upright position and an intermediate position, and the backrest moves only minimally toward the wall when the chair is operated from the intermediate position to a fully reclined position.
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Kinematics & Linkage Design, Allen S. Hall, Jr. 1961, pp. 1-10.
Chen José V.
Ortho-Kinetics Inc.
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