Patent ID: 9033360
Filing Date: 2015-05-19
Classification: A61G

Abstract:
1. A chair assembly for a power wheelchair, the chair assembly comprising: a seat assembly including a seat base and a seat back; a tilt cartridge unit including an actuator, a linkage, and a frame; the actuator being configured to tilt the seat assembly in response to a signal from a controller; a lift cartridge unit including left and right linear actuators and left and right scissor mechanisms, the left linear actuator operatively coupled to the left scissor mechanism and the right linear actuator operatively coupled to the right mechanism, each scissor mechanism including first and second scissor legs, the left linear actuator and left scissor mechanism being located on an opposing side of the chair assembly from the right linear actuator and right scissor mechanism to define a central space therebetween in which the tilt mechanism nests at least when the tilt cartridge unit is in a retracted position; and the linear lift actuators being configured to vertically lift the seat base, without tilting the seat base, in response to a signal from a controller, and the tilt actuator being configured to tilt the seat base, without lifting the seat base, in response to a signal from the controller, wherein each one of the linear actuators is a power screw that translates a nut, the first scissor leg having a translatable end that translates along with the nut.