A powered lift chair comprises a frame, a backrest, left and right armrests, a seat, a footrest, and a pair of linear actuator mechanisms. A first one of the pair of linear actuator mechanisms is utilized to control the backrest of the chair, while the second one of the pair of linear actuator mechanisms is utilized to move the frame of the chair between a lowered position and an elevated position, as well as to move the seat of the chair between a substantially horizontal orientation and a tilted orientation such that the forward end portion of the seat is tilted downwardly while the rearward end portion of the seat is tilted upwardly, all while the left and right armrests are fixed in position and disposed within horizontal planes. Such compound movements of the chair and the seat will stably assist a person to be moved from a seated position to a standing position while the person is able to grasp and push downwardly upon the left and right armrests whereby the fixed armrests will effectively provide the person with stable platforms upon which the person can reliably, securely, and safely place his or her hands so as to assist himself or herself to move from the seated position to the standing position.

A seating arrangement includes a support shell including a seat portion and a chair back portion each configured to support a seated user, the chair seat portion having a front region and a rear region and the chair back portion having an upper region and a lower region, where the rear region of the seat portion is coupled to the lower region of the chair back portion, a control member including a substantially flexible front support and an attachment point, where the front support engages the support shell in the front region of the seat portion and the control member engages the back portion, and a substantially rigid second support attached to the control member at the attachment point, wherein the control member is an integral, one-piece component including multiple flex regions configured to allow the support shell to move between an upright and reclined position.

A seating arrangement includes a support shell including a seat portion and a chair back portion each configured to support a seated user, the chair seat portion having a front region and a rear region and the chair back portion having an upper region and a lower region, where the rear region of the seat portion is coupled to the lower region of the chair back portion, a control member including a substantially flexible front support and an attachment point, where the front support engages the support shell in the front region of the seat portion and the control member engages the back portion, and a substantially rigid second support attached to the control member at the attachment point, wherein the control member is an integral, one-piece component including multiple flex regions configured to allow the support shell to move between an upright and reclined position.

A drive motor-linear actuator system, for use within, for example, powered chairs, comprises a single drive motor provided with a pair of output drive shafts, and a pair of laterally spaced, left and right-side linear actuators operatively engaged respectively with the pair of output drive shafts. In this manner, the single drive motor can simultaneously actuate both linear actuators in a synchronized manner. The linear actuators are disposed near the opposite left and right sides of the chair so as to provide enhanced stability to the chair while reducing the weight and cost of the chair since only one single drive motor is required to drive both linear actuators.

A drive motor-linear actuator system, for use within, for example, powered chairs, comprises a single drive motor provided with a pair of output drive shafts, and a pair of laterally spaced, left and right-side linear actuators operatively engaged respectively with the pair of output drive shafts. In this manner, the single drive motor can simultaneously actuate both linear actuators in a synchronized manner. The linear actuators are disposed near the opposite left and right sides of the chair so as to provide enhanced stability to the chair while reducing the weight and cost of the chair since only one single drive motor is required to drive both linear actuators.

A patient positioning apparatus for an X-ray dental imaging system includes a head rest and a chair separate from and spaced from the head rest. The chair has a seat portion and a back rest coupled to the seat portion. The chair further includes a locking system that locks a position of the back rest relative to the seat portion.

A patient positioning apparatus for an X-ray dental imaging system includes a head rest and a chair separate from and spaced from the head rest. The chair has a seat portion and a back rest coupled to the seat portion. The chair further includes a locking system that locks a position of the back rest relative to the seat portion.

Chairs, seating systems, chair sub-assemblies and sub-systems, and associated methods of assembly and use. Aspects relate to chairs and methods of assembling chairs including chair controls of a relatively compact and effective design with desirable synchronous raising and tilting motions. Aspects also relate to tilt lock assemblies for achieving secure and effective tilt securement. Additional aspects relate to forward and rearward adjustment, or extension and retraction, of a seating assembly of the chair.

Chairs, seating systems, chair sub-assemblies and sub-systems, and associated methods of assembly and use. Aspects relate to chairs and methods of assembling chairs including chair controls of a relatively compact and effective design with desirable synchronous raising and tilting motions. Aspects also relate to tilt lock assemblies for achieving secure and effective tilt securement. Additional aspects relate to forward and rearward adjustment, or extension and retraction, of a seating assembly of the chair.

An item of seating furniture, in particular an office chair, has a seat carrier for a horizontal seat member, and a backrest carrier for a vertical backrest. The backrest carrier is constructed in a substantially U-shaped manner with two vertically orientated U-shaped members and with a horizontal upper U-shaped member. Wherein, along at least one rotation axis which extends below the seat member, a first rotary joint and a second rotary joint are provided for the lateral tilting movability of the backrest with respect to the seat carrier. The first and second rotary joints are arranged spaced apart from each other along the rotation axis.