Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.

Abstract: A chair frame for supporting a seat and seat back in a novel manner. The material of the seat, such as fabric or leather, is supported by the frame in partial tension to avoid sagging and to allow independent torsional movement of the seat portions supporting each leg of the chair user. The chair frame geometry and the tensioned seat provide a flexible chair that provides a new seating experience that combines lounge and rocking chair type characteristics. Additionally, the chair frame can be provided as a one piece rigid frame or a stackable, foldable, or collapsible frame.