Abstract: Provided herein is an electric powered digging apparatus comprising: a powerhead, the power head comprises a motor and a gearbox; a handle frame, the powerhead is mounted onto the handle frame; and a drill bit, the drill bit is driven by the motor to rotate around a longitudinal axis, the electric power digging apparatus further comprises: a first safety mechanism, wherein the first safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal axis for an angle larger than a first threshold, and a second safety mechanism, wherein the second safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal drive axis at an angular speed larger than a second threshold FIG.

Abstract: A fitting assembly having a longitudinal axis including a fitting body having a seat, a threaded drive nut, a tube, a first (rear) ferrule and a second (front) ferrule receivable over the tube, the first (rear) ferrule having a first driven end and a first driving end and defining a first (rear) ferrule length (FFL) therebetween, the second (front) ferrule having a second driven end and a second driving end and defining a second (front) ferrule length (SFL) therebetween, and a seal depth (SD) of the tube defined by a distance between the seat of the fitting body and the second driving end. A surface of the second driven end of the second (front) ferrule is a diametrical surface having a diameter (DSF). At least one of the following apply: SFL/SD?0.9; 2.7?SFL/DSF?2.2; and SFL/FFL?4.0.

Abstract: A fitting assembly having a longitudinal axis including a fitting body having a seat, a threaded drive nut, a tube, a first (rear) ferrule and a second (front) ferrule receivable over the tube, the first (rear) ferrule having a first driven end and a first driving end and defining a first (rear) ferrule length (FFL) therebetween, the second (front) ferrule having a second driven end and a second driving end and defining a second (front) ferrule length (SFL) therebetween, and a seal depth (SD) of the tube defined by a distance between the seat of the fitting body and the second driving end. A surface of the second driven end of the second (front) ferrule is a diametrical surface having a diameter (DSF). At least one of the following apply: SFL/SD?0.9; 2.7?SFL/DSF?2.2; and SFL/FFL?4.0.

Abstract: A dynamic seating and walking wheelchair includes an active seat and a frame. The active seat is configured to move from a seated position to a standing position. The active seat includes a seat back with an upper end and a lower end, and a seat bottom with a front end and a rear end. The rear end of the seat bottom is rotatable about a movable pivot axis approximate to the lower end of the seat back from the seated position of approximately horizontal to the standing position of approximately vertical. The frame is configured to support the active seat. Wherein, when the active seat moves from a seated position to a standing position, the movable pivot axis moves both up and backwards.

Abstract: A dynamic seating and walking wheelchair includes an active seat and a frame. The active seat is configured to move from a seated position to a standing position. The active seat includes a seat back with an upper end and a lower end, and a seat bottom with a front end and a rear end. The rear end of the seat bottom is rotatable about a movable pivot axis approximate to the lower end of the seat back from the seated position of approximately horizontal to the standing position of approximately vertical. The frame is configured to support the active seat. Wherein, when the active seat moves from a seated position to a standing position, the movable pivot axis moves both up and backwards.

Abstract: A dynamic seating and walking wheelchair includes an active seat and a frame. The active seat is configured to move from a seated position to a standing position. The active seat includes a seat back with an upper end and a lower end, and a seat bottom with a front end and a rear end. The rear end of the seat bottom is rotatable about a movable pivot axis approximate to the lower end of the seat back from the seated position of approximately horizontal to the standing position of approximately vertical. The frame is configured to support the active seat. Wherein, when the active seat moves from a seated position to a standing position, the movable pivot axis moves both up and backwards.