Abstract: A gas spring-powered fastener driver includes a cylinder configured to contain a pressurized gas therein, a piston disposed within and movable along the cylinder, a driver blade attached to the piston and moveable therewith between a top-dead-center (TDC) position and a bottom-dead-center (BDC) position, the driver blade configured to drive a fastener when moved from the TDC position toward the BDC position, and a two-way valve in fluid communication with the cylinder. The two-way valve is configured to selectively permit an inbound flow of gas into the cylinder, permit an outbound flow of gas from the cylinder, and seal the cylinder to inhibit both inbound flow and outbound flow of gas from the cylinder. The two-way valve includes an interior end in fluid communication with the cylinder, an exterior end in selective fluid communication with the surroundings of the gas spring-powered fastener driver, and a sealing area.

Abstract: A gas spring-powered fastener driver includes an outer cylinder configured to contain a pressurized gas therein, an inner cylinder disposed within the outer cylinder, a piston disposed within the inner cylinder and moveable along the inner cylinder, a driver blade attached to the piston and moveable therewith between a top-dead-center (TDC) position and a bottom-dead-center (BDC) position, the driver blade configured to drive a fastener when moved from the TDC position toward the BDC position, and a two-way valve coupled to the outer cylinder. The two-way valve configured to selectively permit a first flow of gas into the outer cylinder and to selectively permit a second flow of gas from the outer cylinder.

Abstract: A gas spring-powered fastener driver includes a cylinder, a storage chamber cylinder having pressurized air in communication with the cylinder, a moveable piston positioned within the cylinder, a driver blade attached to the piston and movable therewith between a top-dead-center position and a bottom-dead-center position, the driver blade defining a driving axis, a lifter operable to move the driver blade from the bottom-dead-center position toward the top-dead-center position, the lifter is configured to engage the driver blade when moving the driver blade from the bottom-dead-center position toward the top-dead-center position, a bumper positioned beneath the piston in a vertical direction to absorb impact energy from the piston, and a valve positioned in the storage chamber cylinder. In response to the piston compressing the bumper while absorbing impact energy from the piston, the valve adds pressurized air from the cylinder to the storage chamber cylinder.

Abstract: A gas spring-powered fastener driver includes an outer cylinder configured to contain a pressurized gas therein, an inner cylinder disposed within the outer cylinder, a piston disposed within the inner cylinder and moveable along the inner cylinder, a driver blade attached to the piston and moveable therewith between a top-dead-center (TDC) position and a bottom-dead-center (BDC) position, the driver blade configured to drive a fastener when moved from the TDC position toward the BDC position, and a two-way valve coupled to the outer cylinder. The two-way valve configured to selectively permit a first flow of gas into the outer cylinder and to selectively permit a second flow of gas from the outer cylinder.

Abstract: A gas spring-powered fastener driver includes a cylinder, a storage chamber cylinder having pressurized air in communication with the cylinder, a moveable piston positioned within the cylinder, a driver blade extending from a first side of the piston and movable therewith between a top-dead-center position and a bottom-dead-center position, a one-way seal carried onboard the piston and disposed between the piston and the cylinder, the one-way seal being configured permit a bypass flow of pressurized air from the first side of the piston, past the one-way seal, and into a space within the cylinder adjacent an opposite, second side of the piston during movement of the piston and driver blade from the top-dead-center position to the bottom-dead-center position, thereby increasing a pressure of the pressurized air within the cylinder and storage chamber cylinder, and a pressure relief valve in fluid communication with the storage chamber cylinder.