Abstract: This disclosure describes systems and methods for providing drive pressure ventilation of a patient. The disclosure describes a novel breath type that provides a spontaneous breath type that allows for the calculation of drive pressure that does not require invasive monitoring.

Abstract: A gear changing mechanism is adapted to engage an endless chain in a chain drive. The mechanism includes a rotary shaft and a gear set located around the shaft. The gear set has a plurality of generally circular gears of different diameter adapted to mesh with the chain, and the gear set has a plurality of operating positions each corresponding to partial wrapping of the chain about a different one of the gears. Each gear is formed as a plurality of separate gear segments that align circumferentially to define the gear. The gear set also comprises a plurality of separately moveable supporting structures each of which has rigidly fixed thereto one gear segment from each of the gears. Mounting means are provided that mount each of the supporting structures to the shaft for rotation together with the shaft and for axial displacement along the shaft.

Abstract: Bricklaying equipment includes a guideway extending along brick masonry being erected. A bricklaying machine displaces along the guideway. It has a robotic arm with an upper arm and a forearm. The upper arm pivots about a shoulder joint, and the forearm pivots relative to the upper arm at an elbow joint. A wrist joint permits a tool assembly, including a mortar-dispensing mechanism and a brick-gripping mechanism, to pivot relative to the forearm. The mortar-dispensing mechanism includes a form that receives and shapes a mortar charge, and a sliding gate mechanism that discharges the shaped charge. The arm is operated with a single motor that pivots the upper arm. Linkage constrains the tool assembly to move along a horizontal axis as the upper arm pivots and to remain in a fixed angular orientation relative to vertical. The arm is operated in response to sensors that detect vertical and horizontal distances to a mason's line.