by changing the inclination of the axis of the cylinder barrel relative to the swash plate

Full Title

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00) > having cylinder axes coaxial with, or parallel or inclined to, main shaft axis > Control > of machines or pumps with rotary cylinder blocks > by varying the relative positions of a swash plate and a cylinder block > by changing the inclination of the axis of the cylinder barrel relative to the swash plate