Reclining chair with rear impingement prevention

A method of reclining relative to a fixed seat, comprising:

• slidably connecting a movable seat portion to a fixed upright seat portion which is fixed in an upright position, the movable seat having a vertical back portion and a horizontal sitting portion;
• the slidably connecting using a first attachment part, attached to the fixed upright seat portion, the first attachment part that slidably holds the movable seat portion at a top portion of the vertical back portion, and a second attachment part, attached to the horizontal sitting portion, the first attachment part that slidably holds the movable seat portion at a front portion of the horizontal sitting portion,
• sliding the movable seat portion relative to the first attachment part, using the first attachment part and the second attachment part holding the movable seat portion and allowing the movable seat portion to move relative to the fixed upright seat portion, where the first attachment part allows the movable seat portion to move in the vertical direction and the second attachment part allows the movable seat portion to move in the horizontal direction;
• the sliding comprising sliding between a) an upright position where the movable seat portion is upright, and where in the upright position, a back portion of the moveable seat portion is parallel to the vertical back portion of the fixed seat portion, and between b) a reclined position where the movable seat portion is in a position of, where in the reclined position, a space between the back portion of the movable seat portion, and the back portion of the fixed upright seat portion is lengthened, and the fixed upright seat portion remains upright and where a space between a lower portion of the back portion of the movable seat portion and the lower portion of the fixed upright seat portion, is greater than a space between an upper portion of the back portion of the movable seat portion and an upper portion of the fixed upright seat portion.