Patent ID: 7178518

Claim:
A spacer unit inlet member integrally constructed of rigid or non-flexible material, said member capable of selectively mounting about its opening a metered dose inhaler (MDI) actuator having an outlet of given size or shape, and comprising: (i) a channel providing an opening of said inlet member, said channel being formed by a wall substantially parallel to a rotational axis of said channel, wherein a peripheral edge of said wall is shaped substantially as a truncated oval having a pair of opposing curved sides and a pair of opposing chordal ends substantially perpendicular to a major axis of said peripheral edge, (ii) a pair of opposing curved walls substantially parallel to the rotational axis of said channel, and having an outermost edge comprising a substantially oval shape, and (iii) a wall substantially perpendicular to the rotational axis of said channel and positioned between said wall of said channel and said opposing curved walls.