within the perimeter. The opening can face at least partly in a direction perpendicular to a major planar surface of the support. The curved guide can curve so that one end of the support is more parallel to a major planar surface of the support than another end of the curved guide such...
” The valve described by the latter disclosure is of simple construction and is very intuitive and easy for a user to change the flow direction by rotating a lever. The general design of a lever and a cross-shaped set of tubes follows a manual reversing valve design used in plumbing ...