SPOOL VALVE WITH INTERNAL PASSAGE

摘要

A spool type valve especially adapted for controlling flow of an adhesive has two spaced apart enlargements in an axial opening with an entry connection to the first enlargement and an exit connection to the second enlargement. The slidable spool has an axial opening which has closed ends and a length greater than the distance between the enlargements. The closed axial opening has two sets of radial openings which are spaced apart the same distance as the enlargements. A bearing portion on the spool is movable into the second enlargement.