Patent Number: 6,293,309

Title: Control valve apparatus

Abstract: The invention relates to a control valve apparatus (1) providing reciprocalmotion, comprising a spool (2) and sleeve (3), a passage (4) for fluid,which is hydraulic fluid in the embodiment, the passage (4) being openableand closable by the spool (2) and sleeve (3), ports (A, B, C) for fluid,and at least one seal (5, 6), the arrangement being such that a seat ofone seal (5) reacts with a seat of another (6) whereby to open the anotherseal (6).

Inventors: Lim; Kok Yong (Singapore, SG)


International Classification:

Expiration Date: 09/25/2013