Patent ID: 9249800
Filing Date: 2016-02-02
CPC Classification: F04C,F16K,Y10T

Claim Text:
1. A bypass directional control valve comprising: a valve sleeve received in a housing, said housing having an input opening to receive a source of fluid, and said input opening communicating with two sets of inlet ports formed through said valve sleeve, and into an interior bore of said valve sleeve, two sets of outlet ports, with one on each of two axial sides of said sets of inlet ports, and extending through said valve sleeve, with said outlet and said inlet ports all being cylindrical holes, and a diameter of said sets of inlet ports being greater than a diameter of said sets of outlet ports, said outlet ports communicating to outlet openings in said housing; a valve spool movable along an axis within said bore of said valve sleeve, said valve spool having a land associated with each of said sets of said inlet ports, and a spring biasing said valve spool in a first direction such that a first land blocks a first of said sets of outlet ports, and a second land is spaced from a second of said sets of outlet ports, with a pressure tap to receive a pressure control signal to cause said valve spool to selectively move against the force of said spring such that said second land may block said second set of outlet ports and said first land opens said first set of outlet ports; said valve sleeve extends for a first axial distance between opposed ends, and a first of said sets of said inlet ports is spaced from said end by a second distance, and a ratio of said first distance to said second distance is between 3.600 and 3.615; said outlet ports in said two sets of outlet ports are circumferentially aligned, and said inlet ports in said two sets of inlet ports are circumferentially staggered between the two sets; and said valve spool extends for a first length, and a second length defined between an end of said valve spool which receives said spring, and an end of said first land which is closest to said spring, with a ratio of said first length to said second length being between 3.818 and 3.864; said first and second lands have edge breaks at an edge, and said lands have a nominal outer diameter, with an edge break outer diameter defined to a beginning of the edge break on said lands, and a ratio of said edge break outer diameter to said nominal outer diameter being between 0.995 and 1.000.