Patent ID: 7320334

Claim:
A valve for use in a hydraulic system between a first fluid side and a second fluid side, the valve comprising: a valve seat moveable between a first, closed position and a second, open position, the valve seat having a first surface and a second surface connected by a generally circular periphery, wherein fluid flows from the first fluid side to the second fluid side around the periphery when the valve seat is in the second, open position; a first opening formed in the first surface of the valve seat, a second opening formed in the second surface of the valve seat and a first passage extending through the valve seat from the first opening to the second opening, the first passage having a generally annular inner surface; a valve stem extending entirely through the first passage and the first and second openings, the valve stem having a closed position where it prevents fluid from flowing through the first passage and an open position where it permits fluid to flow through the first passage from the second fluid side to the first fluid side; and a plurality of ribs extending generally parallel to the first passage, each rib comprising a first end abutting the second surface of the valve seat, a second end offset from the second surface of the valve seat, an inner edge formed generally tangential to the inner surface of the first passage, an outer edge formed opposite the inner edge and a plurality of sides extending between the first and second ends and extending between the inner and outer edges.