Patent ID: 7418976

Claim:
An apparatus for adjusting fluid pressure, comprising: a body having an axis and an adjustment passage, the adjustment passage positioned angularly to the axis; a seal seat having an adjustment end portion, the seal seat disposed in the body and moveable along the axis; a piston moveably positioned in the body and biased in an open position; a sphere disposed in the body and moveable angularly to the axis, the sphere contacts the adjustment end portion of the seal seat; and an adjustment rod having a first end portion and a second end portion, the adjustment rod movably disposed in the adjustment passage; the first end portion of the adjustment rod contacts the sphere, wherein: in the closed position, the piston contacts the seal seat; the sphere in cooperation with the first end portion of the adjustment rod and the adjustment end portion of the seal seat translates a displacement of the adjustment rod into an axial displacement of the seal seat; the adjustment end portion of the seal seat comprises a groove having a ramp; and the sphere moves in the groove.