| 主权项 |
1. A fluid injector having an inlet, an outlet, and a passageway providing a fluid flow conduit from the inlet to the outlet, the fluid injector comprising:
a valve structure movable in the passageway between a first position and a second position, the valve structure including a hollow tube having a longitudinal axis and a valve member connected to an end of the tube by a weld, with a weld zone being defined inside of the tube generally adjacent to the weld, the tube having surfaces defining a through-hole that is disposed transversely with respect to the longitudinal axis of the tube, the through-hole being constructed and arranged to permit the fluid to enter an interior of the tube, a seat, at the outlet, having at least one seat passage in communication with the passageway, the seat contiguously engaging a portion of the valve member in the first position thereby closing the at least one seat passage and preventing fluid from exiting the at least one seat passage, the valve member, in the second position of the valve structure being spaced from the at least one seat passage so that fluid can move through the passageway and exit through the at least one seat passage, and corrosion prevention structure disposed in the tube between the through-hole and the valve member, constructed and arranged to prevent the fluid in the tube from accessing the weld zone. |
