Control valve assembly for pumps and injectors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 12, 2000
Grant Date -
N/A
app pub date -
Mar 10, 1999
filing date -
Mar 10, 1999
priority date (Note) -
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Abstract
Pumps and injectors utilize a control valve having a valve body with a valve stem having a step adjacent to the seating surface. The step extends a limited distance away from the seating surface to provide limited pressure relief when the valve body is at an intermediate position that is between the opened and closed positions. Step cross-section and axial length may be configured based on desired hydraulic behavior. In a preferred embodiment, the control valve step is configured for injection rate shaping.
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