Patent ID: 7186097

Claim:
A plunger pump housing with offset access bore, the plunger pump housing comprising: a suction valve bore having a portion with substantially circular transverse cross-sections for accommodating a circular suction valve, a transition area for facilitating bore interfaces, and a first centerline; a discharge valve bore having a portion with substantially circular transverse cross-sections for accommodating a circular discharge valve, a transition area for facilitating bore interfaces, and a second centerline, said first and second centerlines being colinear; a plunger bore having a proximal packing area, a distal transition area for facilitating bore interfaces, and a central area between said packing area and said transition area, said central area having a substantially circular transverse cross-section with a central area diameter and a third centerline, said third centerline being coplanar with said first and second centerlines; and an offset access bore having a cylindrical portion for accommodating an access bore plug and a transition area for facilitating bore interfaces, said cylindrical portion having a fourth centerline, said fourth centerline being coplanar with said first, second and third centerlines and parallel to said third centerline, and said fourth centerline being spaced a predetermined distance apart from said third centerline toward said suction valve bore; wherein said suction valve bore transition area has elongated transverse cross-sections substantially perpendicular to said first centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines; wherein said discharge valve bore transition area has elongated transverse cross-sections substantially perpendicular to said second centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines; wherein said plunger bore transition area has elongated transverse cross-sections substantially perpendicular to said third centerline and with a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines; and wherein said offset access bore cylindrical portion and said offset access bore transition area have elongated transverse cross-sections substantially perpendicular to said fourth centerline, each said elongated access bore cross-section having a long axis substantially perpendicular to a plane containing said first, second, third and fourth centerlines.