Patent ID: 6910871
Filing Date: 2005-06-28
Classification: F04B,Y10T

Abstract:
1. A plunger pump housing for use with a valve stem guide and spring retainer assembly, the plunger pump housing comprising: a suction valve bore having a portion with substantially circular cross-sections for accommodating a circular suction valve, a cylindrical transition area, a shoulder corresponding to a suction valve top stem guide and spring retainer shoulder mating surface, and a first centerline; a discharge valve bore having a portion with substantially circular cross-sections for accommodating a circular discharge valve, a cylindrical transition area, a shoulder corresponding to a discharge valve lower stem guide shoulder mating surface, and a second centerline, said first and second centerlines being colinear; a cylinder bore having a proximal packing area and a distal transition area, said packing area having a substantially circular cross-section and a third centerline, said third centerline being coplanar with said first and second centerlines; and an access bore having a cylindrical transition area with elongated cross-sections for facilitating access to interior portions of the plunger pump housing, and a fourth center line, said fourth centerline being colinear with said third center line; wherein said suction valve bore transition area has an elongated cross-section 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 an elongated cross-section 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 cylinder bore transition area has elongated 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; wherein said access bore transition area has elongated 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; and wherein each said bore transition area has at least one adjacent chamfer for smoothing bore interfaces.