Patent ID: 6685451
Filing Date: 2004-02-03
Classification: F04B,Y10T

Abstract:
A valve assembly for an oil pumping system comprising:a shell having an upper end and a lower end, said shell having an interior passageway; a seat affixed in a lower end of said shell, said seat having an interior diameter; a ball movably positioned within said shell, said ball having a diameter greater than said interior diameter of said seat; and a cage positioned within said interior passageway of said shell, said cage having an open bottom facing said seat and an open top facing said upper end of said shell, said cage having an upper portion and a lower portion and a ball retaining section, said cage having a first ported area formed in said lower portion between said bottom and said ball retaining section, said cage having a second ported area formed in said upper portion between said ball retaining section and said top, said cage having a first flanged surface at said top and a second flanged surface at said bottom, each of said first and second flanged surfaces having a diameter greater than that of a remainder of said cage.