Patent ID: 7004843

Claim:
A mud motor universal joint assembly comprising: a) a first cylindrical body member having a means for connecting to a drive at one end and a mortised pair of diametrically quartered tang portions, a central internal blind bore, and at least one perpendicular through bore intersecting said central internal blind bore at the opposite end; b) a second cylindrical body member having a means for connecting to a drive at one end and a mortised pair of diametrically quartered tang portions, a central internal blind bore, and at least one perpendicular through bore intersecting said central internal blind bore at the opposite end, said tang portions of said first and second cylindrical members being juxtaposed in a meshing manner; c) a cylindrical bearing member slidably inserted within each said internal blind bore; d) a connecting rod having a neck portion and a crowned head portion at each end, one end of said connecting rod being slidably inserted within each said central blind bore and in contact with each said cylindrical bearing member; and e) at least one retainer pin interposed within said perpendicular through bore of each cylindrical member in contact with each said neck portion of said connecting rod.