Patent ID: 7147380

Claim:
A pressure screw assembly comprising a generally cylindrical body having a pair of end faces and a longitudinally axis extending through said body and said end faces; said body having first, second and third concentric interconnected cylindrical bores between said end faces; said first bore adjacent one of said end faces being larger in diameter than said other bores; said second bore adjacent to the other of said end faces being larger in diameter than said third bore and being internally threaded; said third bore connecting said first and second bores; said cylindrical body having external threads throughout the major portion of its length and including a leading thread and a trailing thread; the remaining portion of the length of said cylindrical body being provided with an external polygonal shaped head between said other end face and said trailing thread; a floating annular thrust pad received in said first bore and having a centrally located threaded bore extending part way therethrough; a bolt having threads on one end and a head on the other end with said threaded end and said head of the bolt being separated by a cylindrical portion; said bolt located in the bores of said pressure screw body with said head in said second bore, said cylindrical portion in said third bore and said threaded end threaded into the threaded bore of said thrust pad; a biasing means received in said second bore and abutting the head of said bolt; and an adjustable externally threaded adjusting screw threaded into said second bore and engaging said biasing means.