F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
F16C 3/02 (2006.01) B23P 11/00 (2006.01) B23P 19/00 (2006.01) F01D 5/02 (2006.01) F16D 1/06 (2006.01)
Patent
CA 2094450
Abstract of the Disclosure A drive shaft has a driving end and a driven end and is provided at the driving end with an external helical thread and a cylindrical pilot surface disposed between the thread and the driving end, the pilot surface having a diameter approximately equal to the inner diameter of the thread. During a mounting of an impeller to the drive shaft, a crest flat of an internal heli- cal thread in the impeller rides on the pilot surface. The shaft has an additional pilot surface on the other side of the shaft thread. Upon a mounting of the impeller to the shaft, the two pilot surfaces on the shaft engage two precision impeller hub bores which straddle the threads to provide a controlled close fit of impeller and shaft to one another and to maintain the geometric axes of impeller and shaft true with one another. B19-004.001 RB131196285
Baker Hughes Incorporated
Gowling Lafleur Henderson Llp
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