Drive shaft, drive assembly and related method

Details Drive shaft, drive assembly and related method Drive shaft, drive assembly and related method

1992-05-01

1993-05-11

Kundrat, Andrew V.

Joints and connections

With adjunctive protector, broken parts retainer, repair,...

Position or guide means

403343, B25G 300

Patent

active

052095959

ABSTRACT:
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 helical 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.

REFERENCES:
patent: 3293993 (1966-12-01), Lanman
patent: 3495123 (1970-02-01), Raddatz
patent: 3914067 (1975-10-01), Leto

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