Motor shaft security apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – With mechanical motion-converting means

Reexamination Certificate

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Reexamination Certificate

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07445061

ABSTRACT:
A bearing assembly is situated to conduct axial forces between the general housing and the output shaft by way of an intermediate sleeve that is secured to the output shaft outside the general housing and is axially confined by a bearing assembly secured to the general housing.

REFERENCES:
patent: 3840080 (1974-10-01), Berryman
patent: 4308927 (1982-01-01), Fox
patent: 4811798 (1989-03-01), Falgout
patent: 6540020 (2003-04-01), Falgout

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