Ball screw device

Details Ball screw device Ball screw device

2007-07-31

2007-07-31

Joyce, William C (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424820, C074S424830

Reexamination Certificate

active

10487509

ABSTRACT:
A ball screw device comprises a nut having a thread groove in the inner peripheral surface thereof, a screw shaft having a thread groove in the outer peripheral surface thereof and a plurality of balls interposed between the respective thread grooves. In the screw shaft, the thread groove is of at least substantially one turn. In the screw shaft is provided a ball circulation groove for coupling the downstream and upstream sides of the thread groove so that the balls are returned to the upstream side from the downstream side so as to be thereby circulated.

REFERENCES:
patent: 2450282 (1948-09-01), Jackson
patent: 4070921 (1978-01-01), Arnold
patent: 2003/0051569 (2003-03-01), Kapaan et al.
patent: 59-17058 (1984-01-01), None
patent: 2000-18360 (2000-01-01), None

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