Ball screw

Details Ball screw Ball screw

1993-07-13

1994-12-20

Herrmann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

744248R, 74459, F16H 2520

Patent

active

053737547

ABSTRACT:
A ball screw that, together with contributing to reduction of the cost of the device wherein it is incorporated as a feed mechanism, eliminates the need for adjustment work performed to maintain the operation state of the object being operated, for example, an automatic door. The thread pitch of a threaded portion of a screw shaft is varied from one end to the other.

REFERENCES:
patent: 772917 (1904-10-01), Bitner
patent: 3389612 (1968-06-01), Thireau
patent: 4542661 (1985-09-01), Teramachi

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