Leadscrew mechanical drive with differential leadscrew...

Details Leadscrew mechanical drive with differential leadscrew... Leadscrew mechanical drive with differential leadscrew...

2007-07-31

2007-07-31

Fenstermacher, David M. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424940

Reexamination Certificate

active

10799058

ABSTRACT:
A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch, and a leadscrew follower structure engaged to the leadscrew. The leadscrew follower structure includes a threaded insert having an insert thread with a nonzero insert thread pitch different from the leadscrew thread pitch, which is threadably engaged to the leadscrew. The leadscrew follower structure further includes a bearing in which the threaded insert is received and which permits the threaded insert to rotate about the insert axis, a bearing support in which the bearing is received, and a preload structure which biases the insert thread against the leadscrew thread.

REFERENCES:
patent: 4794810 (1989-01-01), Parsons
patent: 5533417 (1996-07-01), Devenyi
patent: 5636549 (1997-06-01), Devenyi
patent: 5732597 (1998-03-01), Devenyi
patent: 5857383 (1999-01-01), Devenyi
patent: 2004/0237687 (2004-12-01), Devenyi

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