Linear actuator with wear-resistant ceramic bushing

Details Linear actuator with wear-resistant ceramic bushing Linear actuator with wear-resistant ceramic bushing

2004-11-10

2008-11-04

Fenstermacher, David M (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S089360, C074S089420, C074S441000, C074S424750, C384S907100

Reexamination Certificate

active

07444894

ABSTRACT:
An actuator including a threaded shaft and a carriage having a shaft engaging portion coupled to the threaded shaft. The carriage is moveable in a direction parallel to an axis of the threaded shaft upon a relative rotation between the threaded shaft and the shaft engaging portion. A ceramic bushing is coupled to the shaft engaging portion of the carriage, the bushing surrounding the threaded shaft. The ceramic bushing is much harder than heretofore used materials and results in greatly reduced particulate formation. The carriage or portion thereof can be formed around the bushing, e.g., by injection molding.

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patent: 6734582 (2004-05-01), Corbett, Jr. et al.
patent: 2003/0053262 (2003-03-01), Clayton et al.

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