Square shaft linear actuator

Details Square shaft linear actuator Square shaft linear actuator

2006-10-24

2009-06-16

Hess, Douglas A (Department: 3651)

Conveyors: power-driven

Conveyor section

Reciprocating conveying surface

C198S750200, C198S750400, C074S089320, C074S089330

Reexamination Certificate

active

07546915

ABSTRACT:
A linear actuator is provided comprising a housing, a rectangular elongate shaft operably coupled to the housing, and a scraper assembly. The shaft has a hardened bearing surface in sliding engagement with a hardened bearing surface of the housing, thus providing a hard-on-hard bearing between the shaft and housing, wherein the shaft is prevented from rotating with respect to the housing. The scraper assembly comprises first and second resilient members positioned within a recess of the housing, wherein one or more scraper blades are disposed between the first and second resilient members. A retaining member coupled to the housing generally compresses the first and second resilient members within the recess, therein biasing a scraping edge of the one or more scraper blades against the shaft bearing surface, wherein the retaining member, one or more scraper blades, and the first resilient member are operable to clear debris from elongate shaft.

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“Welker Shot Pin Assemblies”, ISO 9001: 2000 Certified, Revised Apr. 2004, 20 pgs.

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