Title: Idler construction for earth-moving elevator

Abstract: An idler construction for an elevator used for earth moving purposes at the front of a scraper bowl, the elevator having a frame which extends upwardly and rearwardly from the region of the scraper blade supporting a pair of endless chains with transversely arranged flights. The chains are driven at the upper end of the frame and trained about rollers at the lower end so that the flights sweep the loosened soil backwardly into the bowl. Idler wheels are mounted upon brackets intermediate the ends of the frame members for supporting the return runs of the respective chains in a shallow apex spaced from the elevator frame, the idlers being coaxial and alined with the chains and having cylindrically surfaced rims of durable resilient material.

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Inventors: Johnson, Clifford E. (Peoria, IL, US)
Freeburg, Dale O. (East Peoria, IL, US)
Hyler, John H. (Peoria, IL, US)

Application Number: 512729
Filing Date: 1974-10-07
Publication_date: 1976-01-27
Assignee: Westinghouse Air Brake Company (Pittsburgh, PA)
Primary Class(es): 37/423 198/813, 474/110, 474/156
Other Classes:
US Patent Ref:

2789438	Apr, 1957	Hutchinson	74/242.
3426456	Feb, 1969	Keith et al.	37/8.

Other Refs:
Primary Examiner: Pellegrino, Stephen C.
Assistant Examiner:
Attorney: Wolfe, Hubbard, Leydig, Voit & Osann, Ltd.