Title: Power scraper with apron on a movable pivot axis

Abstract: A power scraper, of the type which has a bowl with a forward cutting edge and an apron which assists in the loading of the bowl, closes the loaded bowl, and is elevated for dumping, is provided with improved apron operating means. The operating means includes a translating means which shifts the apron pivot axis from an initial position that it occupies when the apron is elevated so that the path of the lower edge of the apron to closed position is forward of and below an arc of a circle struck about said initial position of the pivot axis.

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Inventors: Hahn, Ray H. (Dunlap, IL, US)
Eftefield, Larry G. (Joliet, IL, US)

Application Number: 644231
Filing Date: 1975-12-24
Publication_date: 1977-03-15
Assignee: Caterpillar Tractor Co. (Peoria, IL)
Primary Class(es): 37/430
Other Classes:
US Patent Ref:

1891266	Dec, 1932	Le Tourneau	37/126.
2344313	Mar, 1944	Lichtenberg	37/129.
2396287	Mar, 1946	Robb	37/126.
2529848	Nov, 1950	Murray	37/126.
2642681	Jun, 1953	Wagner	37/126.
3471952	Oct, 1969	Peterson	37/129.
3571955	Mar, 1971	Eiger	37/4.
3574960	Apr, 1971	Peterson et al.	37/129.
3708896	Jan, 1973	Eftefield	37/126.
3739506	Jun, 1973	Klett et al.	37/126.
3889404	Jun, 1975	Eftefield	37/126.

Other Refs:
Primary Examiner: Eickholt, E. H.
Assistant Examiner:
Attorney: Wegner, Stellman, McCord, Wiles & Wood