03997277 is referenced by 72 patents and cites 6 patents.

An improved material transfer mechanism comprising a selectively variable speed hydraulic power assembly having an output connected to and powering a material conveyor. A double acting hydraulic ram positions a swash plate control lever that determines the rotational speed of the output shaft, and a hydraulic porting valve assembly is disposed to actuate the hydraulic ram, the hydraulic porting valve assembly comprising a pivotally supported valve body having an internally disposed fluid control means, the fluid control means being variably displaced in the valve body by the actuation of a pressure controlling mechanism for the purpose of selectively determining and establishing fluid communication of a source of hydraulic pressure fluid to alternate ends of the hydraulic ram with the hydraulic porting valve assembly to selectively control the hydraulic ram. The valve body is biased in a first pivotal direction and is movable in a second pivotal direction by a feed back linkage cable interconnecting the valve body and the swash plate control lever. A sensor mechanism detects the material transferred by the material conveyor and responsively positions the pressure controlling mechanism independently to the position of the valve body.

Title
Material transfer mechanism
Application Number
5/586576
Publication Number
3997277
Application Date
June 13, 1975
Publication Date
December 14, 1976
Inventor
Gary L Westphall
Oklahoma City
OK, US
Don W Smith
Edmond
OK, US
George W Swisher Jr
Oklahoma City
OK, US
Agent
Dunlap Codding and McCarthy
Assignee
CMI Corporation
OK, US
IPC
E01C 19/00
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