The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1976
Filed:
Jun. 13, 1975
George W Swisher, Jr, Oklahoma City, OK (US);
Don W Smith, Edmond, OK (US);
Gary L Westphall, Oklahoma City, OK (US);
CMI Corporation, Oklahoma City, OK (US);
Abstract
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.