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:
May. 18, 1982
Filed:
Jan. 24, 1980
Applicant:
Inventors:
Donald J Parquet, Burlington, IA (US);
Carl O Pedersen, Burlington, IA (US);
Assignee:
J. I. Case Company, Racine, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F16H / ;
U.S. Cl.
CPC ...
60422 ; 60464 ;
Abstract
A hydraulic fluid flow network, utilizing the fluid returned from by an open center hydraulic system, to augment the charging system of a hydrostatic transmission. The augmented charging system provides oil under pressure to flow into the charging system in the event that charging system pressure flow falls below normal. A back pressure is maintained in the return line header of an open center hydraulic system by a relief valve. Flow is diverted to the charging system by a line containing a non return valve.