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:
Nov. 06, 2001
Filed:
May. 15, 2000
Applicant:
Inventors:
Charles A. Duell, Crestline, OH (US);
Thomas E. Pfeifer, Galion, OH (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65F 3/02 ;
U.S. Cl.
CPC ...
B65F 3/02 ;
Abstract
An improved hydraulic system and method of operating same for waste collection vehicles is provided where a closed center valve in conjunction with a positive displacement pump is used without the need for increasing engine RPM, thus significantly reducing vehicle noise during operation of the hydraulic system.