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:
Mar. 11, 2014
Filed:
Oct. 29, 2008
Luke Wadsley, Ames, IA (US);
Niall Caldwell, Edinburgh, GB;
Luke Wadsley, Ames, IA (US);
Niall Caldwell, Edinburgh, GB;
Sauer-Danfoss Aps, Nordborg, DK;
Abstract
If a hydraulic system has several modes of operation, in particular a mode with a high pressure demand (II) and a mode with a high fluid flow demand (II), the hydraulic fluid pump has to be built with an accordingly high fluid flow output. Such a pump is expensive. Therefore it is suggested, to provide two pumps. I.e. a controllable main pump () is provided, which supplies the hydraulic consumer () during phases (I) of high pressure demand. During phases (II) of high fluid flow demand, normally, relatively low pressures are sufficient. Therefore, it is suggested to provide a parallel boost pump (), which supplies the hydraulic consumer () in addition to the high pressure pump (), if a high fluid flow is needed. Excess fluid flow output is avoided by controlling the fluid output flow of main pump