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:
Jun. 18, 2024
Filed:
Mar. 03, 2021
Danfoss Power Solutions Aps, Nordborg, DK;
Poul Ennemark, Sønderborg, DK;
Abdul Karim Rahimzai, Sønderborg, DK;
Nils E. Sevelsted, Sønderborg, DK;
DANFOSS POWER SOLUTIONS APS, Nordborg, DK;
Abstract
A fluid controller (), in particular as part of a hydraulic steering unit, is described, said controller () comprising a housing () having a supply port arrangement, a sleeve () arranged rotatably in a bore of the housing (), a spool () arranged rotatably in the sleeve (), and a measuring motor, wherein the measuring motor comprises a plurality of working chambers, each working chamber being connected to the bore, wherein the sleeve () comprises a commutation geometry () having a number of pairs of commutation grooves () and controlling together with a housing geometry () of the housing () a flow of hydraulic fluid into and out of the working chambers and the spool () comprises a spool geometry controlling together with a valve geometry of the sleeve () a flow of hydraulic fluid between the supply port arrangement and the commutation geometry. Such a fluid controller should have a stable control behaviour. To this end at least one of the commutation grooves () comprise a closed bottom and at least one of the commutation grooves () comprise a throughgoing opening () forming part of the valve geometry.