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:
Sep. 21, 2021
Filed:
Jun. 17, 2019
Robert Bosch Gmbh, Stuttgart, DE;
Werner Reith, Eussenheim, DE;
Bernd Urlaub, Steinfeld, DE;
Binh Nguyen-Xuan, Partenstein, DE;
Johannes Wolf, Rechtenbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A pilot-operated hydraulic directional cartridge valve includes an installation sleeve and a control slide. The installation sleeve includes a bore, a first portion towards its front end face, a third portion towards its rear end face, and a second portion between the first and third portions. The first portion has a first external sealing diameter and the third portion has a second external sealing diameter greater than the first external sealing diameter. The second portion includes radial openings and possesses an external diameter greater than first external sealing diameter and smaller than the second external sealing diameter in the region of the radial openings. The control slide is guided in the axial direction on a guide diameter of the installation sleeve, behind the radial openings. The ratio between the first external sealing diameter and the guide diameter is in the range between 1.10 and 1.22.