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:
Dec. 27, 2022
Filed:
Aug. 06, 2021
Robert Bosch Gmbh, Stuttgart, DE;
Hakan Camurdan, Neu-Ulm, DE;
Hermann Schuele, Elchingen, DE;
Michael Schuette, Langenau, DE;
Ulrich Schill, Ulm, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A hydraulic drive for a drilling apparatus includes a hydraulic motor that drives a drill and is connected to a main pump via a first and a second working line in a closed hydraulic circuit. The main pump has a steplessly adjustable displacement volume that is adjustable by an actuating cylinder that is connected to a control valve, which has a first feed connector and a first return connector. The first feed connector is connected to an outlet connector of a pressure reducing valve such that the pressure at the feed connector is adjustable to a predefined setpoint pressure by means of the pressure reducing valve. The setpoint pressure is set in a manner which is dependent on a desired high pressure in the closed circuit.