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. 22, 2020
Filed:
Apr. 11, 2017
Hydac Technology Gmbh, Sulzbach/Saar, DE;
Horst Mannebach, Saarbruecken, DE;
Peter Kloft, Ransbach-Baumbach, DE;
HYDAC TECHNOLOGY GMBH, Sulzbach/Saar, DE;
Abstract
A hydropneumatic piston accumulator has an accumulator housing () with a cylindrical tube () defining a longitudinal axis (). The cylindrical tube () is closed at both ends by housing covers (). A piston () is longitudinally movable in the cylindrical tube () and separates a working chamber () for a compressible medium from a working chamber for an incompressible medium. A displacement measuring device determines the position of the piston () in the housing in a contact-free manner. The displacement measuring device includes a non-magnetic measuring tube () extending along the longitudinal axis () from one housing cover () to the other housing cover () and through a passage () formed in the piston () and is sealed against the interior of the housing (). In the tube (), a position sensor () is movably guided and follows the piston movements in the measuring tube () using a magnetic force acting between the piston sensor () and the piston (). A transmitter/receiver () for the displacement measuring device is positioned on one of the housing covers () and emits a measurement beam through the open end () of the measuring tube () to the position sensor () and receives reflected radiation.