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. 10, 2014
Filed:
Apr. 27, 2011
Walter Dorr, Völklingen, DE;
Herbert Baltes, Losheim, DE;
Peter Kloft, Ransbach-Baumbach, DE;
Hydac Technology GmbH, Sulzbach/Saar, DE;
Abstract
A dual piston accumulator, in particular for a hydrostatic hybrid drive system for vehicles, replaces a high pressure hydro accumulator and a low pressure hydro accumulator. Inside a single accumulator housing () extending in the axial direction in a single piece over a high pressure part () and a low pressure part (), an accumulator piston () defines a high pressure-sided fluid chamber () and a low pressure-sided fluid chamber (). Both chambers border an intermediate piece () separating the high pressure side () from the low pressure side (). A common piston rod () extends through the intermediate piece for both accumulator pistons (). The wall width of the housing () corresponding to the high pressure part () is greater than the opposite reduced wall width corresponding to the low pressure part ().