Hydropneumatic accumulator

US6901965B2 · kind B2 · utility

Assignee

• HYDAC TECHNOLOGY GMBH · DE

Inventors

• Herbert Baltes · Losheim, DE
• Markus Lehnert · Dillingen/Saar, DE

Key dates

• Filing date: Mar 13, 2002
• Grant date: Jun 7, 2005
• Expiry date: Mar 13, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2201/415
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic accumulator includes an accumulator housing (1) and a diaphragm (3) forming a displaceable partition element in the housing between a gas chamber (7) and a liquid chamber (5). The membrane has several annular regions (31, 33, 35, 37, 39), interconnected by annular weak points (61, 63, 65, 67, 69, 71). The annular regions (31, 33, 35, 37, 39), have protuberances (81, 83, 85, 87, 89) on the interior face of the membrane (3) facing away from the wall of the accumulator housing (1). The protuberances are at their thickest in the central region between adjacent weak points, thus increasing the wall thickness of the membrane (3), and are at least partially convex (91,93), tapering off to a respective flat form towards the weak points.