Hydraulic accumulator

US6866066B2 · kind B2 · utility

Assignee

• HYDAC TECHNOLOGY GMBH · DE

Inventor

• Norbert Weber · Pocking, DE

Key dates

• Filing date: Nov 7, 2001
• Grant date: Mar 15, 2005
• Expiry date: Nov 7, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7792
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic accumulator, especially a piston accumulator, includes an accumulator housing (10) with at least one gas chamber (12) and a fluid chamber (14). These chambers are separated from each other by a separating element (16). At least one of these chambers (12, 14) can be filled with a pressure medium or at least partially emptied through at least one valve control unit (26) which has switching valves (28, 30). One switching valve (28) is accommodated in a corresponding valve location (29), and can be moved in the direction of movement of the separating element (16) from an opening position into closing position and vice-versa. Expensive line network between the hydraulic accumulator and the valve control unit is avoided. Sealing or leakage problems, such as are common in a line network, never occur. The valve control unit (26) is accommodated in a valve block (24) which is independent from the housing (10). The valve block (24) has an additional valve location (31) for an additional switching valve (30) for performing another switching task. The valve locations (29, 31) are configured essentially identically and are situated eccentrically in relation to the longitudinal axis …