Damping device for check valves

US4330006A · kind A · utility

Assignee

• Kraftwerk Union Aktiengesellschaft · DE

Inventors

• Werner Eck · Laupheim, DE
• Jurgen Hoffmann · Untersiggenthal, CH

Key dates

• Filing date: Aug 13, 1980
• Grant date: May 18, 1982
• Expiry date: Aug 13, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7898
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Damping device for a check valve with a closure member movable by fluid flow, including means defining a chamber, a piston mounted and longitudinally movable in the chamber, a plunger connected to and movable with the piston, the plunger being engageable with a stop just before the closure member reaches a valve closing position thereof and thereby moving the piston in the chamber, the chamber being closed on all sides thereof and filled with fluid, the chamber having a cross section increasing in direction toward the closure member, and spring means for exerting a force on the plunger and the piston in direction towards the closure member.