Check valve

US5141025A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexander Eichhorn · Eppingen, DE
• Hans-Joerg Fees · Bietigheim-Bissingen, DE
• Guenther Hohl · Stuttgart, DE
• Friedrich Megerle · Cologne, DE
• Guenter Kaes · Stuttgart, DE

Key dates

• Filing date: Jun 28, 1991
• Grant date: Aug 25, 1992
• Expiry date: Jun 28, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7928
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A quiet closure check valve, including a housing having a valve seat toward the housing, a ball is associated with the valve seat to close the valve. The ball is received longitudinally displaceably in a recess of a spring-loaded support element that is defined by a bottom and a collar-like portion. Upon closure of the check valve, the support element rests on the housing, by spring action. The ball is lifted from the bottom of the support element and applied to the valve seat by the pressure of the fluid, in a manner free of spring forces. In this way, bothersome vibration of the ball is avoided.