Stabilizing check valve

US4129144A · kind A · utility

Inventors

• Bo Andersson
• Richard P. Callahan · Hoosick Falls, US

Key dates

• Filing date: Nov 16, 1976
• Grant date: Dec 12, 1978
• Expiry date: Nov 16, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7938
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A check valve comprising a housing having an annular abutment therein, a spring pressed guide in the abutment, an elastomeric disc on the guide, a conical head with an annular tapering groove facing the disc and a flat apex facing downstream, said guide having fluid passages open upon downstream pressure and the conical head and disc closing and stabilizing the valve upon lack of pressure or reverse pressure.