Recessed valve with built-in backflow preventer

US5947147A · kind A · utility

Assignee

• Friedrich Grohe AG · DE

Inventors

• Werner Gnauert · Iserlohn, DE
• Frank-Thomas Luig · Menden, DE

Key dates

• Filing date: Jun 12, 1997
• Grant date: Sep 7, 1999
• Expiry date: Jun 12, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87249
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A valve has a housing formed with a connection face, an intake port adapted to be connected to a supply of pressurized liquid, an output port, an intake passage extending from the intake port to the connection face, a bore extending from the connection face, an output passage extending from the bore to the output port, and a bleed passage communicating with the atmosphere and opening into the bore. A valve cartridge secured to the connection face is operable to conduct liquid between the intake passage and the bore. A vent valve mounted in the output bore has inner and outer seats and a valve body movable between end positions in each of which it blocks one of the seats. The outer seat lies between the inner seat and the connection face and the output passage opens into the bore between the seats. The bleed passage opens into the bore through the inner seat.