Single lever mixing valve

US4662399A · kind A · utility

Assignee

• Waltec, Inc. · CA

Inventors

• Daniel C. Buchner · Amherst, US
• Alan M. Hale · Guelph, CA

Key dates

• Filing date: Jan 8, 1986
• Grant date: May 5, 1987
• Expiry date: Jan 8, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87088
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a proportioning valve which is of simple design compared to prior art arrangements and is easily constructed. The valve comprises lower and upper body members, the lower body member having a chamber region closed off by a flexible diaphragm of elastomeric material or, in an alternative arrangement, two diaphragms. The bottom of the chamber region has first and second inlets and the wall of the chamber has at least one outlet. Two cam followers are secured above the diaphragm, for axial movement only, in alignment with the inlets and they co-operate with a face cam which is movable both axially and rotationally. Rotation of the face cam results in one cam follower moving up, while the other moves down, thus resulting in movement of one portion of the diaphragm towards its associated inlet while the other moves away from its associated inlet, thereby controlling the relative rates of flow of liquid into the chamber region from the inlets. Axial movement of the face cam causes both cam followers to move upwardly or downwardly by the same amount, thus similarly moving the associated portions of the diaphragm and controlling the total rate of flow of liquid into the chamber…