Bruce H Wisner

US Patent:

44588313, Jul 10, 1984

Filed:

Jul 19, 1982

Appl. No.:

6/399541

Inventors:

Peter M. Holleran - Concord MA
Bruce H. Wisner - Malden MA

Assignee:

W. R. Grace & Co. - Cambridge MA

International Classification:

B05B 712

US Classification:

222134

Abstract:

A dispensing device for mixing and dispensing multi-component liquid mixtures is described. The dispensing device comprises valve assemblies including a tapered valve plug and a correspondingly tapered valve seat and, downstream from the valve assemblies, respective orifices which provide access to a mixing and dispensing nozzle. The cross-sectional area of the orifices is about 1. 7. times. 10. sup. -4 to 2. times. 10. sup. -3 sq. in. and the ratio of the cross-sectional area of the valve opening at any level of operation to the cross-sectional area of its respective downstream orifice is less than about 3. The device generally is configured as a dispensing "gun" and provides a capability for controlled variation in the flow rate of the liquid components and mixing of the components at a consistent volume ratio.