Robert Mark Fleming

US Patent:

59508752, Sep 14, 1999

Filed:

Mar 31, 1998

Appl. No.:

9/052640

Inventors:

William Lee - Durham NC
John Joseph Corrigan - Washington CT
George Teofilius Bertram - Newtown CT
Robert Neil Fleming - New Milford CT

Assignee:

Sealed Air Corporation - Danbury CT

International Classification:

B67D 560

US Classification:

2221455

Abstract:

A dispenser for mixing foam precursor chemicals and dispensing the foamable mixture includes a first module containing shutoff valves and a second module containing a dispensing valve assembly. The dispensing valve assembly includes a valve body of a self-lubricating material and a valving rod which is reciprocatingly retracted in a valve passage of the valve body to uncover orifices which supply the precursor fluids into the valve passage, from which the mixed chemicals are dispensed. The dispensing valve assembly includes a die spring which urges a washer to compress the valve body along its axis to help prevent cold flow of the valve body away from the valving rod. The valving rod is scraped by inner surfaces of the hole in the washer through which the valving rod is retracted and extended. The die spring is preloaded and retained by a load cylinder which is fixed in the bore in the second housing which contains the dispensing valve.