초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [44.] A dispenser for dispensing foamable compositions, comprising:a first module having a first housing which includes a fluid flow passage extending therethrough to a mating face of the first housing;a second module having a second housing which contains a dispensing valve f

[ What is claimed is:] [44.] A dispenser for dispensing foamable compositions, comprising:a first module having a first housing which includes a fluid flow passage extending therethrough to a mating face of the first housing;a second module having a second housing which contains a dispensing valve for dispensing foamable compositions therefrom, the second housing including a fluid flow passage extending from a mating face of the second housing into the dispensing valve, the second module being adapted to be secured to the first module with the respective mating faces abutting each other and the fluid flow passage of the first module aligned with the fluid flow passage of the second module;a recess formed in the mating face of one of the modules surrounding the fluid flow passage thereof, a fluid space being defined by the recess and the mating face of the other module; anda deformable member disposed in the fluid space and adapted to be compressed by the mating face of the other module, and an O-ring surrounding the deformable member, the deformable member having a tapered tubular shape such that compression of the deformable member causes a tubular wall of the deformable member to deflect outwardly to compress the O-ring in a first direction between the tubular wall and an inner wall of the recess, and the O-ring being compressed in a second direction by the mating face of the other module in the direction of the mating face of the one module.