Modular foam dispenser

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a deformable valve body within the bore having an axial valve passage therethrough and orifices into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially retractable within the valve passage to uncover the orifices and permit fluids to flow into the valve passage and be dispensed from one end thereof;
• and
• a coil compression spring disposed in the bore and preloaded to apply a substantially constant compression force on the valve body in a direction along the axis of the valving rod.

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a valve body within the bore having an axial valve passage therethrough and orifices into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially retractable within the valve passage to uncover the orifices and permit fluids to flow into the valving passage and be dispensed from one end thereof;
• and
• a stepped scraper washer fixed within the bore and having a hole which is aligned with the valve passage and through which the valving rod extends, inner surfaces of the hole fitting closely about the valving rod for scraping the valving rod during retraction and extension thereof.

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a valve body within the bore having an axial valve passage therethrough and orifices into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially movable within the valve passage from a non-dispensing position to a dispensing position in which the valving rod is retracted to uncover the orifices and permit fluids to flow into the valve passage and be dispensed from one end thereof and out a dispensing opening of the dispenser;
• and
• a cap fixed within the bore adjacent the one end of the valve passage and forming an annular chamber which surrounds an end portion of the valving rod, the cap including a solvent passage extending into the annular chamber for supplying solvent thereinto, a tip of the valving rod in the non-dispensing position being exposed to the annular chamber, whereby the tip is cleaned by flowing solvent into the annular chamber and outwardly therefrom over the tip.

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a valve body within the bore having an axial valve passage therethrough and orifices extending generally radially into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially movable within the valve passage to uncover the orifices and permit fluids to flow into the valving passage and be dispensed from one end thereof;
• and
• access ports extending through the housing and aligned with the orifices so as to provide a path for each orifice for the passage of a cleaning tool into the orifice.

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a valve body within the bore having an axial valve passage therethrough and orifices into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially movable within the valve passage to uncover the orifices and permit fluids to flow into the valving passage and be dispensed from one end thereof, a portion of the bore comprising a solvent chamber;
• and
• a helically formed spring having a plurality of helical turns press fit over the valving rod and residing within the solvent chamber between a pair of spaced apart fixed members which the spring alternately abuts during retraction and extension of the valving rod to cause relative sliding motion between the valving rod and the spring for cleaning foam residue from the valving rod.

A dispenser for dispensing foamable compositions, comprising:

• a housing including an axial bore extending therethrough and fluid flow passages in fluid communication with the bore;
• a dispensing valve including a valve body within the bore having an axial valve passage therethrough and orifices into the valve passage which are in fluid communication with the fluid flow passages of the housing, and a valving rod axially movable within the valve passage from a non-dispensing position to a dispensing position in which the valving rod is retracted to uncover the orifices and permit fluids to flow into the valve passage and be dispensed from one end thereof and out a dispensing opening of the dispenser;
• the housing defining a solvent chamber in the axial bore adjacent the one end thereof, and including a solvent passage for delivering solvent through the housing into the solvent chamber;
• and
• a removable cap fixed within the bore adjacent the one end of the valve passage, the cap including an insert of a sintered material, the insert having a central hole therethrough into which a tip of the valving rod extends in the non-dispensing position, the cap being removably fixed within the bore with the sintered insert in communication with the solvent chamber, whereby the tip is cleaned by flowing solvent into the solvent chamber and through the sintered insert over the tip.

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;
• and
• a 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.