High pressure pump

A high pressure pump of the type having a rotatable crank shaft connected to and moving a plunger through a suction stroke and a pressure stroke to urge fluid from the suction chamber into the plunger chamber of the pump and then urge the fluid under pressure through a discharge chamber and out of the pump and further characterized by having a valve system including at least a first valve assembly interposed between the suction chamber and plunger chamber and operationally functioning to open and admit fluid into the plunger chamber during the suction stroke of the plunger, and at least a second valve assembly interposed between the plunger chamber and the discharge chamber and operationally reversed relative to the first valve assembly such that the second valve assembly closes when the first valve assembly is open, and the opening and closing of the first and second valve assemblies is reversed during the pressure stroke of the plunger, comprising,

• an improved valve system wherein each of the valve assemblies is formed by a valve housing,
• said valve housing having a cup-shaped chamber surrounded by an apertured sidewall, an apertured top wall and a defined open bottom wall,
• said valve housing further including a peripheral continuous flange carried on the bottom end thereof and extending for a short distance laterally outwardly from said valve housing,
• a valve seat section formed by a main body portion having a central aperture therethrough and having an inner stepped wall and an outer wall which includes an annular groove formed therein,
• said continuous peripheral flange being sized to seat and be fixedly secured within the space between said inner stepped wall and said outer wall thereby to form an integral valve assembly,
• said valve assembly being completed by a valve cap positioned in arrested arrangement within said valve housing and adapted for reciprocating movement therein such that said valve cap alternately opens and closes said central aperture in response to the movement of fluid therethrough,
• said valve housing including a cup-shaped chamber, said peripheral continuous flange and said valve seat section being formed such that said valve assembly is an integral assembly,
• said pump further including an improved plunger assembly,
• said plunger assembly including a crank case plunger section having an inner end for connection to the crank shaft and an outer end including locking means associated therewith,
• an outer pump plunger section having an inner end including mating lock means for matingly nesting with and engaging said lock means on said crank case plunger section and an opposed pusher end of said pump plunger section,
• said crank case plunger section and said pump plunger section being removably engageable one with respect to the other such that said pump plunger section may be removed from said crank case plunger section to replace the same, and
• means associated with said plunger arrangement for lockingly engaging said crank case plunger section and said pump plunger section in locked relationship during use.