Improved compressor crankshaft

A fluid pump having a crankcase, fluid pumping pistons and a crankshaft in said crankcase for driving said pistons, said crankshaft having:

• a drive shaft bore extending into one end of said crankshaft;
• at least one bearing surface for receiving one-piece piston connecting rod means;
• said crankshaft having a hollowed-out core extending longitudinally therethrough between positions respectively proximate opposite ends thereof and beyond said bearing surface,
• said drive shaft bore opening into said hollowed-out core, and
• at least one opening in said crankshaft spaced from said bearing surface and communicating through walls of said crankshaft between said hollowed-out core and an interior of said crankcase for receiving lubricant from said crankcase within said hollowed-out crankshaft.

An air compressor having a crankcase, at least one air compressor piston, one-piece piston connecting rod means and a crankshaft in said crankcase, said one-piece piston connecting rod means operably connecting said crankshaft to said piston for driving said piston, wherein said crankshaft is inserted through said one piece connecting rod means on assembly, said crankshaft having:

• a drive shaft bore extending into one end of said crankshaft;
• at least one bearing surface for said one-piece piston connecting rod means, said crankshaft having one end and a crank throw sized for insertion in said one-piece connecting rod means such that said bearing surface is in operative register with said one-piece connecting rod means;
• said crankshaft having a hollowed-out core extending longitudinally therethrough to positions respectively proximate opposite ends thereof and beyond said bearing surface,
• said drive shaft bore opening into said hollowed-out core, and
• at least one opening in said crankshaft spaced from said bearing surface and communicating through walls of said crankshaft between said hollowed-out core and an interior of said crankcase for receiving lubricant from said crankcase within said hollowed-out crankshaft.