Oil control system and regulator

A liquid level regulator for regulating the oil level in a crankcase sump, comprising:

• a closed chamber for containing the liquid,
• inlet means including a cylinder for admitting liquid to said chamber,
• discharge means for discharging liquid from said chamber to the sump,
• piston means slidably movable in said cylinder and contained substantially entirely within said chamber and having a passage therein through which the liquid entering the chamber from said inlet means passes,
• valve means in said inlet means for receiving the liquid from said piston means,
• float means in said chamber connected to said valve means for opening and closing said valve means in response to the level of liquid in said chamber, said float means being mounted to said piston means for movement with said piston means to adjust the elevation of said float means when said piston means is slidably moved, and
• adjustment means for adjusting the elevation of said float means to adjust the level of liquid in said chamber, said adjustment means including rotatable means accessible from the exterior of said chamber for rotation thereof, and coupling means coupling said rotatable means to said pistion means in said closed chamber such that rotation of said rotatable means slidably moves said piston in said cylinder and said float means in elevation while liquid is being admitted through said inlet means.